intersil ISL28138, ISL28238 DATA SHEET
®
ISL28138, ISL28238
Data Sheet June 28, 2007
4.5MHz, Single and Dual Precision Rail-toRail Input-Output (RRIO) Op Amps with
Very Low Input Bias Current
The ISL28138 and ISL28238 are 4.5MHz low-power single
and dual operational amplifiers. The parts are optimized for
single supply operation from 2.4V to 5.5V, allowing operation
from one lithium cell or two Ni-Cd batteries.
The parts feature an Input Range Enhancement Circuit
(IREC) which enables them to maintain CMRR performance
for input voltages greater than the positive supply. The input
signal is capable of swinging 0.25V above the positive
supply and to 100mV below the negative supply with only a
slight degradation of the CMRR performance. The output
operation is rail-to-rail.
The parts draw minimal supply current (900µA per amplifier)
while meeting excellent DC accuracy, AC performance,
noise and output drive specifications. The ISL28138 features
an enable pin that can be used to turn the device off and
reduce the supply current to less than 20µA. Operation is
guaranteed over -40°C to +125°C temperature range
Ordering Information
PART NUMBER
(Note)
ISL28138FHZ-T7* GABR 6 Ld SOT-23 MDP0038
ISL28138FHZ-T7A* GABR 6 Ld SOT-23 MDP0038
ISL28138FBZ 28138FBZ 8Ld SO MDP0027
ISL28138FBZ-T7* 28138FBZ 8Ld SO MDP0027
Coming Soon
ISL28238FAZ-T7*
Coming Soon
ISL28238FAZ-T7*
* “-T7” and “-T7A” suffix is for tape and reel. Please refer to TB347
for details on reel specifications.
NOTE: Intersil Pb-free plus anneal products employ special
Pb-free material sets; molding compounds/die attach materials and
100% matte tin plate termination finish, which are RoHS compliant
and compatible with both SnPb and Pb-free soldering operations.
Intersil Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
PART
MARKING
PACKAGE
(Pb-Free) PKG. DWG. #
8Ld SO MDP0027
8Ld MSOP MDP0043
FN6336.1
Features
• 4.5MHz gain bandwidth product
• 900µA supply current (per amplifier)
• 300µV maximum offset voltage
• 1pA typical input bias current
• Down to 2.4V single supply voltage range
• Rail-to-rail input and output
• Output sources and sinks 60mA load current
• Enable pin (ISL28138)
• -40°C to +125°C operation
• Pb-free plus anneal available (RoHS compliant)
Applications
• Low-end audio
• 4mA - 20mA current loops
• Medical devices
• Sensor amplifiers
• ADC buffers
• DAC output amplifiers
Pinouts
ISL28138
(8 LD SO)
TOP VIEW
1
2
-
+
3
V- NC
4
ISL28238
(8 LD MSOP)
TOP VIEW
1
OUT
OUT_A
(6 LD SOT-23)
1
V-
2
IN+
3
1
ISL28138
TOP VIEW
+-
ISL28238
(8 LD SO)
TOP VIEW
6
V+
EN
5
4
IN-
8
V+
NC
IN-
IN+
OUT_A
8
EN
7
V+
OUT
6
5
8
V+
IN-_A
IN-_A
2
+-
IN+_A
3
V- IN+_B
4
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
All other trademarks mentioned are the property of their respective owners.
+-
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2007. All Rights Reserved.
7
6
5
OUT_B
IN-_B
2
+-
IN+_A
3
V- IN+_B
4
+-
7
6
5
OUT_B
IN-_B
ISL28138, ISL28238
Absolute Maximum Ratings (T
Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/μs
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . V-
ESD Tolerance
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
= +25°C) Thermal Information
A
Thermal Resistance θ
6 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . . 230
8 Ld SO Package . . . . . . . . . . . . . . . . . . . . . . . . . . 110
- 0.5V to V+ + 0.5V
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . . 115
Output Short-Circuit Duration . . . . . . . . . . . . . . . . . . . . . . .Indefinite
Ambient Operating Temperature Range . . . . . . . . .-40°C to +125°C
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +150°C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . +125°C
(°C/W)
JA
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = T
Electrical Specifications V+ = 5V, V- = 0V,V
= 2.5V, RL = Open, TA = +25°C unless otherwise specified.
CM
A
Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization.
PARAMETER DESCRIPTION CONDITIONS
V
OS
Input Offset Voltage 8 Ld SO -300
6 Ld SOT-23 -550
ΔV
OS
--------------- -
ΔT
I
OS
I
B
Input Offset Voltage vs Temperature 8 Ld SO 0.6 µV/°C
Input Offset Current
T
= -40°C to +85°C
A
Input Bias Current
T
= -40°C to +85°C
A
MIN
(Note 1) TYP
-650
-750
-35
-80
-30
-80
MAX
(Note 1) UNIT
±6 300
650
±6 550
750
±535
80
±130
80
µV
µV
pA
pA
CMIR Common-Mode Voltage Range Guaranteed by CMRR 05V
CMRR Common-Mode Rejection Ratio V
= 0V to 5V 75
CM
98 dB
70
PSRR Power Supply Rejection Ratio V
A
V
VOL
OUT
Large Signal Voltage Gain VO = 0.5V to 4.5V, RL = 100kΩ to V
Maximum Output Voltage Swing Output low, RL = 100kΩ to V
= 2.4V to 5.5V 80
+
CM
V
= 0.5V to 4.5V, RL = 1kΩ to V
O
CM
CM
75
200
150
98 dB
580 V/mV
50 V/mV
368mV
I
S,ON
I
S,OFF
Output low, R
= 1kΩ to V
L
CM
50 70
110
Output high, R
Output high, R
Supply Current, Enabled 0.7
= 100kΩ to V
L
= 1kΩ to V
L
CM
CM
4.994
4.99
4.93
4.89
0.4
4.998 V
4.95 V
0.9 1.1
1.4
Supply Current, Disabled (ISL28138) 10 14
16
2
mV
mA
µA
FN6336.1
June 28, 2007
ISL28138, ISL28238
Electrical Specifications V+ = 5V, V- = 0V,V
= 2.5V, RL = Open, TA = +25°C unless otherwise specified.
CM
Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization.
MIN
PARAMETER DESCRIPTION CONDITIONS
(Note 1) TYP
IO+ Short-Circuit Output Source Current RL = 10Ω 48
45
- Short-Circuit Output Sink Current RL = 10Ω 50
I
O
V
SUPPLY
V
ENH
V
ENL
I
ENH
I
ENL
Supply Operating Range V+ to V-, Guararteed by PSRR 2.4 5.5 V
EN Pin High Level (ISL28138) 2 V
EN Pin Low Level(ISL28138) 0.8 V
EN Pin Input High Curren (ISL28138) V
EN Pin Input Low Current (ISL28138) V
= V+ 1 1.5
EN
= V- 12 25
EN
45
AC SPECIFICATONS
GBW Gain Bandwidth Product A
Unity Gain
-3dB Bandwidth A
Bandwidth
e
N
Input Noise Voltage Peak-to-Peak f = 0.1Hz to 10Hz 2 µV
= 100, RF = 100kΩ, RG = 1kΩ,
V
R
= 10kΩ to V
L
=1, RF = 0Ω, V
V
R
= 10kΩ to V
L
CM
CM
OUT
= 10mV
P-P
,
Input Noise Voltage Density fO = 1kHz 26 nV/√Hz
i
N
CMRR @ 60Hz Input Common Mode Rejection Ratio V
PSRR- @
120Hz
PSRR+ @
120Hz
Input Noise Current Density fO = 1kHz 0.12 pA/√Hz
= 1V
, RL = 10kΩ to V
P-P
= 1V
= 1V
, RL = 10kΩ to V
P-P
, RL = 10kΩ to V
P-P
CM
CM
CM
Power Supply Rejection Ratio (V-) V
Power Supply Rejection Ratio (V+) V
CM
, V- = ±1.2V and ±2.5V,
+
V
SOURCE
, V- = ±1.2V and ±2.5V
+
V
SOURCE
TRANSIENT RESPONSE
SR Slew Rate
t
, tf, Large
r
Signal
, tf, Small
t
r
Signal
t
EN
Rise Time, 10% to 90%, V
Fall Time, 90% to 10%, V
Rise Time, 10% to 90%, V
Fall Time, 90% to 10%, V
OUT
OUT
OUT
OUT
Enable to Output Turn-on Delay Time, 10%
EN
to 10% V
, (ISL28138)
OUT
Enable to Output Turn-off Delay Time, 10%
EN
to 10% V
, (ISL28138)
OUT
AV = +2
,
V
= 3V
R
L
AV = +2
R
L
AV = +2
R
G
AV = +2
R
G
OUT
= 10
kΩ to V
,
V
OUT
= 10
kΩ to V
,
V
OUT
= RF = RL = 10
,
V
OUT
= RF = RL = 10
P-P
CM
= 3V
P-P
CM
= 10mV
kΩ to V
= 10mV
kΩ to V
VEN = 5V to 0V, AV = +2,
R
= RF = RL = 1
G
k to V
VEN = 0V to 5V, AV = +2,
R
= RF = RL = 1k
G
to V
, RG = RF =
, RG = RF =
,
P-P
CM
,
P-P
CM
CM
CM
10k
10k
Ω
Ω
NOTE:
1. Parts are 100% tested at +25°C. Over temperature limits established by characterization and are not production tested.
MAX
(Note 1) UNIT
75 mA
68 mA
µA
1.6
nA
30
4.5 MHz
13 MHz
P-P
85 dB
-82 dB
-100 dB
±4.8 V/µs
530 ns
530 ns
50 ns
50 ns
5µs
0.2 µs
3
FN6336.1
June 28, 2007
ISL28138, ISL28238
Typical Performance Curves V+ = 5V, V- = 0V,V
15
10
5
0
V+ = 5V
-5
= 1k
R
L
CL = 16.3pF
NORMALIZED GAIN (dB)
-10
= +2
A
V
V
= 10mV
OUT
-15
100 1k 10k 100k 1M 10M 100M
FIGURE 1. GAIN vs FREQUENCY vs FEEDBACK RESISTOR
VALUES R
1
0
-1
-2
-3
-4
-5
-6
V+ = 5V
= 10k
R
-7
L
NORMALIZED GAIN (dB)
= 16.3pF
C
L
-8
A
= +1
V
-9
1k 10k 100k 1M 10M 100M
FIGURE 3. GAIN vs FREQUENCY vs V
Rf = Rg = 100k
P-P
FREQUENCY (Hz)
f/Rg
V
OUT
V
OUT
V
OUT
V
OUT
FREQUENCY (Hz)
Rf = Rg = 1k
= 100mV
= 50mV
= 10mV
= 1V
Rf = Rg = 10k
, RL = 10k
OUT
= 2.5V, RL = Open, unless otherwise specified.
CM
1
0
-1
-2
-3
-4
-5
-6
V+ = 5V
= 1k
R
-7
L
NORMALIZED GAIN (dB)
= 16.3pF
C
L
-8
A
= +1
V
-9
1k 10k 100k 1M 10M 100M
V
OUT
V
OUT
V
OUT
V
OUT
FREQUENCY (Hz)
FIGURE 2. GAIN vs FREQUENCY vs V
1
0
-1
-2
-3
-4
-5
-6
V+ = 5V
= 100k
R
L
-7
NORMALIZED GAIN (dB)
= 16.3pF
C
L
-8
= +1
A
V
-9
1k 10k 100k 1M 10M 100M
V
OUT
V
OUT
V
OUT
V
OUT
FREQUENCY (Hz)
FIGURE 4. GAIN vs FREQUENCY vs V
= 100mV
= 50mV
= 10mV
= 1V
= 100mV
= 50mV
= 10mV
= 1V
OUT, RL
, RL = 100k
OUT
= 1k
1
0
-1
-2
-3
-4
-5
-6
V+ = 5V
= 10mV
V
-7
OUT
NORMALIZED GAIN (dB)
= 16.3pF
C
L
-8
AV = +1
-9
1k 10k 100k 1M 10M 100M
P-P
FIGURE 5. GAIN vs FREQUENCY vs R
RL = 1k
RL = 10k
RL = 100k
FREQUENCY (Hz)
L
4
GAIN (dB)
70
60
50
40
30
20
10
0
-10
AV = 1001
AV = 101
A
AV = 1
100
= 10
V
1k 10k 100k 1M 10M 100M
AV = 1, Rg = INF, Rf = 0
A
= 10, Rg = 1k, Rf = 9.09k
V
= 101, Rg = 1k, Rf = 100k
A
V
A
= 1001, Rg = 1k, Rf = 1M
V
FREQUENCY (Hz)
V+ = 5V
CL = 16.3pF
= 10k
R
L
= 10mV
V
OUT
P-P
FIGURE 6. FREQUENCY RESPONSE vs CLOSED LOOP GAIN
FN6336.1
June 28, 2007
ISL28138, ISL28238
Typical Performance Curves V+ = 5V, V- = 0V,V
1
0
-1
-2
-3
-4
-5
RL = 10k
-6
CL = 16.3pF
-7
NORMALIZED GAIN (dB)
A
= +1
V
-8
V
= 10mV
OUT
-9
10k 100k 1M 10M 100M
V+ = 2.4V
P-P
FREQUENCY (Hz)
FIGURE 7. GAIN vs FREQUENCY vs SUPPLY VOLTAGE
10
0
-10
-20
-30
-40
-50
CMRR (dB)
-60
-70
-80
-90
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
FIGURE 9. CMRR vs FREQUENCY; V+ = 2.4V AND 5V
V+ = 5V
V+ = 2.4V, 5V
= 1k
R
L
CL = 16.3pF
A
= +1
V
= 1V
V
CM
P-P
= 2.5V, RL = Open, unless otherwise specified. (Continued)
CM
8
7
6
5
4
3
2
1
0
-1
-2
-3
V
= 5V
+
-4
R
= 1k
L
NORMALIZED GAIN (dB)
-5
A
= +1
V
-6
V
= 10mV
OUT
-7
-8
10k 100k 1M 10M 100M
CL = 51.7pF
CL = 43.7pF
CL = 37.7pF
CL = 26.7pF
CL = 16.7pF
CL = 4.7pF
P-P
FREQUENCY (Hz)
FIGURE 8. GAIN vs FREQUENCY vs C
20
0
-20
-40
-60
PSRR (dB)
-80
-100
-120
100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
PSRR-
PSRR+
FIGURE 10. PSRR vs FREQUENCY, V
L
V+, V- = ±1.2V
= 1k
R
L
CL = 16.3pF
A
= +1
V
= 1V
V
CM
, V- = ±1.2V
+
P-P
20
0
-20
-40
-60
PSRR (dB)
-80
-100
-120
100 1k 10k 100k 1M 10M
FIGURE 11. PSRR vs FREQUENCYV, V
PSRR-
PSRR+
FREQUENCY (Hz)
V+, V- = ±2.5V
= 1k
R
L
CL = 16.3pF
= +1
A
V
V
= 1V
CM
, V- = ±2.5V
+
5
P-P
1k
V+ = 5V
= 1k
R
L
= 16.3pF
C
L
A
= +1
V
100
INPUT VOLTAGE NOISE (nV/√Hz)
10
1 10 100 1k 10k 100k
FREQUENCY (Hz)
FIGURE 12. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY
FN6336.1
June 28, 2007
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