FUNCTIONAL BLOCK DIAGRAM
12k
12k
6k
6k
–IN
+IN
SSM2143
V
OUT
REFERENCE
V+
V–
SENSE
Ω
Ω
Ω
Ω
PIN CONNECTIONS
Epoxy Mini-DIP (P Suffix)
and
SOIC (S Suffix)
1
2
3
45
6
7
8
REF
–IN
+IN
V–
OP-482
NC
V+
SENSE
SSM2143
TOP VIEW
(NOT TO SCALE)
NC = NO CONNECT
V
OUT
REV.
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.
a
–6 dB Differential
Line Receiver
SSM2143
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 Fax:
FEATURES
High Common-Mode Rejection
DC: 90 dB typ
60 Hz: 90 dB typ
20 kHz: 85 dB typ
Ultralow THD: 0.0006% typ @ 1 kHz
Fast Slew Rate: 10 V/ms typ
Wide Bandwidth: 7 MHz typ (G = 1/2)
Two Gain Levels Available: G = 1/2 or 2
Low Cost
GENERAL DESCRIPTION
The SSM2143 is an integrated differential amplifier intended to
receive balanced line inputs in audio applications requiring a
high level of immunity from common-mode noise. The device
provides a typical 90 dB of common-mode rejection (CMR),
which is achieved by laser trimming of resistances to better than
0.005%.
Additional features of the device include a slew rate of 10 V/µs
and wide bandwidth. Total harmonic distortion (THD) is less
than 0.004% over the full audio band, even while driving low
impedance loads. The SSM2143 input stage is designed to
handle input signals as large as +28 dBu at G = 1/2. Although
primarily intended for G = 1/2 applications, a gain of 2 can be
realized by reversing the +IN/–IN and SENSE/REFERENCE
connections.
When configured for a gain of 1/2, the SSM2143 and SSM2142
Balanced Line Driver provide a fully integrated, unity gain
solution to driving audio signals over long cable runs. For
similar performance with G = 1, see SSM2141.
