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GENERAL DESCRIPTION

The AD4030-24 is a 2 MSPS successive approximation register

(SAR) analog-to-digital converter (ADC) with Easy Drive?. With

a guaranteed maximum ±0.9 ppm integral nonlinearity (INL) and

no missing codes at 24-bits, the AD4030-24 achieves unparalleled

precision from ?40°C to +125°C. Figure 1 shows the functional

architecture of the AD4030-24.

A low-drift, internal precision reference buffer eases voltage

reference sharing with other system circuitry. The AD4030-24 offers

a typical dynamic range of 109 dB when using a 5 V reference.

The low noise floor enables signal chains requiring less gain and

lower power. A block averaging filter with programmable decimation

ratio can increase dynamic range up to 155.5 dB. The wide

differential input and common mode ranges allow inputs to use

the full ±VREF range without saturating, simplifying signal conditioning

requirements and system calibration. The improved settling of

the Easy Drive analog inputs broadens the selection of analog

front-end components compatible with the AD4030-24. Both singleended

and differential signals are supported.

The versatile Flexi-SPI serial peripheral interface (SPI) eases host

processor and ADC integration. A wide data clocking window,

multiple SDO lanes, and optional DDR data clocking can reduce

the serial clock to 10 MHz while operating at a sample rate of 2

MSPS. Echo clock mode and ADC host clock mode relax the timing

requirements and simplify the use of digital isolators.

The BGA package of the AD4030-24 integrates all critical power

supply and reference bypass capacitors, reducing the footprint and

system component count, and lessening sensitivity to board layout.

FEATURES

? High performance

? Throughput: 2 MSPS maximum

? INL: ±0.9 ppm maximum from ?40°C to +125°C

? SNR: 108.4 dB typical

? THD: ?127 dB typical

? NSD: ?169 dBFS/Hz typical

? Low power

? 30 mW at 2 MSPS

? 3 mW at 10 kSPS

? Easy Drive? features reduce system complexity

? Low 1.2 μA input current for dc inputs

? Wide input common-mode range: ?(1/128) × VREF to +(129/128) × VREF

? Flexible external reference voltage range: 4.096 V to 5 V

? Accurate integrated reference buffer with 2 μF bypass capacitor

? Programmable block averaging filter with up to 216 decimation

? Extended sample resolution to 30 bits

? Overrange and synchronization bits

? Flexi-SPI digital interface

? 1, 2, or 4 SDO lanes allows slower SCK

? Echo clock mode simplifies use of digital isolator

? Compatible with 1.2 V to 1.8 V logic

? 7 mm × 7 mm 64-Ball CSP_BGA package with internal supply and reference capacitors to help reduce system footprint

APPLICATIONS

? Automatic test equipment

? Digital control loops

? Medical instrumentation

? Seismology

? Semiconductor manufacturing

? Scientific instrumentation