Texas Instruments ADS7960SRHBR

Overview

ADS7960SRHBR from Texas Instruments is a 12-bit, 16-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 operates from 2.7–5.25 V analog supply. It is used in high-speed PLC data acquisition systems requiring multichannel synchronized sampling.

For engineers reviewing the ADS7960SRHBR datasheet, ADS7960SRHBR pinout, ADS7960SRHBR application, or ADS7960SRHBR equivalent, key selection considerations include its 16-channel count, 12-bit resolution, TSSOP-38 package footprint, GPIO-configurable alarm outputs, and compatibility with REF5025 reference voltage sources in isolated industrial monitoring designs.

Technical Context

The ADS7960SRHBR implements a capacitor-based SAR architecture with integrated sample-and-hold, enabling true zero-latency conversion-critical for closed-loop control. Its serial interface uses active-low CS, SCLK, SDI, and SDO signals, with sampling triggered on the falling edge of CS and conversion synchronized to SCLK.

It supports both auto-sequencing across preselected channels and manual channel selection per conversion cycle. The device includes four individually configurable GPIOs (GPIO0–GPIO3) in the TSSOP-38 package, with GPIO2 serving as Range select and GPIO3 as active-low power-down control-enabling flexible system-level signal conditioning and power management.

Key Specifications

Pinout & Package

The ADS7960SRHBR is housed in a 38-pin TSSOP package (9.70 mm × 4.40 mm) with exposed thermal pad. All pins are electrically validated per TI SLAS605C Rev C (July 2018). Pin functions are defined for the ADS7960 variant specifically, not extrapolated from family-wide tables.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7961SRHBR, the ADS7960SRHBR delivers 4× higher code density for fine-grained process control; compared with ADS8688IPWR, it offers double the channel count and 2× faster sampling at the expense of 4-bit resolution-making it optimal for high-channel-count, moderate-precision industrial DAQ.

Availability

ADS7960SRHBR is available at Aetrix Electronics and suitable for PLC/IPC systems, optical line card monitoring, medical instrumentation, digital power supplies, and high-speed closed-loop systems requiring stable component supply and long-term manufacturability.

Supply support for ADS7960SRHBR 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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and industrial interface solutions.

The ADS79xx product line was designed for high-channel-count, medium-speed industrial data acquisition-emphasizing integration (GPIOs, alarms), flexibility (dual input ranges, auto/manual sequencing), and robustness in noisy factory environments.

FAQ

What is the maximum clock frequency supported by the ADS7960SRHBR serial interface?

The ADS7960SRHBR supports a 20-MHz SCLK frequency, enabling full 12-bit data transfer within each conversion cycle at 1 MSPS. This timing is verified in Section 7.9 (Timing Requirements) of the SLAS605C datasheet. The ADS7960SRHBR requires precise setup/hold timing relative to CS and SCLK edges, and exceeding 20 MHz may cause invalid conversions or communication errors.

Does the ADS7960SRHBR require an external reference voltage, and what are the compatible options?

Yes, the ADS7960SRHBR requires an external reference applied to REFP and REFM pins. It is fully compatible with the REF5025 (2.5 V ±0.1 V), as shown in the functional diagram and application examples. Other precision references such as REF5030 or REF6025 may also be used if they meet the input resistance (>10 kΩ) and noise (<10 µVpp) specifications cited in Section 7.8 of the datasheet.

How many GPIOs does the ADS7960SRHBR provide, and what are their default configurations?

The ADS7960SRHBR provides four GPIOs (GPIO0–GPIO3) in its TSSOP-38 package. By default, GPIO2 is configured as Range select (input), GPIO3 as PD# (active-low power-down input), and GPIO0/GPIO1 as general-purpose I/Os. Their functionality is programmable via register writes over the SPI interface, as detailed in Table 12 and Section 8.5 of the SLAS605C datasheet.

Can the ADS7960SRHBR operate with separate analog and digital supply voltages?

Yes, the ADS7960SRHBR supports independent analog (+VA, 2.7–5.25 V) and digital I/O (+VBD, 1.7–5.25 V) supplies. This separation minimizes digital noise coupling into the analog conversion path. AGND and BDGND must be connected at a single point near the device, and all NC pins must be tied to AGND per layout guidelines in Section 11 of the datasheet.

What is the purpose of the MXO pin on the ADS7960SRHBR, and how is it typically used?

The MXO (Multiplexer Output) pin on the ADS7960SRHBR provides buffered access to the selected analog input channel before ADC conversion. It is commonly used to drive external signal conditioning circuits-such as the THS4031 non-inverting buffer shown in TI's reference schematics-to improve drive capability or add filtering without loading the source. MXO is not required for basic operation but enhances system flexibility.