Analog Devices AD623BR-REEL7, AD623BR-REEL, AD623BR, AD623BN, AD623ARM-REEL7 Datasheet

a		Single Supply, Rail-to-Rail, Low Cost
		Instrumentation Amplifier
		AD623

FEATURES Easy to Use

Higher Performance than Discrete Design Single and Dual Supply Operation Rail-to-Rail Output Swing

Input Voltage Range Extends 150 mV Below Ground (Single Supply)

Low Power, 575 mA Max Supply Current

Gain Set with One External Resistor Gain Range 1 (No Resistor) to 1,000

HIGH ACCURACY DC PERFORMANCE 0.1% Gain Accuracy (G = 1)

0.35% Gain Accuracy (G > 1)

25 ppm Gain Drift (G = 1)

200 mV Max Input Offset Voltage (AD623A) 2 mV/8C Max Input Offset Drift (AD623A) 100 mV Max Input Offset Voltage (AD623B) 1 mV/8C Max Input Offset Drift (AD623B)

25 nA Max Input Bias Current

NOISE

35 nV/ÖHz RTI Noise @ 1 kHz (G = 1)

EXCELLENT AC SPECIFICATIONS

90 dB Min CMRR (G = 10); 84 dB Min CMRR (G = 5) (@ 60 Hz, 1K Source Imbalance)

800 kHz Bandwidth (G = 1)

20 ms Settling Time to 0.01% (G = 10)

APPLICATIONS

Low Power Medical Instrumentation

Transducer Interface

Thermocouple Amplifier

Industrial Process Controls

Difference Amplifier

Low Power Data Acquisition

PRODUCT DESCRIPTION

The AD623 is an integrated single supply instrumentation amplifier that delivers rail-to-rail output swing on a single supply (+3 V to +12 V supplies). The AD623 offers superior user flexibility by allowing single gain set resistor programming, and conforming to the 8-lead industry standard pinout configuration. With no external resistor, the AD623 is configured for unity gain (G = 1) and with an external resistor, the AD623 can be programmed for gains up to 1,000.

The AD623 holds errors to a minimum by providing superior AC CMRR that increases with increasing gain. Line noise, as well as line harmonics, will be rejected since the CMRR remains constant up to 200 Hz. The AD623 has a wide input

REV. C

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.

CONNECTION DIAGRAM

8-Lead Plastic DIP (N),

SOIC (R) and mSOIC (RM) Packages

2RG	1	8	1RG
2IN	2	7	1VS
1IN	3	6	OUTPUT
2VS	4	5	REF
		AD623

common-mode range and can amplify signals that have a common-mode voltage 150 mV below ground. Although the design of the AD623 has been optimized to operate from a single supply, the AD623 still provides superior performance when operated from a dual voltage supply (±2.5 V to ±6.0 V).

Low power consumption (1.5 mW at 3 V), wide supply voltage range, and rail-to-rail output swing make the AD623 ideal for battery powered applications. The rail-to-rail output stage maximizes the dynamic range when operating from low supply voltages. The AD623 replaces discrete instrumentation amplifier designs and offers superior linearity, temperature stability and reliability in a minimum of space. Until the AD623, this level of instrumentation amplifier performance has not been achieved.

	120
	110
	100				x1000
	90				x100
dB
	80
–
CMR	70
					x10
	60
	50
	40				x1
	30	10	100	1k	10k	100k
	1
			FREQUENCY – Hz

Figure 1. CMR vs. Frequency, +5 VS, 0 VS

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: [phone]	World Wide Web Site: http://www.analog.com
Fax: [phone]	© Analog Devices, Inc., 1999

AD623–SPECIFICATIONS

SINGLE SUPPLY (typical @ +258C Single Supply, VS = +5 V, and RL = 10 kV, unless otherwise noted)

Model			AD623A			AD623ARM			AD623B
Specification	Conditions	Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Units
GAIN	G = 1 + (100 k/RG)
Gain Range		1		1000	1		1000	1		1000
Gain Error1	G1 VOUT =
	0.05 V to 3.5 V
	G > 1 VOUT =
	0.05 V to 4.5 V
G = 1			0.03	0.10		0.03	0.10		0.03	0.05	%
G = 10			0.10	0.35		0.10	0.35		0.10	0.35	%
G = 100			0.10	0.35		0.10	0.35		0.10	0.35	%
G = 1000			0.10	0.35		0.10	0.35		0.10	0.35	%
Nonlinearity,	G1 VOUT =
	0.05 V to 3.5 V
	G > 1 VOUT =
	0.05 V to 4.5 V
G = 1–1000			50			50			50		ppm
Gain vs. Temperature											ppm/°C
G = 1			5	10		5	10		5	10
G > 11			50			50			50		ppm/°C
VOLTAGE OFFSET	Total RTI Error =
	VOSI + VOSO/G										μV
Input Offset, VOSI			25	200		200	500		25	100
Over Temperature				350			650			160	μV
Average TC			0.1	2		0.1	2		0.1	1	μV/°C
Output Offset, VOSO			200	1000		500	2000		200	500	μV
Over Temperature				1500			2600			1100	μV
Average TC			2.5	10		2.5	10		2.5	10	μV/°C
Offset Referred to the Input
vs. Supply (PSR)
G = 1		80	100		80	100		80	100		dB
G = 10		100	120		100	120		100	120		dB
G = 100		120	140		120	140		120	140		dB
G = 1000		120	140		120	140		120	140		dB
INPUT CURRENT
Input Bias Current			17	25		17	25		17	25	nA
Over Temperature				27.5			27.5			27.5	nA
Average TC			25			25			25		pA/°C
Input Offset Current			0.25	2		0.25	2		0.25	2	nA
Over Temperature				2.5			2.5			2.5	nA
Average TC			5			5			5		pA/°C
INPUT
Input Impedance											GΩipF
Differential			2i2			2i2			2i2
Common-Mode			2i2			2i2			2i2		GΩipF
Input Voltage Range2	VS = +3 V to +12 V	(–VS) – 0.15		(+VS) – 1.5	(–VS) – 0.15		(+VS) – 1.5	(–VS) – 0.15		(+VS) – 1.5	V
Common-Mode Rejection at
60 Hz with 1 kΩ Source
Imbalance
G = 1	VCM = 0 V to 3 V	70	80		70	80		77	86		dB
G = 10	VCM = 0 V to 3 V	90	100		90	100		94	100		dB
G = 100	VCM = 0 V to 3 V	105	110		105	110		105	110		dB
G = 1000	VCM = 0 V to 3 V	105	110		105	110		105	110		dB
OUTPUT	RL = 10 kΩ
Output Swing		+0.01		(+VS) – 0.5	+0.01		(+VS) – 0.5	+0.01		(+VS) – 0.5	V
	RL = 100 kΩ	+0.01		(+VS) – 0.15	+0.01		(+VS) – 0.15	+0.01		(+VS) – 0.15	V
DYNAMIC RESPONSE
Small Signal –3 dB
Bandwidth
G = 1			800			800			800		kHz
G = 10			100			100			100		kHz
G = 100			10			10			10		kHz
G = 1000			2			2			2		kHz
Slew Rate			0.3			0.3			0.3		V/μs
Settling Time to 0.01%	VS = +5 V										μs
G = 1	Step Size: 3.5 V		30			30			30
G = 10	Step Size: 4 V,										μs
	VCM = 1.8 V		20			20			20

–2–

REV. C

DUAL SUPPLIES (typical @ +258C Dual Supply, VS = 65 V, and RL = 10 kV, unless otherwise noted)										AD623
Model		AD623A			AD623ARM				AD623B
Specification	Conditions	Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Units
GAIN	G = 1 + (100 k/RG)
Gain Range		1		1000	1		1000	1		1000
Gain Error1	G1 VOUT =
	–4.8 V to 3.5 V
	G > 1 VOUT =
	0.05 V to 4.5 V
G = 1			0.03	0.10		0.03	0.10		0.03	0.05	%
G = 10			0.10	0.35		0.10	0.35		0.10	0.35	%
G = 100			0.10	0.35		0.10	0.35		0.10	0.35	%
G = 1000			0.10	0.35		0.10	0.35		0.10	0.35	%
Nonlinearity,	G1 VOUT =
	–4.8 V to 3.5 V
	G > 1 VOUT =
	–4.8 V to 4.5 V
G = 1–1000			50			50			50		ppm
Gain vs. Temperature											ppm/°C
G = 1			5	10		5	10		5	10
G > 11			50			50			50		ppm/°C
VOLTAGE OFFSET	Total RTI Error =
	VOSI + VOSO/G										μV
Input Offset, VOSI			25	200		200	500		25	100
Over Temperature				350			650			160	μV
Average TC			0.1	2		0.1	2		0.1	1	μV/°C
Output Offset, VOSO			200	1000		500	2000		200	500	μV
Over Temperature				1500			2600			1100	μV
Average TC			2.5	10		2.5	10		2.5	10	μV/°C
Offset Referred to the Input
vs. Supply (PSR)
G = 1		80	100		80	100		80	100		dB
G = 10		100	120		100	120		100	120		dB
G = 100		120	140		120	140		120	140		dB
G = 1000		120	140		120	140		120	140		dB
INPUT CURRENT
Input Bias Current			17	25		17	25		17	25	nA
Over Temperature				27.5			27.5			27.5	nA
Average TC			25			25			25		pA/°C
Input Offset Current			0.25	2		0.25	2		0.25	2	nA
Over Temperature				2.5			2.5			2.5	nA
Average TC			5			5			5		pA/°C
INPUT
Input Impedance											GΩipF
Differential			2i2			2i2			2i2
Common-Mode	VS = +2.5 V to ±6 V		2i2			2i2			2i2		GΩipF
Input Voltage Range2		(–VS) – 0.15		(+VS) – 1.5	(–VS) –0.15		(+VS) – 1.5	(–VS) – 0.15		(+VS) – 1.5	V
Common-Mode Rejection at
60 Hz with 1 kΩ Source
Imbalance
G = 1	VCM = +3.5 V to –5.15 V	70	80		70	80		77	86		dB
G = 10	VCM = +3.5 V to –5.15 V	90	100		90	100		94	100		dB
G = 100	VCM = +3.5 V to –5.15 V	105	110		105	110		105	110		dB
G = 1000	VCM = +3.5 V to –5.15 V	105	110		105	110		105	110		dB
OUTPUT	RL = 10 kΩ, VS = ±5 V
Output Swing		(–VS) +0. 2		(+VS) – 0.5	(–VS) + 0.2		(+VS) – 0.5	(–VS) + 0.2		(+VS) – 0.5	V
	RL = 100 kΩ	(–VS) + 0.05		(+VS) – 0.15	(–VS) + 0.05		(+VS) – 0.15	(–VS) + 0.05		(+VS) – 0.15	V
DYNAMIC RESPONSE
Small Signal –3 dB
Bandwidth
G = 1			800			800			800		kHz
G = 10			100			100			100		kHz
G = 100			10			10			10		kHz
G = 1000			2			2			2		kHz
Slew Rate	VS = ±5 V, 5 V Step		0.3			0.3			0.3		V/μs
Settling Time to 0.01%											μs
G = 1			30			30			30
G = 10			20			20			20		μs

REV. C

–3–

AD623–SPECIFICATIONS

BOTH DUAL AND SINGLE SUPPLIES

Model

AD623A

AD623ARM

AD623B

Specification

Conditions

Min Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

NOISE

æ e

ö 2

+

æ e

ö 2

Voltage Noise, 1 kHz

Total RTI Noise =

/G

Input, Voltage Noise, eni

è

ni ø

è no

ø

35

35

35

nV/ÖHz

Output, Voltage Noise, eno

50

50

50

nV/ÖHz

RTI, 0.1 Hz to 10 Hz

G = 1

3.0

3.0

3.0

mV p-p

G = 1000

1.5

1.5

1.5

mV p-p

Current Noise

f = 1 kHz

100

100

100

fA/ÖHz

0.1 Hz to 10 Hz

1.5

1.5

1.5

pA p-p

REFERENCE INPUT

RIN

100

± 20%

100

± 20%

100

± 20%

kW

IIN

VIN+, VREF = 0

+50

+60

+50

+60

+50

+60

mA

Voltage Range

–VS

+VS

–VS

+VS

–VS

+VS

V

Gain to Output

1 ± 0.0002

1 ± 0.0002

1 ± 0.0002

V

POWER SUPPLY

Operating Range

Dual Supply

± 2.5

± 6

± 2.5

± 6

± 2.5

± 6

V

Single Supply

+2.7

+12

+2.7

+12

+2.7

+12

V

Quiescent Current

Dual Supply

375

550

375

550

375

550

mA

Single Supply

305

480

305

480

305

480

mA

Over Temperature

625

625

625

mA

TEMPERATURE RANGE

For Specified Performance

–40 to +85

–40 to +85

–40 to +85

°C

NOTES

1Does not include effects of external resistor RG. 2One input grounded. G = 1.

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS1

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6 V

Internal Power Dissipation2 . . . . . . . . . . . . . . . . . . . . 650 mW

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . ±6 V

Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite

Storage Temperature Range

(N, R, RM) . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C

Operating Temperature Range

(A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Lead Temperature Range	+300°C
(Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . .

NOTES

1Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

2Specification is for device in free air: 8-Lead Plastic DIP Package: qJA = 95°C/W 8-Lead SOIC Package: qJA = 155°C/W 8-Lead mSOIC Package: qJA = 200°C/W

ORDERING GUIDE

	Temperature	Package	Package	Brand
Model	Range	Description	Option	Code
AD623AN	–40°C to +85°C	8-Lead Plastic DIP	N-8
AD623AR	–40°C to +85°C	8-Lead SOIC	SO-8
AD623ARM	–40°C to +85°C	8-Lead μSOIC	RM-8	J0A
AD623AR-REEL	–40°C to +85°C	13" Tape and Reel	SO-8
AD623AR-REEL7	–40°C to +85°C	7" Tape and Reel	SO-8
AD623ARM-REEL	–40°C to +85°C	13" Tape and Reel	RM-8	J0A
AD623ARM-REEL7	–40°C to +85°C	7" Tape and Reel	RM-8	J0A
AD623BN	–40°C to +85°C	8-Lead Plastic DIP	N-8
AD623BR	–40°C to +85°C	8-Lead SOIC	SO-8
AD623BR-REEL	–40°C to +85°C	13" Tape and Reel	SO-8
AD623BR-REEL7	–40°C to +85°C	7" Tape and Reel	SO-8

ESD SUSCEPTIBILITY

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 volts, which readily accumulate on the human body and on test equipment, can discharge without detection. Although the AD623 features proprietary ESD protection circuitry, permanent damage may still occur on these devices if they are subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid any performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

–4–

REV. C

Typical Characteristics(@ +258C VS = 65 V, RL = 10 kV unless otherwise noted)–AD623

	300
	280
	260
	240
	220
	200
UNITS	180
	160
	140
	120
	100
	80
	60
	40
	20
	0
	–100 –80 –60 –40	–20 0	20	40	60	80	100	120	140
	INPUT OFFSET VOLTAGE –mV

Figure 2. Typical Distribution of Input Offset Voltage; Package Option N-8, SO-8

	480
	420
	360
UNITS	300
	240

180

120

60

0

–800 –600–400 –200

0

200

400

600

800

OUTPUT OFFSET VOLTAGE 2 mV

Figure 3. Typical Distribution of Output Offset Voltage; Package Option N-8, SO-8

	22
	20
	18
	16
UNITS	14
	10
	12

8

6

4

2

0

–80

–60 –40

–20

0

20

40

60

80

100

INPUT OFFSET VOLTAGE –mV

Figure 4. Typical Distribution of Input Offset Voltage, VS = +5, Single Supply, VREF = –0.125 V; Package Option N-8, SO-8

22

20

18

16

14

UNITS 12 10

8

6

4

2

0

–600–500–400–300 –200 –1000

100

200

300

400

500

OUTPUT OFFSET VOLTAGE –mV

Figure 5. Typical Distribution of Output Offset Voltage, VS = +5, Single Supply, VREF = –0.125 V; Package Option N-8, SO-8

		210
		180
		150
	UNITS	120
		90
		60

30

0

–0.245 –0.24 –0.235

–0.23

–0.225

–0.22

–0.215–0.21

INPUT OFFSET CURRENT – nA

Figure 6. Typical Distribution for Input Offset Current; Package Option N-8, SO-8

20
18
16
14
12
UNITS
10
8
6
4
2
0
–0.025 –0.02	–0.015	–0.01	–0.005	0	0.005	0.01
	INPUT OFFSET CURRENT – nA

Figure 7. Typical Distribution for Input Offset Current, VS = +5, Single Supply, VREF = –0.125 V; Package Option N-8, SO-8

REV. C

–5–