a
FEATURES
High Common-Mode Rejection
DC: 100 dB typ
60 Hz: 100 dB typ
20 kHz: 70 dB typ
40 kHz: 62 dB typ
Low Distortion: 0.001% typ
Fast Slew Rate: 9.5 V/ s typ
Wide Bandwidth: 3 MHz typ
Low Cost
Complements SSM2142 Differential Line Driver
APPLICATIONS
Line Receivers
Summing Amplifiers
Buffer Amplifiers–Drives 600
High Common-Mode Rejection
Differential Line Receiver
SSM2141
FUNCTIONAL BLOCK DIAGRAM
25kΩ
–IN
2
25kΩ
5
SENSE
7
+V
CC
SSM2141
6
OUTPUT
4
–V
EE
25kΩ
+IN
3
25kΩ
1
REFERENCE
Load
PIN CONNECTIONS
8-Pin Plastic Mini-DIP
(P Suffix)
Narrow Body SO
(S Suffix)
REFERENCE 1
–IN 2
+IN 3
8 NC
GENERAL DESCRIPTION
The SSM2141 is an integrated differential amplifier intended to
receive balanced line inputs in audio applications requiring a
high level of noise immunity and optimum common-mode
rejection. The SSM2141 typically achieves 100 dB of common-
mode rejection (CMR), whereas implementing an op amp with
four off-the-shelf precision resistors will typically achieve only
40 dB of CMR—inadequate for high-performance audio.
The SSM2141 achieves low distortion performance by
maintaining a large slew rate of 9.5 V/µs and high open-loop
gain. Distortion is less than 0.002% over the full audio
bandwidth. The SSM2141 complements the SSM2142
balanced line driver. Together, these devices comprise a fully
integrated solution for equivalent transformer balancing of
audio signals without the problems of distortion, EMI fields,
and high cost.
Additional applications for the SSM2141 include summing
signals, differential preamplifiers, and 600
Ω
low distortion
buffer amplifiers. For similar performance with G = 1/2, see
SSM2143.
SSM2141
7 V+
6 OUTPUT
TOP VIEW
(Not to Scale)
5 SENSE
V– 4
NC = NO CONNECT
REV.
C
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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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax:
781/461-3113
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