Rustem Nazmiev

SA616 AUDIO_OUT DC temperature drift

Discussion created by Rustem Nazmiev on May 25, 2016
Latest reply on May 25, 2016 by Rustem Nazmiev

  Hello. We are designing narrow-band radiomodem in 160 MHz band, receiver based on SA616 IC. There's no information about temperature drift (range from -40 0C to +85 0C) on pin8 AUDIO_OUT(combined with pin7 as a repeater) in SA616 (SSOP20 package).  Supply voltage is 5V. DC component rejection (with internal op amp ) isn't good for us, because we use 4-cpfsk modulation, message can contain constant symbols resulting in constant frequency shift. After internal repeating we use amplification and filtering, temperature drift significantly reduce our dynamic range.

  Summarised questions are:

1) Could you give Pin8 AUDIO_OUT(combined with pin7 as a repeater) temperature drift (range from -40 0C to +85 0C) with 5V supply?

2) Is there any replacement for SA616 IC?

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