Precision, Low Power
BiFET Op Amp
a
AD548
CO NNECTIO N D IAGRAMS
P lastic Mini-D IP (N) P ackage,
Cer dip (Q ) P ackage and
SO IC (R)P ackage
FEATURES
Enhanced Replacem ent for LF441 and TL061
DC Perform ance:
200 A m ax Quiescent Current
10 pA m ax Bias Current, Warm ed Up (AD548C)
250 V m ax Offset Voltage (AD548C)
2 V/ ؇C m ax Drift (AD548C)
2 V p-p Noise, 0.1 Hz to 10 Hz
AC Perform ance:
1.8 V/ s Slew Rate
1 MHz Unity Gain Bandw idth
Available in Plastic, Herm etic Cerdip and Herm etic
Metal Can Packages and in Chip Form
Available in Tape and Reel in Accordance w ith
EIA-481A Standard
MIL-STD-883B Parts Available
Dual Version Available: AD648
Surface Mount (SOIC) Package Available
OFFSET NULL
1
2
3
4
8
7
6
NC
V+
INVERTING
INPUT
NONINVERTING
INPUT
OUTPUT
OFFSET
NULL
AD548
TOP VIEW
5
V–
10kΩ
5
4
1
TO -99 (H ) P ackage
–15V
NC
V
TRIM
OS
OFFSET NULL
8
V+
6
TOP VIEW
1
7
5
AD548
INVERTING
INPUT
2
OUTPUT
P RO D UCT D ESCRIP TIO N
3
OFFSET
NULL
4
T he 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.
NONINVERTING
INPUT
V–
NOTE : PIN 4 CONNECTED TO CASE
NC = NO CONNECT
over the industrial temperature range of –40°C to +85°C. T he
AD548S is rated over the military temperature range of –55°C
to +125°C and is available processed to MIL-STD-883B, Rev. C.
T he 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. T he C grade reduces input offset voltage to less
than 0.25 mV and offset voltage drift to less than 2 µV/°C. T his
level of dc precision is achieved utilizing Analog’s laser wafer
drift trimming process. T he 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.
T he AD548 is available in an 8-pin plastic mini-DIP, cerdip,
T O-99 metal can, surface mount (SOIC), or in chip form.
P RO D UCT H IGH LIGH TS
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. T he AD548 is pin compatible with industry standard op
amps such as the LF441, T L061, and AD542, enabling de-
signers to improve performance while achieving a reduction
in power dissipation of up to 85%.
T he 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.
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.
T he AD548 is pinned out in a standard op amp configuration
and is available in six performance grades. T he AD548J and
AD548K are rated over the commercial temperature range of
0°C to +70°C. T he AD548A, AD548B and AD548C are rated
5. A dual version, the AD648 is also available.
6. Enhanced replacement for LF441 and T L061.
REV. B
Inform ation furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assum ed by Analog Devices for its
use, nor for any infringem ents of patents or other rights of third parties
which m ay result from its use. No license is granted by im plication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.
Tel: 617/ 329-4700
Fax: 617/ 326-8703
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