Analog Devices AD548KR-REEL, AD548KR, AD548KN, AD548JR-REEL, AD548JR Datasheet

a		Precision, Low Power
		BiFET Op Amp
		AD548

FEATURES

Enhanced Replacement for LF441 and TL061 DC Performance:

200 A max Quiescent Current

10 pA max Bias Current, Warmed Up (AD548C)

250 V max Offset Voltage (AD548C)

2V/ C max Drift (AD548C)

2V p-p Noise, 0.1 Hz to 10 Hz

AC Performance:

1.8 V/ s Slew Rate

1 MHz Unity Gain Bandwidth

Available in Plastic and Hermetic Metal Can Packages and in Chip Form

Available in Tape and Reel in Accordance with EIA-481A Standard

MIL-STD-883B Parts Available Dual Version Available: AD648

Surface-Mount (SOIC) Package Available

PRODUCT DESCRIPTION

The AD548 is a low power, precision monolithic operational amplifier. It offers both low bias current (10 pA max, warmed up) and low quiescent current (200 A max) and is fabricated with ion-implanted FET and laser wafer trimming technologies. Input bias current is guaranteed over the AD548’s entire common-mode voltage range.

The economical J grade has a maximum guaranteed input offset voltage of less than 2 mV and an input offset voltage drift of less than 20 V/°C. This level of dc precision is achieved utilizing Analog’s laser wafer drift trimming process. The combination of low quiescent current and low offset voltage drift minimizes changes in input offset voltage due to self-heating effects.

The AD548 is recommended for any dual supply op amp application requiring low power and excellent dc and ac performance. In applications such as battery-powered, precision instrument front ends and CMOS DAC buffers, the AD548’s excellent combination of low input offset voltage and drift, low bias current, and low 1/f noise reduces output errors. High common-mode rejection (82 dB, min on the “B” grade) and high open-loop gain ensures better than 12-bit linearity in high impedance, buffer applications.

The AD548 is pinned out in a standard op amp configuration and is available in three performance grades. The AD548J and AD548K are rated over the commercial temperature range of 0°C to 70°C. The AD548B is rated over the industrial temperature range of –40°C to +85°C.

The AD548 is available in an 8-lead plastic mini-DIP and surface-mount (SOIC) packages.

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 that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

CONNECTION DIAGRAMS

Plastic Mini-DIP (N) Package

and

SOIC (R)Package

OFFSET NULL
	1					8	NC
INVERTING							V+
	2					7
INPUT
NONINVERTING	3					6	OUTPUT
INPUT		AD548
V–	4					5	OFFSET
		TOP VIEW					NULL

NOTE: PIN 4 CONNECTED TO CASE

NC = NO CONNECT

10k

1 5

4 –15V

VOS TRIM

TOP VIEW

PRODUCT HIGHLIGHTS

1.A combination of low supply current, excellent dc and ac performance and low drift makes the AD548 the ideal op amp for high performance, low power applications.

2.The AD548 is pin compatible with industry standard op amps such as the LF441, TL061, and AD542, enabling designers to improve performance while achieving a reduction in power dissipation of up to 85%.

3.Guaranteed low input offset voltage (2 mV max) and drift (20 V/°C max) for the AD548J are achieved utilizing Analog Devices’ laser drift trimming technology, eliminating the need for external trimming.

4.Analog Devices specifies each device in the warmed-up condition, insuring that the device will meet its published specifications in actual use.

5.A dual version, the AD648, is also available.

6.Enhanced replacement for LF441 and TL061.

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

Tel: [phone]	www.analog.com
Fax: [phone]	© Analog Devices, Inc., 2002

AD548–SPECIFICATIONS		(@ 25 C and VS = 15 V dc unless otherwise noted.)
			AD548J			AD548K/B
Parameter	Min		Typ	Max	Min	Typ	Max	Unit
INPUT OFFSET VOLTAGE1
Initial Offset			0.75	2.0		0.3	0.5	mV
TMIN to TMAX				3.0/3.0/3.0			0.7/0.8	mV
vs. Temperature				20			5	µV/°C
vs. Supply	80				86			dB
vs. Supply, TMIN to TMAX	76/76/76				80			dB
Long-Term Offset Stability			15			15		µV/Month
INPUT BIAS CURRENT
Either Input2, VCM = 0			5	20		3	10	pA
Either Input2 at TMAX, VCM = 0				0.45/1.3/20			0.25/0.65	nA
Max Input Bias Current Over
Common-Mode Voltage Range				30			15	pA
Offset Current, VCM = 0			5	10		2	5	pA
Offset Current at TMAX				0.25/0.65/10			0.15/0.35	nA
INPUT IMPEDANCE			1 × 1012 3			1 × 1012 3		Ω pF
Differential
Common Mode			3 × 1012 3			3 × 1012 3		Ω pF
INPUT VOLTAGE RANGE			± 20			± 20
Differential3								V
Common Mode	± 11		± 12		± 11	± 12		V
Common-Mode Rejection
VCM = ± 10 V	76		90		82	92		dB
TMIN to TMAX	76/76/76		90		82	92		dB
VCM = ± 11 V	70		84		76	86		dB
TMIN to TMAX	70/70/70		84		76	86		dB
INPUT VOLTAGE NOISE								µV p-p
Voltage 0.1 Hz to 10 Hz			2			2
f = 10 Hz			80			80		nV/√Hz
f = 100 Hz			40			40		nV/√Hz
f = 1 kHz			30			30		nV/√Hz
f = 10 kHz			30			30		nV/√Hz
INPUT CURRENT NOISE								fA/√Hz
f = 1 kHz			1.8			1.8
FREQUENCY RESPONSE
Unity Gain, Small Signal	0.8		1.0		0.8	1.0		MHz
Full Power Response			30			30		kHz
Slew Rate, Unity Gain	1.0		1.8		1.0	1.8		V/µs
Settling Time to ± 0.01%			8			8		µs
OPEN LOOP GAIN
VO = ± 10 V, RL ≥ 10 kΩ	300		1000		300	1000		3V/mV
TMIN to TMAX, RL ≥ 10 kΩ	300/300/300		700		300	700		V/mV
VO = ± 10 V, RL ≥ 5 kΩ	150		500		150	500		V/mV
TMIN to TMAX, RL ≥ 5 kΩ	150/150/150		300		150	300		V/mV
OUTPUT CHARACTERISTICS
Voltage @ RL ≥ 10 kΩ,	± 12		± 13		± 12	± 13		V
TMIN to TMAX	± 12/± 12/± 12				± 12
Voltage @ RL ≥ 5 kΩ,	± 11		± 12.3		± 11	± 12.3		V
TMIN to TMAX	± 11/± 11/± 11				± 11
Short Circuit Current			15			15		mA

–2–

REV. C

							AD548
SPECIFICATIONS (continued)
		AD548J			AD548K/B
	Min	Typ	Max	Min	Typ	Max		Unit
POWER SUPPLY		± 15			± 15
Rated Performance	± 4.5		± 18	± 4.5		± 18		V
Operating Range								V
Quiescent Current		170	200		170	200		A
TEMPERATURE RANGE
Operating, Rated Performance
Commercial (0°C to 70°C)		AD548J			AD548K
Industrial (–40°C to +85°C)		AD548A			AD548B
Military (–55°C to +125°C)		AD548S
PACKAGE OPTIONS				AD548KR4
SOIC (R-8)	AD548JR
Plastic (N-8)	AD548JN4			AD548KN
Tape and Reel	AD548JR-REEL			AD548KR-REEL4

NOTES

1Input Offset Voltage specifications are guaranteed after five minutes of operation at TA = 25°C.

2Bias Current specifications are guaranteed maximum at either input after five minutes of operation at TA = 25°C. For higher temperature, the current doubles every 10°C. 3Defined as voltages between inputs, such that neither exceeds ± 10 V from ground.

4Not recommended for new designs; obsolete April 2002.

Specifications subject to change without notice.

REV. C

–3–

AD548

ABSOLUTE MAXIMUM RATINGSl	±18 V
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation2 . . . . . . . . . . . . .	. . . . . . . 500 mW
Input Voltage3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±18 V
Output Short Circuit Duration . . . . . . . . . . .	. . . . . . Indefinite
Differential Input Voltage . . . . . . . . . . . . . . .	. . . +VS and –VS
Storage Temperature Range (Q, H) . . . . . . .	–65°C to +150°C
(N, R) . . . . . . . .	–65°C to +125°C
Operating Temperature Range	0°C to 70°C
AD548J/K . . . . . . . . . . . . . . . . . . . . . . . . .
AD548B . . . . . . . . . . . . . . . . . . . . . . . . . . .	. –40°C to +85°C
Lead Temperature Range (Soldering 60 sec) .	. . . . . . . . 300°C

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 sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

2Thermal Characteristics: 8-Pin SOIC Package: θJA = 160°C/W, θJC = 42°C/W; 8-Lead Plastic Package: θJA = 90°C/W.

3For supply voltages less than ± 18 V, the absolute maximum input voltage is equal to the supply voltage.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD548 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

WARNING!

ESD SENSITIVE DEVICE

–4–

REV. C