Analog Devices Inc. AD4002BRMZ-RL7

Overview

AD4002BRMZ-RL7 from Analog Devices is an 18-bit, 2 MSPS pseudo-differential successive approximation register (SAR) analog-to-digital converter with Easy Drive architecture, single 1.8 V supply operation, ±3.2 LSB INL, 95 dB SNR at 1 kHz, and input overvoltage clamp protection-designed for high-precision data acquisition in automated test equipment and medical instrumentation.

For engineers reviewing the AD4002BRMZ-RL7 datasheet, AD4002BRMZ-RL7 pinout, AD4002BRMZ-RL7 application, or AD4002BRMZ-RL7 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal performance (θJA = 147°C/W), real-world acquisition timing (290 ns), and two rigorously cross-checked alternative SAR ADCs suitable for precision industrial and battery-powered systems.

Technical Context

The AD4002BRMZ-RL7 implements a true SAR conversion architecture with no pipeline latency, delivering first-conversion accuracy and deterministic timing. Its Easy Drive input stage reduces differential input current to 0.3 nA (typ) during acquisition and extends acquisition phase to ≥79% of cycle time at 1 MSPS-enabling direct drive from low-power op amps without external buffering.

It supports pseudo-differential input range of 0 V to VREF (2.4 V–5.1 V), span compression for single-supply signal chains, and SPI/QSPI/MICROWIRE-compatible serial interface with 1.71 V–5.5 V VIO logic supply. Input overvoltage clamp sinks up to 50 mA while limiting disturbance on REF and eliminating need for external diodes.

Key Specifications

Pinout & Package

AD4002BRMZ-RL7 is housed in a 10-lead MSOP package (3 mm × 4.90 mm), RoHS-compliant, with exposed pad connected to GND for thermal enhancement (θJA = 147°C/W, θJC = 38°C/W). Pinout validated per Analog Devices Figure 3 and Table 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit SAR ADC applications.

Compared with AD4002BRMZ-RL7, AD4003BRMZ-RL7 offers identical form-factor and interface compatibility at lower speed, while ADS8860IDRCT trades resolution, protection, and ease-of-drive for vendor-specific integration-making AD4002BRMZ-RL7 the optimal choice for new designs demanding 18-bit fidelity, 2 MSPS, and simplified analog front-end design.

Availability

AD4002BRMZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical imaging subsystems, and industrial process monitoring requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for AD4002BRMZ-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 operations spanning 15+ countries.

The AD4002BRMZ-RL7 belongs to the AD400x family of Easy Drive precision SAR ADCs-engineered specifically for high-channel-density, low-power, wide-dynamic-range data acquisition in space-constrained, thermally sensitive applications.

FAQ

What is the maximum sample rate supported by the AD4002BRMZ-RL7?

The AD4002BRMZ-RL7 supports a maximum throughput rate of 2 MSPS when turbo mode is enabled and the serial clock (SCK) operates at ≥75 MHz. This is validated in Table 4 of the datasheet under "3-Wire and 4-Wire Turbo Mode" conditions. At lower SCK frequencies or in standard mode, the achievable rate drops to 1.75 MSPS or less. The AD4002BRMZ-RL7 achieves this with a fixed 270–320 ns conversion time and 290 ns acquisition phase-ensuring deterministic timing for real-time control loops.

Does the AD4002BRMZ-RL7 require an external reference voltage?

Yes, the AD4002BRMZ-RL7 requires an external reference voltage applied to the REF pin, which must be between 2.4 V and 5.1 V. The device does not include an internal reference. Reference current draw is 0.75 mA at 2 MSPS (VREF = 5 V), and the REF pin must be decoupled with a minimum 10 μF X7R ceramic capacitor to GND to maintain SNR and INL performance. The AD4002BRMZ-RL7's span compression feature allows full-code utilization even when driven by single-supply amplifiers.

Can the AD4002BRMZ-RL7 operate from a single 1.8 V supply?

Yes, the AD4002BRMZ-RL7 operates from a single 1.8 V analog supply (VDD = 1.71 V to 1.89 V) and supports independent digital I/O voltage (VIO = 1.71 V to 5.5 V). This dual-supply flexibility enables direct interfacing with 1.8 V, 3.3 V, or 5 V microcontrollers and FPGAs without level shifters. Total power consumption is 14 mW at 2 MSPS (VDD only), with VIO contributing only 0.6 mW under same conditions-making the AD4002BRMZ-RL7 highly efficient for mixed-voltage embedded systems.

What protection features does the AD4002BRMZ-RL7 provide against input overvoltage?

The AD4002BRMZ-RL7 integrates an input overvoltage clamp that safely sinks up to 50 mA at IN+ and IN− while limiting disturbance on the REF pin. Clamp activation thresholds are 5.25–5.4 V (VREF = 5 V) or 2.68–2.8 V (VREF = 2.5 V), with deactivation time of 360 ns. This eliminates the need for external Schottky diodes or TVS devices in most industrial and medical front-ends. The clamp is rated for 10 ms overvoltage events per Absolute Maximum Ratings table, and it preserves ADC functionality without latch-up.

Is the AD4002BRMZ-RL7 pin-compatible with other members of the AD400x family?

Yes, the AD4002BRMZ-RL7 is pin-compatible with AD4003/AD4007/AD4011 in the same 10-lead MSOP (RM-10) and LFCSP (CP-10-9) packages. This allows drop-in replacement across speed grades: AD4002 (2 MSPS), AD4003 (1 MSPS), and AD4006 (1 MSPS, different INL spec). Pin mapping-including REF, VDD, IN+, IN−, GND, CNV, SDO, SCK, SDI, and VIO-is identical across all variants, enabling hardware reuse and simplified BOM rationalization in scalable product families.