PCM1794AQDBRQ1.B中文资料德州仪器数据手册PDF规格书

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.