SAR ADC - Analog Devices
Description
Data Sheet AD4000/AD4004/AD4008
16-Bit, 2 MSPS/1 MSPS/500 kSPS, Precision, Pseudo Differential, SAR ADCs
FEATURES
► Easy Drive expands signal chain flexibility ► High-Z mode significantly reduces signal chain settling requirements ► Fast conversion phase extends the ADC acquisition time ► Input overvoltage protection clamp sinks up to 50 mA
► High performance ► First conversion accurate, no latency or pipeline delay ► Guaranteed 16-bit, no missing codes ► Throughput: 2 MSPS/1 MSPS/500 kSPS options ► INL: ±1.
0 LSB maximum ► SNR: 93 dB at fIN = 1 kHz, VREF = 5 V ► THD: −115 dB at fIN = 1 kHz; −95 dB at fIN = 100 kHz ► Pseudo differential input range ► Flexible external reference voltage range (2.
4 V to 5.
1 V)
► Low power ► Single 1.
8 V supply operation with 1.
71 V to 5.
5 V logic interface ► 2.
5 mW at 500 kSPS (VDD only) ► 70 µW at 10 kSPS, 14 mW typical at 2 MSPS (total power)
► SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface ► 10-lead packages: 3 mm × 3 mm LFCSP, 3 mm × 4.
90 mm
MSOP ► Guaranteed operation: −40°C to +125°C
APPLICATIONS
► Automated test equipment ► Machine automation ► Medical equipment ► Battery-powered equipment ► Precision data acquisition systems ► Instrumentation and control systems
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION The AD4000/AD4004/AD4008 are high accuracy, high speed, low power, 16-bit, precision successive approximation register (SAR) analog-to-digital converters (ADCs).
These ADCs incorporate Easy Drive features, such as high-Z mode and an extended acquisition phase, which provide signal chain architectural flexibility by expanding the range of companion circuitry that can be paired with these ADCs.
Operating from a single power supply, VDD, these ADCs allow the reference voltage, VREF, to be applied externally and set independently of the supply voltage.
With fast device throughput up to 2 MSPS, the AD4000/AD4004/AD4008 can accurately capture high-frequency signals and implement oversampling techniques to alleviate the cha...
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