INTERSIL ISL28258FUZ-T7

ISL28158, ISL28258
®
Data Sheet
February 11, 2008
34µA Micro-power Single and Dual
Precision Rail-to-Rail Input-Output (RRIO)
Low Input Bias Current Op Amps
The ISL28158 and ISL28258 are micro-power precision
operational amplifiers optimized for single supply operation
at 5.5V and can operate down to 2.4V.
FN6377.2
Features
• 34µA typical supply current
• 300µV maximum offset voltage (8 Ld SOIC)
• 1pA typical input bias current
• 200kHz gain bandwidth product
These devices 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.
• 2.4V to 5.5V single supply voltage range
The ISL28158 and ISL28258 draw minimal supply current
while meeting excellent DC-accuracy noise and output drive
specifications. Competing devices seriously degrade these
parameters to achieve micro-power supply current. Offset
current, voltage and current noise, slew rate, and gain
bandwidth product are all two to ten times better than on
previous micro-power op amps.
• Battery- or solar-powered systems
The 1/f corner of the voltage noise spectrum is at 100Hz.
This results in low frequency noise performance, which can
only be found on devices with an order of magnitude higher
supply current.
• ADC buffers
ISL28158 and ISL28258 can be operated from one lithium
cell or two Ni-Cd batteries. The input range includes both
positive and negative rail. The output swings to both rails.
Pinouts
ISL28158
(8 LD SOIC)
TOP VIEW
ISL28158
(6 LD SOT-23)
TOP VIEW
OUT 1
V- 2
+ -
IN+ 3
6 V+
NC 1
5 EN
IN- 2
4 IN-
IN+ 3
8 EN
7 V+
+
6 OUT
V- 4
ISL28258
(8 LD MSOP)
TOP VIEW
ISL28258
(8 LD SOIC)
TOP VIEW
OUT_A 1
IN-_A 2
IN+_A 3
V- 4
8 V+
- +
+ -
5 NC
OUT_A 1
7 OUT_B
IN-_A 2
6 IN-_B
IN+_A 3
5 IN+_B
V- 4
1
7 OUT_B
+ -
• Enable pin (ISL28158 only)
• Pb-free (RoHS compliant)
Applications
• 4mA to 20mA current loops
• Handheld consumer products
• Medical devices
• Sensor amplifiers
• DAC output amplifiers
Ordering Information
PART NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL28158FHZ-T7*
GABW
6 Ld SOT-23
MDP0038
ISL28158FHZ-T7A*
GABW
6 Ld SOT-23
MDP0038
ISL28158FBZ
28158 FBZ
8 Ld SOIC
MDP0027
ISL28158FBZ-T7*
28158 FBZ
8 Ld SOIC
MDP0027
Coming Soon
ISL28258FBZ
28258 FBZ
8 Ld SOIC
MDP0027
Coming Soon
ISL28258FBZ-T7*
28258 FBZ
8 Ld SOIC
MDP0027
Coming Soon
ISL28258FUZ
8258Z
8 Ld MSOP
MDP0043
Coming Soon
ISL28258FUZ-T7*
8258Z
8 Ld MSOP
MDP0043
*Please refer to TB347 for details on reel specifications.
8 V+
- +
• Rail-to-rail input and output
6 IN-_B
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
5 IN+_B
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2007, 2008. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
ISL28158, ISL28258
Absolute Maximum Ratings (TA = +25°C)
Thermal Information
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.75V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/µs
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . V- -0.5V to V+ +0.5V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V
Thermal Resistance
θJA (°C/W)
6 Ld SOT-23 Package . . . . . . . . . . . . . . . . . . . . . . .
230
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
110
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
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 = TA
Electrical Specifications
PARAMETER
V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization.
DESCRIPTION
CONDITIONS
MIN
(Note 1)
TYP
MAX
(Note 1)
UNIT
DC SPECIFICATIONS
VOS
Input Offset Voltage
ΔV OS
--------------ΔT
Input Offset Voltage vs Temperature
IOS
Input Offset Current
IB
8 Ld SOIC
-300
-650
3.1
300
650
µV
6 Ld SOT-23
-550
-750
5
550
750
µV
0.3
µV/°C
-35
-80
±5
35
80
pA
TA = -40°C to +85°C
-30
-80
±1
30
80
pA
TA = -40°C to +85°C
5
V
Input Bias Current
VCM
Common-Mode Voltage Range
Guaranteed by CMRR
0
CMRR
Common-Mode Rejection Ratio
VCM = 0V to 5V
75
70
98
dB
PSRR
Power Supply Rejection Ratio
V+ = 2.4V to 5.5V
80
75
98
dB
AVOL
Large Signal Voltage Gain
VO = 0.5V to 4.5V, RL = 100kΩ to VCM
100
75
220
V/mV
VO = 0.5V to 4.5V, RL = 1kΩ to VCM
45
V/mV
Output low, RL = 100kΩ to VCM
5.3
6
20
mV
Output low, RL = 1kΩ to VCM
135
150
250
mV
VOUT
IS,ON
Maximum Output Voltage Swing
Quiescent Supply Current, Enabled
Output high, RL = 100kΩ to VCM
4.995
4.993
4.996
V
Output high, RL = 1kΩ to VCM
4.84
4.77
4.874
V
26
15
34
V+ = 5V
V+ = 2.4V
2
20
43
55
µA
µA
FN6377.2
February 11, 2008
ISL28158, ISL28258
Electrical Specifications
PARAMETER
V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open, TA = +25°C unless otherwise specified.
Boldface limits apply over the operating temperature range, -40°C to +125°C. Temperature data
established by characterization. (Continued)
DESCRIPTION
CONDITIONS
MIN
(Note 1)
TYP
10
MAX
(Note 1)
14
19
UNIT
IS,OFF
Quiescent Supply Current, Disabled
IO+
Short-Circuit Output Source Current
RL = 10Ω to VCM
27
20
30
mA
IO-
Short-Circuit Output Sink Current
RL = 10Ω to VCM
22
15
25
mA
VSUPPLY
Supply Operating Range
V+ to V-
2.4
VENH
EN Pin High Level
VENL
EN Pin Low Level
IENH
EN Pin Input High Current
VEN = V+
IENL
EN Pin Input Low Current
5.5
2
µA
V
V
0.8
V
1
1.5
1.6
µA
VEN = V-
12
25
30
nA
AC SPECIFICATONS
GBW
Gain Bandwidth Product
AV = 100, RF = 100kΩ, RG = 1kΩ,
RL = 10kΩ to VCM
200
kHz
Unity Gain
Bandwidth
-3dB Bandwidth
AV =1, RF = 0Ω, VOUT = 10mVP-P
420
kHz
eN
Input Noise Voltage Peak-to-Peak
f = 0.1Hz to 10Hz
1.4
µVP-P
Input Noise Voltage Density
fO = 1kHz
64
nV/√Hz
iN
Input Noise Current Density
fO = 10kHz
0.19
pA/√Hz
CMRR @ 60Hz
Input Common Mode Rejection Ratio
VCM = 1VP-P, RL = 10kΩ to VCM
-70
dB
PSRR+ @
120Hz
Power Supply Rejection Ratio (V+)
V+, V- = ±1.2V and ±2.5V,
VSOURCE = 1VP-P, RL = 10kΩ to VCM
-64
dB
PSRR- @
120Hz
Power Supply Rejection Ratio (V-)
V+, V- = ±1.2V and ±2.5V
VSOURCE = 1VP-P, RL = 10kΩ to VCM
-85
dB
0.1
V/µs
TRANSIENT RESPONSE
SR
Slew Rate
tr, tf, Large
Signal
Rise Time, 10% to 90% VOUT
AV = +2, VOUT = 1VP-P, Rg = Rf = 10kΩ
RL = 10kΩ to VCM
10
µs
Fall Time, 90% to 10% VOUT
AV = +2, VOUT = 1VP-P, Rg = Rf = 10kΩ
RL = 10kΩ to VCM
9
µs
Rise Time, 10% to 90% VOUT
AV = +2, VOUT = 10mVP-P,
Rg = Rf = RL = 10kΩ to VCM
650
ns
Fall Time, 90% to 10% VOUT
AV = +2, VOUT = 10mVP-P,
Rg = Rf = RL = 10kΩ to VCM
640
ns
Enable to Output Turn-on Delay Time, 10% VEN = 5V to 0V, AV = +2,
EN to 10% VOUT
Rg = Rf = RL = 1k to VCM
15
µs
Enable to Output Turn-off Delay Time, 10% VEN = 0V to 5V, AV = +2,
Rg = Rf = RL = 1k to VCM
EN to 10% VOUT
0.5
µs
tr, tf, Small
Signal
tEN
NOTE:
1. Parts are 100% tested at +25°C. Temperature limits established by characterization and are not production tested.
3
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
1
-1
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
0
Rf = Rg = 499
-2
Rf = Rg = 1k
-3
-4
-5
V+ = 5V
RL = 1k
CL = 16.3pF
AV = +2
VOUT = 10mVP-P
-6
-7
-8
Rf = Rg = 10k
Rf = Rg = 4.99k
-9
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
1
1
0
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
0
-1
-2
VOUT = 10mV
-3
VOUT = 50mV
-4
VOUT = 100mV
-5
VOUT = 1V
V+ = 5V
RL = 10k
CL = 16.3pF
AV = +1
VOUT = 10mVP-P
-6
-7
-8
1k
10k
100k
FREQUENCY (Hz)
1M
FIGURE 3. GAIN vs FREQUENCY vs VOUT, RL = 10k
GAIN (dB)
RL = 10k
0
-1
-2
-6
1k
VOUT = 100mV
-4
VOUT = 1V
-5 V+ = 5V
-6 RL = 100k
CL = 16.3pF
-7
AV = +1
-8 V
OUT = 10mVP-P
-9
1k
10k
100k
FREQUENCY (Hz)
AV = 1001
50
1
-5
VOUT = 50mV
-3
60
RL = 1k
2
-4
VOUT = 10mV
-2
70
3
-3
-1
RL = 100k
V+ = 5V
CL = 16.3pF
AV = +1
VOUT = 10mVP-P
1M
FIGURE 4. GAIN vs FREQUENCY vs VOUT, RL = 100k
4
NORMALIZED GAIN (dB)
1M
FIGURE 2. GAIN vs FREQUENCY vs VOUT, RL = 1k
FIGURE 1. GAIN vs FREQUENCY vs FEEDBACK RESISTOR
VALUES Rf/Rg
-9
4
VOUT = 10mV
3
2
VOUT = 50mV
1
0
-1
VOUT = 100mV
-2
-3 V = 5V
+
-4 RL = 1k
-5 CL = 16.3pF
VOUT = 1V
-6 AV = +1
-7 VOUT = 10mVP-P
-8
1k
10k
100k
FREQUENCY (Hz)
40
AV = 101
AV = 1, Rg = INF, Rf = 0
AV = 10, Rg = 1k, Rf = 9.09k
AV = 101, Rg = 1k, Rf = 100k
AV = 1001, Rg = 1k, Rf = 1M
V+ = 5V
CL = 16.3pF
RL = 10k
VOUT = 10mVP-P
30
20
AV = 10
10
AV = 1
0
10k
100k
FREQUENCY (Hz)
FIGURE 5. GAIN vs FREQUENCY vs RL
4
1M
-10
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 6. FREQUENCY RESPONSE vs CLOSED LOOP GAIN
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
8
1
V+ = 5V
-1
V+ = 2.4V
-2
-3
-4
-6
-7
RL = 10k
CL = 16.3pF
AV = +1
VOUT = 10mVP-P
-8
1k
10k
100k
FREQUENCY (Hz)
CL = 98.3pF
CL = 72.3pF
CL = 55.3pF
6
NORMALIZED GAIN (dB)
NORMALIZED GAIN (dB)
0
-5
4
2
0
-2
CL = 43.3pF
-4
CL = 34.3pF
V+ = 5V
-6 RL = 10k
AV = +1
-8 V
OUT = 10mVP-P
-10
1k
1M
FIGURE 7. GAIN vs FREQUENCY vs SUPPLY VOLTAGE
0
-10
-10
PSRR (dB)
CMRR (dB)
1M
PSRR-
-20
-20
-30
-40
-50
V+ = 2.4V, 5V
RL = 10k
CL = 16.3pF
AV = +1
VCM = 1VP-P
-60
-70
-80
100
1k
10k
FREQUENCY (Hz)
100k
-30
PSRR+
-40
-50
V+ = 2.4V
RL = 10k
CL = 16.3pF
AV = +1
VCM = 1VP-P
-60
-70
-80
-90
-100
10
1M
FIGURE 9. CMRR vs FREQUENCY, V+ = 2.4V AND 5V
100
1k
10k
FREQUENCY (Hz)
100k
1M
FIGURE 10. PSRR vs FREQUENCY, V+, V- = ±1.2V
1000
10
INPUT VOLTAGE NOISE (nV/√Hz)
0
-10
PSRR-
-20
-30
PSRR+
-40
-50
-60
V+ = 5V
RL = 10k
CL = 16.3pF
AV = +1
VCM = 1VP-P
-70
-80
-90
-100
10
10k
100k
FREQUENCY (Hz)
10
0
-90
10
CL = 16.3pF
FIGURE 8. GAIN vs FREQUENCY vs CL
10
PSRR (dB)
(Continued)
100
1k
10k
100k
FREQUENCY (Hz)
FIGURE 11. PSRR vs FREQUENCY, V+, V- = ±2.5V
5
1M
V+ = 5V
RL = 10k
CL = 16.3pF
AV = +1
100
10
1
10
100
1k
10k
100k
FREQUENCY (Hz)
FIGURE 12. INPUT VOLTAGE NOISE DENSITY vs FREQUENCY
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
0
V+ = 5V
RL = 10k
CL = 16.3pF
AV = +1
1
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
0.1
10
100
1k
FREQUENCY (Hz)
10k
-1.6
100k
FIGURE 13. INPUT CURRENT NOISE DENSITY vs FREQUENCY
0.4
0.018
SMALL SIGNAL (V)
0.020
0.2
V+, V- = ±2.5V
RL = 10k
CL = 16.3pF
Rg = Rf = 10k
AV = 2
VOUT = 1VP-P
-0.2
-0.4
50
100
150
2
200
250
TIME (µs)
300
350
5
6
TIME (s)
7
8
9
10
0.014
V+, V- = ±2.5V
RL = 10k
CL = 16.3pF
Rg = Rf = 10k
AV = 2
VOUT = 10mVP-P
0.012
0.010
0
50
100
150
200
250
TIME (µs)
300
350
400
FIGURE 16. SMALL SIGNAL STEP RESPONSE
6
1.2
V-OUT
V-ENABLE
5
1.0
4
0.8
V+ = 5V
Rg = Rf = 10k
CL = 16.3pF
AV = +2
VOUT = 1VP-P
3
2
1
0.6
0.4
0.2
RL = 10k
0
-1
4
0.016
0.006
400
FIGURE 15. LARGE SIGNAL STEP RESPONSE
V-ENABLE (V)
3
0.008
-0.6
0
1
FIGURE 14. INPUT VOLTAGE NOISE 0.1Hz TO 10Hz
0.6
0
0
OUTPUT (V)
1
LARGE SIGNAL (V)
RL = 10k
V+ = 5V
CL = 16.3pF AV = 1000
Rg = 100, Rf = 100k
-0.2
INPUT NOISE (µV)
INPUT CURRENT NOISE (pA/√Hz)
10
(Continued)
0
0
50
100
150
200
250
TIME (µs)
300
350
-0.2
400
FIGURE 17. ENABLE TO OUTPUT RESPONSE
6
FN6377.2
February 11, 2008
ISL28158, ISL28258
500
100
400
80
300
60
200
40
I-BIAS (pA)
VOS (µV)
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
100
0
-100
V+ = 5V
RL = OPEN
Rf = 100k, Rg = 100
AV = +1000
-200
-300
-400
20
0
0
1
2
-40
-60
-80
3
VCM (V)
4
5
-100
6
FIGURE 18. INPUT OFFSET VOLTAGE vs COMMON MODE
INPUT VOLTAGE
-1
0
1
2
3
VCM (V)
6
N = 1000
13
MAX
45
12
CURRENT (µA)
MAX
40
MEDIAN
35
MIN
30
11
10
MEDIAN
9
8
MIN
7
25
6
-20
0
20
40
60
80
100
5
-40
120
-20
0
20
TEMPERATURE (°C)
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 20. SUPPLY CURRENT ENABLED vs
TEMPERATURE, V+, V- = ±2.5V
FIGURE 21. SUPPLY CURRENT DISABLED vs
TEMPERATURE, V+, V- = ±2.5V
800
500
N = 1000
N = 1000
MAX
600
300
400
MAX
MEDIAN
-100
MIN
200
VOS (µV)
100
VOS (µV)
5
14
N = 1000
20
-40
4
FIGURE 19. INPUT BIAS CURRENT vs COMMON MODE
INPUT VOLTAGE
50
CURRENT (µA)
V+ = 5V
RL = OPEN
Rf = 100k, Rg = 100
AV = +1000
-20
-500
-1
(Continued)
MEDIAN
0
-200
-400
-300
-600
MIN
-500
-700
-40
-800
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 22. VOS (SOIC PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±2.75V
7
-1000
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 23. VOS (SOT PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±2.75V
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
1000
500
N = 1000
N = 1000
800
300
MAX
600
MAX
400
100
MEDIAN
VOS (µV)
VOS (µV)
(Continued)
-100
MIN
-300
200
MEDIAN
0
-200
-400
-600
-500
MIN
-800
-700
-40
-1000
-20
0
20
40
60
80
100
120
-40
-20
0
TEMPERATURE (°C)
FIGURE 24. VOS (SOIC PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±2.5V
1000
N = 1000
60
80
100
120
N = 1000
800
500
MAX
600
MAX
400
100
VOS (µV)
300
MEDIAN
-100
MIN
200
MEDIAN
0
-200
-400
-300
-600
-500
MIN
-800
-700
-40
-20
0
20
40
60
80
100
-1000
-40
120
-20
0
TEMPERATURE (°C)
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 26. VOS (SOIC PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±1.2V
FIGURE 27. VOS (SOT PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±1.2V
250
500
MAX
N = 1000
450
200
N = 1000
MAX
400
350
IBIAS- (pA)
MEDIAN
150
IBIAS+ (pA)
40
FIGURE 25. VOS (SOT PKG) vs TEMPERATURE, VIN = 0V,
V+, V- = ±2.5V
700
VOS (µV)
20
TEMPERATURE (°C)
100
MIN
50
MEDIAN
300
250
200
150
MIN
100
50
0
0
-50
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 28. IBIAS+ vs TEMPERATURE, V+, V- = ±2.5V
8
-50
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 29. IBIAS- vs TEMPERATURE, V+, V- = ±2.5V
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
350
450
N = 1000
MAX
300
N = 1000
MAX
400
350
250
300
MEDIAN
200
IBIAS- (pA)
IBIAS+ (pA)
(Continued)
150
100
MIN
MEDIAN
250
200
150
MIN
100
50
50
0
0
-50
-40
-50
-40
-20
0
20
40
60
80
100
120
-20
0
FIGURE 30. IBIAS+ vs TEMPERATURE, V+, V- = ±1.2V
20
-20
-10
100
120
-30
MAX
-60
-80
IOS (pA)
IOS (pA)
80
N = 1000
-40
MEDIAN
MAX
-50
-70
MEDIAN
-90
-100
-110
-120
MIN
MIN
-130
-140
-20
0
20
40
60
80
TEMPERATURE (°C)
100
-150
-40
120
N = 1000
130
MAX
PSRR (dB)
110
MEDIAN
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 34. CMRR vs TEMPERATURE, VCM = -2.5V TO +2.5V,
V+, V- = ±2.5V
9
100
120
MEDIAN
90
20
80
110
MIN
MIN
0
60
120
100
-20
40
MAX
90
80
20
N = 1000
130
120
100
0
FIGURE 33. IOS vs TEMPERATURE, V+, V- = ±1.2V
140
140
-20
TEMPERATURE (°C)
FIGURE 32. IOS vs TEMPERATURE, V+, V- = ±2.5
CMRR (dB)
60
30
N = 1000
10
70
-40
40
FIGURE 31. IBIAS- vs TEMPERATURE, V+, V- = ±1.2V
0
-160
-40
20
TEMPERATURE (°C)
TEMPERATURE (°C)
80
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
100
120
FIGURE 35. PSRR vs TEMPERATURE, V+, V- = ±1.2V TO ±2.75V
FN6377.2
February 11, 2008
ISL28158, ISL28258
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
70
450
N = 1000
N = 1000
MAX
65
400
60
MAX
350
55
AVOL (V/mV)
AVOL (V/mV)
(Continued)
300
250
MEDIAN
50
MEDIAN
45
40
MIN
35
200
30
MIN
150
25
100
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
100
20
-40
120
FIGURE 36. AVOL vs TEMPERATURE, V+, V- = ±2.5V,
VO = -2V TO +2V, RL = 100k
-20
0
20
40
60
80
TEMPERATURE (°C)
100
120
FIGURE 37. AVOL vs TEMPERATURE, V+, V- = ±2.5V,
VO = -2V TO +2V, RL = 1k
4.92
4.9980
N = 1000
N = 1000
4.91
4.9975
4.90
4.88
VOUT (V)
VOUT (V)
MAX
MAX
4.89
MEDIAN
4.87
4.86
4.9970
MEDIAN
4.9965
MIN
MIN
4.9960
4.85
4.84
-40
-20
0
20
40
60
80
100
120
4.9955
-40
-20
0
FIGURE 38. VOUT HIGH vs TEMPERATURE, V+, V- =±2.5V,
RL = 1k
190
7.5
N = 1000
MAX
150
140
100
120
MAX
MEDIAN
6.0
5.5
MEDIAN
5.0
120
MIN
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 40. VOUT LOW vs TEMPERATURE, V+, V- = ±2.5V,
RL = 1k
10
MIN
4.5
110
100
-40
80
N = 1000
6.5
160
130
60
7.0
VOUT (mV)
VOUT (mV)
40
FIGURE 39. VOUT HIGH vs TEMPERATURE, V+, V- = ±2.5V,
RL = 100k
180
170
20
TEMPERATURE (°C)
TEMPERATURE (°C)
4.0
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 41. VOUT LOW vs TEMPERATURE, V+, V- = ±2.5V,
RL = 100k
FN6377.2
February 11, 2008
ISL28158, ISL28258
45
IO- SHORT CIRCUIT CURRENT (mA)
IO+ SHORT CIRCUIT CURRENT (mA)
Typical Performance Curves V+ = 5V, V- = 0V, VCM = 2.5V, RL = Open.
N = 1000
40
MAX
35
MEDIAN
30
25
MIN
20
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
100
120
(Continued)
-20
N = 1000
MAX
-22
-24
MEDIAN
-26
MIN
-28
-30
-32
-40
-20
0
20
40
60
80
100
120
TEMPERATURE (°C)
FIGURE 43. IO- SHORT CIRCUIT OUTPUT CURRENT vs
TEMPERATURE VIN = +2.55V, RL = 10k,
V+, V- = ±2.5V
FIGURE 42. IO+ SHORT CIRCUIT OUTPUT CURRENT vs
TEMPERATURE VIN = -2.55V, RL = 10k,
V+, V- = ±2.5V
Pin Descriptions
ISL28158
(6 Ld SOT-23)
4
ISL28158
(8 Ld SOIC)
ISL28258
(8 Ld SOIC)
(8 Ld MSOP)
PIN NAME
FUNCTION
1, 5
NC
Not connected
2
ININ- (A)
IN- (B)
inverting input
2 (A)
6 (B)
EQUIVALENT CIRCUIT
V+
IN-
IN+
VCircuit 1
3
2
3 (A)
5 (B)
IN+
IN+ (A)
IN+ (B)
4
V-
3
4
Non-inverting input
Negative supply
See Circuit 1
V+
CAPACITIVELY
COUPLED
ESD CLAMP
VCircuit 2
1
6
1 (A)
7 (B)
OUT
OUT (A)
OUT (B)
Output
V+
OUT
VCircuit 3
6
7
5
8
8
V+
Positive supply
EN
Chip enable
See Circuit 2
V+
LOGIC
PIN
VCircuit 3
11
FN6377.2
February 11, 2008
ISL28158, ISL28258
Applications Information
Enable/Disable Feature
Introduction
The ISL28158 is a single CMOS rail-to-rail input, output
(RRIO) operational amplifier with an enable feature. The
ISL28258 is a dual version without the enable feature. Both
devices are designed to operate from single supply (2.4V to
5.5V) or dual supplies (±1.2V to ±2.75V).
Rail-to-Rail Input/Output
These devices feature PMOS inputs with an input common
mode range that extends up to 0.3V beyond the V+ rail, and
to 0.1V below the V- rail. The CMOS output features
excellent drive capability, typically swinging to within 6mV of
either rail with a 100kΩ load.
Results of Over-Driving the Output
Caution should be used when over-driving the output for
long periods of time. Over-driving the output can occur in two
ways. 1) The input voltage times the gain of the amplifier
exceeds the supply voltage by a large value or, 2) the output
current required is higher than the output stage can deliver.
These conditions can result in a shift in the Input Offset
Voltage (VOS) as much as 1µV/hr. of exposure under these
conditions.
IN+ and IN- Input Protection
All input terminals have internal ESD protection diodes to both
positive and negative supply rails, limiting the input voltage to
within one diode beyond the supply rails. They also contain
back-to-back diodes across the input terminals (see “Pin
Descriptions” on page 11 - Circuit 1). For applications where
the input differential voltage is expected to exceed 0.5V, an
external series resistor must be used to ensure the input
currents never exceed 5mA (Figure 44).
Limitations of the Differential Input Protection
If the input differential voltage is expected to exceed 0.5V, an
external current limiting resistor must be used to ensure the
input current never exceeds 5mA. For non-inverting unity
gain applications, the current limiting can be via a series IN+
resistor, or via a feedback resistor of appropriate value. For
other gain configurations, the series IN+ resistor is the best
choice, unless the feedback (RF) and gain setting (RG)
resistors are both sufficiently large to limit the input current to
5mA.
Large differential input voltages can arise from several
sources:
VIN
The ISL28158 offers an EN pin that disables the device
when pulled up to at least 2.0V. In the disabled state (output
in a high impedance state), the part consumes typically 10µA
at room temperature. By disabling the part, multiple
ISL28158 parts can be connected together as a MUX. In this
configuration, the outputs are tied together in parallel and a
channel can be selected by the EN pin. The loading effects
of the feedback resistors of the disabled amplifier must be
considered when multiple amplifier outputs are connected
together. Note that feed through from the IN+ to IN- pins
occurs on any Mux Amp disabled channel where the input
differential voltage exceeds 0.5V (e.g., active channel
VOUT = 1V, while disabled channel VIN = GND), so the mux
implementation is best suited for small signal applications. If
large signals are required, use series IN+ resistors, or large
value RF, to keep the feed through current low enough to
minimize the impact on the active channel. See “Limitations
of the Differential Input Protection” on page 12 for more
details. The EN pin also has an internal pull-down. If left
open, the EN pin will pull to the negative rail and the device
will be enabled by default. When not used, the EN pin should
either be left floating or connected directly to the -V pin.
VOUT
RIN
RL
+
FIGURE 44. INPUT CURRENT LIMITING
1) During open loop (comparator) operation. Used this way,
the IN+ and IN- voltages don’t track, so differentials arise.
2) When the amplifier is disabled but an input signal is still
present. An RL or RG to GND keeps the IN- at GND, while
the varying IN+ signal creates a differential voltage. Mux
Amp applications are similar, except that the active channel
VOUT determines the voltage on the IN- terminal.
3) When the slew rate of the input pulse is considerably
faster than the op amp’s slew rate. If the VOUT can’t keep up
with the IN+ signal, a differential voltage results, and visible
distortion occurs on the input and output signals. To avoid
this issue, keep the input slew rate below 0.1V/µs, or use
appropriate current limiting resistors.
Large (>2V) differential input voltages can also cause an
increase in disabled ICC.
12
FN6377.2
February 11, 2008
ISL28158, ISL28258
Using Only One Channel
Power Dissipation
The ISL28258 is a dual op amp. If the application only
requires one channel, the user must configure the unused
channel to prevent it from oscillating. The unused channel
will oscillate if the input and output pins are floating. This will
result in higher than expected supply currents and possible
noise injection into the channel being used. The proper way
to prevent this oscillation is to short the output to the
negative input and ground the positive input (as shown in
Figure 45).
It is possible to exceed the +125°C maximum junction
temperatures under certain load and power-supply
conditions. It is therefore important to calculate the
maximum junction temperature (TJMAX) for all applications
to determine if power supply voltages, load conditions, or
package type need to be modified to remain in the safe
operating area. These parameters are related in Equation 1:
T JMAX = T MAX + ( θ JA xPD MAXTOTAL )
(EQ. 1)
-
where:
+
• PDMAXTOTAL is the sum of the maximum power
dissipation of each amplifier in the package (PDMAX)
FIGURE 45. PREVENTING OSCILLATIONS IN UNUSED
CHANNELS
• PDMAX for each amplifier can be calculated using
Equation 2:
V OUTMAX
PD MAX = 2*V S × I SMAX + ( V S - V OUTMAX ) × ---------------------------R
Current Limiting
These devices have no internal current-limiting circuitry. If
the output is shorted, it is possible to exceed the Absolute
Maximum Rating for output current or power dissipation,
potentially resulting in the destruction of the device.
L
(EQ. 2)
where:
• TMAX = Maximum ambient temperature
• θJA = Thermal resistance of the package
• PDMAX = Maximum power dissipation of 1 amplifier
• VS = Supply voltage (Magnitude of V+ and V-)
• IMAX = Maximum supply current of 1 amplifier
• VOUTMAX = Maximum output voltage swing of the
application
• RL = Load resistance
13
FN6377.2
February 11, 2008
ISL28158, ISL28258
SOT-23 Package Family
MDP0038
e1
D
SOT-23 PACKAGE FAMILY
A
MILLIMETERS
6
N
SYMBOL
4
E1
2
E
3
0.15 C D
1
2X
2
3
0.20 C
5
2X
e
0.20 M C A-B D
B
b
NX
0.15 C A-B
1
3
SOT23-5
SOT23-6
A
1.45
1.45
MAX
A1
0.10
0.10
±0.05
A2
1.14
1.14
±0.15
b
0.40
0.40
±0.05
c
0.14
0.14
±0.06
D
2.90
2.90
Basic
E
2.80
2.80
Basic
E1
1.60
1.60
Basic
e
0.95
0.95
Basic
e1
1.90
1.90
Basic
L
0.45
0.45
±0.10
L1
0.60
0.60
Reference
N
5
6
Reference
D
2X
TOLERANCE
Rev. F 2/07
NOTES:
C
A2
2. Plastic interlead protrusions of 0.25mm maximum per side are not
included.
SEATING
PLANE
A1
0.10 C
1. Plastic or metal protrusions of 0.25mm maximum per side are not
included.
3. This dimension is measured at Datum Plane “H”.
4. Dimensioning and tolerancing per ASME Y14.5M-1994.
NX
5. Index area - Pin #1 I.D. will be located within the indicated zone
(SOT23-6 only).
(L1)
6. SOT23-5 version has no center lead (shown as a dashed line).
H
A
GAUGE
PLANE
c
L
14
0.25
0° +3°
-0°
FN6377.2
February 11, 2008
ISL28158, ISL28258
Small Outline Package Family (SO)
A
D
h X 45°
(N/2)+1
N
A
PIN #1
I.D. MARK
E1
E
c
SEE DETAIL “X”
1
(N/2)
B
L1
0.010 M C A B
e
H
C
A2
GAUGE
PLANE
SEATING
PLANE
A1
0.004 C
0.010 M C A B
L
b
0.010
4° ±4°
DETAIL X
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO)
INCHES
SYMBOL
SO-14
SO16 (0.300”)
(SOL-16)
SO20
(SOL-20)
SO24
(SOL-24)
SO28
(SOL-28)
TOLERANCE
NOTES
A
0.068
0.068
0.068
0.104
0.104
0.104
0.104
MAX
-
A1
0.006
0.006
0.006
0.007
0.007
0.007
0.007
±0.003
-
A2
0.057
0.057
0.057
0.092
0.092
0.092
0.092
±0.002
-
b
0.017
0.017
0.017
0.017
0.017
0.017
0.017
±0.003
-
c
0.009
0.009
0.009
0.011
0.011
0.011
0.011
±0.001
-
D
0.193
0.341
0.390
0.406
0.504
0.606
0.704
±0.004
1, 3
E
0.236
0.236
0.236
0.406
0.406
0.406
0.406
±0.008
-
E1
0.154
0.154
0.154
0.295
0.295
0.295
0.295
±0.004
2, 3
e
0.050
0.050
0.050
0.050
0.050
0.050
0.050
Basic
-
L
0.025
0.025
0.025
0.030
0.030
0.030
0.030
±0.009
-
L1
0.041
0.041
0.041
0.056
0.056
0.056
0.056
Basic
-
h
0.013
0.013
0.013
0.020
0.020
0.020
0.020
Reference
-
16
20
24
28
Reference
-
N
SO-8
SO16
(0.150”)
8
14
16
Rev. M 2/07
NOTES:
1. Plastic or metal protrusions of 0.006” maximum per side are not included.
2. Plastic interlead protrusions of 0.010” maximum per side are not included.
3. Dimensions “D” and “E1” are measured at Datum Plane “H”.
4. Dimensioning and tolerancing per ASME Y14.5M-1994
15
FN6377.2
February 11, 2008
ISL28158, ISL28258
Mini SO Package Family (MSOP)
0.25 M C A B
D
MINI SO PACKAGE FAMILY
(N/2)+1
N
E
MDP0043
A
E1
MILLIMETERS
PIN #1
I.D.
1
B
(N/2)
e
H
C
SEATING
PLANE
0.10 C
N LEADS
SYMBOL
MSOP8
MSOP10
TOLERANCE
NOTES
A
1.10
1.10
Max.
-
A1
0.10
0.10
±0.05
-
A2
0.86
0.86
±0.09
-
b
0.33
0.23
+0.07/-0.08
-
c
0.18
0.18
±0.05
-
D
3.00
3.00
±0.10
1, 3
E
4.90
4.90
±0.15
-
E1
3.00
3.00
±0.10
2, 3
e
0.65
0.50
Basic
-
L
0.55
0.55
±0.15
-
L1
0.95
0.95
Basic
-
N
8
10
Reference
-
0.08 M C A B
b
Rev. D 2/07
NOTES:
1. Plastic or metal protrusions of 0.15mm maximum per side are not
included.
L1
2. Plastic interlead protrusions of 0.25mm maximum per side are
not included.
A
3. Dimensions “D” and “E1” are measured at Datum Plane “H”.
4. Dimensioning and tolerancing per ASME Y14.5M-1994.
c
SEE DETAIL "X"
A2
GAUGE
PLANE
A1
L
0.25
3° ±3°
DETAIL X
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16
FN6377.2
February 11, 2008