AK4705 Datasheet, PDF (1/50 Pages) Asahi Kasei Microsystems – 2ch 24bit DAC with AV SCART Switch

[AK4705]
AK4705
2ch 24bit DAC with AV SCART Switch
GENERAL DESCRIPTION
The AK4705 offers the ideal features for digital set-top-box systems. Using AKM's multi-bit architecture
for its modulator, the AK4705 delivers a wide dynamic range while preserving linearity for improved
THD+N performance. The AK4705 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
AK4705 also including the audio switches, volumes, video switches, video filters, etc. designed primarily
for digital set-top-box systems. The AK4705 is offered in a space saving 48-pin LQFP package.
FEATURES
DAC
† Sampling Rates Ranging from 32kHz to 50kHz
† 64dB High Attenuation 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: 24bit MSB Justified, I²S, 18/16bit LSB Justified
† 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 Pop-noise Free Circuit
(+6dB to –60dB & Mute)
† Analog Inputs
Two Stereo Inputs (TV&VCR SCART)
One Stereo Input (Changeover to Internal DAC)
† Analog Outputs
Two Stereo Outputs (TV, VCR SCART)
One Mono Output (Modulator)
† Pop Noise Free Circuit for Power On/Off
Video Section
† Integrated LPF: –40dB@27MHz
† 75ohm Driver
† 6dB Gain for Outputs
† Adjustable Gain
† Four CVBS/Y Inputs (ENCx2, TV, VCR),
Three CVBS/Y Outputs (RF, TV, VCR)
† Three R/C Inputs (ENCx2, VCR),
Two R/C outputs (TV, VCR)
† Bi-Directional Control for VCR-Red/Chroma
† Two G and B Inputs (ENC, VCR),
One G and B Outputs (TV)
† Y/Pb/Pr Option (to 6MHz)
† VCR Input Monitor
Loop–Through Mode for Standby
Auto–Startup Mode for Power Saving
SCART Pin#16(Fast Blanking), Pin#8(Slow Blanking) Control
AK4702/04 Software Compatible
MS0451-E-01
-1-
2007/06