Datasheet Analog Devices AD7621ACPZ
16-Bit, 2 LSB INL, 3 MSPS PulSAR ADC
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16-Bit, 2 LSB INL, 3 MSPS PulSAR® ADC AD7621
Throughput 3 MSPS (wideband warp and warp mode) 2 MSPS (normal mode) 1.25 MSPS (impulse mode) 2.048 V internal reference Differential input range: ±VREF (VREF up to 2.5 V) INL: ±2 LSB maximum, ±1 LSB typical 16-bit resolution with no missing codes SINAD: 89 dB typical @ 100 kHz THD: -101 dB typical @ 100 kHz No pipeline delay (SAR architecture) Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface SPI®-/QSPITM-/MICROWIRETM-/DSP-compatible 2.5 V single-supply operation Power dissipation: 65 mW typical @ 3 MSPS 48-lead LQFP and 48-lead LFCSP_VQ packages Speed upgrade of the AD7677
AGND AVDD REF REF AMP IN+ IN SWITCHED CAP DAC PARALLEL INTERFACE PDREF PDBUF PD RESET CONTROL LOGIC AND CALIBRATION CIRCUITRY CLOCK SERIAL PORT FUNCTIONAL BLOCK DIAGRAM
TEMP REFBUFIN REF REFGND DVDD DGND AD7621 OVDD OGND 16 D[15:0] SER/PAR BUSY RD CS OB/2C BYTESWAP
04565-001 WARP IMPULSE CNVST Figure 1. Table 1. PulSAR Selection
Type/kSPS Pseudo Differential True Bipolar True Differential 18-Bit Multichannel/ Simultaneous 100 to 250 AD7651 AD7660/61 AD7663 AD7675 AD7678 500 to 570 AD7650/52 AD7664/66 AD7665 AD7676 AD7679 AD7654 800 to 1000 AD7653 AD7667 AD7671 AD7677 AD7674 AD7655 >1000 APPLICATIONS
Medical instruments High speed data acquisition Digital signal processing Communications Instrumentation Spectrum analysis ATE AD7621 AD7641 GENERAL DESCRIPTION
The AD7621 is a 16-bit, 3 MSPS, charge redistribution SAR, fully differential analog-to-digital converter (ADC) that operates from a single 2.5 V power supply. It contains a high speed 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports. It features two very high sampling rate modes (wideband warp and warp), a fast mode (normal) for asynchronous rate applications, and a reduced power mode (impulse) for low power applications where the power is scaled with the throughput. Operation is specified from -40°C to +85°C. PRODUCT HIGHLIGHTS 1. 2. 3. 4. Fast Throughput. The AD7621 is a 3 MSPS, charge redistribution, 16-bit SAR ADC. Superior Linearity. The AD7621 has no missing 16-bit code. Internal Reference. The AD7621 has a 2.048 V internal reference with a typical drift of ±7 ppm/°C. Single-Supply Operation. The AD7621 operates from a 2.5 V single supply and typically dissipates 65 mW. In impulse mode, its power dissipation decreases with the throughput. Serial or Parallel Interface. Versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangem ...
Docket:16-Bit, 2 LSB INL, 3 MSPS PulSAR® ADC AD7621
Throughput 3 MSPS (wideband warp and warp mode) 2 MSPS (normal mode) 1.25 MSPS (impulse mode) 2.048 V internal reference Differential input range: ±VREF (VREF up to 2.5 V) INL: ±2 LSB maximum, ±1 LSB typical 16-bit resolution with no missing codes SINAD: 89 dB typical @ 100 kHz THD: -101 dB typical @ 100 kHz ...