Analog Devices AD822 Datasheet

OUT1

–IN1

+IN1

V–

V+

OUT2

–IN2

+IN2

AD822

Single Supply, Rail-to-Rail

FEATURES TRUE SINGLE SUPPLY OPERATION

Output Swings Rail to Rail Input Voltage Range Extends Below Ground Single Supply Capability from +3 V to +36 V Dual Supply Capability from 61.5 V to 618 V

HIGH LOAD DRIVE

Capacitive Load Drive of 350 pF, G = 1 Minimum Output Current of 15 mA

EXCELLENT AC PERFORMANCE FOR LOW POWER

800 mA Max Quiescent Current per Amplifier Unity Gain Bandwidth: 1.8 MHz Slew Rate of 3.0 V/ms

GOOD DC PERFORMANCE

800 mV Max Input Offset Voltage 2 mV/8C Typ Offset Voltage Drift 25 pA Max Input Bias Current

LOW NOISE

13 nV/√

NO PHASE INVERSION APPLICATIONS

Battery Powered Precision Instrumentation Photodiode Preamps Active Filters 12- to 14-Bit Data Acquisition Systems Medical Instrumentation Low Power References and Regulators

PRODUCT DESCRIPTION

The AD822 is a dual precision, low power FET input op amp that can operate from a single supply of +3.0 V to 36 V, or dual supplies of ±1.5 V to ±18 V. It has true single supply

Hz @ 10 kHz

100

Low Power FET-Input Op Amp

AD822

CONNECTION DIAGRAM

8-Pin Plastic DIP, Cerdip and SOIC

capability with an input voltage range extending below the negative rail, allowing the AD822 to accommodate input signals below ground in the single supply mode. Output voltage swing extends to within 10 mV of each rail providing the maximum output dynamic range.

Offset voltage of 800 µV max, offset voltage drift of 2 µV/°C, input bias currents below 25 pA and low input voltage noise provide dc precision with source impedances up to a Gigaohm.

1.8 MHz unity gain bandwidth, –93 dB THD at 10 kHz and 3 V/µs slew rate are provided with a low supply current of 800 µA per amplifier. The AD822 drives up to 350 pF of direct capacitive load as a follower, and provides a minimum output current of 15 mA. This allows the amplifier to handle a wide range of load conditions. This combination of ac and dc performance, plus the outstanding load drive capability, results in an exceptionally versatile amplifier for the single supply user.

The AD822 is available in four performance grades. The A and B grades are rated over the industrial temperature range of –40°C to +85°C. There is also a 3 volt grade—the AD822A-3V, rated over the industrial temperature range. The mil grade is rated over the military temperature range of –55°C to +125°C and is available processed on standard military drawing.

The AD822 is offered in three varieties of 8-pin package: plastic DIP, hermetic cerdip and surface mount (SOIC) as well as die form.

1V 20µ

INPUT VOLTAGE NOISE – nV/√Hz

10 100 10k1k

Input Voltage Noise vs. Frequency

REV. A

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

FREQUENCY – Hz

Gain of +2 Amplifier; VS = +5, 0, VIN = 2.5 V Sine Centered at 1.25 Volts, R

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703

OUT

(GND)

100 90

10 0%

= 100 k

Ω

AD822–SPECIFICA TIONS

(VS = 0, 5 volts @ TA = +258C, VCM = 0 V, V

AD822A AD822B AD822S

= 0.2 V unless otherwise noted)

OUT

Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Units

DC PERFORMANCE

Initial Offset 0.1 0.8 0.1 0.4 0.1 0.8 mV Max Offset over Temperature 0.5 1.2 0.5 0.9 0.5 mV Offset Drift 2 2 2 µV/°C Input Bias Current VCM = 0 V to 4 V 2 25 2 10 2 25 pA

at T

MAX

Input Offset Current 2 20 2 10 2 20 pA

at T

MAX

Open-Loop Gain VO = 0.2 V to 4 V

0.5 5 0.5 2.5 0.5 nA

0.5 0.5 1.5 nA

RL = 100 k 500 1000 500 1000 500 1000 V/mV

to T

MIN

MAX

to T

MIN

MAX

to T

MIN

MAX

RL = 10 k 80 150 80 150 80 150 V/mV RL = 1 k 15 30 15 30 15 30 V/mV

400 400 V/mV 80 80 V/mV 10 10 V/mV

NOISE/HARMONIC PERFORMANCE

Input Voltage Noise

0.1 Hz to 10 Hz 2 2 2 µV p-p f = 10 Hz 25 25 25 nV/√Hz f = 100 Hz 21 21 21 nV/√Hz f = 1 kHz 16 16 16 nV/√Hz f = 10 kHz 13 13 13 nV/√Hz

Input Current Noise

0.1 Hz to 10 Hz 18 18 18 fA p-p f = 1 kHz 0.8 0.8 0.8 fA/√Hz

Harmonic Distortion RL = 10 k to 2.5 V

f = 10 kHz VO = 0.25 V to 4.75 V –93 –93 –93 dB

DYNAMIC PERFORMANCE

Unity Gain Frequency 1.8 1.8 1.8 MHz Full Power Response VO p-p = 4.5 V 210 210 210 kHz Slew Rate 3 3 3 V/µs Settling Time

to 0.1% VO = 0.2 V to 4.5 V 1.4 1.4 1.4 µs to 0.01% 1.8 1.8 1.8 µs

MATCHING CHARACTERISTICS

Initial Offset 1.0 0.5 1.6 mV Max Offset Over Temperature 1.6 1.3 mV

Offset Drift 3 3 µV/°C Input Bias Current 20 10 20 pA Crosstalk @ f = 1 kHz RL = 5 kΩ –130 –130 –130 dB

f = 100 kHz –93 –93 –93 dB

INPUT CHARACTERISTICS

Common-Mode Voltage Range

to T

MIN

to T

MAX

CMRR VCM = 0 V to +2 V 66 80 69 80 66 80 dB

T Input Impedance

–0.2 4 –0.2 4 –0.2 4 V –0.2 4 –0.2 4 V

66 66 dB

Differential 1013||0.5 1013||0.5 1013||0.5 Ω||pF

Common Mode 1013||2.8 1013||2.8 1013||2.8 Ω||pF

OUTPUT CHARACTERISTICS

Output Saturation Voltage VOL–V

to T

MIN

to T

to T to T

MAX

VCC–V

T VOL–V

T VCC–V

T VOL–V

T VCC–V

T Operating Output Current 15 15 15 mA

T Capacitive Load Drive 350 350 350 pF

= 20 µA 575757mV

SINK

= 20 µA 1014 1014 1014mV

SOURCE

= 2 mA 40 55 40 55 40 55 mV

SINK

= 2 mA 80 110 80 110 80 110 mV

SOURCE

= 15 mA 300 500 300 500 300 500 mV

SINK

= 15 mA 800 1500 800 1500 800 1500 mV

SOURCE

10 10 mV 20 20 mV 80 80 mV 160 160 mV 1000 1000 mV 1900 1900 mV

12 12 mA

POWER SUPPLY

Quiescent Current T Power Supply Rejection VS+ = 5 V to 15 V 70 80 66 80 70 80 dB

to T

MIN

MAX

MIN

to T

MAX

1.24 1.6 1.24 1.6 1.24 mA

70 66 dB

–2–

REV. A

(VS = 65 volts @ TA = +258C, VCM = 0 V, V

= 0 V unless otherwise noted)

OUT

AD822A AD822B AD822S

AD822

Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Units

DC PERFORMANCE

Initial Offset 0.1 0.8 0.1 0.4 0.1 mV Max Offset over Temperature 0.5 1.5 0.5 1 0.5 mV Offset Drift 2 2 2 µV/°C Input Bias Current VCM = –5 V to 4 V 2 25 2 10 2 25 pA

at T

MAX

Input Offset Current 2 20 2 10 2 pA

at T

MAX

Open-Loop Gain VO = –4 V to 4 V

0.5 5 0.5 2.5 0.5 nA

0.5 0.5 1.5 nA

RL = 100 k 400 1000 400 1000 400 1000 V/mV

to T

MIN

MAX

to T

MIN

MAX

to T

MIN

MAX

RL = 10 k 80 150 80 150 80 150 V/mV RL = 1 k 20 30 20 30 20 30 V/mV

400 400 V/mV 80 80 V/mV 10 10 V/mV

NOISE/HARMONIC PERFORMANCE

Input Voltage Noise

0.1 Hz to 10 Hz 2 2 2 µV p-p f = 10 Hz 25 25 25 nV/√Hz f = 100 Hz 21 21 21 nV/√Hz f = 1 kHz 16 16 16 nV/√Hz f = 10 kHz 13 13 13 nV/√Hz

Input Current Noise

0.1 Hz to 10 Hz 18 18 18 fA p-p f = 1 kHz 0.8 0.8 0.8 fA/√Hz

Harmonic Distortion RL = 10 k

f = 10 kHz VO = ±4.5 V –93 –93 –93 dB

DYNAMIC PERFORMANCE

Unity Gain Frequency 1.9 1.9 1.9 MHz Full Power Response VO p-p = 9 V 105 105 105 kHz Slew Rate 3 3 3 V/µs Settling Time

to 0.1% VO = 0 V to ± 4.5 V 1.4 1.4 1.4 µs to 0.01% 1.8 1.8 1.8 µs

MATCHING CHARACTERISTICS

Initial Offset 1.0 0.5 1.6 mV Max Offset Over Temperature 3 2 2 mV

Offset Drift 3 3 µV/°C Input Bias Current 25 10 25 pA Crosstalk @ f = 1 kHz RL = 5 kΩ –130 –130 –130 dB

f = 100 kHz –93 –93 –93 dB

INPUT CHARACTERISTICS

Common-Mode Voltage Range

to T

MIN

to T

MAX

CMRR VCM = –5 V to +2 V 66 80 69 80 66 80 dB

T Input Impedance

–5.2 4 –5.2 4 –5.2 4 V –5.2 4 –5.2 4 V

66 66 dB

Differential 1013||0.5 1013||0.5 1013||0.5 Ω||pF

Common Mode 1013||2.8 1013||2.8 1013||2.8 Ω||pF

OUTPUT CHARACTERISTICS

Output Saturation Voltage VOL–V

to T

MIN

to T

to T to T

MAX

VCC–V

T VOL–V

T VCC–V

T VOL–V

T VCC–V

T Operating Output Current 15 15 15 mA

T Capacitive Load Drive 350 350 350 pF

= 20 µA 575757mV

SINK

= 20 µA 1014 1014 1014mV

SOURCE

= 2 mA 40 55 40 55 40 55 mV

SINK

= 2 mA 80 110 80 110 80 110 mV

SOURCE

= 15 mA 300 500 300 500 300 500 mV

SINK

= 15 mA 800 1500 800 1500 800 1500 mV

SOURCE

10 10 mV 20 20 mV 80 80 mV 160 160 mV 1000 1000 mV 1900 1900 mV

12 12 mA

POWER SUPPLY

Quiescent Current T Power Supply Rejection VS+ = 5 V to 15 V 70 80 66 80 70 80 dB

to T

MIN

MAX

MIN

to T

MAX

1.3 1.6 1.3 1.6 1.3 mA

70 66 dB

REV. A

–3–

AD822–SPECIFICATIONS

(VS = 615 volts @ TA = +258C, VCM = 0 V, V

AD822A AD822B AD822S

= 0 V unless otherwise noted)

OUT

Parameter Conditions Min Typ Max Min Typ Max Min Typ Max Units

DC PERFORMANCE

Initial Offset 0.4 2 0.3 1.5 0.4 2.0 mV Max Offset over Temperature 0.5 3 0.5 2.5 0.5 mV Offset Drift 2 2 2 µV/°C Input Bias Current VCM = 0 V 2 25 2 12 2 25 pA

VCM = –10 V 40 40 40 pA

at T

MAX

Input Offset Current 2 20 2 12 2 20 pA

at T

MAX

Open-Loop Gain VO = +10 V to –10 V

VCM = 0 V 0.5 5 0.5 2.5 0.5 nA

0.5 0.5 1.5 nA

RL = 100 k 500 2000 500 2000 500 2000 V/mV

to T

MIN

MAX

to T

MIN

MAX

to T

MIN

MAX

RL = 10 k 100 500 100 500 150 400 V/mV RL = 1 k 30 45 30 45 30 45 V/mV

500 500 V/mV 100 100 V/mV 20 20 V/mV

NOISE/HARMONIC PERFORMANCE

Input Voltage Noise

0.1 Hz to 10 Hz 2 2 2 µV p-p f = 10 Hz 25 25 25 nV/√Hz f = 100 Hz 21 21 21 nV/√Hz f = 1 kHz 16 16 16 nV/√Hz f = 10 kHz 13 13 13 nV/√Hz

Input Current Noise

0.1 Hz to 10 Hz 18 18 18 fA p-p f = 1 kHz 0.8 0.8 0.8 fA/√Hz

Harmonic Distortion RL = 10 k

f = 10 kHz VO = ±10 V –85 –85 –85 dB

DYNAMIC PERFORMANCE

Unity Gain Frequency 1.9 1.9 1.9 MHz Full Power Response VO p-p = 20 V 45 45 45 kHz Slew Rate 3 3 3 V/µs Settling Time

to 0.1% VO = 0 V to ± 10 V 4.1 4.1 4.1 µs to 0.01% 4.5 4.5 4.5 µs

MATCHING CHARACTERISTICS

Initial Offset 3 2 0.8 mV Max Offset Over Temperature 4 2.5 1.0 mV

Offset Drift 3 3 µV/°C Input Bias Current 25 12 25 pA Crosstalk @ f = 1 kHz RL = 5 kΩ –130 –130 –130 dB

f = 100 kHz –93 –93 –93 dB

INPUT CHARACTERISTICS

Common-Mode Voltage Range

to T

MIN

to T

MAX

CMRR VCM = –15 V to 12 V 70 80 74 90 70 90 dB

T Input Impedance

–15.2 14 –15.2 14 –15.2 14 V –15.2 14 –15.2 14 V

70 74 dB

Differential 1013||0.5 1013||0.5 1013||0.5 Ω||pF

Common Mode 1013||2.8 1013||2.8 1013||2.8 Ω||pF

OUTPUT CHARACTERISTICS

Output Saturation Voltage VOL–V

to T

MIN

to T

to T to T

MAX

VCC–V

T VOL–V

T VCC–V

T VOL–V

T VCC–V

T Operating Output Current 20 20 20 mA

T Capacitive Load Drive 350 350 350 pF

= 20 µA 575757mV

SINK

= 20 µA 1014 1014 1014mV

SOURCE

= 2 mA 40 55 40 55 40 55 mV

SINK

= 2 mA 80 110 80 110 80 110 mV

SOURCE

= 15 mA 300 500 300 500 300 500 mV

SINK

= 15 mA 800 1500 800 1500 800 1500 mV

SOURCE

10 10 mV 20 20 mV 80 80 mV 160 160 mV 1000 1000 mV 1900 1900 mV

15 15 mA

POWER SUPPLY

Quiescent Current T Power Supply Rejection VS+ = 5 V to 15 V 70 80 70 80 70 80 dB

to T

MIN

MAX

MIN

to T

MAX

1.4 1.8 1.4 1.8 1.4 mA

70 70 dB

–4–

REV. A

(VS = 0, 3 volts @ TA = +258C, VCM = 0 V, V

= 0.2 V unless otherwise noted)

OUT

AD822

AD822A-3 V

Parameter Conditions Min Typ Max Units

DC PERFORMANCE

Initial Offset 0.2 1 mV Max Offset over Temperature 0.5 1.5 mV Offset Drift 1 µV/°C Input Bias Current VCM = 0 V to +2 V 2 25 pA

at T

MAX

Input Offset Current 220 pA

at T

MAX

Open-Loop Gain VO = 0.2 V to 2 V

0.5 5 nA

0.5 nA

RL = 100 k 300 1000 V/mV

to T

MIN

MAX

to T

MIN

MAX

to T

MIN

MAX

RL = 10 k 60 150 V/mV RL = 1 k 10 30 V/mV

300 V/mV 60 V/mV 8 V/mV

NOISE/HARMONIC PERFORMANCE

Input Voltage Noise

0.1 Hz to 10 Hz 2 µV p-p f = 10 Hz 25 nV/√Hz f = 100 Hz 21 nV/√Hz f = 1 kHz 16 nV/√Hz f = 10 kHz 13 nV/√Hz

Input Current Noise

0.1 Hz to 10 Hz 18 fA p-p f = 1 kHz 0.8 fA/√Hz

Harmonic Distortion RL = 10 k to 1.5 V

f = 10 kHz VO = ±1.25 V –92 dB

DYNAMIC PERFORMANCE

Unity Gain Frequency 1.5 MHz Full Power Response VO p-p = 2.5 V 240 kHz Slew Rate 3V/µs Settling Time

to 0.1% VO = 0.2 V to 2.5 V 1 µs to 0.01% 1.4 µs

MATCHING CHARACTERISTICS

Initial Offset 1mV Max Offset Over Temperature 2mV

Offset Drift 2 µV/°C Input Bias Current 10 pA Crosstalk @ f = 1 kHz RL = 5 kΩ –130 dB

f = 100 kHz –93 dB

INPUT CHARACTERISTICS

Common-Mode Voltage Range

to T

MIN

to T

MAX

CMRR VCM = 0 V to +1 V 60 74 dB

T Input Impedance

–0.2 2 V –0.2 2 V

60 dB

Differential 1013||0.5 Ω||pF

Common Mode 1013||2.8 Ω||pF

OUTPUT CHARACTERISTICS

Output Saturation Voltage VOL–V

to T

MIN

to T

to T to T

MAX

VCC–V

T VOL–V

T VCC–V

T VOL–V

T VCC–V

T Operating Output Current 15 mA

T Capacitive Load Drive 350 pF

= 20 µA57mV

SINK

= 20 µA1014mV

SOURCE

= 2 mA 40 55 mV

SINK

= 2 mA 80 110 mV

SOURCE

= 10 mA 200 400 mV

SINK

= 10 mA 500 1000 mV

SOURCE

10 mV 20 mV 80 mV 160 mV 400 mV 1000 mV

12 mA

POWER SUPPLY

Quiescent Current T Power Supply Rejection VS+ = 3 V to 15 V 70 80 dB

to T

MIN

MAX

MIN

to T

MAX

1.24 1.6 mA

70 dB

REV. A

–5–

+ 11 hidden pages