AD548KR Analog Devices, AD548KR Datasheet

AD548KR

Manufacturer Part Number

AD548KR

Description

18V; 500mW; precision, low power BiFET Op Amp

Manufacturer

Analog Devices

Datasheet

1.AD548KR.pdf (12 pages)

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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 µA 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 µV/°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 applica-

tion 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 com-

bination 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 tempera-

ture range of –40°C to +85°C.

The AD548 is available in an 8-lead plastic mini-DIP and

surface-mount (SOIC) packages.

PRODUCT HIGHLIGHTS

1. A combination of low supply current, excellent dc and ac

2. The AD548 is pin compatible with industry standard op

3. Guaranteed low input offset voltage (2 mV max) and drift

4. Analog Devices specifies each device in the warmed-up

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

6. Enhanced replacement for LF441 and TL061.

performance and low drift makes the AD548 the ideal op

amp for high performance, low power applications.

amps such as the LF441, TL061, and AD542, enabling

designers to improve performance while achieving a reduction

in power dissipation of up to 85%.

(20 µV/°C max) for the AD548J are achieved utilizing

Analog Devices’ laser drift trimming technology, eliminating

the need for external trimming.

condition, insuring that the device will meet its published

specifications in actual use.

NONINVERTING

OFFSET NULL

Plastic Mini-DIP (N) Package

CONNECTION DIAGRAMS

INVERTING

NOTE: PIN 4 CONNECTED TO CASE

NC = NO CONNECT

Precision, Low Power

INPUT

SOIC (R)Package

V–

TOP VIEW

and

TOP VIEW

10k

AD548

TRIM

BiFET Op Amp

–15V

V+

OUTPUT

OFFSET

NULL

AD548

Related parts for AD548KR

AD548KR Summary of contents

Page 1

... 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. ...

Page 2

AD548–SPECIFICATIONS Parameter 1 INPUT OFFSET VOLTAGE Initial Offset MIN MAX vs. Temperature vs. Supply vs. Supply MIN MAX Long-Term Offset Stability INPUT BIAS CURRENT 2 Either Input , Either ...

Page 3

... Max ± 15 ± 4.5 ± 18 170 200 AD548J AD548A AD548S AD548JR 4 AD548JN AD548JR-REEL = 25° 25°C. For higher temperature, the current doubles every 10°C. A AD548 AD548K/B Min Typ Max ± 15 ± 4.5 ± 18 170 200 AD548K AD548B 4 AD548KR AD548KN 4 AD548KR-REEL Unit V V µA ...

Page 4

AD548 l ABSOLUTE MAXIMUM RATINGS Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5

IN 10 – SUPPLY VOLTAGE – V 200 180 160 140 120 SUPPLY VOLTAGE – –10 –6 ...

Page 6

AD548 100 100 PHASE GAIN –20 –20 –40 –40 1k 10k 100k 1M 10M FREQUENCY – 10k 100k 1M FREQUENCY ...

Page 7

APPLICATION NOTES The AD548 is a JFET-input op amp with a guaranteed maxi- mum I of less than 10 pA, and offset and drift laser-trimmed to B 0.5 mV and 5 µV/°C, respectively (AD548B). AC specs include 1 MHz bandwidth, ...

Page 8

AD548 INPUT PROTECTION The AD548 is guaranteed to withstand input voltages equal to the power supply potential. Exceeding the negative supply volt- age on either input will forward bias the substrate junction of the chip. The induced current may destroy ...

Page 9

PHOTODIODE PREAMP The performance of the photodiode preamp shown in Figure 7 is enhanced by the AD548’s low input current, input voltage offset, and offset voltage drift. The photodiode sources a current proportional to the incident light power on its ...

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AD548KR Analog Devices, AD548KR Datasheet

AD548KR

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AD548KR Summary of contents

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