Analog Devices Inc. AD4000BCPZ-RL7

Overview

AD4000BCPZ-RL7 from Analog Devices is a 16-bit, 2 MSPS precision pseudo-differential successive approximation register (SAR) ADC with Easy Drive architecture. It operates from a single 1.8 V supply, supports 2.4 V to 5.1 V external reference voltage, delivers ±1.0 LSB INL max and 93 dB SNR at 1 kHz, and is designed for high-accuracy data acquisition in battery-powered instrumentation.

For engineers reviewing the AD4000BCPZ-RL7 datasheet, AD4000BCPZ-RL7 pinout, AD4000BCPZ-RL7 application, or AD4000BCPZ-RL7 equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and timing behavior across −40°C to +125°C, and real-world alternative selection guidance for precision SAR ADC replacement scenarios.

Technical Context

The AD4000BCPZ-RL7 implements a true SAR architecture with no pipeline latency-first conversion is accurate and deterministic. Its Easy Drive features include high-Z input mode (reducing driver settling burden) and extended acquisition phase (290 ns at 2 MSPS), enabling use with low-bandwidth, low-power amplifiers and relaxed RC filter design.

It integrates an input overvoltage clamp (50 mA sink capability), span compression for single-supply amplifier compatibility, and SPI/QSPI/MICROWIRE-compatible serial interface with independent 1.71 V–5.5 V VIO supply-supporting mixed-voltage digital hosts without level shifters.

Key Specifications

Pinout & Package

AD4000BCPZ-RL7 is housed in a 10-lead 3 mm × 3 mm LFCSP package with exposed pad (CP-10-9). Thermal resistance θ_JA = 114°C/W, θ_JC = 33°C/W under JEDEC 2S2P PCB conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD4004BCPZ-RL7, the AD4000BCPZ-RL7 delivers 2× throughput with identical pinout and feature set-ideal for upgrade paths. Versus ADS8860IDRCT, AD4000BCPZ-RL7 offers superior robustness (50 mA clamp), lower power at speed, and flexible dual-supply interface, but requires careful 1.8 V analog rail design.

Availability

AD4000BCPZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, and precision industrial control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD4000BCPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD4000/AD4004/AD4008 family was engineered to solve precision data acquisition challenges in space-, power-, and thermal-constrained systems-delivering 16-bit accuracy at up to 2 MSPS with minimal external components and robust input protection.

FAQ

What is the maximum achievable throughput for AD4000BCPZ-RL7, and what conditions are required?

The AD4000BCPZ-RL7 achieves its rated 2 MSPS maximum throughput only when turbo mode is enabled and the SCK clock frequency is ≥70 MHz (VIO ≥ 2.7 V). At lower SCK rates or in standard CS mode, throughput drops to 1.82 MSPS or less. The AD4000BCPZ-RL7's 290 ns acquisition phase and 270 ns conversion time are optimized for this regime-exceeding these limits degrades INL and SNR performance per Table 4 and Figure 23 of the Rev. F datasheet.

Does AD4000BCPZ-RL7 support true differential input, or is it pseudo-differential only?

The AD4000BCPZ-RL7 is strictly pseudo-differential: it accepts a single-ended signal referenced to IN−, which must be tied to analog ground or a remote sense point-not a true differential pair with complementary inputs. The input stage measures the voltage difference between IN+ and IN−, but IN− is not actively driven or inverted. This architecture simplifies driver design while retaining common-mode rejection benefits, as confirmed in the General Description and Pin Function Descriptions sections of the AD4000/AD4004/AD4008 datasheet Rev. F.

Can AD4000BCPZ-RL7 operate with a 2.5 V reference voltage, and how does that affect SNR?

Yes, AD4000BCPZ-RL7 supports VREF from 2.4 V to 5.1 V. At VREF = 2.5 V and fIN = 1 kHz, SNR is 85.5 dB (min) to 87.5 dB (typ), compared to 91–93 dB at 5 V-representing ~5.5 dB reduction due to lower full-scale signal swing and increased quantization noise contribution. THD remains −113 dB, confirming maintained linearity. This trade-off is documented in Table 1 AC Accuracy section and Figure 17 of the Rev. F datasheet.

What is the purpose of the exposed pad (EPAD) on AD4000BCPZ-RL7, and is it electrically connected?

The EPAD on AD4000BCPZ-RL7 is a thermal pad, not an electrical terminal. Per Table 7 Pin Function Descriptions and Ordering Guide, it must be soldered to the PCB ground plane to achieve specified θJA = 114°C/W thermal performance-but it is not required for functional operation or electrical specification compliance. Leaving it unconnected degrades thermal resistance by ~25%, potentially limiting sustained 2 MSPS operation in high-ambient environments.

How does high-Z mode affect the analog input behavior of AD4000BCPZ-RL7?

When enabled via SPI register write, high-Z mode reduces AD4000BCPZ-RL7's analog input charging current from 0.3 nA (acquisition phase) to 1 µA (dc input at 2 MSPS), significantly easing driver amplifier settling requirements. It improves THD up to 100 kHz but degrades transient response beyond that frequency-hence the datasheet recommends disabling it for multiplexed or >100 kHz applications. This behavior is characterized in Figures 6, 9, and 25 of Rev. F.