MAXIM MAX4180, MAX4187 Technical data

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX4180 family of current-feedback amplifiers combines high-speed performance, low distortion, and excellent video specifications with ultra-low-power operation in miniature packages. They operate from ±2.25V to ±5.5V dual supplies, or from a single +5V supply. They require only 1mA of supply current per amp­lifier while delivering up to ±60mA of output current drive. The MAX4180/MAX4182/MAX4183/MAX4186 are compensated for applications with a closed-loop gain of +2 (6dB) or greater, and provide a -3dB band­width of 240MHz and a 0.1dB bandwidth of 70MHz. The MAX4181/MAX4184/MAX4185/MAX4187 are com­pensated for applications with a +1 (0dB) or greater gain, and provide a -3dB bandwidth of 270MHz and a
0.1dB bandwidth of 60MHz.
The MAX4180–MAX4187 feature 0.08%/0.03° differen­tial gain and phase errors, a 20ns settling time to 0.1%, and a 450V/µs slew rate, making them ideal for high­performance video applications. The MAX4180/ MAX4181/MAX4183/MAX4185 have a low-power shut­down mode that reduces power-supply current to 135µA and places the outputs in a high-impedance state. This feature makes them ideal for multiplexing applications.
The single MAX4180/MAX4181 are offered in space­saving 6-pin SOT23 packages.
________________________Applications
Portable/Battery-Powered High-Definition Video/Multimedia Systems Surveillance Video
Broadcast and High-Definition Professional TV Systems Cameras
High-Speed A/D Buffers Video Switching/
Multiplexing
CCD Imaging Systems
Medical Imaging
Features
Ultra-Low Supply Current: 1mA per AmplifierShutdown Mode
Outputs Placed in High-Z Supply Current Reduced to 135µA
Operate from a Single +5V Supply or
Dual ±5V Supplies
Wide Bandwidth
270MHz -3dB Small-Signal Bandwidth (MAX4181/MAX4184/MAX4185/MAX4187)
450V/µs Slew RateFast, 20ns Settling Time to 0.1%Excellent Video Specifications
Gain Flatness to 70MHz (MAX4180/MAX4182/MAX4183/MAX4186)
0.08%/0.03° Differential Gain/Phase
Low Distortion:
-73dBc SFDR (f
C
= 5MHz, V
OUT
= 2Vp-p)
Available in Tiny Surface-Mount Packages
6-Pin SOT23 (MAX4180/MAX4181) 10-Pin µMAX (MAX4183/MAX4185) 16-Pin QSOP (MAX4186/MAX4187)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
________________________________________________________________ Maxim Integrated Products 1
19-1221; Rev 3; 8/01
Pin Configurations
Selector Guide
Pin Configurations continued at end of data sheet.
AAAB
TOP
MARK
8 SO
6 SOT23-6
PIN­PACKAGE
TEMP
RANGE
-40°C to +85°C
-40°C to +85°CMAX4180ESA
MAX4180EUT-T
PART
Ordering Information continued at end of data sheet.
Ordering Information
AV≥ 1No4MAX4187
AV≥ 2No4MAX4186
AV≥ 1
AV≥ 1
AV≥ 2
AV≥ 2
AV≥ 1
AV≥ 2
OPTIMIZED
FOR
Yes
No
Yes
No
Yes
Yes
SHUTDOWN
MODE
2
2
2
2
1
1
NO. OF
AMPS
MAX4184
MAX4185
PART
MAX4182
MAX4183
MAX4180
MAX4181
TOP VIEW
OUT
V
IN+
SINGLE
1
MAX4180
2
EE
MAX4181
3
SOT23-6
6
V
CC
5
SHDN
IN-
4
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
2 _______________________________________________________________________________________
G
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICSDual Supplies
(VCC= +5V, VEE= -5V, VIN+ = 0, SHDN 3V; TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VCCto VEE) .................................................12V
Analog Input Voltage.......................(V
EE
- 0.3V) to (VCC+ 0.3V)
Differential Input Voltage.......................................................±2V
SHDN Input Voltage ........................(V
EE
- 0.3V) to (VCC+ 0.3V)
Short-Circuit Duration (OUT to GND, V
CC
or VEE).....Continuous
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
10-Pin µMAX (derate 5.60mW/°C above +70°C) ..........444mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
16-Pin QSOP (derate 8.30mW/°C above +70°C)..........667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
SHDN Logic High Threshold
V
IH
V
CC
- 2.0 V(Notes 3, 4)
Open-Loop Transresistance
Input Bias Current (Negative Input)
I
B-
±1 ±12 µA
µA
250 800
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Bias Current (Positive Input)
I
B+
Input Offset-Voltage Matching ±1
±1 ±7
k
Input Resistance (Positive Input)
R
IN+
Input Resistance (Negative Input)
R
IN-
160
Input Offset Voltage
Input Voltage Range V
CM
±3.6 ±3.9 V
V
OS
±1.5 ±7 mV
Input Offset-Voltage Drift TC
VOS
±12 µV/°C
Common-Mode Rejection Ratio CMRR -50 -58 dB
T
R
0.8 3.0
M
0.3 0.9
Output Voltage Swing V
SW
±3.75 ±4.0
V
±3.0 ±3.3
±3.0
Output Short-Circuit Current I
SC
±80 mA
Output Resistance R
OUT
0.2
Disabled Output Leakage Current
I
OUT(OFF)
±0.1 ±6.0 µA
SHDN Logic Low Threshold
V
IL
VCC- 3.0 V
CONDITIONS
-3.6V ≤ VCM≤ 3.6V
MAX4182–MAX4187
RL= 1k, V
OUT
= ±3.6V
RL= 150, V
OUT
= ±2.5V
-3.6V ≤ V
IN+
3.6V, -1V (V
IN+
- V
IN-
) 1V
RL= 1k
RL= 150
RL= 100
Guaranteed by CMRR test
VCM= 0
SHDN ≤ VIL, V
OUT
±3V (Notes 2, 4)
(Notes 3, 4)
mV
Output Current I
OUT
±32 ±60 mARL= 30
TOP VIEW
SIN
1
OUT
V
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICSDual Supplies (continued)
(VCC= +5V, VEE= -5V, VIN+ = 0, SHDN 3V; TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
DC ELECTRICAL CHARACTERISTICSSingle Supply
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN 3V, RLto VCC/2; TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL MIN TYP MAX UNITS
Positive Power-Supply Rejection Ratio
PSRR+
SHDN Logic Input Bias Current
I
IN
±0.1 ±2.0 µA
Negative Power-Supply Rejection Ratio
PSRR- 53 62
60 71
VCC= 5V, VEE= -4.5V to -5.5V dB
Operating Supply Voltage V
CC/VEE
±2.25 ±5.50 V
Quiescent Supply Current per Amplifier
I
S
1.0 1.3 mA
I
S(OFF)
135 180 µA
CONDITIONS
RL=
VEE= -5V, VCC= 4.5V to 5.5V
Shutdown Supply Current per Amplifier
VEE≤ SHDN ≤ VCC(Note 4)
dB
SHDN = 0, RL= (Note 4)
MAX418_EUT
All other packages 1.0 1.2
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Bias Current (Positive Input)
I
B+
Input Offset Voltage Matching ±1 mV
Input Bias Current (Negative Input)
I
B-
±1 ±12
±1 ±7
k
Input Resistance (Positive Input)
R
IN+
µA
Input Resistance (Negative Input)
R
IN-
160
Input Offset Voltage
Input Voltage Range V
CM
1.3 to 1.1 to
3.7 3.9
V
V
OS
±1.5 ±7 mV
Input Offset Voltage Drift TC
VOS
±12 µV/°C
Common-Mode Rejection Ratio
CMRR -50 -58 dB
T
R
0.8 2.5
M
0.275 0.9
CONDITIONS
1.3V ≤ VCM≤ 3.7V
Open-Loop Transresistance
MAX4182–MAX4187
µA
250 800
RL= 1k, V
OUT
= 1.2V to 3.8V
RL= 150, V
OUT
= 1.4V to 3.6V
1.3V ≤ V
IN+
3.7V, -1V (V
IN+
- V
IN-
) 1V
1.15 to 1.0 to
3.85 4.0
VCM= 2.5V
V
1.35 to 1.2 to
3.65 3.8
RL= 1k
RL= 150
Output Voltage Swing V
SW
1.3 to
3.7
RL= 100
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
4 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICSSingle Supply (continued)
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN 3V, RLto VCC/2; TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX4180/4182/4183/4186)
(VCC= +5V, VEE= -5V, VIN= 0, SHDN 3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Power-Supply Rejection Ratio PSRR 60 71
Output Current I
OUT
±18 ±30 mA
Output Short-Circuit Current I
SC
±50 mA
Output Resistance R
OUT
0.2
dBV
CC
= 4.5V to 5.5V
Shutdown Supply Current per Amplifier
I
S(OFF)
Disabled Output Leakage Current
I
OUT(OFF
) ±0.1 ±4.0 µA
135 180 µA
SHDN = 0, RL= (Note 4)
Quiescent Supply Current per Amplifier
SHDN Logic-Low Threshold
V
IL
V
CC -
3.0
V
CONDITIONS
I
S
1.0 1.25 mARL =
Operating Supply Voltage V
CC
4.5 5.5 V
SHDN Logic Input Bias Current
I
IN
±0.1 ±2.0 µA
0 SHDN ≤ VCC(Note 4)
RL = 30
SHDN Logic-High Threshold
V
IH
V
CC -
2.0
V
SHDN ≤ VIL, 1.2V ≤ V
OUT
3.8V
(Notes 2, 4)
(Notes 3, 4)
(Notes 3, 4)
MAX418_EUT
All other packages 1.0 1.2
Third Harmonic Distortion
-73
dBc
-57RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
Second Harmonic Distortion
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% t
S
20 ns
Slew Rate (Note 5) SR
340 450
V/µs
-83
dBc
-68
Bandwidth for 0.1dB Flatness (Note 5)
BW
0.1dB
30 70
MHz
Rise/Fall Time tR, t
F
5 ns
Spurious-Free Dynamic Range SFDR
73
dBc
RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
57
190
Small-Signal -3dB Bandwidth (Note 5)
BW
SS
180 245
MHz
RL = 150
<0.5dB peaking
70
Large-Signal -3dB Bandwidth BW
LS
150 MHz
CONDITIONS
V
OUT
= 2V step, RL= 1k
V
OUT
= 2V step, RL= 1k
RL= 150
RL= 1k
V
OUT
= 2V step, RL= 1k
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
RL=150
RL=1k
V
OUT
= 2Vp-p, RL= 1k
Rising edge
Falling edge 315 420
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
________________________________________________________________________________________ 5
AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX4181/4184/4185/4187)
(V
CC
= +5V, VEE= -5V, V
IN+
= 0, SHDN 3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
Differential Phase Error DP
0.01 degrees
0.48RL = 150
NTSC
RL = 1k
Third Harmonic Distortion
-57 dB
-66RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
Second Harmonic Distortion
-70 dB
-73RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
66RL = 150
RL = 1k
205
55RL= 150
RL = 150
<0.5dB peaking
RL = 1k
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% t
S
21 ns
Slew Rate (Note 5) SR
250 320
V/µs
Bandwidth for 0.1dB Flatness (Note 5)
BW
0.1dB
20 60
MHz
Rise/Fall Time tRand t
F
5 ns
Spurious-Free Dynamic Range SFDR
57
dB
Small-Signal -3dB Bandwidth (Note 5)
BW
SS
195 270
MHz
Large-Signal -3dB Bandwidth BW
LS
90 MHz
CONDITIONS
V
OUT
= 2V step, RL= 1k
RL= 1k
V
OUT
= 2V step, RL= 1k
fC= 5MHz, V
OUT
= 2Vp-p
V
OUT
= 2Vp-p, RL= 1k
Rising edge
V
OUT
= 2V step, RL= 1k
Falling edge 200 265
AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX4180/4182/4183/4186) (cont.)
(VCC= +5V, VEE= -5V, VIN= 0, SHDN 3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance (Positive Input)
C
IN+
1.5 pF
Output Impedance Z
OUT
4.8
Disabled Output Capacitance C
OUT(OFF)
4 pF
Turn-On Time from SHDN
t
ON
40 ns
Turn-Off Time to SHDN
t
OFF
400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
CONDITIONS
f = 10kHzInput Noise-Voltage Density e
n
f = 10kHz SHDN ≤ VIL, V
OUT
±3V (Notes 2, 4)
(Note 4)
(Note 4)
nV/Hz
f = 10MHz, MAX4182/4183/4186
2
f = 10MHz, MAX4182/4183/4186
Off-Isolation -60 dB
SHDN ≤ 2V, RL= 150, f = 10MHz
NTSCDifferential Phase Error DP
0.03 degrees
0.30RL = 150
RL = 1k
NTSCDifferential Gain Error DG
0.08
%
0.01RL = 150
RL = 1k
f = 10kHz
Input Noise-Current Density i
n
4
pA/Hz
5IN-
IN+
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
6 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX4180/4182/4183/4186)
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN 3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
Differential Phase Error DP
0.01 degrees
0.35RL = 150
NTSC
RL = 1k
Third Harmonic Distortion
-72 dBc
-57RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
Second Harmonic Distortion
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% t
S
20 ns
Slew Rate (Note 5) SR
260 340
V/µs
-80 dBc
-76
Bandwidth for 0.1dB Flatness (Note 5)
BW
0.1dB
20 50
MHz
Rise/Fall Time tR and t
F
6 ns
Spurious-Free Dynamic Range SFDR
72
dB
RL = 150
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
57
165
Small-Signal -3dB Bandwidth (Note 5)
BW
SS
155 210
MHz
RL = 150
<0.5dB peaking
40
Large-Signal -3dB Bandwidth BW
LS
110 MHz
CONDITIONS
V
OUT
= 2V step, RL= 1k
V
OUT
= 2V step, RL= 1k
RL= 150
RL= 1k
V
OUT
= 2V step, RL= 1k
fC= 5MHz, V
OUT
= 2Vp-p
RL = 1k
RL = 150
RL = 1k
V
OUT
= 2Vp-p, RL= 1k
Rising edge
Falling edge 220 300
AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX4181/4184/4185/4187) (cont.)
(VCC= +5V, VEE= -5V, V
IN+
= 0, SHDN 3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
f = 10kHz
Input Noise-Voltage Density e
n
2
nV/Hz
NTSCDifferential Gain Error DG
0.09 %
0.16RL= 150
RL= 1k
f = 10kHz
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Noise-Current Density i
n
4
pA/Hz
5
Input Capacitance (Positive Input)
C
IN+
1.5 pF
Output Impedance Z
OUT
4.8
Disabled Output Capacitance C
OUT(OFF)
4 pF
Turn-On Time from SHDN
t
ON
50 ns
Turn-Off Time to SHDN
t
OFF
400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
CONDITIONS
IN-
IN+
f = 10kHz SHDN ≤ VIL, V
OUT
±3V (Notes 2, 4)
(Note 4)
(Note 4)
f = 10MHz, MAX4184/MAX4185/MAX4187
f = 10MHz, MAX4184/MAX4185/MAX4187
Off-Isolation -54 dB
SHDN ≤ 2V, RL= 150, f = 10MHz
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 7
AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX4181/4184/4185/4187)
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN ≥ 3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
V
OUT
= 2Vp-p, RL= 1k
RL = 1k
RL = 150
RL = 1k
fC= 5MHz, V
OUT
= 2Vp-p
V
OUT
= 2V step, RL= 1k
RL= 1k
RL= 150
V
OUT
= 2V step, RL= 1k
CONDITIONS
MHz110BW
LS
Large-Signal -3dB Bandwidth
30
<0.5dB peaking
RL = 150
MHz
175 220
BW
SS
Small-Signal -3dB Bandwidth (Note 5)
170
59
RL = 1k
fC= 5MHz, V
OUT
= 2Vp-p
RL = 150
dB
55
SFDRSpurious-Free Dynamic Range
ns7tR and t
F
Rise/Fall Time
MHz
16 40
BW
0.1dB
Bandwidth for 0.1dB Flatness (Note 5)
-72
dBc
-61
V/µs
210 275
SRSlew Rate (Note 5)
ns22t
S
Settling Time to 0.1%
UNITSMIN TYP MAXSYMBOLPARAMETER
Second Harmonic Distortion
RL = 1k
fC= 5MHz, V
OUT
= 2Vp-p
RL = 150 -59
dBc
-55
Third Harmonic Distortion
RL = 1k
NTSC degrees
0.01
DPDifferential Phase Error
0.35RL = 150
V
OUT
= 2V step, RL= 1k
Rising edge
Falling edge 170 215
AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX4180/4182/4183/4186) (cont.)
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN 3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance (Positive Input)
C
IN+
1.5 pF
Output Impedance Z
OUT
4.8
Disabled Output Capacitance C
OUT(OFF)
4 pF
Turn-On Time from SHDN
t
ON
40 ns
Turn-Off Time to SHDN
t
OFF
400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
Input Noise-Voltage Density e
n
2
nV/Hz
NTSCDifferential Gain Error
CONDITIONS
DG
f = 10kHz
0.10 %
0.03RL= 150
RL= 1k
f = 10kHz
Input Noise-Current Density i
n
f = 10kHz SHDN ≤ VIL, 1.2V ≤ V
OUT
3.8V (Notes 2, 4)
(Note 4)
4
(Note 4)
pA/Hz
f = 10MHz, MAX4182/MAX4183/MAX4186
5
f = 10MHz, MAX4182/MAX4183/MAX4186
IN-
IN+
Off-Isolation -60 dB
SHDN ≤ 2V, RL= 150, f = 10MHz
__________________________________________Typical Operating Characteristics
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
8 _______________________________________________________________________________________
G
Note 1: The MAX418_EUT is 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by
design.
Note 2: Does not include current into the external-feedback network. Note 3: Over operating supply-voltage range. Note 4: Specification applies to MAX4180/MAX4181/MAX4183 and MAX4185. Note 5: The AC specifications shown are not measured in a production test environment. The minimum AC specifications given are
based on the combination of worst-case design simulations along with a sample characterization of units. These minimum specifications are for design guidance only and are not intended to guarantee AC performance (see AC Testing/Perform- ance). For 100% testing of those parameters, contact the factory.
4
3
2
1
-6 1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCA
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2k R
L
= 1k
RF = RG = 680 R
L
= 100
OR R
F
= RG = 820
R
L
= 150
VIN = 20mVp-p A
V
= +2V/V
4
3
2
1
-6 1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCB
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2k R
L
= 1k
RF = RG = 680 R
L
= 100
OR R
F
= RG = 820
R
L
= 150
VCC = +5V V
IN
= 20mVp-p
A
V
= +2V/V
4
3
2
1
-6 1 10010 1000
MAX4181 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCD
FREQUENCY (MHz)
GAIN (dB)
RF = 1k R
L
= 150
OR R
F
= 560
R
L
= 100
VIN = 20mVp-p A
V
= +1V/V
RF = 2.4k
R
L
= 1k
AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX4181/4184/4185/4187) (cont.)
(VCC= +5V, VEE= 0, VIN+ = 2.5V, SHDN ≥ 3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance (Positive Input)
C
IN+
1.5 pF
Output Impedance Z
OUT
4.8
Disabled Output Capacitance C
OUT(OFF)
4 pF
Turn-On Time from SHDN
t
ON
40 ns
Turn-Off Time to SHDN
t
OFF
400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
Input Noise-Voltage Density e
n
2
nV/Hz
NTSCDifferential Gain Error
CONDITIONS
DG
f = 10kHz
0.10 %
0.03RL= 150
RL= 1k
f = 10kHz
Input Noise-Current Density i
n
f = 10kHz SHDN ≤ VIL, 1.2V ≤ V
OUT
3.8V (Notes 2, 4)
(Note 4)
4
(Note 4)
pA/Hz
f = 10MHz, MAX4184/MAX4185/MAX4187
5
f = 10MHz, MAX4184/MAX4185/MAX4187
IN-
IN+
Off-Isolation -54 dB
SHDN ≤ 2V, RL= 150, f = 10MHz
TOP VIEW
SIN
1
OUT
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 9
Typical Operating Characteristics (continued)
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
4
3
2
1
-6 1 10010 1000
MAX4181 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCE
FREQUENCY (MHz)
GAIN (dB)
RF = 1k R
L
= 150
OR R
F
= 560
R
L
= 100
VCC = +5V V
IN
= 20mVp-p
A
V
= +1V/V
RF = 2.4k R
L
= 1k
-6
-5
-4
-3
-2
-1
0
1
3
2
4
1 10 1000
MAX4182/MAX4183 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87AA
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
100
VS = ±5V V
IN
= 20mVp-p
A
V
= +2V/V
RF = RG = 620 R
L
= 100
RF = RG = 680 R
L
= 150
RF = RG = 1k
-6
-5
-4
-3
-2
-1
0
1
3
2
4
1 10 1000
MAX4184/MAX4185 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87BB
FREQUENCY (MHz)
GAIN (dB)
100
VS = ±5V V
IN
= 20mVp-p
A
V
= +1V/V
RF = 750 R
L
= 150
R
F
= 1.5k
R
L
= 1k
RF = 620 R
L
= 100
-6
-5
-4
-3
-2
-1
1
0
2
1 10 1000
MAX4186 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87CC
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
100
VS = ±5V V
IN
= 20mVp-p
A
V
= +2V/V
RF = RG = 680 R
L
= 100
RF = RG = 750 R
L
= 150
RF = RG = 1.1k R
L
= 1k
4
3
2
1
-6 1 10010 1000
MAX4180 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCJ
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2k R
L
= 1k
OR R
F
= RG = 820
R
L
= 150
AV = +2V/V V
OUT
= 2Vp-p
0.4
0.3
0.2
0.1
-0.6 1 10010 1000
MAX4180 GAIN FLATNESS vs.
FREQUENCY (SINGLE & DUAL SUPPLIES)
-0.5
-0.4
-0.3
-0.1
-0.2
0
MAX1480-87 TOCF
FREQUENCY (MHz)
GAIN (dB)
VS = ±5V R
F
= R
G
= 1.2k
R
L
= 1k
VS = ±5V
R
F
= RG = 820
R
L
= 150
VCC = +5V
R
F
= RG = 1.2k
R
L
= 1k
V
CC
= +5V
R
F
= RG = 820k
R
L
= 150
VIN = 20mVp-p A
V
= +2V/V
0.4
0.3
0.2
0.1
-0.6 1 10010 1000
MAX4181 GAIN FLATNESS vs.
FREQUENCY (SINGLE & DUAL SUPPLIES)
-0.5
-0.4
-0.3
-0.1
-0.2
0
MAX1480-87 TOCH
FREQUENCY (MHz)
GAIN (dB)
VS = ±5V R
F
= 2.4k
R
L
= 1k
VCC = +5V R
F
= 1k
R
L
= 150
VCC = +5V R
F
= 2.4k
R
L
= 1k
VS = ±5V R
F
= 1k
R
L
= 150
VIN = 20mVp-p A
V
= +1V/V
4
3
2
1
-6 1 10010 1000
MAX4180 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCK
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
V
OUT
= 1Vp-p
R
F
= RG = 680
R
L
= 100
RF = RG = 820
R
L
= 150
V
OUT
= 2Vp-p
OR
R
F
= RG = 1.2k
R
L
= 1k
V
OUT
= 2Vp-p
VCC = +5V A
V
= +2V/V
MAX4187 SMALL-SIGNAL GAIN
4
VS = ±5V
3
= 20mVp-p
V
IN
2
= +1V/V
A
V
1
0
-1
GAIN (dB)
-2
-3
-4
-5
-6 1 10 1000
vs. FREQUENCY
RF = 680
= 100
R
L
RF = 910
= 150
R
L
100
FREQUENCY (MHz)
RF = 1.6k
= 1k
R
L
MAX4180-87DD
-120
-110
-100
-90
-80
-70
-60
-50
-30
-40
-20
110
MAX4182 CROSSTALK
vs. FREQUENCY
MAX4180-87EE
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
V
OUTB
= 2Vp-p
V
OUTA
MEASURED
A
V
= +2V/V
RF = RG = 1k R
L
= 1k
RF = RG = 680 R
L
= 150
-100
-90
-80
-70
-60
-50
-40
-30
-10
-20
0
110
MAX4187 CROSSTALK
vs. FREQUENCY
MAX4180-87HH
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
V
OUTA
= 2Vp-p
V
OUTD
MEASURED
A
V
= +1V/V
RF = 910 R
L
= 150
RF = 1.6k R
L
= 1k
-120
-110
-100
-90
-80
-70
-60
-50
-30
-40
-20
110
MAX4184 CROSSTALK
vs. FREQUENCY
MAX4180-87FF
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
V
OUTB
= 2Vp-p
V
OUTA
MEASURED
A
V
= +1V/V
RF = 750 R
L
= 150
RF = 1.5k R
L
= 1k
-100
-90
-80
-70
-60
-50
-40
-30
-10
-20
0
110
MAX4186 CROSSTALK
vs. FREQUENCY
MAX4180-87GG
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
V
OUTD
= 2Vp-p
V
OUTA
MEASURED
A
V
= +2V/V
RF = RG = 1.1k R
L
= 1k
RF = RG = 750 R
L
= 150
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
4
3
2
1
-6 1 10010 1000
MAX4181 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCM
FREQUENCY (MHz)
GAIN (dB)
AV = +1V/V
V
OUT
= 2Vp-p
R
F
= 2.4k
R
L
= 1k
OR V
OUT
= 2Vp-p
R
F
= 1k
R
L
= 150
V
OUT
= 1Vp-p
R
F
= 560
R
L
= 100
4
3
2
1
-6 1 10010 1000
MAX4181 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MA480-87 TOCN
FREQUENCY (MHz)
GAIN (dB)
VCC = +5V A
V
= +1V/V
V
OUT
= 1Vp-p
R
F
= 560
R
L
= 100
V
OUT
= 2Vp-p
R
F
= 1k
R
L
= 150
OR V
OUT
= 2Vp-p
R
F
= 2.4k
R
L
= 1k
0
-10
-20
-30
-90
0.10.01 101 100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-80
-70
-50
-60
-40
MAX1480-87 TOCP
FREQUENCY (MHz)
PSRR (dB)
V
CC
(MAX4181)
V
CC
(MAX4180)
V
EE
(MAX4181)
V
EE
(MAX4181)
100
10
0.1
0.1 101 1000100
OUTPUT IMPEDANCE vs. FREQUENCY
1
MAX1480-87 TOCQ
FREQUENCY (MHz)
OUTPUT IMPEDANCE ()
4
3
2
1
-6 1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY
-5
-4
-3
-1
-2
0
MAX1480-87 TOCL
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
VS = ±5V V
IN
= 20mVp-p
R
L
= 1k
AV = +5V/V
R
F
= 910
R
G
= 220
AV = +10V/V
R
F
= 750
R
G
= 82
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 11
Typical Operating Characteristics (continued)
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
-30
-100
0.1 1 100
MAX4180 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-80
-90
-60
-70
-40
-50
MAX4180 TOC16
FREQUENCY (MHz)
DISTORTION (dBc)
10
3RD (RL = 1k)
2ND (RL = 1k)
2ND (RL = 150)
3RD (RL = 150)
3.4
3.2
2.8
2.4
2.0
1.6
1.4 100 1M1k 10k 100k 10M 100M 1G
VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
1.8
MAX4180 TOC14
FREQUENCY (Hz)
2.2
2.6
3.0
VOLTAGE-NOISE DENSITY (nV/Hz)
45
35
25
15
5
0
100 1M1k 10k 100k 10M 100M 1G
TOTAL VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
10
MAX4180 TOC15
FREQUENCY (Hz)
20
30
40
1.2k
1.2k
V
IN
V
OUT
VOLTAGE-NOISE DENSITY (nV/Hz)
-30
0.1 1 100
MAX4181 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-80
-100
-90
-60
-70
-40
-50
MAX4180 TOC18
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 150)
2ND (RL = 1k)
3RD (RL = 150)
3RD (RL = 1k)
-30
0.1 1 100
MAX4180 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-80
-90
-60
-70
-40
-50
MAX4180 TOC17
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 150)
2ND (RL = 1k)
3RD (RL = 150)
3RD (RL = 1k)
-30
0.1 1 100
MAX4181 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-80
-90
-60
-70
-40
-50
MAX4180 TOC19
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 1k)
3RD (RL = 150)
3RD (RL = 1k)
2ND (RL = 150)
0.75
1.00
1.25
95
125
155
140
110
-60 -20 0-40 20 40 60 80 100
SUPPLY CURRENT
(OPERATING & SHUTDOWN)
vs. TEMPERATURE
MA4180 TOC21
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
SHUTDOWN SUPPLY CURRENT (µA)
SHUTDOWN SUPPLY CURRENT
SUPPLY CURRENT
20
25
35
30
40
45
10 20 2515 30 35 40 45 50
TWO-TONE THIRD-ORDER INTERCEPT
vs. FREQUENCY
MAX4180 TOC20
FREQUENCY (MHz)
THIRD-ORDER INTERCEPT (dBm)
MAX4181
MAX4180
f2 = f1 + 0.1MHz
-5
-3
5
3
1
-1
-60 -20 0-40 20 40 60 80 100
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
MA4180 TOC22
TEMPERATURE (°C)
OUTPUT SWING (V)
RL = 150
RL = 150
RL = 1k
RL = 1k
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
12 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
1.0
INPUT BIAS CURRENT
vs. TEMPERATURE
INPUT OFFSET VOLTAGE
4
vs. TEMPERATURE
SMALL-SIGNAL PULSE RESPONSE
MAX4181
0.8
0.6
0.4
INPUT BIAS CURRENT (µA)
0.2
0
-60 -20 0-40 20 40 60 80 100 TEMPERATURE (°C)
I
B-
I
B+
MA4180 TOC23
INPUT OFFSET VOLTAGE (mV)
POWER-ON TRANSIENT
+10
V
GND
+5V
V
OUT
GND
CC
100µs/div
= 1k, V
R
F
= VCC/2, RL =
IN
3V
MAX4180/87-TOC27
GND
2V
GND
3
2
1
0
-60 -20 0-40 20 40 60 80 100 TEMPERATURE (°C)
SHUTDOWN RESPONSE TIME
AV = +2V/V
= 1V
V
IN+
100ns/div
R
= 150Ω, RF = RG = 820
L
DC
+50mV
MA4180 TOC24
-50mV
+50mV
OUT
-50mV
+0.5V
MAX4180/87-TOC28
SHDN
-0.5V
OUT
IN
R
= 1kΩ, RL = 150
F
MAX4180
LARGE-SIGNAL PULSE RESPONSE
IN
+1V
-1V
RL = 1kΩ, RF = RG = 1.2k
MAX4180/87-TOC26
10ns/div
MAX4180/87-TOC29
10ns/div
LARGE-SIGNAL PULSE RESPONSE
+0.5V
IN
-0.5V
+1V
OUT
-1V
RL = 100Ω, RF = RG = 680
MAX4180
10ns/div
+0.5V
MAX4180/87-TOC31
-0.5V
+1V
OUT
-1V
LARGE-SIGNAL PULSE RESPONSE
IN
RL = 150Ω, RF = RG = 820
MAX4180
10ns/div
+25mV
MAX4180/87-TOC30
-25mV
+50mV
OUT
-50mV
SMALL-SIGNAL PULSE RESPONSE
IN
RL = 1kΩ, RF = RG = 1.2k
MAX4180
MAX4180/87-TOC32
10ns/div
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 13
Typical Operating Characteristics (continued)
(VCC= +5V, VEE= -5V, TA = +25°C, unless otherwise noted.)
RL = 100Ω, RF = RG = 680
+25mV
+50mV
MAX4180
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC34
10ns/div
OUT
-50mV
IN
-25mV
RL = 1k, RF = 2.4k
+50mV
+50mV
MAX4181
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC36
10ns/div
IN
OUT
-50mV
-50mV
VS = ±5V, RL = 1kΩ, RF = 2.4k
+1V
+1V
MAX4181
LARGE-SIGNAL PULSE RESPONSE
MAX4180/87-TOC35
10ns/div
IN
-1V
OUT
-1V
Pin Description
MAX4180/MAX4181
MAX4180/MAX4181
4
3
SOT23-6
5
6
Inverting InputIN-2
Noninverting InputIN+3
1
2
Negative Power Supply. Connect VEEto -5V or ground for single-supply operation.
V
EE
4
FUNCTIONNAME
Shutdown Input. Device is enabled when SHDN (VCC- 2V) and disabled when SHDN (V
CC
- 3V).
SHDN
8
Positive Power Supply. Connect V
CC
to +5V.V
CC
7
Amplifier OutputOUT6
PIN
No Connection. Not internally connected.N.C.1, 5
SO
SMALL-SIGNAL PULSE RESPONSE
+25mV
IN
-25mV
+50mV
OUT
-50mV
RL = 150Ω, RF = RG = 820
MAX4180
MAX4180/87-TOC33
10ns/div
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
14 ______________________________________________________________________________________
MAX4186/MAX4187
_________________________________________________Pin Description (continued)
MAX4182/MAX4183/MAX4184/MAX4185
SO SO
1
µMAX
1
MAX4183 MAX4185
PIN
MAX4183 MAX4185
4
5, 7, 8, 10
4
Amplifier A OutputOUTA1
3
2 Amplifier A Inverting InputINA-2
3
2
FUNCTIONNAME
MAX4182 MAX4184
No Connection. Not internally connected.N.C.
Negative Power Supply. Connect VEEto -5V or ground for single-supply operation.
V
EE
4
Amplifier A Noninverting InputINA+3
6 5
SHDNA
Shutdown Control Input for Amplifier A. Amplifier A is enabled when SHDNA (V
CC
- 2V) and disabled when
SHDNA ≤ (V
CC
- 3V).
9 6
SHDNB
Shutdown Control Input for Amplifier B. Amplifier B is enabled when SHDNB (V
CC
- 2V) and disabled when
SHDNB ≤ (V
CC
- 3V).
5 11 7 INB+ Amplifier B Noninverting Input
6 12 8 INB- Amplifier B Inverting Input
7 13 9 OUTB Amplifier B Output
8 14 10 V
CC
Positive Power Supply. Connect V
CC
to +5V.
1
2
MAX4186 MAX4187
PIN
6
5
Amplifier A OutputOUTA1
Amplifier A Inverting InputINA-2
4
3 Amplifier A Noninverting InputINA+3
FUNCTIONNAME
MAX4186 MAX4187
Amplifier B Inverting InputINB-6
Amplifier B Noninverting InputINB+5
Positive Power Supply. Connect VCCto +5V.V
CC
4
7 7 OUTB Amplifier B Output
8, 9 N.C. No Connection. Not internally connected.
8 10 OUTC Amplifier C Output
9 11 INC- Amplifier C Inverting Input
10 12 INC+ Amplifier C Noninverting Input
11 13 V
EE
Negative Power Supply. Connect V
EE
to -5V or ground for
single-supply operation.
12 14 IND+ Amplifier D Noninverting Input
13 15 IND- Amplifier D Inverting Input
14 16 OUTD Amplifier D Output
QSOPSO
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 15
Detailed Description
The MAX4180–MAX4187 are ultra-low-power current­feedback amplifiers featuring bandwidths up to 270MHz, 0.1dB gain flatness to 90MHz, and low differ­ential gain (0.08%) and phase (0.03°) errors. These amplifiers achieve ultra-high bandwidth-to-power ratios with low distortion, wide signal swing, and excellent load-driving capabilities. They are optimized for ±5V supplies but also operate from a single +5V supply while consuming only 1mA per amplifier. With ±60mA output current drive capability, the devices achieve low distortion even while driving 150loads.
Wide bandwidth, low power, low differential phase and gain error, and excellent gain flatness make the MAX4180–MAX4187 ideal for use in portable video equipment such as cameras, video switchers, and other battery-powered applications. Their two-stage design provides higher gain and lower distortion than conventional single-stage, current-feedback topolo­gies. This feature, combined with fast settling time, makes these devices suitable for buffering high-speed analog-to-digital converters (ADCs).
The MAX4180/MAX4181/MAX4183/MAX4185 have a low-power shutdown mode that is activated by driving the amplifiersSHDN input low. Placing them in shut­down reduces quiescent supply current to 135µA (typ) and places amplifier outputs in a high-impedance state. These amplifiers can be used to implement a high-speed multiplexer by connecting together the out­puts of multiple amplifiers and controlling the SHDN inputs to enable one amplifier and disable all the oth­ers. The disabled amplifiers present very little load (0.1µA leakage current and 4pF capacitance) to the active amplifiers output. Note that the feedback net­work impedance of all the disabled amplifiers must be considered when calculating the total load on the active amplifier output.
Application Information
Theory of Operation
The MAX4180–MAX4187 are current-feedback ampli­fiers, and their open-loop transfer function is expressed as a transimpedance, ∆V
OUT
/IIN, or TZ. The frequency
behavior of the open-loop transimpedance is similar to the open-loop gain of a voltage-mode feedback amplifier. That is, it has a large DC value and decreas­es at approximately 6dB per octave.
Analyzing the follower with gain, as shown in Figure 1, yields the following transfer function:
V
OUT
/ VIN= G x [(TZ(S) / TZ(s) + G x (RIN+ RF)]
where G = A
VCL
= 1 + (RF/ RG), and RIN= 1 /gM≅ 160Ω.
At low gains, G x RIN< RF. Therefore, the closed-loop bandwidth is essentially independent of closed-loop gain. Similarly, TZ> RFat low frequencies, so that:
Layout and Power-Supply Bypassing
The MAX4180–MAX4187 have an RF bandwidth and, consequently, require careful board layout, including the possible use of constant-impedance microstrip or stripline techniques.
To realize the full AC performance of these high-speed amplifiers, pay careful attention to power-supply bypass­ing and board layout. The PC board should have at least two layers: a signal and power layer on one side, and a large, low-impedance ground plane on the other side. The ground plane should be as free of voids as possible. With multilayer boards, locate the ground plane on a layer that incorporates no signal or power traces.
Regardless of whether a constant-impedance board is used, observe the following guidelines when designing the board:
Do not use wire-wrap boards. They are too inductive.
Do not use breadboards. They are too capacitive.
Do not use IC sockets. They increase parasitic ca-
pacitance and inductance.
Use surface-mount components rather than through­hole components. They give better high-frequency performance, have shorter leads, and have lower parasitic reactances.
Figure 1. Current-Feedback Amplifier
V
OUT
( / )==+GRR
V
IN
1
FG
R
G
R
F
R
IN
T
+1
V
IN
2
+1
MAX4180–MAX4187
V
OUT
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
16 ______________________________________________________________________________________
Keep lines as short and as straight as possible.
Do not make 90° turns; round all corners.
Observe high-frequency bypassing techniques to
maintain the amplifiers accuracy. The bypass cap­acitors should include a 0.01µF to 0.1µF ceramic capacitor between each supply pin and the ground plane, located as close to the package as possible.
Place a 1µF ceramic capacitor in parallel with each
0.01µF to 0.1µF capacitor as close to them as possible.
Place a 10µF to 15µF low-ESR tantalum at the point of entry to the power-supply pins PC board. The power-supply trace should lead directly from the tantalum capacitor to the VCCand VEEpins.
Keep PC traces short and use surface-mount com­ponents to minimize parasitic inductance.
Maxim’s High-Speed Evaluation Board
Figures 2 and 3 show layouts of Maxims high-speed single SOT23 and SO evaluation boards. These boards were developed using the techniques described above. The smallest available surface-mount resistors were used for feedback and back-termination to minimize their distance from the part, reducing the capacitance associated with longer lead lengths.
SMA connectors were used for best high-frequency performance. Because distances are extremely short, performance is unaffected by the fact that inputs and outputs do not match a 50line. However, in applica­tions that require lead lengths greater than one-quarter of the wavelength of the highest frequency of interest, use constant-impedance traces.
Fully assembled evaluation boards are available for the MAX4180ESA.
Figure 2a. SOT23 High-Speed EV Board Component Placement Guide— Component Side
Figure 2b. SOT23 High-Speed EV Board Layout—Component Side
Figure 2c. High-Speed EV Board Layout— Solder Side
Figure 3a. SO-8 High-Speed EV Board Component Placement Guide— Component Side
Figure 3b. SO-8 High-Speed EV Board Layout—Component Side
Figure 3c. SO-8 High-Speed EV Board Layout—Solder Side
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 17
Table 1. Recommended Component Values
245
1.2k
1.2k
RL= 1k
190
680
680
RL=
100
-3dB BW (MHz) 190
820
820
RL= 150
RG()
RF()
COMPONENT/BW
76
56
560
RL=
1k/150
AV= +10V/V
205
1k
RL=
150
120 270
2.4k
RL= 1k
130
520
RL=
1k/150
AV= +5V/V
200
560
RL=
100
AV= +2V/V AV= +1V/V
MAX4180 MAX4181
AV= +2V/V
245
1k
1k
RL=
1k
160
MAX4182/MAX4183
620
620
RL=
100
-3dB BW (MHz)
190
680
680
RL=
150
RG()
RF()
COMPONENT/
BW
AV= +2V/V
245
1.1k
1.1k
RL=
1k
175
MAX4186
680
680
RL=
100
190
750
750
RL=
150
AV= +1V/V
270
1.6k
RL=
1k
200
MAX4187
680
RL=
100
205
910
RL=
150
AV= +1V/V
270
1.5k
RL=
1k
180
MAX4184/MAX4185
620
RL=
100
205
750
RL=
150
Choosing Feedback and Gain Resistors
The optimum value of the external-feedback (RF) and gain-setting (RG) resistors used with the MAX4180– MAX4187 depends on the closed-loop gain and the application circuits load. Table 1 lists the optimum resistor values for some specific gain configurations. One-percent resistor values are preferred to maintain consistency over a wide range of production lots. Figures 4a and 4b show the standard inverting and noninverting configurations. Note: The noninverting cir­cuit gain (Figure 4) is 1 plus the magnitude of the inverting closed-loop gain. Otherwise, the two circuits are identical.
DC and Noise Errors
Several major error sources must be considered in any op amp. These apply equally to the MAX4180– MAX4187. Offset-error terms are given by the equation below. Voltage and current-noise errors are root-square summed and are therefore computed separately. In Figure 5, the total output offset voltage is determined by the following factors:
The input offset voltage (V
OS
) times the closed-loop
gain (1 = RF / RG).
The positive input bias current (IB+) times the source resistor (R
S
) (usually 50or 75), plus the negative
input bias current (IB-) times the parallel combination of R
G
and RF. In current-feedback amplifiers, the input bias currents at the IN+ and IN- terminals do not track each other and may have opposite polarity, so there is no benefit to matching the resistance at both inputs.
The equation for the total DC error at the output is:
The total output-referred noise voltage is:
R
V
e
n OUT
IR I R R V
OUT
()+()
+−
BS B F G OS
[]
R
F
|| =+
1
 
R
iR iRR e
()
G
|| =
()
 
+−
nS nFG n()
+
22
+
()
F
+
1
R
G
2
+
()
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
18 ______________________________________________________________________________________
The MAX4180–MAX4187 have a very low, 2nV/Hz noise voltage. The current noise at the positive input (i
n+
) is 4pA/Hz, and the current noise at the inverting
input is 5pA/Hz.
An example of the DC error calculations, using the MAX4180 typical data and typical operating circuit where RF= RG= 1.2kΩ (RF || RG= 600) and RS= 37.5, gives the following:
Calculating the total output noise in a similar manner yields:
With a 200MHz system bandwidth, this calculates to 102µV
RMS
(approximately 612µVp-p, choosing the six-
sigma value).
Video Line Driver
The MAX4180–MAX4187 are well suited to drive coaxi­al transmission lines when the cable is terminated at both ends, as shown in Figure 6. Cable-frequency response can cause variations in the signals flatness. See Table 1 for optimum RFand RGvalues.
Driving Capacitive Loads
The MAX4180–MAX4187 are optimized for AC perfor­mance. They are not designed to drive highly capaci­tive loads. Reactive loads decrease phase margin and may produce excessive ringing and oscillation. Figure 7a shows a circuit that eliminates this problem. Placing the small (usually 5to 22) isolation resistor, RS, before the reactive load prevents ringing and oscillation. At higher capacitive loads, the interaction of the load capacitance and isolation resistor controls AC performance. Figures 7b and 7c show the MAX4180 and MAX4181 frequency response with a 47pF capaci-
e11
4 x 10 x 37.5 5 x 10 x 255
2x10
e 4.8nV/ Hz
n(OUT)
12
2
12
2
9
2
n(OUT)
=+
()
 
 
+
 
 
+
 
 
=
−−
Figure 6. Video Line Driver
Figure 4a. Inverting Gain Configuration
Figure 4b. Noninverting Gain Configuration
Figure 5. Output Offset Voltage
66 3
−−
V 1x10 x37.5 2x10 x 600 1.5x10 x 1 1
V 4.1mV
=+++
OUT
=
OUT
 
 
()
()
R
G
IB-
I
+
B
R
S
R
F
V
MAX4180–MAX4187
OUT
V
IN
R
V
= -(RF / RG) x V
OUT
V
IN
V
= [1+ (RF / RG) V
OUT
R
S
R
T
G
R
F
R
O
MAX4180–MAX4187
IN
R
R
S
R
T
G
R
F
R
O
MAX4180–MAX4187
IN
V
OUT
V
OUT
VIDEO IN
R
820
75CABLE
75
G
R
F
820
+5V
0.1µF
MAX4180
0.1µF
-5V
VIDEO LINE DRIVER
0.1µF
75
75CABLE
75
VIDEO
OUT
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 19
tive load. Note that in each case, gain peaking is substantially reduced when the 20resistor is used to isolate the capacitive load from the amplifier output.
AC Testing/Performance
AC specifications on high-speed amplifiers are usually guaranteed without 100% production testing. Since these high-speed devices are sensitive to external para­sitics introduced when automatic handling equipment is used, it is impractical to guarantee AC parameters through volume production testing. These parasitics are greatly reduced when using the recommended PC board layout (like the Maxim EV kit). Characterizing the part in this way more accurately represents the amplifi­er’s true AC performance. Some manufacturers guaran­tee AC specifications without clearly stating how this guarantee is made. The AC specifications of the MAX4180–MAX4187 are derived through worst-case design simulations combined with a sample characteri­zation of 100 units. The AC performance distributions along with the worst-case simulation results for MAX4180 and MAX4181 are shown in Figures 8–11. These distributions are repeatable provided that the proper board layout and power-supply bypassing are used (see Layout and Power-Supply Bypassing sec­tion).
Figure 7c. Frequency Response with Capacitive Load (With and Without Isolation Resistor)
Figure 7b. Frequency Response with Capacitive Load (With and Without Isolation Resistor)
Figure 7a. Using an Isolation Resistor (RS) for High-Capacitive Loads
R
G
V
IN
R
F
R
S
C
L
R
L
6
MAX4180
5
= 20mVp-p
V
IN
= +2V/V
A
4
V
= RG = 1.2k
R
F
3
= 1k|| 47pF
R
L
2
1
0
-1
NORMALIZED GAIN (dB)
-2
-3
-4 1 10 100 1000
RS = 20
FREQUENCY (MHz)
RS = 0
6
MAX4181
5
= 20mVp-p
V
IN
= +1V/V
A
V
4
= 2.4k
R
F
3
= 1k|| 47pF
R
L
2
1
GAIN (dB)
0
-1
-2
-3
-4 1 10 100 1000
RS = 20
FREQUENCY (MHz)
RS = 0
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
20 ______________________________________________________________________________________
Figure 8d. MAX4180 Falling-Edge Slew-Rate Distribution (Dual Supplies)
Figure 8c. MAX4180 Rising-Edge Slew-Rate Distribution (Dual Supplies)
Figure 9a. MAX4180 -3dB Bandwidth Distribution (Single Supply)
Figure 9b. MAX4180 ±0.1dB Bandwidth Distribution (Single Supply)
Figure 8a. MAX4180 -3dB Bandwidth Distribution (Dual Supplies)
Figure 8b. MAX4180 ±0.1dB Bandwidth Distribution (Dual Supplies)
60
50
40
30
NUMBER OF UNITS
20
10
0
100 130 145115 160 175 190 205 220 235 250 265 280 295 310 315 330 345
SIMULATION
LOWER LIMIT
-3dB BANDWIDTH (MHz)
VS = ±5V
= 20mVp-p
V
IN
= +2V/V
A
V
= 1k
R
L
100 UNITS
80
70
60
50
40
30
NUMBER OF UNITS
20
10
0
300 320 330310 340 350 360 370 380 390 400 410 420 430 440
SIMULATION
LOWER LIMIT
RISING-EDGE SLEW RATE (V/µs)
VS = ±5V
= 2V STEP
V
OUT
= +2V/V
A
V
= 1k
R
L
100 UNITS
25
MAX4180 FIG.8a
20
15
10
NUMBER OF UNITS
5
0
0203010 40 50 60 70 80 90 100 110 120 130 140
SIMULATION
LOWER LIMIT
±0.1dB BANDWIDTH (MHz)
60
VS = ±5V V
OUT
A
V
R
L
100 UNITS
MAX4180 FIG.8c
50
40
30
NUMBER OF UNITS
20
10
0
250 270 280260 290 300 310 320 330 340 350 360 370 380 400390
SIMULATION
LOWER LIMIT
FALLING-EDGE SLEW RATE (V/µs)
= 2V STEP
= +2V/V
= 1k
VS = ±5V
= 20mVp-p
V
IN
= +2V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG.8b
MAX4180 FIG.8d
80
70
60
50
40
30
NUMBER OF UNITS
20
10
0
SIMULATION
LOWER LIMIT
100 130 145115 160 175 190 205 220 235 250 280 310 330265 295 315 345
-3dB BANDWIDTH (MHz)
VS = +5V
= 20mVp-p
V
IN
= +2V/V
A
V
= 1k
R
L
100 UNITS
40
MAX4180 FIG.9a
35
30
25
20
SIMULATION
15
NUMBER OF UNITS
10
5
0
0203010 40 50 60 70 80 90 100 110 120 130 140
LOWER LIMIT
±0.1dB BANDWIDTH (MHz)
VS = +5V
= 20mVp-p
V
IN
= +2V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG.9b
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 21
Figure 9c. MAX4180 Rising-Edge Slew-Rate Distribution (Single Supply)
Figure 9d. MAX4180 Falling-Edge Slew-Rate Distribution (Single Supply)
Figure 10b. MAX4181 ±0.1dB Bandwidth Distribution (Dual Supplies)
Figure 10a. MAX4181 -3dB Bandwidth Distribution (Dual Supplies)
Figure 10c. MAX4181 Rising-Edge Slew-Rate Distribution (Dual Supplies)
Figure 10d. MAX4181 Falling-Edge Slew-Rate Distribution (Dual Supplies)
70
60
50
40
30
NUMBER OF UNITS
20
10
0
SIMULATION
LOWER LIMIT
240 260 270250 340 350 360 370 380 390 400 410 420 430 440
RISING-EDGE SLEW RATE (V/µs)
VS = +5V
= 2V STEP
V
OUT
= +2V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG 9c
60
50
40
30
SIMULATION
NUMBER OF UNITS
20
10
0
LOWER LIMIT
250 270 280260 290 300 310 320 330 340 350 360 370 380 400390
FALLING-EDGE SLEW RATE (V/µs)
VS = +5V
= 2V STEP
V
OUT
= +2V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG.9d
35
30
25
20
15
NUMBER OF UNITS
10
5
0
160 180 190170 200 210 220 230 240 250 260 270 280
SIMULATION
VS = ±5V V
IN
A
V
R
L
100 UNITS
LOWER LIMIT
-3dB BANDWIDTH (MHz)
= 20mVp-p
= +1V/V
= 1k
80
70
60
50
40
30
NUMBER OF UNITS
20
10
0
180 200 210190 220 230 240 250 260 270 280 290 310300
RISING-EDGE SLEW RATE (V/µs)
SIMULATION
LOWER LIMIT
VS = ±5V
= 2V STEP
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
18
16
MAX4180 FIG 10a
14
12
10
8
NUMBER OF UNITS
6
4
2
0
SIMULATION
LOWER LIMIT
0203010 40 50 60 70 80 90 100 110 120
±0.1dB BANDWIDTH (MHz)
60
MAX4180 FIG 10c
50
40
30
NUMBER OF UNITS
20
10
0
140 160 170150 180 190 200 210 220 230 240 250 270260
SIMULATION
LOWER LIMIT
FALLING-EDGE SLEW RATE (V/µs)
VS = ±5V
= 20mVp-p
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
VS = ±5V
= 2V STEP
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG 10a
MAX4180 FIG 10d
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
22 ______________________________________________________________________________________
Figure 11d. MAX4181 Falling-Edge Slew-Rate Distribution (Single Supply)
Figure 11c. MAX4181 Rising-Edge Slew-Rate Distribution (Single Supply)
Figure 11a. MAX4181 -3dB Bandwidth Distribution (Single Supply)
Figure 11b. MAX4181 ±0.1dB Bandwidth Distribution (Single Supply)
50
40
30
20
NUMBER OF UNITS
10
SIMULATION
LOWER LIMIT
0
160 180 190170 200 210 220 230 240 250 260 270 280
-3dB BANDWIDTH (MHz)
80
70
60
50
40
30
NUMBER OF UNITS
20
10
0
180 200 210190 220 230 240 250 260 270 280 300 310
SIMULATION
LOWER LIMIT
RISING-EDGE SLEW RATE (V/µs)
VS = +5V
= 20mVp-p
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
VS = +5V
= 2V STEP
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
290
30
MAX4180 FIG 11a
MAX4180 FIG 11c
25
20
15
NUMBER OF UNITS
10
5
0
100
90
80
70
60
50
40
NUMBER OF UNITS
30
20
10
0
SIMULATION
LOWER LIMIT
0203010 40 50 60 70 80 90 100 110 120
140 160 170150 180 190 200 210 220 230 240 250 270260
±0.1dB BANDWIDTH (MHz)
SIMULATION
LOWER LIMIT
FALLING-EDGE SLEW RATE (V/µs)
VS = +5V
= 20mVp-p
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
VS = +5V
= 2V STEP
V
IN
= +1V/V
A
V
= 1k
R
L
100 UNITS
MAX4180 FIG 11b
MAX4180 FIG 11d
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 23
Pin Configurations (continued)
TOP VIEW
N.C.
IN+
V
OUTA
INA-
INA+
N.C.
SHDNA
SINGLE
1
IN-
2
MAX4180 MAX4181
3
4
EE
87SHDN
V
CC
6
OUT
5
N.C.
OUTA
INA-
INA+
V
EE
SO
DUAL
1
2
3
MAX4183 MAX4185
4
EE
5
6
7
14
V
CC
13
OUTB
12
INB-
11
INB+V
10
N.C.
9
SHDNB
N.C.N.C.
8
OUTA
INA-
INA+
V
INB+
INB-
CC
DUAL
1
2
87V
CC
OUTB
MAX4182 MAX4184
3
4
6
INB-
5
INB+
SO
QUAD
1
2
3
MAX4186 MAX4187
4
5
6
7
14
OUTD
13
IND-
12
IND+
11
V
EE
10
INC+
9
INC-
OUTCOUTB
8
SO
SO
DUAL QUAD
OUTA
INA-
INA+
1
1
2
MAX4183
3
MAX4185
4
EE
5
10
V
CC
9
OUTB
INB-
8
7
INB+V
6
SHDNBSHDNA
µMAX
OUTA OUTD
2
INA-
3
4
5
6
7
8
MAX4186 MAX4187
INA+
V
INB+
INB-
OUTB
N.C.
CC
16
15
IND-
14
IND+
13
V
EE
12
INC+
INC-
11
10
OUTC
9
N.C.
QSOP
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23, Current-Feedback Amplifiers with Shutdown
Chip Information
MAX4180/MAX4181 TRANSISTOR COUNT: 83 SUBSTRATE CONNECTED TO V
EE
MAX4182–MAX4185 TRANSISTOR COUNT: 166 SUBSTRATE CONNECTED TO V
EE
MAX4186/MAX4187 TRANSISTOR COUNT: 235 SUBSTRATE CONNECTED TO V
EE
Package Information
Ordering Information (continued)
AAAC
TOP
MARK
16 QSOP-40°C to +85°CMAX4187EEE
14 SO-40°C to +85°C
MAX4187ESD
16 QSOP-40°C to +85°CMAX4186EEE
14 SO-40°C to +85°C
MAX4186ESD
14 SO-40°C to +85°CMAX4185ESD
10 µMAX*-40°C to +85°C
MAX4185EUB
8 SO-40°C to +85°C
MAX4184ESA
14 SO-40°C to +85°CMAX4183ESD
10 µMAX*-40°C to +85°C
MAX4183EUB
8 SO
8 SO
6 SOT23-6
PIN­PACKAGE
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MAX4182ESA
MAX4181ESA
MAX4181EUT-T
PART
*Contact factory for availability.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
6LSOT.EPS
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