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SSM2141,pdf datasheet (Portabl
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2009-08-24
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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 commonmode
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/ms 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 W low distortion
buffer amplifiers. For similar performance with G = 1/2, see
SSM2143.
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 commonmode
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/ms 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 W low distortion
buffer amplifiers. For similar performance with G = 1/2, see
SSM2143.
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