AD12250A ESMT | Alldatasheet
Document overview
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Technical content
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 Personal Video recorders z Musical Instrument z Automotive audio applications
Description
The AD12250A converts stereo single-ended analog input signals into 24-bit I 2S 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 F S, 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
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 8 9 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 Type Part Number Thermal Information 16L TSSOP 4.4mm AD12250A-SG θJA ≅ 60 °C/W (Condition: still air)
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 (N ote1) 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.