ADS8688A

AKTIV

SAR-ADC, 16 Bit, 500 KSPS, 8 Kanäle, mit Bipolar-Eingängen unter Verwendung einer 5-V-Stromversor

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Datenblatt

document-pdfAcrobat ADS868xA 16-Bit, 500-kSPS, 4- and 8-Channel, Single-Supply, SAR ADCs with Bipolar Input Ranges datasheet (Englisch) PDF | HTML

ADS8688A

AKTIV

Jetzt bestellen

Produktdetails

Resolution (Bits)

16

Sample rate (max) (ksps)

500

Number of input channels

8

Interface type

SPI

Architecture

SAR

Input type

Single-ended

Multichannel configuration

Multiplexed

Rating

Catalog

Reference mode

External, Internal

Input voltage range (max) (V)

10.24

Input voltage range (min) (V)

-10.24

Features

Daisy-Chainable, Oscillator, Over-Voltage Protection, PGA

Operating temperature range (°C)

-40 to 125

Power consumption (typ) (mW)

65

Analog supply voltage (min) (V)

4.75

Analog supply voltage (max) (V)

5.25

SNR (dB)

92

Digital supply (min) (V)

1.65

Digital supply (max) (V)

5.25

Resolution (Bits)

16

Sample rate (max) (ksps)

500

Number of input channels

8

Interface type

SPI

Architecture

SAR

Input type

Single-ended

Multichannel configuration

Multiplexed

Rating

Catalog

Reference mode

External, Internal

Input voltage range (max) (V)

10.24

Input voltage range (min) (V)

-10.24

Features

Daisy-Chainable, Oscillator, Over-Voltage Protection, PGA

Operating temperature range (°C)

-40 to 125

Power consumption (typ) (mW)

65

Analog supply voltage (min) (V)

4.75

Analog supply voltage (max) (V)

5.25

SNR (dB)

92

Digital supply (min) (V)

1.65

Digital supply (max) (V)

5.25

TSSOP (DBT)

38

62.08 mm² (9.7 mm × 6.4 mm)

16-Bit ADCs with Integrated Analog Front-End
4-, 8-Channel MUX with Auto and Manual Scan
Channel-Independent Programmable Inputs:
- ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V
- 10.24 V, 5.12 V, 2.56 V, 1.28 V
5-V Analog Supply: 1.65-V to 5-V I/O Supply
Constant Resistive Input Impedance: 1 MΩ
Input Overvoltage Protection: Up to ±20 V
On-Chip, 4.096-V Reference with Low Drift
Excellent Performance:
- 500-kSPS Aggregate Throughput
- DNL: ±0.5 LSB; INL: ±0.75 LSB
- Low Drift for Gain Error and Offset
- SNR: 92 dB; THD: –102 dB
- Low Power: 65 mW
AUX Input → Direct Connection to ADC Inputs
ALARM → High and Low Thresholds per Channel
SPI™-Compatible Interface with Daisy-Chain
Industrial Temperature Range: –40°C to 125°C
TSSOP-38 Package (9.7 mm × 4.4 mm)

16-Bit ADCs with Integrated Analog Front-End
4-, 8-Channel MUX with Auto and Manual Scan
Channel-Independent Programmable Inputs:
- ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V
- 10.24 V, 5.12 V, 2.56 V, 1.28 V
5-V Analog Supply: 1.65-V to 5-V I/O Supply
Constant Resistive Input Impedance: 1 MΩ
Input Overvoltage Protection: Up to ±20 V
On-Chip, 4.096-V Reference with Low Drift
Excellent Performance:
- 500-kSPS Aggregate Throughput
- DNL: ±0.5 LSB; INL: ±0.75 LSB
- Low Drift for Gain Error and Offset
- SNR: 92 dB; THD: –102 dB
- Low Power: 65 mW
AUX Input → Direct Connection to ADC Inputs
ALARM → High and Low Thresholds per Channel
SPI™-Compatible Interface with Daisy-Chain
Industrial Temperature Range: –40°C to 125°C
TSSOP-38 Package (9.7 mm × 4.4 mm)

The ADS8684A and ADS8688A are 4- and 8-channel, integrated data acquisition systems based on a 16-bit successive approximation (SAR) analog-to-digital converter (ADC), operating at a throughput of 500 kSPS. The devices feature integrated analog front-end circuitry for each input channel with overvoltage protection up to ±20 V, a 4- or 8-channel multiplexer with automatic and manual scanning modes, and an on-chip, 4.096-V reference with low temperature drift. Operating on a single 5-V analog supply, each input channel on the devices can support true bipolar input ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28V and ±0.64V, as well as unipolar input ranges of 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V and 0 V to 1.28 V. The gain of the analog front-end for all input ranges is accurately trimmed to ensure a high dc precision. The input range selection is software-programmable and independent for each channel. The devices offer a 1-MΩ constant resistive input impedance irrespective of the selected input range.

The ADS8684A and ADS8688A offer a simple SPI-compatible serial interface to the digital host and also support daisy-chaining of multiple devices. The digital supply operates from 1.65 V to 5.25 V, enabling direct interface to a wide range of host controllers.

The ADS8684A and ADS8688A are 4- and 8-channel, integrated data acquisition systems based on a 16-bit successive approximation (SAR) analog-to-digital converter (ADC), operating at a throughput of 500 kSPS. The devices feature integrated analog front-end circuitry for each input channel with overvoltage protection up to ±20 V, a 4- or 8-channel multiplexer with automatic and manual scanning modes, and an on-chip, 4.096-V reference with low temperature drift. Operating on a single 5-V analog supply, each input channel on the devices can support true bipolar input ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28V and ±0.64V, as well as unipolar input ranges of 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V and 0 V to 1.28 V. The gain of the analog front-end for all input ranges is accurately trimmed to ensure a high dc precision. The input range selection is software-programmable and independent for each channel. The devices offer a 1-MΩ constant resistive input impedance irrespective of the selected input range.

The ADS8684A and ADS8688A offer a simple SPI-compatible serial interface to the digital host and also support daisy-chaining of multiple devices. The digital supply operates from 1.65 V to 5.25 V, enabling direct interface to a wide range of host controllers.

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Technische Dokumentation

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Design und Entwicklung

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