TC9293F, TC9293FN, TC9293N are a 2’nd order Σ-∆
modulation system 1 bit DA converter with a built-in 8 times over
sampling digital filter and analog filter developing for digital
audio equipment. As this IC is small package, SSOP24 (1.00 mm,
0.65 mm) and SDIP24, and the analog filter has been
incorporated, it is able to output a direct analog wave form and
construct small the digital filter~the analog output unit at a low
price.

Features
• Built in 8 times over sampling digital filter
• Low voltage operate (3.0~5.5 V)
• Built-in digital de-emphasis filter
• In serial control mode, output amplitude can be set in 128
steps of resolution using microcontroller command
• In parallel control mode, soft mute can be set for the output
signal in 64 steps in 20 ms
• Over sampling ratio (OSR) of Σ-∆ modulation circuit is 192 fs
• Support double speed operation
• Sampling frequency: 32 kHz, 44.1 kHz, 48 kHz
• Built-in 2’nd order analog filter
• Characteristics of the digital filter and DA converter are as
follows