Datasheet

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Precision Micropower, OVP, RRIO

Operational Amplifier

Data Sheet

ADA4091-2/ADA4091-4

Rev. G Document Feedback

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FEATURES

Single-supply operation: 3.0 V to 30 V

Wide input voltage range

Rail-to-rail output swing

Low supply current: 200 μA/amplifier

Wide bandwidth: 1.2 MHz

Slew rate: 0.46 V/μs

Low offset voltage: 250 μV maximum

No phase reversal

Overvoltage protection (OVP)

25 V above/below supply rails at ±5 V

12 V above/below supply rails at ±15 V

APPLICATIONS

Industrial process control

Battery-powered instrumentation

Power supply control and protection

Telecommunications

Remote sensors

Low voltage strain gage amplifiers

DAC output amplifiers

GENERAL DESCRIPTION

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

+3.0 V to +30 V single supply as well as from ±1.5 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.

Applications for these amplifiers include portable telecom-

munications equipment, power supply control and protection,

and interface for transducers with wide output ranges. Sensors

requiring a rail-to-rail input amplifier include Hall effect, piezo-

electric, and resistive transducers.

The ability to swing rail-to-rail at both the input and output enables

designers, for example, to build multistage filters in single-supply

systems and to maintain high signal-to-noise ratios (SNR).

The ADA4091 family is specified over the extended industrial

temperature range of −40°C to +125°C. e ADA4091 family is

part of the growing selection of 36 V, low power op amps from

Analog Devices, Inc., (see Table 1).

PIN CONFIGURATIONS

OUTA

–INA

+INA

–V

OUTB

–INB

+INB

ADA4091-2

TOP VIEW

(Not to Scale)

07671-001

Figure 1. 8-Lead, Narrow-Body SOIC (R-8)

1OUTA

2–INA

3+INA

4–V

7OUTB

8+V

6–INB

5+INB

TOP VIEW

07571-102

ADA4091-2

(Not to Scale)

NOTES

1. IT IS RECOMMENDED TO CONNECT THE

EXPOSED PAD TO V–.

Figure 2. 8-Lead LFCSP (CP-8-9)

07671-101

ADA4091-4

–INA

+INA

OUTB

–INB

+INB

OUTA

–IND

+IND

–V

OUTC

–INC

+INC

OUTD

TOP VIEW

(Not to Scale)

Figure 3. 14-Lead TSSOP (RU-14)

07671-103

–IND

+IND

V–

+INC

–INA

V+

+INA

INB

OUTB

–INB

OUTC

–INC

OUTA

OUT

TOP

VIEW

ADA4091-4

NOTES

1. NC = NO CONNECT.

2. IT IS RECOMMENDED TO CONNECT THE

EXPOSED PAD TO V–.

Figure 4. 16-Lead LFCSP (CP-16-17)

The ADA4091-2 is available in 8-lead, plastic SOIC and 8-lead

LFCSP packages. The ADA4091-4 is available in 14–lead TSSOP

and 16-lead LFCSP surface-mount packages.

Table 1. Low Power, 36 V Operational Amplifiers

Family Rail-to-Rail I/O PJFET Low Noise

Single OP1177

Dual ADA4091-2 AD8682 OP2177

Quad ADA4091-4 AD8684 OP4177

Summary of content (20 pages)

PAGE 1
Precision Micropower, OVP, RRIO Operational Amplifier ADA4091-2/ADA4091-4 Data Sheet PIN CONFIGURATIONS Single-supply operation: 3.0 V to 30 V Wide input voltage range Rail-to-rail output swing Low supply current: 200 μA/amplifier Wide bandwidth: 1.2 MHz Slew rate: 0.
PAGE 2
ADA4091-2/ADA4091-4 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 ESD Caution...................................................................................6 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................7 General Description ................................................
PAGE 3
Data Sheet ADA4091-2/ADA4091-4 SPECIFICATIONS ELECTRICAL SPECIFICATIONS VSY = ±1.5 V, VCM = 0.0 V, TA = 25°C, unless otherwise noted. Table 2.
PAGE 4
ADA4091-2/ADA4091-4 Data Sheet VSY = ±5.0 V, VCM = 0.0 V, TA = 25°C, unless otherwise noted. Table 3.
PAGE 5
Data Sheet ADA4091-2/ADA4091-4 VSY = ±15.0 V, VCM = 0.0 V, VO = 0.0 V, TA = 25°C, unless otherwise noted. Table 4.
PAGE 6
ADA4091-2/ADA4091-4 Data Sheet ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 5.
PAGE 7
Data Sheet ADA4091-2/ADA4091-4 TYPICAL PERFORMANCE CHARACTERISTICS 200 10,000 ADA4091-2 TA = 25°C VSY = ±1.5V 180 1000 140 VOUT TO RAIL (mV) 120 100 80 60 100 VDD – VOH 10 VOL – VSS 40 1 20 50 100 150 200 250 1 10 100 ADA4091-2 –40°C ≤ TA ≤ +125°C VSY = ±1.5V 200 150 100 80 80 60 60 GAIN 50 40 40 20 20 0 –1 1 0 2 3 4 5 7 6 8 TCVOS (µV/°C) ADA4091-2 VSY = ±1.5V RL = 1MΩ CL = 35pF –20 1k 07671-035 0 100 PHASE OPEN-LOOP GAIN (dB) 250 100 Figure 8.
PAGE 8
ADA4091-2/ADA4091-4 Data Sheet 3.0 1k 2.5 VOUT SWING (V) 100 10 AV = 10 2.0 1.5 1.0 AV = 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 0 100 07671-013 0.1 ADA4091-2 VSY = ±1.5V VIN = 2.8V p-p RL = 100kΩ 0.5 ADA4091-2 TA = 25°C VSY = ±1.5V 1k Figure 11. Output Impedance vs. Frequency 1.6 1.5 1.4 OUTPUT VOLTAGE (V) 0 ADA4091-2 VSY = ±1.5V TA = 25°C RL = 100kΩ CL = 100pF AV = +1 –0.5 –1.0 1.0 0.8 0.6 0.4 0.2 –1.5 ADA4091-2 TA = 25°C VSY = ±1.
PAGE 9
Data Sheet ADA4091-2/ADA4091-4 0.06 225 ADA4091-2 TA = 25°C VSY = ±5V 0.04 175 0.02 150 VOUT (V) 125 100 ADA4091-2 VSY = ±5V TA = 25°C RL = 100kΩ CL = 100pF AV = +1 0 –0.02 75 –0.04 50 –250 –200 –150 –100 –50 0 50 100 150 200 250 VOS (µV) –0.08 07671-037 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TIME (µs) Figure 17. Input Offset Voltage Distribution Figure 20.
PAGE 10
ADA4091-2/ADA4091-4 Data Sheet 50 1k AV = 100 40 AV = 100 10 AV = 10 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 07671-012 0.1 AV = 10 20 10 AV = 1 0 ADA4091-2 –10 VSY = ±5V RL = 1MΩ CL = 35pF –20 100 10 ADA4091-2 TA = 25°C VSY = ±5V AV = 1 30 1k 10k 100k 1M 10M FREQUENCY (Hz) 07671-009 CLOSED-LOOP GAIN (dB) ZOUT (Ω) 100 Figure 26. Closed-Loop Gain vs. Frequency Figure 23. Output Impedance vs.
PAGE 11
Data Sheet ADA4091-2/ADA4091-4 250 100 ADA4091-2 TA = 25°C VSY = ±15V 100 50 100 150 200 250 VOS (µV) 60 GAIN 20 0 ADA4091-2 VSY = ±15V RL = 1MΩ CL = 35pF –20 1k 10k 0 100k –20 10M 1M FREQUENCY (Hz) Figure 32. Open-Loop Gain and Phase vs. Frequency Figure 29.
PAGE 12
ADA4091-2/ADA4091-4 Data Sheet 50 30 40 VOUT SWING (V) 25 20 15 ADA4091-2 5 VSY = ±15V VIN = 29.8V p-p RL = 100kΩ 0 100 1k 10k 100k 1M FREQUENCY (Hz) 30 AV = 10 20 10 AV = 1 0 –10 ADA4091-2 –20 VSY = ±15V RL = 1MΩ CL = 35pF –30 10 100 07671-016 10 AV = 100 1k 10k 100k 1M 10M FREQUENCY (Hz) Figure 35. Output Voltage Swing vs. Frequency 07671-008 CLOSED-LOOP GAIN (dB) 35 Figure 38. Closed-Loop Gain vs.
PAGE 13
Data Sheet ADA4091-2/ADA4091-4 100 0.5 ADA4091-2 VSY = ±1.5V, ±5V, ±15V 0.4 80 0.3 60 0.1 PSRR (dB) 0 –0.1 PSRR+ PSRR– 40 20 –0.2 –0.3 0 –0.4 ADA4091-2 VSY = ±15V 0 1 2 3 4 5 6 7 8 9 10 TIME (Seconds) –20 100 07671-043 –0.5 1k 10k 100k 1M 10M FREQUENCY (Hz) 07671-003 NOISE (µV p-p) 0.2 Figure 44. PSRR vs. Frequency Figure 41.
PAGE 14
ADA4091-2/ADA4091-4 Data Sheet THEORY OF OPERATION Q1 and Q2 are high enough to turn on Q3, which diverts the tail current away from the PNP input stage, turning it off. The tail current of the PNP pair is diverted to the Q4/Q7 current mirror to activate the NPN input stage. The ADA4091 family is a single-supply, micropower amplifier featuring rail-to-rail inputs and outputs. To achieve wide input and output ranges, these amplifiers employ unique input and output stages.
PAGE 15
Data Sheet ADA4091-2/ADA4091-4 INPUT OVERVOLTAGE PROTECTION The ADA4091-x has two different ESD circuits for enhanced protection, as shown in Figure 48. For a worst-case design analysis, consider two cases. The ADA4091-x has a normal ESD structure from the internal op amp inputs to the supply rails. In addition, it has 42 V DIACs from the external inputs to the rails, as shown in Figure 47. Therefore, two conditions need to be considered to determine which case is the limiting factor.
PAGE 16
ADA4091-2/ADA4091-4 Data Sheet OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890) 8 4.00 (0.1574) 3.80 (0.1497) 1 5 4 1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE 6.20 (0.2441) 5.80 (0.2284) 1.75 (0.0688) 1.35 (0.0532) 0.51 (0.0201) 0.31 (0.0122) 0.50 (0.0196) 0.25 (0.0099) 45° 8° 0° 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.
PAGE 17
Data Sheet ADA4091-2/ADA4091-4 5.10 5.00 4.90 14 8 4.50 4.40 4.30 6.40 BSC 1 7 PIN 1 0.65 BSC 1.20 MAX 0.15 0.05 COPLANARITY 0.10 0.30 0.19 0.20 0.09 0.75 0.60 0.45 8° 0° SEATING PLANE 061908-A 1.05 1.00 0.80 COMPLIANT TO JEDEC STANDARDS MO-153-AB-1 Figure 52. 14-Lead Thin Shrink Small Outline Package [TSSOP] (RU-14) Dimensions shown in millimeters PIN 1 INDICATOR 4.10 4.00 SQ 3.90 0.35 0.30 0.25 0.65 BSC 16 13 PIN 1 INDICATOR 12 1 EXPOSED PAD 4 2.70 2.60 SQ 2.50 9 0.80 0.75 0.
PAGE 18
ADA4091-2/ADA4091-4 Data Sheet ORDERING GUIDE Model 1 ADA4091-2ARZ ADA4091-2ARZ-R7 ADA4091-2ARZ-RL ADA4091-2ACPZ-R2 ADA4091-2ACPZ-R7 ADA4091-2ACPZ-RL ADA4091-4ARUZ ADA4091-4ARUZ-RL ADA4091-4ACPZ-R2 ADA4091-4ACPZ-R7 ADA4091-4ACPZ-RL 1 Temperature Range −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C −40°C to +125°C Package Description 8-Lead Standard Small Outline Package (SOIC_N) 8-Lead Standa
PAGE 19
Data Sheet ADA4091-2/ADA4091-4 NOTES Rev.
PAGE 20
ADA4091-2/ADA4091-4 Data Sheet NOTES ©2008–2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07671-0-10/13(G) Rev.