AK4702

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, I²S
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 12V+/-5%
Low Power Dissipation
Package
Small 48pin LQFP


Pinout




Specifications

(VSS=VVSS=0V;Note: 1)

Parameter	Symbol	min	max	Units
Power Supply:	VD VVD1 VVD2 VP |VSS-VVSS| (Note: 2)	-0.3 -0.3 -0.3 -0.3 -	6.0 6.0 6.0 14 0.3	V V V V V
Input Current (any pins except for supplies)	IIN	-	±10	mA
Input Voltage	VIND	-0.3	VD+0.3	V
Video Input Voltage	VINV	-0.3	VVD1+0.3	V
Audio Input Voltage	VINA	-0.3	VP+0.3	V
Ambient Temperature (Powered applied)	Ta	-20	85	°C
Storage Temperature	Tstg	-65	150	°C

Note: 1. All voltages with respect to ground.
Note: 2. VSS and VVSS must be connected to the same analog ground plane.


Description

The AK4702 offers the ideal features for digital set-top-box systems. Using AKM's multi-bit architecture for its modulator,it 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. It is offered in a space saving 48-pin LQFP package.