| The AK4705A offers the ideal features for digital set-top-box systems. Using AKM multi-bit architecture for its audio DAC, the AK4705A delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4705A 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 AK4705A also including the audio switches, volumes, video switches, video filters, designed primarily for digital set-top-box systems. The AK4705A is offered in a space saving 48-pin LQFP package. |
|
- Application s : Digital TV, Set-Top Box
- 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, I 2 S, 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
- Power Supply:
5V+/–5% and 12V+/–5%
Low Power Dissipation / Low Power Standby Mode
- Package: Small 48pin LQFP
- Evaluation Board: AKD4705A
|
