Analog Devices Inc. AD7952BSTZRL

Overview

AD7952BSTZRL from Analog Devices is a 14-bit, 1 MSPS, fully differential successive approximation register (SAR) ADC with programmable input ranges (±10 V, ±5 V, 0–10 V, 0–5 V), iCMOS® process technology, and dual parallel/serial (SPI-compatible) interface. It integrates an internal 5 V reference (3 ppm/°C drift), temperature sensor output, and operates from −40°C to +85°C for high-speed data acquisition in instrumentation and ATE systems.

For engineers reviewing the AD7952BSTZRL datasheet, AD7952BSTZRL pinout, AD7952BSTZRL application, or AD7952BSTZRL equivalent, key selection considerations include its warp/normal/impulse mode throughput scaling (1 MSPS / 800 kSPS / 670 kSPS), no-pipeline-delay SAR architecture, ±1 LSB INL max, 85 dB SNR at 2 kHz, and 48-lead LQFP package with hardware/software configuration flexibility.

Technical Context

The AD7952BSTZRL implements a charge redistribution SAR architecture with no pipeline delay, enabling deterministic latency critical for closed-loop control. Its analog front-end supports fully differential inputs with configurable common-mode voltage (0 V to VREF/2 or VREF depending on range) and 75 dB CMRR at 100 kHz.

Digital interfacing is flexible: parallel 14-bit bus (with BYTESWAP and OB/2C format control) or serial SPI/QSPI/MICROWIRE-compatible port supporting master/slave read-during-convert or read-after-convert modes, all with dedicated hardware pins (WARP, IMPULSE, TEN, BIPOLAR) for mode and range selection without software overhead.

Key Specifications

Pinout & Package

AD7952BSTZRL is housed in a 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed pad. Pin functions are validated per Analog Devices AD7952 Rev. A datasheet Figure 4 and Table 6.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with AD7952BSTZRL, AD7960BCPZ-RL7 trades integrated reference and temperature sensing for higher resolution and speed but increases BOM count and layout complexity, while ADS8860IDRCT reduces size and power at the expense of input flexibility and system-level integration features.

Availability

AD7952BSTZRL is available at Aetrix Electronics and suitable for process control, medical instrumentation, high-speed data acquisition, digital signal processing, and automated test equipment requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for AD7952BSTZRL 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The AD7952BSTZRL belongs to Analog Devices' PulSAR® family of high-speed SAR ADCs, engineered for precision data acquisition in industrial, medical, and test equipment where deterministic latency, wide input range, and system integration matter more than pipeline architecture.

FAQ

What is the maximum differential input voltage range supported by the AD7952BSTZRL?

The AD7952BSTZRL supports four programmable differential input ranges: 0 V to 5 V (10 V p-p), 0 V to 10 V (20 V p-p), ±5 V (20 V p-p), and ±10 V (40 V p-p). These are selected using the TEN and BIPOLAR hardware pins. The ±10 V range allows full-scale differential signals up to 40 V peak-to-peak, enabled by the iCMOS® process and ±15 V VCC/VEE supplies.

Does the AD7952BSTZRL require an external reference, or does it have an internal one?

The AD7952BSTZRL includes an internal 5 V reference with typical drift of 3 ppm/°C over −40°C to +85°C, accessible on the REF pin when PDREF and PDBUF are low. An external reference (4.75 V to AVDD + 0.1 V) can be used instead by setting PDREF/PDBUF high. The internal reference eliminates need for external components in most applications, while retaining flexibility for higher-accuracy systems.

How does the AD7952BSTZRL handle timing-critical conversions in real-time control systems?

The AD7952BSTZRL uses a no-pipeline-delay SAR architecture with deterministic conversion times: 850 ns in warp mode, 1100 ns in normal mode, and 1350 ns in impulse mode. The BUSY pin's falling edge provides a hardware-asserted data-ready signal, and CNVST accepts asynchronous falling-edge triggers - enabling cycle-accurate synchronization with FPGA or DSP timers without software overhead or variable latency.

Can the AD7952BSTZRL operate with both 3.3 V and 5 V digital interfaces?

Yes. The AD7952BSTZRL's OVDD supply accepts 2.7 V to 5.25 V, allowing direct interfacing with 3.3 V or 5 V logic families. Its digital outputs (D[13:0], SDOUT, SYNC, etc.) are specified for VOH ≥ OVDD − 0.6 V and VOL ≤ 0.4 V, and inputs accept VIH ≥ 2.1 V (for 3.3 V OVDD) or VIH ≥ 3.5 V (for 5 V OVDD), ensuring robust operation across mixed-voltage systems without level shifters.

What package type and lead count does the AD7952BSTZRL use, and is thermal performance documented?

The AD7952BSTZRL uses a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed pad. Thermal resistance is documented as θJA = 91°C/W (free-air) and θJC = 30°C/W. The exposed pad must be soldered to PCB ground for optimal thermal and electrical performance, though electrical functionality is maintained without it per datasheet Note 2.