PCM1794AQDBRQ1屬于集成電路（IC）的ADC/DAC-特殊用途。由美國德州儀器公司制造生產(chǎn)的PCM1794AQDBRQ1ADC/DAC - 特殊用途該產(chǎn)品族中的產(chǎn)品可用于模擬和數(shù)字表示的信息轉(zhuǎn)換，適用于特定用例，或集成了通用數(shù)據(jù)轉(zhuǎn)換器中不常見的其他功能。例如針對超聲或汽車?yán)走_(dá)應(yīng)用集成了低噪聲放大器和可變增益級的器件、注重音頻和視頻的產(chǎn)品、在段碼式顯示器上集成顯示測量值功能的器件、集成輸入輸出電氣隔離的器件等。

1 Features

1? Qualified for Automotive Applications

? AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

Range

– Device HBM Classification Level 2

– Device CDM Classification Level C6

? 24-Bit Resolution CMOS?

Analog Performance:

– Dynamic Range:

– 132 dB (9 V RMS, Mono)

– 129 dB (4.5 V RMS, Stereo)

– 127 dB (2 V RMS, Stereo)

– THD+N: 0.0004%

? Differential Current Output: 7.8 mA p-p

? 8× Oversampling Digital Filter:

– Stop-Band Attenuation: –130 dB

– Pass-Band Ripple: ±0.00001 dB

? Sampling Frequency: 10 kHz to 200 kHz

? System Clock: 128, 192, 256, 384, 512, or 768 fS

With Autodetect

? Accepts 16-Bit and 24-Bit Audio Data

? PCM Data Formats: Standard, I2S, and Left-

Justified

? Optional Interface Available to External Digital

Filter or DSP

? Digital De-Emphasis

? Digital Filter Rolloff: Sharp or Slow

? Soft Mute

? Zero Flag

? Dual-Supply Operation: 5-V Analog, 3.3-V Digital

? 5-V Tolerant Digital Inputs

? Small 28-Pin SSOP Package

2 Applications

? A/V Receivers

? Automotive Head Units

? Musical Instruments

? Car Audio Systems

? Other Applications Requiring 24-Bit Audio

3 Description

The PCM1794A-Q1 device is a monolithic, CMOS?

integrated circuit that includes stereo digital-to-analog converters (DACs) and support circuitry in a small 28-

pin SSOP package. The data converters use TI’s

advanced segment DAC architecture to achieve

excellent dynamic performance and improved

tolerance to clock jitter. The PCM1794A-Q1 device

provides balanced current outputs, allowing the user

to optimize analog performance externally. Sampling

rates up to 200 kHz are supported.