AD4021BRMZ

AD4021BRMZ is a high accuracy, high speed, low power, 20-bit, easy drive, precision successive approximation register (SAR) analogue-to-digital converter (ADC) that operates from a single power supply, VDD. The reference voltage, VREF, is applied externally and can be set independent of the supply voltage. The device power scales linearly with throughput. Easy drive features reduce both signal chain complexity and power consumption while enabling higher channel density. The reduced input current, particularly in high-Z mode, coupled with a long signal acquisition phase, eliminates the need for a dedicated ADC driver. Easy drive broadens the range of companion circuitry that is capable of driving these ADCs. It is used in applications such as automated test equipment, machine automation, medical equipment, battery-powered equipment, precision data acquisition systems, instrumentation and control systems.

• Easy drive, greatly reduced input kickback, input current reduced to 0.5μA/MSPS
• First conversion accurate, no latency or pipeline delay
• Input span compression for single-supply operation, fast conversion allows low SPI clock rates
• Input overvoltage clamp protection sinks upto 50mA, VREF voltage range from 2.4V to 5.1V
• SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
• Integral nonlinearity error is +3.1ppm maximum at (VDD = 1.71V to 1.89V)
• Conversion time is 320ns typical, acquisition phase is 770ns minimum
• Throughput rate is 1MSPS maximum at (VDD = 1.71V to 1.89V)
• 10MHz typical -3dB bandwidth at (VDD = 1.71V to 1.89V)
• Operating temperature range from -40°C to +125°C, 10-lead MSOP package

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