that1290 THAT Corporation, that1290 Datasheet - Page 6

• Manufacturer Part Number: that1290
• Description: Low Cost Dual Balanced Line Receiver Ics
• Manufacturer: THAT Corporation

Document 600121 Rev 01
provide enough headroom at its output to support a
+24 dBu input signal. The 1296 (configured for -6
dB gain) attenuates the input signal an additional
3 dB, compared to 1293. Although the noise floor of
1296 is 1.5 dB lower than 1293 noise floor, the
reduction in dynamic range is 3 dB - 1.5 dB =
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Page 6 of 10
1.5 dB. The 1296 attenuates the input signal more
than necessary to support a +24 dBu input.
THAT recommends the -3 dB input configuration
possible only with the 1293 in order to preserve
dynamic range within a reasonable range of power
supply voltages and external headroom limits.
In fact, for most professional audio applications,
Low Cost Dual Balanced Line Receivers
THAT 1290 Series