AD4004BRMZ

Analog To Digital Converters (ADC) Overview

The AD4004BRMZ is a 16-bit, 1 MSPS precision successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from a single 1.8 V analog supply and supports logic interfaces ranging from 1.71 V to 5.5 V. The device features a pseudo-differential input architecture with an external reference voltage range of 2.4 V to 5.1 V. Key performance metrics include a maximum integral nonlinearity (INL) of ±1.0 LSB, a signal-to-noise ratio (SNR) of 93 dB at a 1 kHz input frequency, and a spurious-free dynamic range (SFDR) of 112 dB. Power consumption scales linearly with throughput, reaching approximately 9.9 mW at 1 MSPS.

Analog To Digital Converters (ADC) Feature Summary

• Easy Drive capabilities including High-Z mode and extended acquisition phase reduce signal chain settling requirements.
• Input overvoltage protection clamp sinks up to 50 mA, eliminating the need for external protection diodes.
• First conversion accurate with no latency or pipeline delay, suitable for multiplexed applications.
• SPI/QSPI/MICROWIRE/DSP-compatible serial interface supporting multiple logic voltage levels.

Analog To Digital Converters (ADC) Applications

• Automated test equipment
• Machine automation
• Medical equipment
• Battery-powered equipment
• Precision data acquisition systems

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and reel specifications. Ensure that the digital interface voltage (VIO) matches the host system logic levels, as the AD4004 supports a wide range from 1.71 V to 5.5 V. Confirm thermal management requirements based on the selected operating throughput and ambient temperature conditions.

Analog To Digital Converters (ADC) Selection Notes

Select the AD4004BRMZ when a 1 MSPS sampling rate is required alongside 16-bit resolution. Compare against the AD4000 for higher speed (2 MSPS) or the AD4008 for lower power consumption at reduced speeds. Consider the Easy Drive features if the driving amplifier has limited bandwidth or high output impedance. Verify that the application can accommodate the pseudo-differential input configuration.

Analog To Digital Converters (ADC) Part Context

The AD4004 is part of the AD4000/AD4004/AD4008 family of 16-bit SAR ADCs. While sharing the same core architecture and pinout, the AD4004 is specifically optimized for a 1 MSPS throughput rate, distinguishing it from the 2 MSPS AD4000 and the 500 kSPS AD4008. All variants in this series utilize the MSOP-10 or LFCSP packages and share similar electrical characteristics regarding linearity and noise performance.

Analog To Digital Converters (ADC) Replacement Considerations

The AD4000BRMZ and AD4008BRMZ are direct pin-compatible alternatives within the same datasheet. The AD4000 offers higher throughput (2 MSPS), while the AD4008 provides lower power consumption at 500 kSPS. No other cross-model replacements are documented in the provided source material.

Analog To Digital Converters (ADC) FAQ

Does the AD4004 have pipeline delay?

No, the AD4004 exhibits no pipeline delay or latency; conversion results are available immediately after the completed conversion.

What is the function of the IN− pin?

The IN− pin serves as the analog ground sense for the pseudo-differential input. The device samples the voltage differential between IN+ and IN−.

How does High-Z mode affect input current?

When enabled via the SPI interface, High-Z mode significantly reduces the input charging current at low signal frequencies and improves distortion up to 100 kHz.