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Product details

Parameters

Number of DAC channels (#) 8 Analog inputs 0 Analog outputs 8 DAC SNR (Typ) (dB) 105 Sampling rate (Max) (kHz) 200 Control interface SPI, I2C, H/W Resolution (Bits) 24 Architecture Current Segment DAC open-in-new Find other Audio DACs

Package | Pins | Size

HTSSOP (PWP) 28 43 mm² 4.4 x 9.7 open-in-new Find other Audio DACs

Features

  • Qualified for Automotive Applications: PCM1681-
    Q1
  • 24-Bit Resolution
  • Analog Performance:
    • Dynamic Range: 105 dB Typical
    • SNR: 105 dB Typical
    • THD+N: 0.002% Typical
    • Full-Scale Output: 3.75 VPP Typical
  • 4×/8× Oversampling Interpolation Filter:
    • Stop-Band Attenuation: –57 dB
    • Pass-Band Ripple: ±0.015 dB
  • Sampling Frequency: 5 kHz to 200 kHz
  • System Clock: 128 fS, 192 fS, 256 fS, 384 fS,
    512 fS, 768 fS, or 1152 fS with Autodetect
  • Zero Flags for Selectable Channel Combinations
  • Flexible Mode Control:
    • SPI™/I2C™ Dual Mode for Serial Port
    • Parallel Hardware Control with 4 Functions
  • User-Programmable Functions (in SPI/I2C):
    • Flexible Audio Data Formats:
      • Right-Justified, I2S™, Left-Justified, TDM,
        DSP
      • 16- and 24-Bit Audio Data
    • Digital Attenuation: Mode Selectable
      • 0 dB to –63 dB, 0.5 dB/step
      • 0 dB to –100 dB, 1 dB/step
    • Soft Mute
    • Digital De-Emphasis
    • Digital Filter Roll-Off: Sharp or Slow
    • Oversampling Mode
  • User-Programmable Functions (in H/W):
    • Flexible Audio Data Formats:
      • Right-Justified, I2S, Left-Justified, TDM
      • Soft Mute
      • Digital De-Emphasis
      • Oversampling Mode
  • Power Supply Voltage: 5-V Analog, 3.3-V Digital
  • Package: 28-Lead HTSSOP PowerPAD
  • Operation Temperature Range:
    • –40°C to 85°C for Consumer Grade
    • –40°C to 105°C for Automotive Audio Grade
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Description

The PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages. The DACs utilize Burr-Brown's enhanced multilevel delta-sigma (ΔΣ) architecture to achieve excellent signal-to-noise performance and a high tolerance to clock jitter.

The PCM1681 and PCM1681-Q1 accept TDM (time-division multiplexed) format in addition to industry-standard audio data formats with 16- to 24-bit audio data width. Sampling rates up to 200 kHz are supported. The PCM1681 and PCM1681-Q1 provide a sub-set of user-programmable functions through a parallel control port, in addition to a full set of user-programmable functions through a serial control port, SPI, or I2C. The PCM1681 supports –40°C to +85°C for consumer grade applications and the PCM1681-Q1 supports –40°C to +105°C for automotive audio grade systems.

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Technical documentation

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Type Title Date
* Datasheet PCM1681 24-Bit, 192-kHz Sampling, Enhanced Multilevel Delta-Sigma, Eight-Channel Audio Digital-to-Analog Converter datasheet (Rev. C) Jul. 31, 2015
User guide DEM-PCM1681 Evaluation Module Apr. 05, 2008
Application note Dynamic Performance Testing of Digital Audio D/A Converters Oct. 02, 2000
Application note A Low Noise, Low Distortion Design for Antialiasing and Anti-Imaging Filters Sep. 27, 2000
Application note THD+N Versus Frequency Characteristics and Spectra of the PCM1717/18/19/20/23/27 Sep. 27, 2000

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

DRIVER OR LIBRARY Download
Linux Driver for PCM1681
PCM1681SW-LINUX The Linux driver supports the PCM1681 8-Channel Audio DAC. The Linux driver supports communication through I2C and registers with the ASOC framework of the Linux kernel.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • pcm1681
Linux Source Files

(...)

SUPPORT SOFTWARE Download
SLAC222.ZIP (513 KB)

Design tools & simulation

SIMULATION MODEL Download
SLAC192.ZIP (20 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

CAD/CAE symbols

Package Pins Download
HTSSOP (PWP) 28 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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