Analog Devices Inc. AD4000BRMZ

Overview

AD4000BRMZ from Analog Devices is a 16-bit, 2 MSPS precision pseudo-differential successive approximation register (SAR) analog-to-digital converter with Easy Drive architecture, high-Z input mode, and integrated input overvoltage clamp. It operates from a single 1.8 V supply, supports 2.4 V to 5.1 V external reference voltage, and delivers ±1.0 LSB INL, 93 dB SNR at 1 kHz, and −115 dB THD - enabling high-fidelity data acquisition in battery-powered instrumentation.

For engineers reviewing the AD4000BRMZ datasheet, AD4000BRMZ pinout, AD4000BRMZ application, or AD4000BRMZ equivalent, key selection considerations include its 2 MSPS throughput with no pipeline latency, 1.8 V single-supply operation with 1.71–5.5 V logic interface, high-Z mode for relaxed driver settling, and 10-lead MSOP/LFCSP packaging suitable for space-constrained industrial and medical signal chains.

Technical Context

The AD4000BRMZ implements a true SAR architecture with no pipeline delay, delivering first-conversion accuracy and guaranteed 16-bit no-missing-codes performance. Its Easy Drive features include an extended acquisition phase (290 ns at 2 MSPS) and high-Z mode, which reduce input settling demands on external amplifiers and enable use of lower-bandwidth, lower-power drivers.

It integrates an input overvoltage clamp that sinks up to 50 mA while limiting disturbance on the reference pin, eliminating need for external protection diodes. The SPI-compatible serial interface supports 1.8 V/2.5 V/3.3 V/5 V logic via separate VIO supply and enables daisy-chain or CS-mode configurations with programmable status bits and busy indicators.

Key Specifications

Pinout & Package

AD4000BRMZ is available in a 10-lead MSOP package (3 mm × 4.90 mm) with exposed pad (not electrically connected). Pin functions are validated per Analog Devices Rev. F datasheet Figure 2 and Table 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision SAR ADC applications.

Compared with AD4004BRMZ and AD7606C-16, the AD4000BRMZ uniquely balances 2 MSPS throughput, 16-bit precision, and ultra-low 1.8 V supply operation - making it the only option among the three capable of single-channel, high-speed, low-voltage, and low-latency acquisition without external support circuitry.

Availability

AD4000BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, and industrial process control requiring stable component supply, long-term lifecycle assurance, and guaranteed parametric performance across −40°C to +125°C.

Supply support for AD4000BRMZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision data conversion and signal conditioning solutions.

The AD4000BRMZ belongs to the AD4000 family of Easy Drive precision SAR ADCs, designed specifically to simplify high-speed analog front ends by reducing amplifier and filter design complexity while maintaining 16-bit accuracy and robustness in demanding environments.

FAQ

What is the maximum sampling rate supported by the AD4000BRMZ?

The AD4000BRMZ supports a maximum throughput rate of 2 MSPS when turbo mode is enabled and the SCK clock frequency is ≥70 MHz (VIO ≥ 2.7 V). At this rate, the conversion time is 290 ns typical, and the acquisition phase is 290 ns - enabling accurate capture of fast-changing signals without pipeline delay. This specification is guaranteed across the full −40°C to +125°C operating temperature range.

Does the AD4000BRMZ require a negative supply voltage for its analog inputs?

No, the AD4000BRMZ does not require a negative supply. It uses input span compression to allow full-scale code utilization with a single 1.8 V positive supply while accepting pseudo-differential inputs from −0.1 V to VREF + 0.1 V relative to GND. This eliminates the need for dual-supply op amps in the signal chain and simplifies power architecture in battery-powered and isolated systems.

How does the high-Z mode affect the AD4000BRMZ's analog input behavior?

When enabled via SPI register configuration, high-Z mode reduces the AD4000BRMZ's analog input charging current to 1 µA (vs. 0.3 nA in acquisition phase), significantly relaxing amplifier settling requirements and enabling use of lower-bandwidth, lower-power drivers. It improves distortion performance up to 100 kHz but should be disabled for multiplexed or >100 kHz input signals to maintain acquisition fidelity.

Can the AD4000BRMZ interface directly with a 3.3 V microcontroller SPI port?

Yes, the AD4000BRMZ supports direct interfacing with 3.3 V microcontrollers via its independent VIO supply pin. When VIO = 3.3 V, the digital inputs accept VIH ≥ 2.31 V and VIL ≤ 0.66 V, and the SDO output drives VOH ≥ 3.0 V and VOL ≤ 0.4 V - fully compliant with standard 3.3 V CMOS logic levels without level-shifting circuitry.

What package options are available for the AD4000BRMZ?

The AD4000BRMZ is offered exclusively in a 10-lead MSOP package (RM-10), measuring 3 mm × 4.90 mm with a standard footprint. This differs from the AD4000BCPZ, which uses a 10-lead LFCSP (CP-10-9). Both packages share identical pinout and electrical specifications, but the MSOP variant is optimized for reflow compatibility and manual inspection in medium-volume production.