Precision Amplifiers (VOS < 1 mV, Bandwidth < 50 MHz)
Overvoltage Protection (OVP) Amplifiers
ADA4091-2/ADA4091-4: Micropower, OVP, Rail-to-Rail Input/Output Operational Amplifier
The ADA4091-2 dual and ADA4091-4 quad are micropower, single-supply, 1.2 MHz bandwidth amplifiers featuring rail-to-rail inputs and outputs. They are
guaranteed to operate from a +2.7 V to +30 V single supply, as well as from ±1.35 V to ±15 V dual supplies. The ADA4091 family features a unique input
stage that allows the input voltage to exceed either supply safely without any phase reversal or latch-up; this is called overvoltage protection, or OVP.
Features
•ꢀSingle-supply operation: 2.7 V to 36 V
V
DD
+30V
U1A
V
•ꢀRail-to-rail output swing
DD
R
BIAS 12kꢀ
+30V
•ꢀLow supply current: 200 mA/amplifier
•ꢀWide bandwidth: 1.2 MHz
1/2
ADR512
V
1
10nF
V
DD
+30V
ADA4091-2
U1B
•ꢀLow offset voltage: 250 mV maximum
•ꢀNo phase reversal
AD5292
2/2
V
OUT
20kꢀ
R
R
1
ADA4091-2
2
•ꢀOvervoltage protection (OVP)
•ꢀ25 V above/below supply rails at 65 V
•ꢀ12 V above/below supply rails at 615 V
22.1kꢀ ꢁ 1%
1kꢀ ꢁ 1%
SERIAL
INTERFACE
V
SS
Applications
•ꢀIndustrial process control
•ꢀBattery-powered instrumentation
•ꢀPower supply control and protection
•ꢀTelecommunications
Circuit Note CN-0111, Low Cost, High Voltage, Unipolar DAU Reference Circuit,
www.analog.com/CN0111.
•ꢀRemote sensors
•ꢀLow voltage strain gage amplifiers
•ꢀDAC output amplifiers
Overvoltage Protection (OVP) Amplifiers
Supply
Voltage
(Min/Max)
BW @
CL Min Rate
(MHz) (V/ms)
Slew
CMRR PSRR AVO
Min Min Min (nV/
(dB) (dB) (dB) @ 1 kHz
Noise
OVP
Level
(V)
Price
@ 1k
(OEM $US)
Part
No. of
VOS Max
(mV)
TcVOS
(mv/°C Typ)
IS/Amp
(mA Max)
Process
Rail-to-Rail1
A
√
H
z)
Packaging
Number Amps
OP191
OP291
OP491
1
2
4
10
10
25
SOIC
SOIC
SOIC/TSSOP/PDIP
1.69
2.22
3.60
Bipolar
Bipolar
2.7/12
RRIO
1.5
0.5
0.5
1.1
75
80
88
42
0.420
ADA4091-2
ADA4091-4
2
4
SOIC/LFCSP
LFCSP/TSSOP
2.22
3.50
61.35/618
61.35/618
RRIO
RRIO
1.27
1.4
0.46
0.4
0.25
1.5
2.5
2.5
104
90
108 116
98 116
25
30
0.250
0.250
12
12
Bipolar ADA4092-4
4
TSSOP
2.50
1 RRIO: rail-to-rail input/output, RRO: rail-to-rail output, SS: single supply (IVR includes –VSY).
www.analog.com/opamps
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