Specifications
| Type | Description |
|---|---|
| Part Number | ADS8688 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Resolution | 16 bit |
| Number of Input Channels | 8 single-ended channels |
| Sample Rate | 500 kSPS |
| ADC Architecture | Successive approximation register SAR ADC |
| Aggregate Throughput | 500 kSPS |
| Bipolar Input Range | ±10.24 V |
| Bipolar Input Range | ±5.12 V |
| Bipolar Input Range | ±2.56 V |
| Unipolar Input Range | 0 V to 10.24 V |
| Unipolar Input Range | 0 V to 5.12 V |
| Analog Supply Voltage | 5 V |
| Digital I/O Supply Voltage | 1.65 V to 5 V |
| Digital Supply Voltage | 1.65 V to 5.25 V |
| Input Impedance | 1 MΩ |
| Input Overvoltage Protection | Up to ±20 V |
| Internal Reference Voltage | 4.096 V |
| DNL | ±0.5 LSB |
| INL | ±0.75 LSB |
| SNR | 92 dB |
| THD | -102 dB |
| Power Consumption | 65 mW |
| Interface | SPI-compatible serial interface |
| Auxiliary Input | AUX_IN direct connection to ADC inputs |
| Operating Temperature Range | -40°C to 125°C |
| Package | TSSOP-38 |
| Package Case | TSSOP-38, 9.70 mm x 4.40 mm nominal body size |
| Datasheet Status | request_only |
Product Overview
The ADS8688 is a Texas Instruments Signal_Chain 16-bit SAR ADC built around a successive approximation register architecture. It integrates 8 single-ended channels with 500 kSPS sample rate and aggregate throughput, making it suitable for multi-channel voltage measurement where per-channel input-range configuration is required.
The analog front end supports software-programmable bipolar input ranges of ±10.24 V, ±5.12 V, and ±2.56 V, as well as unipolar ranges from 0 V to 10.24 V and 0 V to 5.12 V. The device maintains a constant 1 MΩ resistive input impedance independent of selected input range and includes analog input overvoltage protection up to ±20 V.
ADS8688 operates from a 5 V single analog supply, with digital supply specifications of 1.65 V to 5.25 V and digital I/O supply support from 1.65 V to 5 V. It includes a 4.096 V on-chip reference, SPI-compatible serial interface with daisy-chain support, AUX_IN direct ADC input connection, and is supplied in a TSSOP-38 package for industrial temperature operation from -40°C to 125°C.
Key Features
- 16-bit successive approximation register SAR ADC
- 8 single-ended analog input channels
- 500 kSPS sample rate and aggregate throughput
- Per-channel programmable bipolar input ranges
- Per-channel programmable unipolar input ranges
- 5 V single analog supply operation
- 1.65 V to 5.25 V digital supply range
- 1 MΩ constant resistive input impedance
- Up to ±20 V analog input overvoltage protection
- 4.096 V on-chip internal reference
- SPI-compatible serial interface with daisy-chain mode
- -40°C to 125°C industrial temperature range
Typical Applications
- Multi-channel voltage measurement
- Bipolar input data acquisition
- Unipolar input data acquisition
- SPI-connected ADC subsystems
- Industrial temperature signal acquisition
- Protected analog input monitoring
- AUX_IN direct ADC measurements
Procurement Notes
When requesting a quote for ADS8688, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of converter is the ADS8688?
The ADS8688 is a 16-bit successive approximation register SAR ADC from Texas Instruments. It belongs to the Signal_Chain category and provides 8 single-ended input channels with 500 kSPS sample rate.
Which input ranges does ADS8688 support?
ADS8688 supports software-programmable input ranges per channel. Bipolar ranges are ±10.24 V, ±5.12 V, and ±2.56 V. Unipolar ranges are 0 V to 10.24 V and 0 V to 5.12 V.
What interface is used by the ADS8688?
The ADS8688 uses an SPI-compatible serial interface and supports daisy-chain mode. It also includes an AUX_IN direct connection to the ADC inputs according to the extracted datasheet facts.
What package is specified for the ADS8688?
The ADS8688 is specified in a TSSOP-38 package. The package case is listed as TSSOP-38 with a 9.70 mm x 4.40 mm nominal body size.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.