Analog Devices AD4002 | Demoboard EVAL-AD4002FMCZ

Description

The AD4002 is a low noise, low power, high speed, 18-bit, 2 MSPS precision successive approximation register (SAR) analog-to-digital converter (ADC). It incorporates ease of use features that lower the signal chain power, reduce signal chain complexity, and enable higher channel density. The high-Z mode, coupled with a long acquisition phase, eliminates the need for a dedicated high power, high speed ADC driver, thus broadening the range of low power precision amplifiers that can drive this ADC directly while still achieving optimum performance. The input span compression feature enables the ADC driver amplifier and the ADC to operate off common supply rails without the need for a negative supply while preserving the full ADC code range. The low serial peripheral interface (SPI) clock rate requirement reduces the digital input/output power consumption, broadens processor options, and simplifies the task of sending data across digital isolation.

Features

• Throughput: 2 MSPS maximum
• INL: ±3.2 LSB maximum
• Guaranteed 18-bit no missing codes
• Low power
• 9.75 mW at 2 MSPS (VDD only)
• 70 μW at 10 kSPS, 14 mW at 2 MSPS (total)
• SNR: 95 dB typical at 1 kHz, 95 dB typical at 100 kHz
• THD: -125 dB typical at 1 kHz, −108 dB typical at 100 kHz
• Ease of use features reduce system power and complexity
• Input overvoltage clamp circuit
• Reduced nonlinear input charge kickback
• High-Z mode
• Long acquisition phase
• Input span compression
• Fast conversion time allows low SPI clock rates
• SPI-programmable modes, read/write capability, status word
• Pseudo differential (single-ended) analog input range: 0 V to VREF with VREF between 2.4 V to 5.1 V
• Single 1.8 V supply operation with 1.71 V to 5.5 V logic interface
• SAR architecture: no latency/pipeline delay
• Guaranteed operation: -40°C to 125°C
• Serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
• Ability to daisy-chain multiple ADCs and busy indicator
• 10-lead package: 3 mm × 3 mm LFCSP, 3 mm × 4.90 mm MSOP

Typical applications

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

More information

• Datasheet
• IC product information