Document
ASAHI KASEI
[AK2306/LV]
AK2306/2306LV
Dual PCM CODEC for ISDN/VoIP TERMINAL ADAPTER
GENERAL DESCRIPTION
AK2306 is a dual PCM CODEC-Filter most suitable for ISDN Terminal Adapter. It includes Selectable A-law/u-law function, Internal Gain Adjustment from +6dB to –18dB by 1dB step control, Selectable 16Hz/20Hz Ring Tone Generator for SLIC. All of these functions are controlled by the internal register accessed through the serial interface. PCM interface of AK2306 accepts Long Frame, Short Frame clock formats and GCI format. 64 x N kHz(128k-4096kHz) clock input is available for PCM interface. AK2306 and AK2306LV are pin-compatible, but different products which power supply voltage are 5.0V and 3.3V,respectively.
- Dual
FEATURE
PCM CODEC and Filtering systems for ISDN Terminal Adapter - Selectable Ring Tone Generator for SLIC 16Hz or 20Hz tone is available. - Independent functions on each channel controlled by the internal register - Power Down Mode - Mute - Gain Adjustment: +6 to -18dB (1dB step) - Selectable PCM Data Interface Timing: Long Frame / Short Frame/GCI - Variable PCM Data Rate: 64k x N [Hz] (128k - 4.096MHz) - OP Amp for External Gain Adjustment - A-law/u-law Register Selectable - Serial Interface to access the internal register - Power on Reset - Single Power Supply Voltage - +5.0V ± 5% (AK2306) - +3.3V ± 0.3V (AK2306LV) - Low Power Consumption
PACKAGE
- 24pinVSOP 7.9 x 7.6 mm (0.5mm pin pitch)
MS0093-E-04
1
2001/11
ASAHI KASEI
[AK2306/LV]
CONTENTS
ITEMS - BLOCK DIAGRAM….…………..……………………… - PIN ASSIGNMENT….……………………………..…… - PIN CONDITION……...………………………………… - PIN FUNCTION…….…………………………………… - FUNCTIONAL DESCRIPTION…….…..……………… LONGFRAME/SHORTFRAME/GCI - MUTE…………………………………….……… 12 - GAIN ADJUSTMENT….…..…………………… 13 - RING TONE GENERATOR .......................... - RESET ....................................................... 14 15 PAGE 3 4 5 6 9
- CIRCUIT DESCRIPTION….….……………………...… 8 - PCM INTERFACE……….…………………….... 9
- POWER DOWN……..……………………..…… 16 - SERIAL INTERFACE………….………….…… 18 - REGISTER……….……………………………………… 22 - ABSOLUTE MAXIMUM RATINGS……..…………..… 25 - RECOMMENDED OPERATING CONDITIONS…….. 25 - ELECTRICAL CHARACTERISTICS……..………...… 25 - APPLICATION CIRCUIT EXAMPLE…..…………...… 34 - PACKAGE INFORMATION……..…………………..… 36
MS0093-E-04
2
2001/11
ASAHI KASEI
[AK2306/LV]
BLOCK DIAGRAM
GST0 VFTP0 VFTN0 VR0 VFR0 GSR0 GST1 VFTP1 VFTN1 VR1 VFR1 GSR1 TNOUT VREF LPC
GA0T AMPT0 GA0R
AAF0
CODEC CH0
PCM I/F FS0
SMF0
DX DR FS
AMPR0
BCLK
GA1T AMPT1 GA1R AMPR1
AAF1
CODEC CH1 FS1
SMF1
RING TONE GENERATOR BGREF
PLL
RXVlm0
TXVlm1 TXVlm0 RXVlm1
PWDN
A/u_SEL
Mut0
Mut1
VDD VSS Power on Reset
Internal Register
Serial I/F
R
i t
SCLK DATA CSN
MS0093-E-04
3
2001/11
ASAHI KASEI
[AK2306/LV]
PIN ASSIGNMENT
VFTP1 VFTN1 GST1 GSR1 VFR1 VR1 VDD FS BCLK DX DR TNOUT
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VREF VFTP0 VFTN0 GST0 GSR0 VFR0 VSS VR0 LPC CSN DATA SCLK
MS0093-E-04
4
2001/11
ASAHI KASEI
[AK.