Texas Instruments ADS8548SRGCR

Overview

ADS8548SRGCR from Texas Instruments is a 14-bit, 8-channel simultaneous-sampling SAR ADC with true bipolar inputs, 600 kSPS parallel/450 kSPS serial data rate, 85 dB SNR, and ±12 V input range support via programmable reference. It serves as the high-precision analog front-end in multi-channel industrial power monitoring systems.

For engineers reviewing the ADS8548SRGCR datasheet, ADS8548SRGCR pinout, ADS8548SRGCR application, or ADS8548SRGCR equivalent, key selection criteria include simultaneous sampling integrity across four channel pairs, auto-sleep power scaling (32 mW at 10 kSPS), hardware/software-configurable interface mode, and extended temperature operation from –40°C to +125°C.

Technical Context

The ADS8548SRGCR implements eight independent SAR cores grouped into four synchronized channel pairs (A–D), each supporting true bipolar input ranges up to ±12 V via internal 2.5-V/3.0-V programmable reference and external HVDD/HVSS supplies. Conversion timing is controlled by dedicated CONVST_x signals per pair or global start.

It supports dual interface modes: 16-bit parallel bus (with RD/WR/CS) or daisy-chainable 4-wire SPI-compatible serial interface (SCLK/SDI/SDO_A–D), with configurable output routing (SEL_B/SEL_CD) and clock sourcing (XCLK as input/output). Internal configuration register enables software control of range, power-down, buffer enable, and standby.

Key Specifications

Pinout & Package

ADS8548SRGCR is packaged in a 64-pin VQFN (RGC) with 9.0 mm × 9.0 mm body size and exposed thermal pad for enhanced heat dissipation in high-density industrial designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar simultaneous-sampling ADC applications.

Compared with ADS8548SRGCR, ADS8568SRGCR trades speed and power efficiency for higher resolution, while AD7606C-18BSTZ sacrifices voltage range flexibility and reference programmability for integrated signal conditioning and higher throughput - making ADS8548SRGCR optimal for ±12 V, software-configurable, thermally demanding industrial systems.

Availability

ADS8548SRGCR is available at Aetrix Electronics and suitable for protection relays, power quality analyzers, and multi-axis motor controls requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADS8548SRGCR 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 and embedded processing technologies, with decades of expertise in precision data converters for industrial and automotive markets.

The ADS85x8 family was designed specifically for high-reliability, multi-channel simultaneous-sampling applications in protection relays, power analyzers, and motor control systems operating across –40°C to +125°C.

FAQ

What is the maximum supported analog input voltage range for ADS8548SRGCR?

The ADS8548SRGCR supports analog input ranges up to ±12 V, achieved by configuring the internal reference (0.5–3.0 V) and applying appropriate HVDD (+15 V) and HVSS (–15 V) supplies. The RANGE pin or CONFIG register bit selects between ±4 VREF and ±2 VREF scaling, allowing direct interfacing with industrial current/voltage transducers without external gain stages. This capability is confirmed in the device's Recommended Operating Conditions and Electrical Characteristics tables.

Does ADS8548SRGCR support true simultaneous sampling across all eight channels?

Yes, ADS8548SRGCR supports true simultaneous sampling across all eight channels by grouping them into four synchronized pairs (A–D), each triggered by dedicated CONVST_x pins. When all four CONVST signals are asserted simultaneously, the internal timing architecture ensures aperture delay matching within 100 ps - a specification verified in the Typical Characteristics and Electrical Characteristics sections of the datasheet. This eliminates inter-channel phase error critical for vector-based calculations.

How does the auto-sleep mode reduce power consumption in ADS8548SRGCR?

The ADS8548SRGCR auto-sleep mode reduces power to 32 mW at 10 kSPS by automatically entering hold state six conversion clock cycles after CONVST assertion, minimizing active SAR core time. This feature is enabled via the ASLEEP pin or CONFIG register bit C27, and is validated across the full –40°C to +125°C range. It directly lowers thermal load in sealed enclosures and extends battery life in portable test equipment without compromising conversion accuracy.

Can ADS8548SRGCR operate with an external reference instead of the internal one?

Yes, ADS8548SRGCR can operate with an external reference applied to the REFIO pin. When the REFEN/WR pin is low (hardware mode) or CONFIG bit C15 = 0 (software mode), the internal reference is disabled and REFIO becomes a high-impedance input accepting 0.5–3.025 V. External reference selection maintains full 14-bit linearity and is supported across all operating temperatures - a capability documented in Section 7.5 (Electrical Characteristics: General) and the Pin Functions table.

What package type and thermal characteristics does ADS8548SRGCR use?

ADS8548SRGCR uses a 64-pin VQFN (RGC) package with 9.0 mm × 9.0 mm body size and exposed thermal pad. Its junction-to-ambient thermal resistance (RθJA) is 22°C/W, and junction-to-board (RθJB) is 3.6°C/W - enabling reliable operation at full speed under 125°C ambient when properly mounted on a 4-layer PCB with thermal vias. These values are specified in the Thermal Information table (Section 7.4) and validated per JEDEC JESD51 standards.