ASAHI KASEI
[AK4702EQ]
AK4702EQ
2ch DAC with AV SCART switch
GENERAL DESCRIPTION
The AK4702 offers the ideal features for digital set-top-box systems. Using AKM's multi-bit architecture
for its modulator, the AK4702 delivers a wide dynamic range while preserving linearity for improved
THD+N performance. The AK4702 integrates a combination of SCF and CTF filters, removing the need
for high cost external filters and increasing performance for systems with excessive clock jitter. The
AK4702 also including the audio switches and volumes designed primarily for digital set-top-box systems.
The AK4702 is offered in a space saving 48-pin LQFP package.
FEATURES
DAC
Sampling Rates Ranging from 8kHz to 50kHz
18bit 8x FIR Digital Filter
2nd order Analog LPF
On chip Buffer with Single-ended Output
Digital de-emphasis for 32k, 44.1k and 48kHz sampling
I/F format: 18bit MSB justified, 18/16bit LSB justified, I
2
S
Master clock: 256fs, 384fs
High Tolerance to Clock Jitter
Analog switches for SCART
Audio section
THD+N: -86dB (@2Vrms)
Dynamic Range: 96dB (@2Vrms)
Stereo Analog Volume with Zero-cross Detection Circuit
(+6dB to –60dB & Mute)
Five Analog Inputs
Two Stereo Input (TV, VCR SCART)
One Mono Input for Tone
Five Analog Outputs
Two Stereo Outputs (TV, VCR SCART)
One Mono Output
Loop-through mode for standby
Pop Noise Free Circuit for Power on/off
Video section
75ohm driver
6dB Gain for Outputs
Adjustable gain
Four CVBS/Y inputs (ENCx2, TV, VCR),
Three CVBS/Y output (RF, TV, VCR)
Three R/C inputs (ENCx2, VCR), Two R/C output (TV, VCR)
Bi-directional control for VCR-Chroma/Red
Two G and B inputs (ENC, VCR), One G and B outputs (TV)
Power supply
5V+/-5% and 12.6V~10V
Low Power Dissipation
Package
Small 48pin LQFP
MS0424-E-00
-1-
2005/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
