Specifications
| Type | Description |
|---|---|
| Part Number | ADS7953 |
| Manufacturer | Texas Instruments |
| Product Type | Successive Approximation ADC |
| Category | Signal Chain |
| ADC Resolution | 12 bit |
| Input Channel Count | 16 channels |
| Sample Rate | 1 MSPS |
| Architecture | Capacitor-based SAR ADC |
| Analog Supply Voltage | 2.7 V to 5.25 V |
| Digital I/O Supply Voltage | 1.7 V to 5.25 V |
| Serial Interface Clock Rate | 20 MHz |
| Input Range 1 | 0 to VREF |
| Input Range 2 | 0 to 2 x VREF |
| Channel Selection | Auto and manual modes |
| Alarm Thresholds | Two programmable levels per channel |
| Package | 38-pin TSSOP or 32-pin VQFN |
| TSSOP Body Size | 9.70 mm x 4.40 mm |
| VQFN Body Size | 5.00 mm x 5.00 mm |
| GPIO Count (TSSOP) | 4 |
| GPIO Count (VQFN) | 1 |
| Typical Power Dissipation | 14.5 mW @ 5 V, 3 V, 1 MSPS |
| Power-Down Current | 1 uA |
| Input Bandwidth | 47 MHz typ (-3 dB) |
| Datasheet Source | Manufacturer technical datasheet |
| Datasheet Status | request_only |
Product Overview
The ADS7953 is a Texas Instruments 12-bit multichannel successive approximation register (SAR) ADC in the Signal Chain category. It is identified as a 16-channel device within the ADS7950/ADS7951/ADS7952/ADS7953 family and operates at 1 MSPS sampling rate. Its capacitor-based SAR ADC architecture includes an inherent sample-and-hold function, and the device provides zero conversion latency. The device supports software-selectable unipolar input ranges of 0 to VREF and 0 to 2 x VREF, enabling flexible signal scaling without external dividers. Auto and manual channel selection modes support efficient multichannel scanning. The serial interface operates at up to 20 MHz clock rate, and each channel features two programmable alarm thresholds for monitoring applications. For 16-channel and 12-channel configurations, package options include a 38-pin TSSOP (9.70 mm x 4.40 mm) and a 32-pin VQFN (5.00 mm x 5.00 mm). The TSSOP version provides 4 individually configurable GPIOs while the VQFN version provides 1 GPIO. Typical power dissipation is 14.5 mW at 1 MSPS with a 5 V analog supply and 3 V digital supply, with a power-down current of 1 uA.
Key Features
- 12-bit capacitor-based SAR ADC architecture
- 16-channel input configuration for multichannel signal acquisition
- 1 MSPS sampling rate with zero conversion latency
- 20 MHz serial interface clock operation
- Software-selectable 0 to VREF input range
- Software-selectable 0 to 2 x VREF input range
- Auto and manual software channel selection modes
- Two programmable alarm levels per channel
- 2.7 to 5.25 V analog supply range
- 1.7 to 5.25 V digital I/O supply range
- 47 MHz typical input bandwidth
- Power-down current specified at 1 uA
Typical Applications
- Multichannel analog signal acquisition
- Signal chain data conversion
- Software-scanned channel monitoring
- Threshold alarm monitoring inputs
- Serial ADC interface designs
- Low-power acquisition systems
- Industrial sensor interfaces
- Battery monitoring systems
Procurement Notes
When requesting a quote for ADS7953, 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 resolution and channel count does ADS7953 provide?
ADS7953 is a 12-bit multichannel SAR ADC with 16 input channels. It belongs to the ADS7950/ADS7951/ADS7952/ADS7953 family and is suitable for multichannel signal acquisition applications.
What input voltage ranges does the ADS7953 support?
The device supports software-selectable unipolar input ranges of 0 to VREF and 0 to 2 x VREF. This allows flexible scaling of input signals to match the ADC full-scale range without external attenuation.
What package options are available for ADS7953?
For 16- and 12-channel devices, the ADS7953 is offered in a 38-pin TSSOP (9.70 mm x 4.40 mm) and a 32-pin VQFN (5.00 mm x 5.00 mm). The TSSOP version includes 4 configurable GPIO pins.
What is the power consumption of ADS7953 at full speed?
Typical power dissipation is 14.5 mW when operating at 1 MSPS with a 5 V analog supply and 3 V digital I/O supply. In power-down mode the current drops to 1 uA, making it suitable for power-sensitive systems.
Can the ADS7953 be used for alarm and threshold monitoring?
Yes. Each channel features two programmable alarm levels (high and low thresholds) that can be set up to 4092 LSB maximum. This enables autonomous threshold monitoring without continuous processor intervention.
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.