ISL28127_12 Datasheet, PDF (33/44 Pages) Intersil Corporation – Providing high-performance solutions for every link in the signal chain

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Zero Drift Amplifiers (Low
Voltage Precision Op Amps)
Chopper-stabilized amplifiers (Zero Drift Amplifiers) offer
one of the best solutions, for the lowest offset voltage and
drift. These amplifiers achieve high DC precision through
a continuously running calibration mechanism that is
implemented on-chip.
Features and Benefits
• Low Drift / Reduced Offset Voltage Over Temperature
(typically < 0.5nV/ºC) [Figure 1]
• Low Drift /Reduced Offset Voltage Over Time [Figure 2]
• Low Offset Voltage / Reduced Offset Voltage (typically <1µV)
[Figure 3]
• Low Offset Voltage Over the Common Mode Range and
Power Supply (CMRR & PSRR typically > 125dB) [Figure 4]
• Eliminates or No 1/f Noise [Figure 5]
• Very High Open Loop Gain
• Precision Signal Amplifications
Chopper-stablized Amplifiers : ISL28x33, ISL28x34
Precision Amps by DC Offset and Drift Over
Temperature
PR40 Products
ISL28158/258 5V
ISL28110/210 40V
300
ISL28108/208/408 40V _{ISL28136/236 5V}
ISL28118/218 40V
150
ISL28177 40V
100
ISL28107/207/407 40V
EL8176 5V
75
70
ISL28127/227 40V
ISL28117B/217B/417B 40V
ISL28133/233/433 5V
8
5 _{ISL28134 5V}
0.015
0.02 0.1 0.3 0.4 0.6 0.7
1.4
TCVos - Voltage Offset Drift (typ) (μV/°C)
Low Drift Over Temperature
Offset Drift = 0.5nV/°C
2.0
1.5
ISL28134
1.0
0.5
0
-0.5
-1.0
-1.5
VS = ±1.125V
VCM = 0V
-2.0
-40
-15
10
35
60
85
TEMPERATURE (°C)
Figure 1. V_OS vs Temperature
Low Noise
Low Offset Voltage
300
ISL28134
200
100
0
-100
-200
Vs = ±2.5V
AV = 10,000
Rg = 10, Rf = 100k
-300
0 1 23
45 6
TIME (s)
78
9 10
Figure 2. Input Noise Voltage 0.1Hz to 10Hz
4
3
ISL28134
2
1
0
-1
-2
-3
-4
1.0
1.5
2.0
2.5
3.0
3.5
SUPPLY VOLTAGE (V)
Figure 3. V_OS vs Supply Voltage
High CMRR/PSRR
160
ISL28134
150
PSRR
140
130
120
CMRR
110
PSRR
Vs = ±1.125V to ±3V
VCM = 0V
CMRR
Vs = ±2.5V
VCM = -2.6V to +2.6V
100
-40
-15
10
35
60
85
TEMPERATURE (°C)
Figure 4. CMRR vs Temperature
No 1/f Noise
10k
1k
Chopper Stabilized Amp
(ISL28134)
Conventional CMOS Amp
100
10
1
100m
1
10
100
1k
FREQUENCY (Hz)
10k
100k
Figure 5. 5V CMOS ISL28134 vs CMOS Amp
Noise Voltage Density Comparison
Part Number
Single
Dual
Quad
Supply
Voltage (V)
Min Max
Rail-To-
Rail
In Out
Vos Max
@ 25°C
µV
TCVos
Max
µV/°C
Ib Max
@
25°C
nA
ISL28133* ISL28233 ISL28433 1.65 5.5 Yes Yes 6
0.05 0.18
ISL28134
2.25 6 Yes Yes 0.0025 0.0005 0.3
*Some specifications will differ, please check data sheet for actual parameters and/or conditions
CMRR
min @
25°C
dB
118
120
PSRR
min @
25°C
dB
110
120
Is Max
Noise Voltage
@
Slew 0.1 to Noise @
25°C GBW Rate 10Hz 1kHz
Package
mA MHz V/µs µVpp nV/√Hz
Single
Dual
Quad
0.025 0.4 0.2
1
65
SC70, SOT23,
TDFN
MSOP, SOIC,
TDFN
SOIC, TSSOP
0.900 3.5 1.5 0.25
10 SOIC, SOT23
Intersil Signal Path Products  2012  www.intersil.com
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