Datasheet

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Micropower RRIO Operational Amplifier

ADA4092-4

Rev. B

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FEATURES

Single-supply operation: 3 V to 30 V

Wide input voltage range

Rail-to-rail output swing

Low supply current: 200 μA/amplifier

Wide bandwidth: 1.4 MHz

High phase margin: 69°

Slew rate: 0.4 V/μs

Low offset voltage: 1.50 mV 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

PIN CONFIGURATION

08803-001

ADA4092-4

–INA

+INA

OUTB

–INB

+INB

OUTA

–IND

+IND

–V

OUTC

–INC

+INC

OUTD

TOP VIEW

(Not to Scale)

Figure 1. 14-Lead TSSOP (RU-14)

GENERAL DESCRIPTION

The ADA4092-4 quad is a micropower, single-supply, 1.4 MHz

bandwidth amplifier featuring rail-to-rail inputs and outputs. It

is guaranteed to operate from a +3 V to +30 V single supply as

well as from ±1.5 V to ±15 V dual supplies.

The ADA4092-4 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 (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 ADA4092-4 is specified over the extended industrial

temperature range of −40°C to +125°C. The ADA4092-4 is

part of the growing selection of 30 V, low power op amps from

Analog Devices, Inc., see Table 1.

The ADA4092-4 is available in the 14–lead TSSOP surface-mount

package.

Table 1. Low Power, 30 V Operational Amplifiers

Family Rail-to-Rail I/O

RRIO

Precision PJFET

Low

Noise

Single

OP1177

Dual

ADA4091-2 AD8682 OP2177

Quad ADA4092-4

ADA4091-4 AD8684 OP4177

Summary of content (20 pages)

PAGE 1
Micropower RRIO Operational Amplifier ADA4092-4 PIN CONFIGURATION Single-supply operation: 3 V to 30 V Wide input voltage range Rail-to-rail output swing Low supply current: 200 μA/amplifier Wide bandwidth: 1.4 MHz High phase margin: 69° Slew rate: 0.4 V/μs Low offset voltage: 1.
PAGE 2
ADA4092-4 TABLE OF CONTENTS Features .............................................................................................. 1 ESD Caution...................................................................................6 Applications ....................................................................................... 1 Typical Performance Characteristics ..............................................7 Pin Configuration .........................................................................
PAGE 3
ADA4092-4 SPECIFICATIONS ELECTRICAL SPECIFICATIONS VSY = ±1.5 V, VCM = 0 V, TA = 25°C, unless otherwise noted. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Symbol Test Conditions/Comments Min Typ Max Unit −1.5 −2.5 +0.2 −40°C ≤ TA ≤ +125°C +1.5 +2.
PAGE 4
ADA4092-4 VSY = ±5.0 V, VCM = 0 V, TA = 25°C, unless otherwise noted. Table 3. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Symbol Test Conditions/Comments Min Typ Max Unit −1.5 −2.5 +0.2 −40°C ≤ TA ≤ +125°C +1.5 +2.
PAGE 5
ADA4092-4 VSY = ±15.0 V, VCM = 0 V, VO = 0 V, TA = 25°C, unless otherwise noted. Table 4. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current Symbol Test Conditions/Comments Min Typ Max Unit −1.5 −2.5 +0.2 −40°C ≤ TA ≤ +125°C +1.5 +2.
PAGE 6
ADA4092-4 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 5. Parameter Supply Voltage Input Voltage Differential Input Voltage Input Current Output Short-Circuit Duration to GND Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature (Soldering, 60 sec) θJA is specified for the device soldered on a 4-layer JEDEC standard printed circuit board (PCB) with zero airflow.
PAGE 7
ADA4092-4 TYPICAL PERFORMANCE CHARACTERISTICS 180 40 100 80 60 40 30 25 20 15 10 1200 OFFSET VOLTAGE (µV) –2 –1 Figure 2. Input Offset Voltage Distribution, 3 V 1 2 3 4 TCVOS (μV/°C) 5 6 7 8 6 7 8 6 7 8 Figure 5.
PAGE 8
ADA4092-4 60 600 500 40 20 ADA4092-4 VSY = ±1.5V TA = 25°C 300 IB (nA) VOS (µV) 400 ADA4092-4 VSY = ±1.5V T = 25°C IOS IB– 0 200 –20 100 –1.0 –0.5 0 0.5 1.0 1.5 VCM (V) –40 –1.5 08803-008 0 –1.5 –1.0 –0.5 0 0.5 1.0 1.5 VCM (V) Figure 8. Input Offset Voltage vs. Common-Mode Voltage, 3 V Figure 11. Input Bias Current vs.
PAGE 9
ADA4092-4 120 10k ADA4092-4 VSY = ±1.5V TA = 25°C GAIN (dB) AND PHASE (Degrees) 100 100 VDD – VOH VOL – VSS 10 PHASE 80 60 40 GAIN 20 0 –20 ADA4092-4 VSY = ±1.5V TA = 25°C –40 –60 0.1 1 10 100 LOAD CURRENT (mA) 1k 1M 10M Figure 17. Open-Loop Gain and Phase vs. Frequency, 3 V 120 10k ADA4092-4 VSY = ±5V TA = 25°C 100 VDD – VOH VOL – VSS 10 PHASE 80 60 40 GAIN 20 0 –20 –40 ADA4092-4 VSY = ±5V TA = 25°C –60 –80 0.01 0.1 1 10 100 LOAD CURRENT (mA) –100 08803-015 1 0.
PAGE 10
ADA4092-4 50 ADA4092-4 VSY = ±1.5V TA = 25°C 100 30 GAIN = +10 ZOUT (Ω) 20 10 AV = +100 10 AV = +10 GAIN = +1 0 1 AV = +1 –10 0.1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 10 08803-020 –20 100 1k 10k 100k 1M 10M FREQUENCY (Hz) 08803-023 CLOSED-LOOP GAIN (dB) 1k ADA4092-4 VSY = ±1.5V TA = 25°C GAIN = +100 40 Figure 23. Closed-Loop Output Impedance vs. Frequency, 3 V Figure 20. Closed-Loop Gain vs.
PAGE 11
ADA4092-4 90 120 80 100 70 80 PSRR+ PSRR (dB) CMRR (dB) 60 50 40 30 ADA4092-4 VSY = ±1.5V TA = 25°C 60 40 PSRR– 20 1k 10k 100k 1M 10M FREQUENCY (Hz) –20 100 08803-026 0 100 1k 10k 100k 1M 10M 08803-029 10 ADA4092-4 VSY = ±1.5V TA = 25°C 1M 10M 08803-030 0 10M 08803-031 20 FREQUENCY (Hz) Figure 29. PSRR vs. Frequency, 3 V Figure 26. CMRR vs.
PAGE 12
ADA4092-4 2.0 0.06 1.5 0.04 1.0 0.02 0 ADA4092-4 VSY = ±1.5V TA = 25°C RL = 100kΩ CL = 100pF –1.0 –0.04 –1.5 0 20 10 40 30 50 60 70 80 TIME (µs) –0.06 08803-032 –2.0 ADA4092-4 VSY = ±1.5V TA = 25°C RL = 100kΩ CL = 100pF –0.02 0 6 0.06 4 0.04 2 0.02 0 ADA4092-4 VSY = ±5V TA = 25°C RL = 100kΩ CL = 100pF 60 100 80 120 140 160 TIME (µs) –0.06 08803-033 –6 40 10 12 14 16 18 16 18 ADA4092-4 VSY = ±5V TA = 25°C RL = 100kΩ CL = 100pF –0.04 20 8 0 –0.
PAGE 13
1.4 –0.2 1.2 –0.4 1.0 –0.6 0.8 ADA4092-4 VSY = ±1.5V TA = 25°C 0.6 –0.8 –1.0 0.4 –1.2 0.2 –1.4 0 0 10 20 30 40 ADA4092-4 VSY = ±1.5V TA = 25°C 60 50 70 80 90 TIME (µs) –1.6 0 10 20 40 30 60 50 70 90 80 100 TIME (µs) Figure 38. Positive Overload Recovery, 3 V 08803-041 0 VOUT (V) 1.6 08803-038 VOUT (V) ADA4092-4 Figure 41.
PAGE 14
ADA4092-4 0.5 1000 ADA4092-4 VSY = ±15V TA = 25°C 0.4 ADA4092-4 VSY = ±15V T = 25°C 0.3 en (nV/√Hz) VOUT (µV) 0.2 0.1 0 100 –0.1 –0.2 1 2 3 4 6 5 7 8 9 10 TIME (µs) 10 0.01 10 100 1000 50k Figure 46. Voltage Noise Density 200 –50 180 –60 CHANNEL SEPARATION (dB) 160 140 120 100 80 ADA4092-4 TA = 25°C 40 –70 –80 –90 –100 –110 –120 ADA4092-4 VSY = ±1.
PAGE 15
ADA4092-4 THEORY OF OPERATION A common practice in bipolar amplifiers to protect the input transistors from large differential voltages is to include series resistors and differential diodes. See Figure 49 for the full input protection circuitry. These diodes turn on whenever the differential voltage exceeds approximately 0.6 V. In this condition, current flows between the input pins, limited only by the two 5 kΩ resistors.
PAGE 16
ADA4092-4 INPUT OVERVOLTAGE PROTECTION The ADA4092-4 has two different ESD circuits for enhanced protection, as shown in Figure 49. +V D3 R1 D7 R2 D8 D6 D1 D2 D5 D4 Additional resistance can be added externally in series with each input to protect against higher peak voltages; however, the additional thermal noise of the resistors must be considered. 08803-123 –V Figure 49.
PAGE 17
ADA4092-4 OUTLINE DIMENSIONS 5.10 5.00 4.90 14 8 4.50 4.40 4.30 6.40 BSC 1 7 PIN 1 0.65 BSC 0.15 0.05 COPLANARITY 0.10 1.20 MAX 0.30 0.19 0.20 0.09 SEATING PLANE 8° 0° 0.75 0.60 0.45 COMPLIANT TO JEDEC STANDARDS MO-153-AB-1 061908-A 1.05 1.00 0.80 Figure 52.
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ADA4092-4 NOTES Rev.
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ADA4092-4 NOTES Rev.