Texas Instruments ADS7952SRHBR

Overview

ADS7952SRHBR from Texas Instruments is a 12-bit, 12-channel, single-ended SAR analog-to-digital converter with 1-MSPS sample rate, zero-latency operation, and 20-MHz serial interface. It features two software-selectable unipolar input ranges (0 to VREF and 0 to 2×VREF), programmable per-channel high/low alarm thresholds, and four GPIOs - used in PLC analog input modules for real-time sensor monitoring.

For engineers reviewing the ADS7952SRHBR datasheet, ADS7952SRHBR pinout, ADS7952SRHBR application, or ADS7952SRHBR equivalent, key selection considerations include its 12-channel count, TSSOP-30 package footprint, 1-MSPS throughput with zero latency, dual input range flexibility, and integrated alarm logic for autonomous over/under-range detection in industrial data acquisition systems.

Technical Context

The ADS7952SRHBR implements a capacitor-based SAR architecture with inherent sample-and-hold, accepting analog supply voltages from 2.7 V to 5.25 V and I/O supply from 1.7 V to 5.25 V. Its serial interface uses active-low CS, SCLK, SDI, and SDO signals for microprocessor/DSP interfacing, with sampling triggered on the falling edge of CS.

Channel selection operates in auto-sequencing or manual mode; each of the 12 analog inputs supports independent alarm threshold configuration. The device includes four programmable GPIOs (GPIO0–GPIO3) in the TSSOP package, with GPIO2 serving as Range select and GPIO3 as active-low power-down control - enabling flexible system-level event response without host intervention.

Key Specifications

Pinout & Package

The ADS7952SRHBR is housed in a 30-pin TSSOP package (7.80 mm × 4.40 mm) with exposed thermal pad. Pin assignments are fully defined in TI SLAS605C Rev C, supporting 12 analog input channels plus dedicated reference, serial interface, GPIO, and power terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel SAR ADC applications.

Compared with ADS7953SRHBR, the ADS7952SRHBR offers optimal channel count for 12-sensor systems without over-provisioning; versus ADS8688IPWR, it trades resolution for integrated alarms, GPIOs, and footprint compatibility - making it superior for cost-sensitive, event-driven industrial I/O.

Availability

ADS7952SRHBR is available at Aetrix Electronics and suitable for PLC analog input modules, optical line card monitoring systems, and medical patient monitors requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.

Supply support for ADS7952SRHBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies - with decades of expertise in precision data converters for industrial and medical markets.

The ADS79xx family was designed specifically for high-channel-count, medium-speed industrial data acquisition - emphasizing zero-latency operation, flexible input scaling, autonomous alarm generation, and robust serial interfacing in harsh environments.

FAQ

What is the maximum sample rate supported by the ADS7952SRHBR?

The ADS7952SRHBR supports a maximum sample rate of 1 MSPS (1 million samples per second) with zero latency. This rate is achievable across all 12 channels in auto-sequencing mode or any single channel in manual mode, provided the serial clock (SCLK) frequency is set to 20 MHz and the analog supply (+VA) is within 2.7 V to 5.25 V. The ADS7952SRHBR maintains full 12-bit accuracy at this rate per the electrical characteristics table in SLAS605C Rev C.

Does the ADS7952SRHBR require an external reference voltage?

Yes, the ADS7952SRHBR requires an external reference voltage applied to the REFP pin, with REFM tied to analog ground. The device supports two input ranges: 0 to VREF and 0 to 2×VREF, selected via GPIO2. A precision reference such as the REF5025 (2.5 V ±0.1 V) is recommended to achieve specified total unadjusted error (TUE) of ±1.5 LSB. The ADS7952SRHBR does not include an internal reference.

How many GPIOs are available on the ADS7952SRHBR, and what are their functions?

The ADS7952SRHBR provides four GPIOs (GPIO0–GPIO3) in its 30-pin TSSOP package. GPIO2 serves as the Range select input (high = 0 to 2×VREF, low = 0 to VREF); GPIO3 is the active-low power-down control. GPIO0 and GPIO1 are general-purpose I/Os configurable as inputs or outputs via register programming. All four GPIOs support interrupt generation and can be used for system-level event signaling without host processor intervention.

Is the ADS7952SRHBR pin-compatible with other devices in the ADS79xx family?

Yes, the ADS7952SRHBR is pin-compatible with ADS7950SRHBR, ADS7951SRHBR, ADS7953SRHBR, ADS7956SRHBR, and ADS7960SRHBR in the 30-pin TSSOP (DBT) package. All share identical pinouts, including CH0–CH11 placement, serial interface signals, GPIO locations, and power/ground assignments - enabling drop-in replacement for resolution or channel count changes without PCB redesign.

What is the purpose of the MXO pin on the ADS7952SRHBR?

The MXO (Multiplexer Output) pin on the ADS7952SRHBR provides buffered access to the analog signal selected by the internal multiplexer prior to ADC conversion. This allows external circuitry - such as a diagnostic amplifier or calibration path - to monitor the raw channel voltage in real time. The MXO pin is particularly useful for verifying signal integrity, validating sensor connections, or implementing hardware-based signal conditioning before digitization in the ADS7952SRHBR.