Analog Devices Inc. AD4003BRMZ-RL7

Overview

AD4003BRMZ-RL7 from Analog Devices is a high-accuracy, 18-bit, 2 MSPS differential SAR ADC with Easy Drive architecture, single 1.8 V supply operation, ±5 V input range (with 5 V reference), and SPI/QSPI/MICROWIRE-compatible serial interface. It delivers 100.5 dB SNR at 1 kHz and −123 dB THD, enabling precision data acquisition in battery-powered instrumentation.

For engineers reviewing the AD4003BRMZ-RL7 datasheet, AD4003BRMZ-RL7 pinout, AD4003BRMZ-RL7 application, or AD4003BRMZ-RL7 equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, 290 ns acquisition time at 2 MSPS, input overvoltage clamp (50 mA sink), low 0.3 nA analog input current, and 3 mm × 3 mm LFCSP-10 package compatibility with AD4000/AD4004/AD4008 family.

Technical Context

The AD4003BRMZ-RL7 implements a successive approximation register (SAR) architecture with integrated Easy Drive circuitry that extends acquisition phase to ≥79% of cycle time at 2 MSPS and reduces input current to 0.3 nA (typ) during acquisition. Its differential input stage supports ±VREF range with optional span compression and built-in overvoltage clamping (5.4 V clamp threshold at 5 V VREF).

Digital interface operates via SPI-compatible 3- or 4-wire mode with turbo mode support, configurable status bits, and daisy-chain capability. Power scales linearly with throughput: 16 mW total at 2 MSPS, 2.4 mW from VDD only, and 80 μW at 10 kSPS - all with 1.71–1.89 V VDD and 1.71–5.5 V VIO logic supply.

Key Specifications

Pinout & Package

AD4003BRMZ-RL7 is housed in a 10-lead, 3 mm × 3 mm lead frame chip scale package (LFCSP) with exposed pad for thermal enhancement and ground connection. Pin numbering follows standard LFCSP-10 configuration (pin 1 marked by dot).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD4003BRMZ-RL7, AD4007BRMZ-RL7 trades speed for lower power and relaxed timing margins, while AD4020BRMZ-RL7 upgrades resolution and SNR at the expense of throughput and package size - both require PCB redesign due to non-pin-compatible footprints.

Availability

AD4003BRMZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, precision industrial sensor hubs, and battery-powered data loggers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for AD4003BRMZ-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 design centers worldwide and ISO 9001-certified manufacturing.

The AD4003BRMZ-RL7 belongs to Analog Devices' Easy Drive SAR ADC product line, engineered specifically for high-channel-density, low-power precision data acquisition systems where driver complexity and power efficiency are critical constraints.

FAQ

What is the maximum achievable throughput of the AD4003BRMZ-RL7 and what conditions are required?

The AD4003BRMZ-RL7 achieves 2 MSPS maximum throughput only when turbo mode is enabled and the SCK clock frequency is ≥75 MHz with VIO ≥ 2.7 V. At lower SCK rates or disabled turbo mode, throughput drops to 1.75–1.78 MSPS. The 290 ns conversion time and 290 ns acquisition phase are fixed at this rate, and timing parameters like tQUIET1 (190 ns) must be strictly observed to maintain 100.5 dB SNR performance in the AD4003BRMZ-RL7.

Does the AD4003BRMZ-RL7 require an external driver amplifier for its analog inputs?

No, the AD4003BRMZ-RL7 does not require an external driver amplifier in most cases due to its Easy Drive architecture, which reduces input current to 0.3 nA (typ) and extends acquisition time to 290 ns - sufficient for direct driving by low-output-impedance sources like precision op-amps or resistive sensors. The AD4003BRMZ-RL7's input overvoltage clamp and span compression further simplify front-end design by eliminating negative supply requirements and external protection components.

What reference voltage range is supported by the AD4003BRMZ-RL7 and how does it affect performance?

The AD4003BRMZ-RL7 supports an external reference voltage (VREF) from 2.4 V to 5.1 V. Performance scales directly with VREF: SNR is 100.5 dB at 5 V and 94.5 dB at 2.5 V; INL remains ±1.0 LSB across the range. The AD4003BRMZ-RL7 draws 1.1 mA reference current at 2 MSPS, so the reference source must be low-noise and capable of supplying ≥1.5 mA peak current to avoid gain error drift.

Can the AD4003BRMZ-RL7 operate from a single 1.8 V supply, and what are the logic interface voltage requirements?

Yes, the AD4003BRMZ-RL7 operates from a single 1.71–1.89 V analog supply (VDD), while its digital I/O uses a separate VIO supply ranging from 1.71 V to 5.5 V - enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V microcontrollers without level shifters. The AD4003BRMZ-RL7's SPI interface is fully compatible with these logic families, and VOL/VOH thresholds are dynamically scaled to VIO, ensuring robust communication across voltage domains.

Is the AD4003BRMZ-RL7 pin-compatible with other devices in the AD400x family?

Yes, the AD4003BRMZ-RL7 is pin-compatible with the AD4000/AD4004/AD4008 family in the same 10-lead LFCSP package, sharing identical pinout, footprint, and power sequencing requirements. This allows direct substitution for resolution or speed upgrades - for example, replacing AD4000BRMZ-RL7 (16-bit, 1 MSPS) with AD4003BRMZ-RL7 (18-bit, 2 MSPS) without PCB changes, provided layout adheres to Analog Devices' recommended grounding and decoupling guidelines for the AD4003BRMZ-RL7.