Analog Devices Inc. AD7262BSTZ-5-RL7

Overview

AD7262BSTZ-5-RL7 from Analog Devices is a dual-channel, 12-bit, simultaneous-sampling SAR ADC with integrated programmable gain amplifier (PGA), on-chip 2.5 V reference, and four comparators. It delivers 1 MSPS throughput per channel, supports true differential analog inputs with >1 GΩ input impedance, and operates across −40°C to +105°C for motor control position feedback and sensor monitoring applications.

For engineers reviewing the AD7262BSTZ-5-RL7 datasheet, AD7262BSTZ-5-RL7 pinout, AD7262BSTZ-5-RL7 application, or AD7262BSTZ-5-RL7 equivalent, this page provides verified technical context, calibrated DC accuracy (±0.5 LSB INL), SNR (73 dB at gain = 2), comparator propagation delay (0.12 µs for C/D), and LFCSP-48 package integration details required for real-time embedded signal acquisition design.

Technical Context

The AD7262BSTZ-5-RL7 implements two independent successive approximation register (SAR) ADCs with track-and-hold stages, each preceded by a PGA offering 14 discrete gain settings (×1 to ×128). Its dual simultaneous sampling architecture ensures time-aligned conversion of VA± and VB± inputs without inter-channel skew.

Four on-chip comparators are partitioned into low-power (A/B) and fast-propagation (C/D) pairs, with separate supply domains (CA_CBVCC/CC_CDVCC) and dedicated ground references (CA_CB_GND/CC_CD_GND). The device uses SPI/QSPI/MICROWIRE-compatible serial interface with 31-clock read cycle and supports internal offset calibration and system gain calibration via control registers.

Key Specifications

Pinout & Package

AD7262BSTZ-5-RL7 is housed in a 48-lead LFCSP (7 mm × 7 mm, 0.85 mm height) with exposed metal paddle soldered to PCB ground for thermal and noise performance. Pin functions are validated per Analog Devices Rev. C datasheet Figures 3–4 and Table 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC with PGA applications.

Compared with AD7262BSTZ-5-RL7, AD7265BCPZ-RL7 offers expanded channel count at identical speed and integration, while ADS8684IPWR trades built-in analog front-end functionality for higher resolution - choice depends on whether system-level timing determinism or raw quantization fidelity dominates the design requirement.

Availability

AD7262BSTZ-5-RL7 is available at Aetrix Electronics and suitable for motor control position feedback, industrial sensor signal conditioning, real-time current monitoring, and embedded power quality analysis requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7262BSTZ-5-RL7 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 R&D and manufacturing facilities worldwide.

The AD7262 product line targets high-accuracy, real-time analog acquisition in motion control and industrial automation, integrating PGA, dual simultaneous ADCs, and comparators to replace multi-chip signal chains in space-constrained designs.

FAQ

What is the maximum sampling rate supported by the AD7262BSTZ-5-RL7?

The AD7262BSTZ-5-RL7 supports a maximum throughput rate of 1 MSPS per ADC channel. This is achieved with a 40 MHz SCLK and 19-clock conversion time, enabling sub-microsecond sampling intervals for high-bandwidth motor control loops. The AD7262BSTZ-5-RL7 maintains this rate across its full operating temperature range (−40°C to +105°C) when powered from AVCC = 5.25 V and using the internal 2.5 V reference.

Does the AD7262BSTZ-5-RL7 require an external reference voltage?

No, the AD7262BSTZ-5-RL7 includes an on-chip 2.5 V reference with ±5 mV initial accuracy and 20 ppm/°C temperature coefficient, which can be enabled via the REFSEL pin. When REFSEL is high, VREFA and VREFB output buffered 2.5 V; when low, external references up to 5.25 V may be applied. The AD7262BSTZ-5-RL7's internal reference eliminates BOM cost and layout area unless ratiometric measurement against a system rail is required.

How does the PGA gain selection work on the AD7262BSTZ-5-RL7?

The AD7262BSTZ-5-RL7 uses four logic inputs (G0–G3) to select one of 14 PGA gain settings (×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128). These pins are sampled at power-up or after reset. If all G0–G3 are tied low, PD0/DIN becomes a serial data input, allowing dynamic gain reconfiguration via the control register - useful for adaptive gain in varying sensor output ranges.

Can the AD7262BSTZ-5-RL7 perform simultaneous sampling of two channels?

Yes, the AD7262BSTZ-5-RL7 features true dual simultaneous sampling: both ADCs acquire VA± and VB± at the exact same instant using independent track-and-hold circuits. Conversion results appear simultaneously on DOUTA and DOUTB after 19 SCLK cycles. This eliminates phase skew critical for vector control algorithms - confirmed in the functional block diagram and timing specifications of the AD7262BSTZ-5-RL7 datasheet Rev. C.

What are the power consumption characteristics of the AD7262BSTZ-5-RL7 in normal operation?

In ADC normal mode (dynamic), the AD7262BSTZ-5-RL7 draws 23–33.3 mA at AVCC = 5.25 V, equating to 120–175 mW total power dissipation. Shutdown mode reduces current to 0.5–1 µA. Comparator power varies by type: A/B consume 3–8.5 µA each at CA_CBVCC = 3.3–5.25 V, while C/D draw 60–170 µA each - enabling selective activation based on real-time monitoring needs.