FEATURES
General
• Low power consumption
• 2.4 V to 3.6 V power supply range with 3.0 V typical
• 5 V tolerant TTL compatible digital inputs
• 256, 384 and 512fs system clock
• Supports sampling frequencies from 8 to 100 kHz
• Non-inverting ADC plus integrated high-pass filter to
cancel DC offset
• The ADC supports 2 V (RMS) input signals
• Overload detector for easy record level control
• Separate power control for ADC and DAC
• Integrated digital interpolation filter plus non-inverting
DAC
• Functions controllable either by L3 microcontroller
interface or via static pins
• The UDA1345TS is pin and function compatible with the
UDA1344TS
• Small package size (SSOP28).
Multiple format input interface
• I
2S-bus, MSB-justified up to 24 bits and LSB-justified
16, 18 and 20 bits format compatible
• Three combined data formats with MSB data output and
LSB 16, 18 and 20 bits data input
• 1fs input and output format data rate.
DAC digital sound processing
The sound processing features of the UDA1345TS can
only be used in L3 microcontroller mode:
• Digital dB-linear volume control (low microcontroller
load) via L3 microcontroller with 1 dB steps
• Digital de-emphasis for 32, 44.1 and 48 kHz
• Soft mute via cosine roll-off (in 1024 samples).
Note: in contrast to the UDA1344TS, the UDA1345TS
does not have bass-boost and treble.
Advanced audio configuration
• Stereo single-ended input configuration
• Stereo line output (under microcontroller volume
control), no post filter required
• High linearity, dynamic range and low distortion.
GENERAL DESCRIPTION
The UDA1345TS is a single-chip stereo Analog-to-Digital
Converter (ADC) and Digital-to-Analog Converter (DAC)
with signal processing features employing bitstream
conversion techniques. The low power consumption and
low voltage requirements make the device eminently
suitable for use in low-voltage low-power portable digital
audio equipment which incorporates recording and
playback functions.
The UDA1345TS supports the I2S-bus data format with
word lengths of up to 24 bits, the MSB justified data format
with word lengths of up to 20 bits and the LSB justified
serial data format with word lengths of 16, 18 and 20 bits.
The UDA1345TS also supports three combined data
formats with MSB justified data output and LSB 16, 18
and 20 bits data input.
The UDA1345TS can be used either with static pin control
or under L3 microcontroller interface. In L3 mode the
UDA1345TS has basic sound features in playback mode
such as de-emphasis, volume control and soft mute.

特征
一般
低功耗
•2.4 V至3.6 V电源范围与3 V典型
•5 V容忍TTL兼容数字输入
•256、384和512fs系统时钟
•支持采样频率从8到100千赫
•非反相ADC加集成高通滤波器
取消直流偏移
•ADC支持2 V（RMS）输入信号
•过载检测器，便于记录电平控制
•ADC和DAC单独的功率控制
•集成数字插值滤波器加非反相
数模转换器
•通过L3单片机控制功能
接口或通过静态引脚
•的uda1345ts引脚和功能兼容
uda1344ts
•小尺寸封装（ssop28）。
多格式输入接口
我•
2s总线，MSB和LSB位达24
16、18位和20位格式兼容
•三组合数据格式与MSB数据输出
LSB 16，18和20位数据输入
•1fs输入和输出格式的数据率。
数字声音处理
该uda1345ts声音处理功能
只适用于L3单片机模式：
数字DB线性音量控制（低微控制器）
负载通过L3微控制器与1分贝步骤
•数字去加重为32，44.1和48千赫
•软静音通过余弦滚断（在1024个样本）。
注：在对比的uda1344ts，的uda1345ts
没有低音提升和高音。
先进的音频配置
•立体声单端输入配置
立体声输出线（微控制器音量）
控制，无需后置过滤器
•高线性度，动态范围和低失真。
一般描述
是的uda1345ts单片立体声数字模拟
转换器（ADC）和数模转换器（DAC）
采用比特流的信号处理功能
转换技术。低功耗和
低电压要求显然使设备
适用于低压低功耗便携式数字
音频设备，采用录音和
播放功能。
的uda1345ts支持I2C总线数据格式
多达24位字长的MSB数据格式，
字长度可达20位和LSB的理由
串行数据格式，字长为16，18和20位。
的uda1345ts还支持三组合数据
与MSB数据输出和LSB 16格式，18
和20位数据输入。
的uda1345ts可以采用静态密码控制
或根据L3单片机接口。在L3模式下
uda1345ts在回放模式基本语音特点
如去加重，音量控制和软静音。

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