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ADS8568

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16-bit, 8-channel, simultaneous-sampling, bipolar-input, SAR analog-to-digital converter (ADC)

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Data sheet

ADS8568

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 500 Number of input channels 8 Interface type Byte-Wide, Parallel, SPI Architecture SAR Input type Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 12 Input voltage range (min) (V) -12 Features Daisy-Chainable, Oscillator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 335 Analog supply (min) (V) 4.5 Analog supply voltage (max) (V) 5.5 SNR (dB) 91.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
Resolution (Bits) 16 Sample rate (max) (ksps) 500 Number of input channels 8 Interface type Byte-Wide, Parallel, SPI Architecture SAR Input type Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 12 Input voltage range (min) (V) -12 Features Daisy-Chainable, Oscillator Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 335 Analog supply (min) (V) 4.5 Analog supply voltage (max) (V) 5.5 SNR (dB) 91.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
LQFP (PM) 64 144 mm² 12 x 12 VQFN (RGC) 64 81 mm² 9 x 9
  • Family of 12-, 14-, and 16-Bit, Pin- and Software-Compatible ADCs
  • Maximum Data Rate per Channel:
    • ADS8528: 650 kSPS (PAR) or
      480 kSPS (SER)
    • ADS8548: 600 kSPS (PAR) or
      450 kSPS (SER)
    • ADS8568: 510 kSPS (PAR) or
      400 kSPS (SER)
  • Excellent AC Performance:
    • Signal-to-Noise Ratio:
      ADS8528: 73.9 dB, ADS8548: 85 dB, ADS8568: 91.5 dB
    • Total Harmonic Distortion:
      ADS8528: –89 dB, ADS8548: –91 dB, ADS8568: –94 dB
  • Programmable, Buffered Internal Reference:
    0.5 V–2.5 V or 0.5 V–3.0 V Supports Input Voltage Ranges up to ±12 V
  • Selectable Parallel or Serial Interface
  • Scalable Low-Power Operation Using Auto-Sleep Mode: Only 32 mW at 10 kSPS
  • Fully Specified Over Extended Industrial Temperature Range
  • Family of 12-, 14-, and 16-Bit, Pin- and Software-Compatible ADCs
  • Maximum Data Rate per Channel:
    • ADS8528: 650 kSPS (PAR) or
      480 kSPS (SER)
    • ADS8548: 600 kSPS (PAR) or
      450 kSPS (SER)
    • ADS8568: 510 kSPS (PAR) or
      400 kSPS (SER)
  • Excellent AC Performance:
    • Signal-to-Noise Ratio:
      ADS8528: 73.9 dB, ADS8548: 85 dB, ADS8568: 91.5 dB
    • Total Harmonic Distortion:
      ADS8528: –89 dB, ADS8548: –91 dB, ADS8568: –94 dB
  • Programmable, Buffered Internal Reference:
    0.5 V–2.5 V or 0.5 V–3.0 V Supports Input Voltage Ranges up to ±12 V
  • Selectable Parallel or Serial Interface
  • Scalable Low-Power Operation Using Auto-Sleep Mode: Only 32 mW at 10 kSPS
  • Fully Specified Over Extended Industrial Temperature Range

The ADS85x8 contain eight low-power, 12-, 14-, or 16-bit, successive approximation register (SAR)-based analog-to-digital converters (ADCs) with true bipolar inputs. These channels are grouped in four pairs, thus allowing simultaneous high-speed signal acquisition of up to 650 kSPS.

The devices support selectable parallel or serial interface with daisy-chain capability. The programmable reference allows handling of analog input signals with amplitudes up to ±12 V.

The ADS85x8 family supports an auto-sleep mode for minimum power dissipation and is available in both 64-pin VQFN and LQFP packages. The entire family is specified over a temperature range of –40°C to +125°C.

The ADS85x8 contain eight low-power, 12-, 14-, or 16-bit, successive approximation register (SAR)-based analog-to-digital converters (ADCs) with true bipolar inputs. These channels are grouped in four pairs, thus allowing simultaneous high-speed signal acquisition of up to 650 kSPS.

The devices support selectable parallel or serial interface with daisy-chain capability. The programmable reference allows handling of analog input signals with amplitudes up to ±12 V.

The ADS85x8 family supports an auto-sleep mode for minimum power dissipation and is available in both 64-pin VQFN and LQFP packages. The entire family is specified over a temperature range of –40°C to +125°C.
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Technical documentation

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Type Title Date
* Data sheet ADS85x8 12-, 14-, and 16-Bit, 8-Channel, Simultaneous Sampling ADCs datasheet (Rev. C) PDF | HTML 03 Feb 2016
EVM User's guide ADS8568EVM-PDK Evaluation Module (Rev. E) PDF | HTML 04 May 2021
Certificate ADS8568EVM-PDK EU RoHS Declaration of Conformity (DoC) (Rev. A) 23 Feb 2021
Circuit design Circuit for driving high-voltage SAR ADCs for high-voltage, true diff signal acq (Rev. A) 08 Mar 2019
Circuit design Circuit for driving a high-voltage SAR with an instrumentation amplifier 04 Oct 2018
Circuit design Circuit for driving an ADC with an instrumentation amplifier in high gain 04 Oct 2018
Circuit design Circuit for driving high-voltage SAR ADC with a buffered instrumentation 04 Oct 2018
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
Technical article Settling time challenge and improvement tips 13 Nov 2015
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015
Application note ADS856x Design Challenges and Improvement Techniques for SAR Driver Circuit (Rev. A) 18 May 2015
Application note ADS8528, ADS8548, and ADS8568 Timing Considerations 21 Jun 2014
Technical article Input considerations for SAR ADCs 20 Jun 2014
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 17 Mar 2011

Design & development

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

Evaluation board

ADCPRO — Analog-to-digital converter pro (ADCPro™) evaluation software

ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)

User guide: PDF
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Evaluation board

ADS8568EVM-PDK — ADS8568 16-bit 8-channel simultaneous-sampling SAR ADC EVM performance demonstration kit (PDK)

The ADS8568EVM is an evaluation platform for the ADS8568, a 16-bit, eight channel, simultaneous sampling, bipolar input analog-to-digital converter (ADC). The ADS8568EVM allows evaluation of all aspects of the ADS8568 device.

 

User guide: PDF | HTML
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Support software

SBAC180 — Source Files for SBAA247

Supported products & hardware

Supported products & hardware

Products
Precision ADCs
ADS8568 — 16-bit, 8-channel, simultaneous-sampling, bipolar-input, SAR analog-to-digital converter (ADC)
Download
Support software

SBAC215 — Source Files for SBAA314

Supported products & hardware

Supported products & hardware

Products
Instrumentation amplifiers
INA828 — 50-μV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier
Precision ADCs
ADS8568 — 16-bit, 8-channel, simultaneous-sampling, bipolar-input, SAR analog-to-digital converter (ADC)
Download
Support software

SBAC216 — Source Files for SBAA286

Supported products & hardware

Supported products & hardware

Products
Instrumentation amplifiers
INA828 — 50-μV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier
Precision ADCs
ADS8568 — 16-bit, 8-channel, simultaneous-sampling, bipolar-input, SAR analog-to-digital converter (ADC)
Precision op amps (Vos<1mV)
OPA827 — Low-noise, high-precision, JFET-input operational amplifier
Download
Support software

SBAC217 — Source Files for SBAA999

Supported products & hardware

Supported products & hardware

Products
Instrumentation amplifiers
INA828 — 50-μV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier
Precision ADCs
ADS8568 — 16-bit, 8-channel, simultaneous-sampling, bipolar-input, SAR analog-to-digital converter (ADC)
Precision op amps (Vos<1mV)
OPA827 — Low-noise, high-precision, JFET-input operational amplifier
Download
Simulation model

ADS8568, ADS8548, ADS8528 IBIS Model (Rev. B)

SBAM096B.ZIP (81 KB) - IBIS Model
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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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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 (...)
User guide: PDF
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Package Pins Download
LQFP (PM) 64 View options
VQFN (RGC) 64 View options
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