AD7661 PDF Datasheet
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Description
This is 16-Bit 1 MSPS SAR Unipolar ADC with Ref.
16-Bit 100 kSPS PulSAR® Unipolar ADC with Reference AD7661
FEATURES
2.5 V internal reference: typical drift 3 ppm, °C Guaranteed max drift 15 ppm, °C Throughput: 100 kSPS INL: ±2.5 LSB max (±0.0038% of full scale) 16-bit resolution with no missing codes S, (N+D): 88 dB min @ 20 kH- THD: 96 dB max @ 20 kH- Analog input voltage range: 0 V to 2.5 V Both AC and DC specifications No pipeline delay Parallel and serial 5 V, 3 V interface SPI®, QSPITM, MICROWIRETM, DSP compatible Single 5 V supply operation Power dissipation 16 mW typ, 160 W @ 1 kSPS without REF 40 mW typ with REF 48-lead LQFP and 48-lead LFCSP packages Pin-to-pin compatible with PulSAR ADCs
FUNCTIONAL BLOCK DIAGRAM
REFBUFIN REF REFGND AGND AVDD REF DVDD DGND OVDD SERIAL PORT SWITCHED CAP DAC PARALLEL INTERFACE CLOCK CONTROL LOGIC AND CALIBRATION CIRCUITRY 16 DATA[15:0] BUSY RD CS SER, PAR
03033-0-001
AD7661
OGND
IN INGND PDREF PDBUF PD RESET
OB, 2C BYTESWAP CNVST
Figure 1. Functional Block Diagram
Table 1.