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ADS8345

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16-Bit, 100-kSPS, 8-Ch SAR ADC with fully differential inputs

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Data sheet

ADS8345

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 100 Number of input channels 8 Interface type SPI Architecture SAR Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.6 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 3.2 Analog supply (min) (V) 2.7 Analog supply (max) (V) 5.25 SNR (dB) 85.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 16 Sample rate (max) (ksps) 100 Number of input channels 8 Interface type SPI Architecture SAR Input type Differential Multichannel configuration Multiplexed Rating Catalog Reference mode External Input voltage range (max) (V) 2.6 Input voltage range (min) (V) 0 Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 3.2 Analog supply (min) (V) 2.7 Analog supply (max) (V) 5.25 SNR (dB) 85.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
SSOP (DB) 20 56.16 mm² 7.2 x 7.8 SSOP (DBQ) 20 51.9 mm² 8.65 x 6
  • BIPOLAR INPUT RANGE
  • PIN-FOR-PIN COMPATIBLE WITH THE ADS7844 AND ADS8344
  • SINGLE SUPPLY: 2.7V to 5V
  • 8-CHANNEL SINGLE-ENDED OR 4-CHANNEL DIFFERENTIAL INPUT
  • UP TO 100kHz CONVERSION RATE
  • 85dB SINAD
  • SERIAL INTERFACE
  • QSOP-20 AND SSOP-20 PACKAGES
  • APPLICATIONS
    • DATA ACQUISITION
    • TEST AND MEASUREMENT EQUIPMENT
    • INDUSTRIAL PROCESS CONTROL
    • PERSONAL DIGITAL ASSISTANTS
    • BATTERY-POWERED SYSTEMS
  • BIPOLAR INPUT RANGE
  • PIN-FOR-PIN COMPATIBLE WITH THE ADS7844 AND ADS8344
  • SINGLE SUPPLY: 2.7V to 5V
  • 8-CHANNEL SINGLE-ENDED OR 4-CHANNEL DIFFERENTIAL INPUT
  • UP TO 100kHz CONVERSION RATE
  • 85dB SINAD
  • SERIAL INTERFACE
  • QSOP-20 AND SSOP-20 PACKAGES
  • APPLICATIONS
    • DATA ACQUISITION
    • TEST AND MEASUREMENT EQUIPMENT
    • INDUSTRIAL PROCESS CONTROL
    • PERSONAL DIGITAL ASSISTANTS
    • BATTERY-POWERED SYSTEMS

The ADS8345 is an 8-channel, 16-bit, sampling Analog-to-Digital (A/D) converter with a synchronous serial interface. Typical power dissipation is 8mW at a 100kHz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 500mV and VCC/2, providing a corresponding input voltage range of ±VREF. The device includes a shutdown mode which reduces power dissipation to under 15µW. The ADS8345 is ensured down to 2.7V operation.

Low-power, high-speed, and an onboard multiplexer make the ADS8345 ideal for battery-operated systems such as personal digital assistants, portable multi-channel data loggers, and measurement equipment. The serial interface also provides low-cost isolation for remote data acquisition. The ADS8345 is available in a QSOP-20 or SSOP-20 package and is ensured over the –40°C to +85°C temperature range.

The ADS8345 is an 8-channel, 16-bit, sampling Analog-to-Digital (A/D) converter with a synchronous serial interface. Typical power dissipation is 8mW at a 100kHz throughput rate and a +5V supply. The reference voltage (VREF) can be varied between 500mV and VCC/2, providing a corresponding input voltage range of ±VREF. The device includes a shutdown mode which reduces power dissipation to under 15µW. The ADS8345 is ensured down to 2.7V operation.

Low-power, high-speed, and an onboard multiplexer make the ADS8345 ideal for battery-operated systems such as personal digital assistants, portable multi-channel data loggers, and measurement equipment. The serial interface also provides low-cost isolation for remote data acquisition. The ADS8345 is available in a QSOP-20 or SSOP-20 package and is ensured over the –40°C to +85°C temperature range.
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Technical documentation

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Type Title Date
* Data sheet ADS8345: 16-Bit, 8-Channel Serial Output Sampling Analog-to-Digital Converter datasheet (Rev. C) 15 Apr 2003
More literature Voltage-reference impact on total harmonic distortion 01 Aug 2016
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
Technical article Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) 13 Mar 2015
More literature Determining Minimum Acquisition Times for SAR ADCs, part 2 17 Mar 2011
More literature Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) 10 Nov 2010
EVM User's guide ADS8344/45EVM 26 Jul 2007
More literature Interfacing the ADS8345 to TMS320C5416 DSP 05 Dec 2002
EVM User's guide ADS8345EVM User's Guide 05 Aug 2002

Design & development

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

Evaluation board

ADS8345EVM — ADS8345 Evaluation Module

The ADS8345EVM is an 8-channel, 16-bit analog-to-digital converter board based on the ADS8345 ADC. Typical power dissipation is 8mW at 100kHz throughput rate and a 5V supply. The device uses a synchronous serial interface which is buffered on the EVM.

Companion power devices:

  • TPS7A3001 Vin -3V to (...)
User guide: PDF
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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Calculation tool

JITTER-SNR-CALC — Jitter and SNR Calculator for ADCs

JITTER-SNR-CALC can be used for calculating theoretical Signal to Noise (SNR) performance of ADCs based on input frequency and clock jitter.
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
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