a
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)
2 V/ C max Drift (AD548C)
2 V 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, Hermetic Cerdip 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
OFFSET NULL 1
INVERTING
2
INPUT
NONINVERTING 3
INPUT
V– 4
Precision, Low Power
BiFET Op Amp
AD548
CONNECTION DIAGRAMS
Plastic Mini-DIP (N) Package,
Cerdip (Q) Package and
SOIC (R)Package
8 NC
7 V+
6 OUTPUT
AD548
TOP VIEW
5 OFFSET
NULL
10kΩ
5
4
TO-99 (H) Package
NC
OFFSET NULL
1
8
1
–15V
V
OS
TRIM
V+
7
6
TOP VIEW
AD548
INVERTING
2
INPUT
3
5
4
OUTPUT
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.
The C grade reduces input offset voltage to less
than 0.25 mV and offset voltage drift to less than 2
µV/°C.
This
level of dc precision is achieved utilizing Analog’s laser wafer
drift trimming process. The combination of low quiescent cur-
rent and low offset voltage drift minimizes changes in input off-
set voltage due to self-heating effects. Four additional grades are
offered over the commercial, industrial and military temperature
ranges.
The AD548 is recommended for any dual supply op amp appli-
cation requiring low power and excellent dc and ac perfor-
mance. 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 com-
mon-mode rejection (86 dB, min on the “C” grade) and high
open-loop gain ensures better than 12-bit linearity in high im-
pedance, buffer applications.
The AD548 is pinned out in a standard op amp configuration
and is available in six performance grades. The AD548J and
AD548K are rated over the commercial temperature range of
0°C to +70°C. The AD548A, AD548B and AD548C are rated
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.
NONINVERTING
INPUT
OFFSET
NULL
V–
NOTE : PIN 4 CONNECTED TO CASE
NC = NO CONNECT
over the industrial temperature range of –40°C to +85°C. The
AD548S is rated over the military temperature range of –55°C
to +125°C and is available processed to MIL-STD-883B, Rev. C.
The AD548 is available in an 8-pin plastic mini-DIP, cerdip,
TO-99 metal can, surface mount (SOIC), or in chip form.
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 de-
signers 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
µV/°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 con-
dition, insuring that the device will meet its published specifi-
cations 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: 617/329-4700
Fax: 617/326-8703
AD [ ANALOG DEVICES ]
