ESMT AD12250A
Elite Semiconductor Memory Technology Inc. Publication Date
：
Apr. 2007
Revision
：
1.1 1/13
24 bit, 96 kHz Stereo A/D Converter
Features
z 24-bit I2S audio data format output
z Single power supply 3.3 V for analog and digital
z Single-ended analog input with internal anti-alias
filter
z SNR: 98 dB (A-weighted)
z DR: 99 dB (A-weighted)
z THD: -91 dB
z Master/slave mode selection
z Multiple sampling frequencies (FS): 8~96 kHz
z System clock: 128 FS, 256 FS, 384 FS, 512 FS
z Power down function
z Internal PLL
z 16-pin TSSOP package
Applications
z DVD recorders
z CD recorders
z MD players
z HDD players
z A/V receivers
z Personal Video recorders
z Musical Instrument
z Automotive audio applications
Description
The AD12250A converts stereo single-ended analog
input signals into 24-bit I2S digital audio data
through on-chip anti-aliasing filter, multi-bit Σ-Δ
modulator, decimation filter and high-pass filter
which removes dc offsets. The AD12250A supports
sampling frequencies from 8 kHz to 96 kHz and
offers 128 FS, 256 FS, 384 FS or 512 FS system clock
operation modes depending on sampling frequency
and master/slave mode selection. The AD12250A is
suitable for digital audio media applications which
require high performance A/D conversion and low
system cost.
ORDERING INFORMATION
Product Number Package Comments
AD12250A-SG 16L TSSOP 4.4mm Pb-free
Functional Block Diagram
ESMT AD12250A
Elite Semiconductor Memory Technology Inc. Publication Date
：
Apr. 2007
Revision
：
1.1 2/13
Pin Assignment
M/S
MCLK
MSEL
SRSEL
SDATA
DGND
DVDD
BCLK
LRCLK
VREF
AGND
AVDD
AINR
VCM
AINL
PD
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
AD12250A
(Top View)
Pin Description
Pin Name Type Description Characteristics
1 SRSEL I 48kHz/96kHz sample rate selection Schmitt trigger input buffer
2 MCLK I Master clock input Schmitt trigger input buffer
3 MSEL I MCLK divided-by-2 selection
in master mode Schmitt trigger input buffer
4 SDATA O Serial audio data output
5 DGND P Digital ground
6 DVDD P Digital supply
7 BCLK I/O Bit clock input/output (64Fs) Schmitt trigger input buffer
8 LRCLK I/O Left/Right clock input/output (Fs) Schmitt trigger input buffer
9 PD I Power down, low active Schmitt trigger input buffer
10 AINL I Left channel analog input
11 VCM O Common-mode voltage
12 AINR I Right channel analog input
13 AVDD P Analog supply
14 AGND P Analog ground
15 VREF O Positive reference voltage
16 S/M I Master/Slave mode selection Schmitt trigger input buffer
Package Options
Package Type Part Number Thermal Information
16L TSSOP 4.4mm AD12250A-SG θJA ≅ 60 °C/W (Condition: still air)
ESMT AD12250A
Elite Semiconductor Memory Technology Inc. Publication Date
：
Apr. 2007
Revision
：
1.1 3/13
Absolute Maximum Ratings
Symbol Parameter Min Max Units
DVDD Supply for Digital Circuit 0 3.6 V
AVDD Supply for Analog Circuit 0 3.6 V
Analog Input Voltage AGND AVDD V
Digital Input Voltage DGND DVDD V
Tstg Storage Temperature -65 150 oC
Ta Ambient Operating Temperature -40 85 oC
Recommended Operating Conditions
Symbol Parameter Min Typ Max Units
DVDD Supply for Digital Circuit 3.0 3.3 3.6 V
AVDD Supply for Analog Circuit 3.0 3.3 3.6 V
Ta Ambient Operating Temperature 0 70 oC
Digital Characteristics
Symbol Parameter Min Typ Max Units
VIH High-Level Input Voltage 2.0 V
VIL Low-Level Input Voltage 0.8 V
VOH High-Level Output Voltage 2.4 V
VOL Low-Level Output Voltage 0.4 V
CI Input Capacitance 6.4 pF
Power Supply Characteristics
z Condition: TA = 25 °C, FS = 48 kHz, MCLK = 256 FS, slave mode, full-scale 1 kHz input signal
Symbol Parameter Condition Min Typ Max Units
AVDD Supply for Analog Circuit 3.0 3.3 3.6 V
DVDD Supply for Digital Circuit 3.0 3.3 3.6 V
IA Analog Power Supply Current AVDD = 3.3 V 18 mA
ID Digital Power Supply Current DVDD = 3.3 V 12 mA
Normal Operation,
AVDD, DVDD = 3.3 V 99 mW
PC Power Consumption
Power Down <0.5 μW
PSRR Power Supply Rejection Ratio (Note1) 1 kHz signal at AVDD 56 dB
Note1: PSRR = 56dB for 1μF capacitor on VCM pin and 36dB for 0.1μF capacitor on VCM pin.
