Analog Devices Inc. AD7262BSTZ-5

Overview

AD7262BSTZ-5 from Analog Devices is a dual-channel, 12-bit simultaneous-sampling SAR ADC with integrated PGA (×1 to ×128), on-chip 2.5 V reference, and four comparators. It delivers 500 kSPS per channel, supports true differential analog inputs, and operates across −40°C to +105°C for motor control position feedback and sensor monitoring applications.

For engineers reviewing the AD7262BSTZ-5 datasheet, AD7262BSTZ-5 pinout, AD7262BSTZ-5 application, or AD7262BSTZ-5 equivalent, this page provides verified technical context, calibrated DC/dynamic specs, comparator timing behavior, SPI-compatible serial interface details, and validated alternative options for industrial encoder interface designs.

Technical Context

The AD7262BSTZ-5 implements two independent successive approximation register (SAR) ADCs with track-and-hold stages, each preceded by a programmable gain amplifier supporting 14 discrete gains (×1–×128). Its dual simultaneous sampling architecture enables synchronized acquisition of two analog signals-critical for phase-sensitive measurements in motor control.

Four integrated comparators are partitioned into two low-power pairs (A/B) and two high-speed pairs (C/D), with propagation delays as low as 0.12 µs (CC_CDVCC = 5 V) and offset drift ≤0.5 µV/°C. The device uses a single 5 V AVCC supply, with separate VDRIVE (2.7–5.25 V) for logic level definition and CA_CBVCC/CC_CDVCC supplies for comparator domains.

Key Specifications

Pinout & Package

AD7262BSTZ-5 is housed in a 48-lead LFCSP (7 mm × 7 mm, 0.8 mm height) with exposed thermal paddle requiring solder connection to PCB ground. Pin functions are validated per Analog Devices Rev. C datasheet Figure 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 AD7262BCPZ-5, AD7262BSTZ-5 offers identical performance in a CP-48-4 package with documented thermal pad soldering requirements; versus AD7265BRUZ, it trades 2-bit resolution for on-chip comparators and lower power-making it superior for cost-constrained, space-limited motor control designs requiring embedded timing logic.

Availability

AD7262BSTZ-5 is available at Aetrix Electronics and suitable for motor control position feedback, industrial sensor signal conditioning, power quality monitoring, and condition monitoring systems requiring stable component supply across extended temperature ranges.

Supply support for AD7262BSTZ-5 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.

The AD7262 product line targets high-accuracy, multi-channel data acquisition in harsh industrial environments-designed specifically for simultaneous sampling of encoder, resolver, and sensor signals in motion control and automation systems.

FAQ

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

The AD7262BSTZ-5 supports a maximum throughput rate of 500 kSPS per ADC channel. This is achieved with fSCLK = 20 MHz and requires 31 serial clock cycles per conversion. The 500 kSPS rating is fixed for the -5 variant and cannot be increased to 1 MSPS like the base AD7262; attempting higher rates results in invalid data due to insufficient conversion time.

Does the AD7262BSTZ-5 require an external reference, or can it operate with its internal reference?

The AD7262BSTZ-5 can operate with its internal 2.5 V reference when the REFSEL pin is tied high. The on-chip reference has ±5 mV initial accuracy and 20 ppm/°C temperature coefficient. External references may be used by tying REFSEL low and applying a stable voltage to VREFA/VREFB-enabling system-level reference sharing or improved long-term stability.

How are the four comparators differentiated in the AD7262BSTZ-5?

The AD7262BSTZ-5 integrates two comparator pairs: Comparators A and B are optimized for ultra-low power (≤8.5 µA at 5.25 V), while Comparators C and D prioritize speed (propagation delay as low as 0.12 µs at 5 V). Each pair has independent supply domains (CA_CBVCC and CC_CDVCC) and ground references (CA_CB_GND and CC_CD_GND), allowing flexible biasing and noise isolation.

Can the AD7262BSTZ-5 perform simultaneous sampling with independent PGA gain settings per channel?

Yes-the AD7262BSTZ-5 supports independent PGA gain configuration for each ADC channel via separate G0–G3 pins. Gain selection is decoded in parallel for both channels, enabling different scaling factors (e.g., ×2 for VA±, ×32 for VB±) without software intervention or timing penalties. This is confirmed in the Functional Block Diagram and Table 4 of the Rev. C datasheet.

What package type and thermal considerations apply to the AD7262BSTZ-5?

The AD7262BSTZ-5 uses a 48-lead LFCSP (CP-48-4) with an exposed metal thermal paddle. Per Analog Devices' design guidance, this paddle must be soldered to a solid PCB ground plane to ensure proper heat dissipation (θJC = 3°C/W), reduce noise coupling, and provide mechanical reliability. Failure to connect the paddle degrades thermal performance and increases jitter.