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ADS8681W ACTIVE 16-bit, 1MSPS, one-channel, wide bandwidth SAR ADC with programmable input ranges on +5V supply Higher speed, increased bandwith

Product details

Resolution (Bits) 16 Sample rate (max) (ksps) 250 Number of input channels 1 Interface type Byte-Wide, Parallel Architecture SAR Input type Single-ended Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Oscillator Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 155 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 88 Digital supply (min) (V) 4.75 Digital supply (max) (V) 5.25
Resolution (Bits) 16 Sample rate (max) (ksps) 250 Number of input channels 1 Interface type Byte-Wide, Parallel Architecture SAR Input type Single-ended Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 10 Input voltage range (min) (V) -10 Features Oscillator Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 155 Analog supply voltage (min) (V) 4.75 Analog supply voltage (max) (V) 5.25 SNR (dB) 88 Digital supply (min) (V) 4.75 Digital supply (max) (V) 5.25
SSOP (DB) 28 79.56 mm² (10.2 mm × 7.8 mm) SOIC (DW) 28 184.37 mm² (17.9 mm × 10.3 mm)
  • 105dB SFDR at 250-kHz Sample Rate
  • Standard ±10-V Input Range
  • ±1.5 LSB Max INL
  • ±1 LSB Max DNL, 16-Bits No Missing Codes
  • ±2 mV Max Bipolar Zero Error With ±0.4 PPM/°C Drift
  • ±0.1% FSR Max Full-Scale Error With ±2 PPM/°C Drift
  • Single 5-V Supply Operation
  • Pin-Compatible With ADS7805 (Low Speed) and 12-Bit ADS8504/7804
  • Uses Internal or External Reference
  • Full Parallel Data Output
  • 70-mW Typ Power Dissipation at 250 KSPS
  • 28-Pin SSOP and SOIC Packages
  • APPLICATIONS
    • Industrial Process Control
    • Data Acquisition Systems
    • Digital Signal Processing
    • Medical Equipment
    • Instrumentation

  • 105dB SFDR at 250-kHz Sample Rate
  • Standard ±10-V Input Range
  • ±1.5 LSB Max INL
  • ±1 LSB Max DNL, 16-Bits No Missing Codes
  • ±2 mV Max Bipolar Zero Error With ±0.4 PPM/°C Drift
  • ±0.1% FSR Max Full-Scale Error With ±2 PPM/°C Drift
  • Single 5-V Supply Operation
  • Pin-Compatible With ADS7805 (Low Speed) and 12-Bit ADS8504/7804
  • Uses Internal or External Reference
  • Full Parallel Data Output
  • 70-mW Typ Power Dissipation at 250 KSPS
  • 28-Pin SSOP and SOIC Packages
  • APPLICATIONS
    • Industrial Process Control
    • Data Acquisition Systems
    • Digital Signal Processing
    • Medical Equipment
    • Instrumentation

The ADS8505 is a complete 16-bit sampling A/D converter using state-of-the-art CMOS structures. It contains a complete 16-bit, capacitor-based, SAR A/D with S/H, reference, clock, interface for microprocessor use, and 3-state output drivers.

The ADS8505 is specified at a 250-kHz sampling rate over the full temperature range. Precision resistors provide an industry standard ±10-V input range, while the innovative design allows operation from a single +5-V supply, with power dissipation under 100 mW.

The ADS8505 is available in 28-pin SOIC and 28-pin SSOP packages, both fully specified for operation over the industrial -40°C to 85°C temperature range.

The ADS8505 is a complete 16-bit sampling A/D converter using state-of-the-art CMOS structures. It contains a complete 16-bit, capacitor-based, SAR A/D with S/H, reference, clock, interface for microprocessor use, and 3-state output drivers.

The ADS8505 is specified at a 250-kHz sampling rate over the full temperature range. Precision resistors provide an industry standard ±10-V input range, while the innovative design allows operation from a single +5-V supply, with power dissipation under 100 mW.

The ADS8505 is available in 28-pin SOIC and 28-pin SSOP packages, both fully specified for operation over the industrial -40°C to 85°C temperature range.

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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet 16-Bit 250-KSPS Sampling CMOS Analog-to-Digital Converter datasheet (Rev. B) Feb 1, 2007
White paper Voltage-reference impact on total harmonic distortion Aug 1, 2016
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs May 21, 2015
Application note Determining Minimum Acquisition Times for SAR ADCs, part 2 Mar 17, 2011
Application note Determining Minimum Acquisition Times for SAR ADCs, part 1 (Rev. A) Nov 10, 2010
Application note Upgrading from the ADS7804/05 to the ADS8504/05 Apr 30, 2007
Application note Controlling the ADS7805 With TMS320 Series DSPs Nov 9, 2004

Design & development

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

Evaluation board

ADS8505EVM — ADS8505 evaluation module

The ADS8505EVM is designed for the prototyping and evaluation of the ADS8505 analog-to-digital converter (ADC). This 16-bit, capacitor-based, SAR/ADC operates at a maximum rate of 250 KSPS. The EVM allows the use of an optional buffer amplifier U8 to condition the input signals to the ADS8505 (...)

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Calculation tool

ANALOG-ENGINEER-CALC — PC software 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

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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Design tool

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
SSOP (DB) 28 Ultra Librarian
SOIC (DW) 28 Ultra Librarian

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