Texas Instruments ADS8528SRGCR

Overview

ADS8528SRGCR from Texas Instruments is a 12-bit, 8-channel simultaneous-sampling SAR ADC with true bipolar inputs, 650 kSPS parallel data rate, 73.9 dB SNR, and ±12 V input voltage support via programmable internal reference. It serves as the front-end digitizer in high-accuracy industrial power monitoring systems.

For engineers reviewing the ADS8528SRGCR datasheet, ADS8528SRGCR pinout, ADS8528SRGCR application, or ADS8528SRGCR equivalent, key selection criteria include simultaneous sampling across four channel pairs, auto-sleep mode for low-power operation at 10 kSPS, hardware/software configuration flexibility, and VQFN-64 package compatibility with extended industrial temperature range (–40°C to +125°C).

Technical Context

The ADS8528SRGCR implements eight independent SAR cores grouped into four synchronized channel pairs (A–D), each supporting true bipolar analog inputs up to ±12 V. Its dual-mode interface-selectable parallel (16-bit bus) or serial (daisy-chain capable)-is controlled by the PAR/SER pin and configurable register bits.

Internal architecture includes a 10-bit string DAC for programmable reference tuning (0.5 V–2.5 V or 0.5 V–3.0 V), dedicated per-pair reference decoupling pins (REFAP/AN, REFBP/BN, etc.), and asynchronous conversion start signals (CONVST_A–D) enabling staggered or fully simultaneous acquisition. Auto-sleep mode reduces power to 32 mW at 10 kSPS by gating internal clocks after conversion completion.

Key Specifications

Pinout & Package

ADS8528SRGCR is housed in a 64-pin VQFN package (9.0 mm × 9.0 mm, 7.3 mm × 7.3 mm exposed thermal pad), optimized for thermal performance in high-density industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit simultaneous-sampling ADC applications.

Compared with ADS8548SRGCR, the ADS8528SRGCR trades 2 bits of resolution and 50 kSPS for lower power and reduced FPGA resource usage; versus AD7606BSTZ, it adds reference programmability and higher speed at the cost of greater configuration complexity.

Availability

ADS8528SRGCR 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 ranges and long production lifecycles.

Supply support for ADS8528SRGCR 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 energy infrastructure markets.

The ADS85x8 product line was designed specifically for high-fidelity, multi-channel simultaneous sampling in safety-critical power systems - emphasizing robustness, timing integrity, and configurability across harsh operating environments.

FAQ

What is the maximum sampling rate of the ADS8528SRGCR in parallel interface mode?

The ADS8528SRGCR achieves a maximum data rate of 650 kSPS per channel in parallel interface mode. This rate is sustained across all eight channels simultaneously when using the 16-bit parallel data bus and proper timing margins per the SBAS543C datasheet Section 7.10. The ADS8528SRGCR's parallel interface supports single-cycle read access, making it suitable for high-throughput real-time control loops without FIFO buffering.

Does the ADS8528SRGCR support true bipolar input ranges up to ±12 V?

Yes, the ADS8528SRGCR supports true bipolar analog inputs up to ±12 V using its programmable internal reference and external HVDD/HVSS supplies. With HVDD = +15 V and HVSS = –15 V, and the internal reference set to 2.5 V with RANGE bit = 0, the full-scale range becomes ±4 × 2.5 V = ±10 V; extending to ±12 V is achieved via external scaling or reference adjustment per Section 7.5 of the ADS8528SRGCR datasheet.

How does the auto-sleep mode function in the ADS8528SRGCR?

The ADS8528SRGCR auto-sleep mode reduces power consumption to 32 mW at 10 kSPS by automatically disabling internal clocks six conversion clock cycles after a CONVST_x trigger completes. Enabled via the ASLEEP pin, this feature maintains full functionality - including register state and reference stability - while eliminating dynamic power in idle periods, critical for thermally constrained industrial enclosures.

Can the ADS8528SRGCR be configured via hardware pins or only through software registers?

The ADS8528SRGCR supports both hardware and software configuration modes. The HW/SW pin selects between them: when low, settings like RANGE, PAR/SER, and REFEN are controlled by external pins; when high, the Configuration register (CONFIG) governs all functions. This dual-mode capability allows the ADS8528SRGCR to serve both fixed-function systems and adaptable firmware-driven architectures without hardware redesign.

What package type and thermal characteristics does the ADS8528SRGCR use?

The ADS8528SRGCR uses a 64-pin VQFN package (RGC suffix) with a 9.0 mm × 9.0 mm body 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 in ambient temperatures up to +125°C when mounted on a 2-layer PCB with adequate copper pour, as validated in TI's SBAS543C thermal characterization.