Analog Devices AD544, AD542, AD547 Datasheet

a		High Performance,
		BiFET Operational Amplifiers
		AD542/AD544/AD547

FEATURES

Ultralow Drift: 1 mV/8C (AD547L)

Low Offset Voltage: 0.25 mV (AD547L) Low Input Bias Currents: 25 pA max Low Quiescent Current: 1.5 mA

Low Noise: 2 mV p-p

High Open Loop Gain: 110 dB High Slew Rate: 13 V/ms Fast Settling to 60.01%: 3 ms

Low Total Harmonic Distortion: 0.0025% Available in Hermetic Metal Can and Die Form MIL-STD-883B Versions Available

Dual Versions Available: AD642, AD644, AD647

PRODUCT DESCRIPTION

The BiFET series of precision, monolithic FET-input op amps are fabricated with the most advanced BiFET and laser trimming technologies. The AD542, AD544, AD547 series offers bias currents significantly lower than currently available BiFET devices, 25 pA max, warmed up.

In addition, the offset voltage is laser trimmed to less than 0.25 mV on the AD547L, which is achieved by utilizing Analog Devices’ exclusive laser wafer trimming (LWT) process. When combined with the AD547’s low offset drift (1 μV/°C), these features offer the user performance superior to existing BiFET op amps at low BiFET pricing.

The AD542 or AD547 is recommended for any operational amplifier application requiring excellent dc performance at low to moderate cost. Precision instrument front ends requiring accurate amplification of millivolt level signals from megohm source impedances will benefit from the device’s excellent combination of low offset voltage and drift, low bias current and low 1/f noise. High common-mode rejection (80 dB, min on the “K” and “L” grades) and high open-loop gain, even under heavy loading, ensures better than “12-bit” linearity in high impedance buffer applications.

The AD544 is recommended for any op amp applications requiring excellent ac and dc performance at low cost. The

2 MHz bandwidth and low offset of the AD544 make it the first choice as an output amplifier for current output D/A converters, such as the AD7541, 12-bit CMOS DAC.

Devices in this series are available in four grades: the “J,” “K,” and “L” grades are specified over the 0°C to +70°C temperature range and the “S” grade over the –55°C to +125°C operating temperature range. All devices are offered in the hermetically sealed, TO-99 metal can package.

REV. B

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

		TAB
		8
NULL	1	7	+V
INVERTING	2	6	OUTPUT
INPUT
NONINVERTING	3	5	NULL
INPUT		4

–V

NOTE: PIN 4 CONNECTED TO CASE

PRODUCT HIGHLIGHTS

1.Improved bipolar and JFET processing results in the lowest bias current available in a monolithic FET op amp.

2.Analog Devices, unlike some manufacturers, specifies each device for the maximum bias current at either input in the warmed-up condition, thus assuring the user that the device will meet its published specifications in actual use.

3.Advanced laser wafer trimming techniques reduce offset voltage drift to 1 μV/°C max and offset voltage to only 0.25 mV max on the AD547L.

4.Low voltage noise (2 μV p-p) and low offset voltage drift enhance performance as a precision op amp.

5.High slew rate (13 V/μs) and fast settling time to 0.01% (3 μs) make the AD544 ideal for D/A, A/D, sample-hold circuits and high speed integrators.

6.Low harmonic distortion (0.0025%) make the AD544 an ideal choice in audio applications.

7.Bare die are available for use in hybrid circuit applications.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: [phone] Fax: [phone]

AD542/AD544/AD547–SPECIFICATIONS ( VS = 615 V @ TA = +258C unless otherwise noted)

		AD542			AD544			AD547
Parameter	Min	Typ	Max	Min	Typ	Max	Min	Typ	Max	Units

OPEN-LOOP GAIN1
VOUT = ±10 V, RL = 2 kΩ	100			30			100
J Grade										V/mV
K, L, S Grades	250			50			250			V/mV
TA = TMIN to TMAX
J Grade	100			20			100			V/mV
S Grade	100			20			100			V/mV
K, L Grades	250			40			250			V/mV
OUTPUT CHARACTERISTICS
RL = 2 kΩ	±10	±12		±10	±12		±10	±12
TA = TMIN to TMAX										V
RL = 10 kΩ	±12	±13		±12	±13		±12	±13
TA = TMIN to TMAX										V
Short Circuit Current		25			25			25		mA
FREQUENCY RESPONSE
Unity Gain, Small Signal		1.0			2.0			1.0		MHz
Full Power Response		50			200			50		kHz
Slew Rate, Unity Gain	2.0	3.0		8.0	13.0		2.0	3.0		V/μs
Total Harmonic Distortion					0.0025					%
INPUT OFFSET VOLTAGE2
J Grade			2.0			2.0			1.0	mV
K Grade			1.0			1.0			0.5	mV
L Grade			0.5			0.5			0.25	mV
S Grade			1.0			1.0			0.5	mV
vs. Temperature3										μV/°C
J Grade			20			20			5
K Grade			10			10			2	μV/°C
L Grade			5			5			1	μV/°C
S Grade			15			15			5	μV/°C
vs. Supply, TA = TMIN to TMAX									200	μV/V
J Grade			200			200
K, L, S Grades			100			100			100	μV/V
INPUT BIAS CURRENT4
Either Input
J Grade			50			50			50	pA
K, L, S Grades		10	25		10	25		10	25	pA
Input Offset Current
J Grade		5	15		5	15		5	15	pA
K, L, S Grades		2	15		2	15		2	15	pA
INPUT IMPEDANCE		1012i6			1012i6			1012i6		ΩipF
Differential
Common Mode		1012i3			1012i3			1012i3		ΩipF
INPUT VOLTAGE5		±20			±20			±20
Differential	±10			±10			±10			V
Common Mode		±12			±12			±12		V
Common-Mode Rejection
VIN = ±10 V	76			76			76
J Grade										dB
K, L, S Grades	80			80			80			dB

–2–

REV. B

AD542/AD544/AD547

AD542

AD544

AD547

Parameter

Min

Typ

Max

Min

Typ

Max

Min

Typ

Max

Units

POWER SUPPLY

± 15

± 15

± 15

Rated Performance

± 5

±18

± 5

±18

± 5

±18

V

Operating

V

Quiescent Current

1.1

1.5

1.8

2.5

1.1

1.5

mA

VOLTAGE NOISE

0.1 Hz to 10 Hz

mV p-p

J Grade

2.0

2.0

2.0

K, L, S Grades

2.0

2.0

4.0

mV p-p

10 Hz

70

35

70

nV/Ö

Hz

100 Hz

45

22

45

nV/Ö

Hz

1 kHz

30

18

30

nV/ÖHz

10 kHz

25

16

25

nV/Ö

Hz

TEMPERATURE RANGE

Operating, Rated Performance

°C

J, K, L Grades

0 to +70

0 to +70

0 to +70

S Grade

–55 to +125

–55 to +125

–55 to +125

°C

Storage

–65 to +150

–65 to +150

–65 to +150

°C

TRANSISTOR COUNT

29

29

29

NOTES

1Open-Loop Gain is specified with VOS both nulled and unnulled.

2Input Offset Voltage specifications are guaranteed after 5 minutes of operation at TA = +25°C.

3Input Offset Voltage Drift is specified with the offset voltage unnulled. Nulling will induce an additional 3 μV/°C/mV of nulled offset.

4Bias Current specifications are guaranteed at either input after 5 minutes of operation at T A = +25°C. For higher temperatures, the current doubles every 10°C. 5Defined as the maximum safe voltage between inputs, such that neither exceeds ± 10 V from ground.

Specifications subject to change without notice.

Specifications shown in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and max specifications are guaranteed, although only those shown in boldface are tested on all production units.

ORDERING GUIDE

	Initial	Offset	Settling Time
	Offset	Voltage	to 60.012% for	Package	Package
Model	Voltage	Drift	a 10 V Step	Description	Option
AD542JCHIPS	2.0 mV	20 mV/°C	5 ms	Bare Die
AD542JH	2.0 mV	20 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD542KH	1.0 mV	10 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD542LH	0.5 mV	5 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD542SH	1.0 mV	15 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD542SH/883B	1.0 mV	15 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD544JH	2.0 mV	20 mV/°C	3 ms	8-Pin Hermetic Metal Can	H-08A
AD544KH	1.0 mV	10 mV/°C	3 ms	8-Pin Hermetic Metal Can	H-08A
AD544LH	0.5 mV	5 mV/°C	3 ms	8-Pin Hermetic Metal Can	H-08A
AD544SH	1.0 mV	15 mV/°C	3 ms	8-Pin Hermetic Metal Can	H-08A
AD544SH/883B	1.0 mV	15 mV/°C	3 ms	8-Pin Hermetic Metal Can	H-08A
AD547JH	1.0 mV	5 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD547KH	0.5 mV	2 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD547LH	0.25 mV	1 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A
AD547SCHIPS	0.5 mV	5 mV/°C	5 ms	Bare Die
AD547SH/883B	0.5 mV	5 mV/°C	5 ms	8-Pin Hermetic Metal Can	H-08A

REV. B

–3–

AD542/AD544/AD547–Typical Characteristics

Figure 1. Input Voltage Range vs. Supply Voltage

Figure 4. Input Bias Current vs. Supply Voltage

Figure 7. Change in Offset Voltage vs. Warm-Up Time

Figure 2. Output Voltage Swing vs. Supply Voltage

Figure 5. Input Bias Current vs. Temperature

Figure 8. Open Loop Gain vs. Temperature

Figure 3. Output Voltage Swing vs. Load Resistance

Figure 6. Input Bias Current vs. CMV

Figure 9. Open Loop Frequency

Response

–4–

REV. B