The MAX4380–MAX4384 family of op amps are unitygain-stable devices that combine high-speed performance, Rail-to-Rail
®
outputs, and high-impedance
disable mode. These devices operate from a +4.5V to
+11V single supply or from ±2.25V to ±5.5V dual supplies. The common-mode input voltage range extends
beyond the negative power-supply rail (ground in single-supply applications).
The MAX4380–MAX4384 require only 5.5mA of quiescent supply current per op amp while achieving a
210MHz -3dB bandwidth, 55MHz 0.1dB gain flatness
and a 485V/µs slew rate. These devices are an excellent solution in low-power/low-voltage systems that
require wide bandwidth, such as video, communications, and instrumentation.
The MAX4380 single with disable is available in an ultrasmall 6-pin SC70 package.
Applications
Set-Top Boxes
Surveillance Video Systems
Battery-Powered Instruments
Analog-to-Digital Converter Interface
CCD Imaging Systems
Video Routing and Switching Systems
Digital Cameras
Video-on-Demand
Video Line Driver
Features
♦ Low Cost and High Speed:
210MHz -3dB Bandwidth
55MHz 0.1dB Gain Flatness
485V/µs Slew Rate
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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 at 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.
DC ELECTRICAL CHARACTERISTICS–Single Supply
(VCC= +5V, VEE= 0, VCM= VCC/2, V
OUT
= VCC/2, RL= ∞ to VCC/2, DISABLE_ = VCC(MAX4380/MAX4381/MAX4382/MAX4384),
T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Common-Mode Voltage
Range
Input Offset Voltage
Input Offset Voltage MatchingMAX4381–MAX43841mV
Input Offset Voltage Tempco
Input Bias Current
Input Offset Current
Input Resistance
TC
V
CM
V
OS
VOS
I
B
I
OS
R
IN
Guaranteed by CMRR
TA = +25°C
TA = -40°C to +85°C
Differential mode (-1V ≤ V
Common mode (-0.2V ≤ VCM ≤ +2.75V)3MΩ
AC ELECTRICAL CHARACTERISTICS–Single Supply (continued)
(VCC= +5V, VEE= 0, VCM= +1.5V, RL= 100Ω to VCC/2, DISABLE_ = VCC(MAX4380/MAX4381/MAX4382/MAX4384),
V
OUT
= VCC/2, A
VCL
= +1V/V, TA= +25°C, unless otherwise noted.)
Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2: PSRR for single +5V supply tested with V
EE
= 0, VCC= +4.5V to +5.5V; PSRR for dual ±5V supply tested with VEE= -4.5V
to -5.5V, V
CC
= +4.5V to +5.5V.
4
-6
100k10M100M1M1G
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4380-84 toc01
FREQUENCY (Hz)
GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
V
OUT
= 100mVp-p
4
-6
100k10M100M1M1G
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4380-84 toc02
FREQUENCY (Hz)
GAIN (dB)
-5
-4
-3
-2
-1
0
1
2
3
V
OUT
= 2Vp-p
0.4
-0.6
100k10M100M1M1G
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4380-84 toc03
FREQUENCY (Hz)
GAIN (dB)
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
V
OUT
= 100mVp-p
Typical Operating Characteristics
(VCC= +5V, VEE= 0, VCM= +1.5V, A
VCL
= +1V/V, RL= 100Ω to VCC/2, TA = +25°C, unless otherwise noted.)
The MAX4380–MAX4384 are single-supply, rail-to-rail,
voltage-feedback amplifiers that employ current-feedback techniques to achieve 485V/µs slew rates and
210MHz bandwidths. Excellent harmonic distortion and
differential gain/phase performance make these amplifiers an ideal choice for a wide variety of video and RF
signal-processing applications.
Applications Information
The output voltage swings to within 50mV of each supply rail. Local feedback around the output stage
ensures low open-loop output impedance to reduce
gain sensitivity to load variations. The input stage permits common-mode voltages beyond the negative supply and to within 2.25V of the positive supply rail.
Choosing Resistor Values
Unity-Gain Configuration
The MAX4380–MAX4384 are internally compensated
for unity gain. When configured for unity gain, a 24Ω
resistor (RF) in series with the feedback path optimizes
AC performance. This resistor improves AC response
by reducing the Q of the parallel LC circuit formed by
the parasitic feedback capacitance and inductance.
Video Line Driver
The MAX4380–MAX4384 are low-power, voltage-feedback amplifiers featuring bandwidths up to 210MHz,
0.1dB gain flatness to 55MHz. They are designed to
minimize differential-gain error and differential-phase
error to 0.02% and 0.08 degrees respectively. They
Pin Description (continued)
PIN
MAX4380MAX4381MAX4382MAX4383MAX4384
SC70/SOT23µMAXQSOPSO/TSSOPSO/TSSOP SO/QSOPTSSOP
—8119667INB-
—9108778OUTBAmplifier B Output
—63 3 —— 9DISABLEB
——1412101215INC+
——151391114INC-
——161481013OUTCAmplifier C Output
——22 —— 12DISABLEC
————121417IND+
————131518IND-
————141619OUTDAmplifier D Output
— ——— ——20DISABLED
NAMEFUNCTION
Am pl i fier B
Inver ting Inp ut
Shutdown Amplifier B.
C onnect to V
E nab l e.
Amplifier C
Noninverting Input
Amplifier C
Inverting Input
Shutdown Amplifier C.
C onnect to V
E nab l e.
Amplifier D
Noninverting Input
Amplifier D Inverting
Input
Shutdown Amplifier D.
C onnect to V CC to
E nab l e.
have a 16ns settling time to 0.1%, 485V/µs slew rates,
and output-current-drive capability of up to 75mA
making them ideal for driving video loads.
Inverting and Noninverting Configurations
Select the gain-setting feedback (R
F
) and input (RG)
resistor values to fit your application. Large resistor values increase voltage noise and interact with the amplifier’s input and PC board capacitance. This can
generate undesirable poles and zeros and decrease
bandwidth or cause oscillations. For example, a noninverting gain-of-two configuration (RF= RG) using 1kΩ
resistors, combined with 1pF of amplifier input capacitance and 1pF of PC board capacitance, causes a
pole at 159MHz. Since this pole is within the amplifier
bandwidth, it jeopardizes stability. Reducing the 1kΩ
resistors to 100Ω extends the pole frequency to
1.59GHz, but could limit output swing by adding 200Ω
in parallel with the amplifier’s load resistor
(Figures 1a and 1b).
Layout and Power-Supply Bypassing
These amplifiers operate from a single +4.5V to +11V
power supply or from dual ±2.25V to ±5.5V supplies. For
single-supply operation, bypass VCCto ground with a
0.1µF capacitor as close to the pin as possible. If operating with dual supplies, bypass each supply with a 0.1µF
capacitor.
Maxim recommends using microstrip and stripline
techniques to obtain full bandwidth. To ensure that the
PC board does not degrade the amplifier’s performance, design it for a frequency greater than 1GHz.
Pay careful attention to inputs and outputs to avoid
large parasitic capacitance. Whether or not you use a
constant-impedance board, observe the following
design guidelines:
• Don’t use wire-wrap boards; they are too inductive.
• Don’t use IC sockets; they increase parasitic capaci-
tance and inductance.
• Use surface-mount instead of through-hole components for better high-frequency performance.
• Use a PC board with at least two layers; it should be
as free from voids as possible.
• Keep signal lines as short and as straight as possible. Do not make 90° turns; round all corners.
Rail-to-Rail Outputs,
Ground-Sensing Inputs
For +5V single-supply operation, the input commonmode range extends from (VEE- 200mV) to (V
CC
- 2.25V) with excellent common-mode rejection.
Beyond this range, the amplifier output is a nonlinear
function of the input, but does not undergo phase
reversal or latchup.
For ±5V dual-supply operation, the common-mode
range is from VEEto (VCC- 2.25V)
For +5V single-supply operation the output swings to
within 50mV of either power-supply rail with a 2kΩ
load. The input ground sensing and the rail-to-rail output substantially increase the dynamic range. With a
symmetric input in a single +5V application, the input
can swing 2.95Vp-p and the output can swing 4.9Vp-p
with minimal distortion.
Low-Power Disable Mode
The disable feature (DISABLE_) allows the amplifier to
be placed in a low-power, high-output-impedance
state. When the disable pin (DISABLE_) is active, the
amplifier’s output impedance is 35kΩ. This high resistance and the low 2pF output capacitance make the
MAX4380–MAX4382 and the MAX4384 ideal in
RF/video multiplexer or switch applications. For larger
arrays, pay careful attention to capacitive loading.
Refer to the Output Capacitive Loading and Stability
section.
Figure 1b. Inverting Gain Configuration
Figure 1a. Noninverting Gain Configuration
MAX438 _
MAX438 _
V
R
F
V
OUT
R
F
= -(RF / RG) V
OUT
V
OUT
= [1+ (RF / RG)] V
V
OUT
IN
IN
R
G
IN
R
IN
G
MAX4380–MAX4384
Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs and Disable
The MAX4380–MAX4384 are optimized for AC performance. They are not designed to drive highly reactive
loads, which decrease phase margin and may produce
excessive ringing and oscillation. Figure 2 shows a circuit that eliminates this problem. Figure 3 is a graph of
the Optimal Isolation Resistor (RS) vs. Capacitive Load.
Figure 4 shows how a capacitive load causes excessive peaking of the amplifier’s frequency response if
the capacitor is not isolated from the amplifier by a
resistor. A small isolation resistor (usually 10Ω to 15Ω)
placed before the reactive load prevents ringing and
oscillation. At higher capacitive loads, AC performance
is controlled by the interaction of the load capacitance
and the isolation resistor. Figure 5 shows the effect of a
15Ω isolation resistor on closed-loop response.
Chip Information
MAX4380 TRANSISTOR COUNT: 66
MAX4381 TRANSISTOR COUNT: 132
MAX4382 TRANSISTOR COUNT: 196
MAX4383 TRANSISTOR COUNT: 264
MAX4384 TRANSISTOR COUNT: 264
Figure 4. Small-Signal Gain vs. Frequency with Load
Capacitance and No Isolation Resistor
Figure 5. Small-Signal Gain vs. Frequency with Load
Capacitance and 27Ω Isolation Resistor
Figure 2. Driving a Capacitive Load Through an Isolation Resistor
Figure 3. Isolation Resistance vs. Capacitive Load
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
.)
0.6±0.1
e
10
ÿ 0.50±0.1
1
0.6±0.1
TOP VIEW
D2
A2
D1
FRONT VIEW
4X S
H
BOTTOM VIEW
GAGE PLANE
A
b
α
A1
10
1
E2
E1
L
L1
INCHES
MILLIMETERS
MAX
DIM
MIN
-A
0.002
A1
A2 0.030 0.037 0.75 0.95
0.116
D1
0.114
D2
0.116
E1
0.114
E2
0.187
H
0.0157
L
L1
0.037 REF
0.007
b
e
0.0197 BSC
0.0035
c
0.0196 REF
S
α
0∞0∞6∞
c
0.043
0.006
0.120
0.118
0.120
0.118
0.199
0.0275
0.0106
0.0078
MIN
-
0.05
2.95
2.89
2.95
2.89
4.75
0.40
0.940 REF
0.177
0.500 BSC
0.090
0.498 REF
6∞
MAX
1.10
0.15
3.05
3.00
3.05
3.00
5.05
0.70
0.270
0.200
10LUMAX.EPS
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
21-0061
REV.DOCUMENT CONTROL NO.APPROVAL
1
I
1
INCHES
DIM
MIN
N
HE
1
TOP VIEW
0.053A
0.004
A1
0.014
B
0.007
C
e0.050 BSC1.27 BSC
0.150
E
H0.2440.2285.806.20
0.016L
VARIATIONS:
INCHES
MINDIM
D
0.189 0.197AA5.004.808
0.337 0.344AB8.758.5514
D
MAX
0.069
0.010
0.019
0.010
0.157
0.050
MAX
0.3940.386D
MILLIMETERS
MAX
MIN
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
3.80 4.00
0.40 1.27
MILLIMETERS
MAX
MIN
9.80 10.00
N MS012
16
AC
SOICN .EPS
D
C
L
0∞-8∞
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
21-0041
REV.DOCUMENT CONTROL NO.APPROVAL
1
B
1
e
FRONT VIEW
A
B
A1
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.
16Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-1737-7600
Ultra-Small, Low-Cost, 210MHz, Single-Supply
Op Amps with Rail-to-Rail Outputs and Disable
QSOP.EPS
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
.)
TSSOP4.40mm.EPS
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.