ADS8661W

ACTIVE

12-bit, 1.25-MSPS, one-channel, wide bandwidth SAR ADC with programmable input ranges on +5V supply

Texas Instruments ADS8661W Product Info

1 April 2026 1

Parameters

Resolution (Bits)	12
Sample rate (max) (ksps)	1250
Number of input channels	1
Interface type	Enhanced SPI, SPI
Architecture	SAR
Input type	Differential, Single-ended
Rating	Catalog
Reference mode	External, Internal
Input voltage range (max) (V)	12.288
Input voltage range (min) (V)	-12.288
Features	Oscillator, Over-Voltage Protection, PGA
Operating temperature range (°C)	-40 to 125
Power consumption (typ) (mW)	36
Analog supply voltage (min) (V)	4.75
Analog supply voltage (max) (V)	5.25
SNR (dB)	73.5
Digital supply (min) (V)	1.65
Digital supply (max) (V)	5.25

Package

WQFN (RUM)-16-16 mm² 4 x 4

Features

12-bit ADC with integrated analog front-end
High speed: 1.25MSPS
Software programmable input ranges:
- Bipolar differential ranges: ±12.288V, ±10.24V, ±6.144V, ±5.12V, and ±2.56V
- Unipolar differential ranges: 0V–12.288V, 0V–10.24V, 0V–6.144V, and 0V–5.12V
Analog supply (5V): 1.65V to 5V I/O supply
Constant resistive input impedance ≥ 1MΩ
Input bandwidth: 450kHz
Input overvoltage protection: Up to ±20V
On-chip, 4.096V reference with low drift
Excellent performance:
- DNL: ±0.1LSB; INL: ±0.15LSB
- SNR: 74dBFS; THD: –102dB
ALARM feature with high, low threshold
multiSPI™ interface with daisy-chain
Extended industrial temperature range:
- –40°C to +125°C

12-bit ADC with integrated analog front-end
High speed: 1.25MSPS
Software programmable input ranges:
- Bipolar differential ranges: ±12.288V, ±10.24V, ±6.144V, ±5.12V, and ±2.56V
- Unipolar differential ranges: 0V–12.288V, 0V–10.24V, 0V–6.144V, and 0V–5.12V
Analog supply (5V): 1.65V to 5V I/O supply
Constant resistive input impedance ≥ 1MΩ
Input bandwidth: 450kHz
Input overvoltage protection: Up to ±20V
On-chip, 4.096V reference with low drift
Excellent performance:
- DNL: ±0.1LSB; INL: ±0.15LSB
- SNR: 74dBFS; THD: –102dB
ALARM feature with high, low threshold
multiSPI™ interface with daisy-chain
Extended industrial temperature range:
- –40°C to +125°C

Description

The ADS8661Wis an integrated data acquisition system based on a successive approximation (SAR) analog-to-digital converter (ADC) topology. The device features a high-speed, high-precision SAR ADC, integrated differential analog front-end (AFE) input driver circuit. The ADS8661W includes an overvoltage protection circuit up to ±20V and an on-chip 4.096V reference with extremely low temperature drift.

The device operates on a single 5V analog supply, but support true bipolar input ranges and unipolar input ranges. The bipolar input ranges are ±12.288V, ±6.144V, ±10.24V, ±5.12V, and ±2.56V, and the unipolar input ranges are from 0V to 12.288V, 10.24V, 6.144V, and 5.12V. The devices offer a high resistive input impedance (≥ 1MΩ) irrespective of the selected input range.

The multiSPI digital interface is backward-compatible to the traditional SPI protocol. Additionally, configurable features simplify interface to a wide range of host controllers.

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ADS8661W

12-bit, 1.25-MSPS, one-channel, wide bandwidth SAR ADC with programmable input ranges on +5V supply

Texas Instruments ADS8661W Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS All In One Distributor

ADS8661W

12-bit, 1.25-MSPS, one-channel, wide bandwidth SAR ADC with programmable input ranges on +5V supply

Texas Instruments ADS8661W Product Info

Parameters

Package

Features

Description

SUBMITTED SUCCESSFULLY！

ELECTRONIC COMPONENTS
All In One Distributor