AD7661 Datasheet | Analog Devices

.. 16-Bit 100 k SPS Pul SAR® Unipolar ADC with Reference AD7661 Features 2.5 V internal reference: typical drift 3 ppm/°C Guaranteed max drift 15 ppm/°C Throughput: 100 k SPS INL: ±2.5 LSB max (±0.0038% of full scale) 16-bit resolution with no missing codes S/(N+D): 88 d B min @ 20 k Hz THD: - 96 d B max @ 20 k Hz 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 patible Single 5 V supply operation Power dissipation 16 m W typ, 160 µW @ 1 k SPS without REF 40 m W typ with REF 48-lead LQFP and 48-lead LFCSP packages Pin-to-pin patible with Pul SAR 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 OGND IN INGND PDREF PDBUF PD RESET OB/2C BYTESWAP CNVST Figure 1. Functional Block Diagram Table 1. Pul SAR Selection Type/k SPS Pseudo Differential True Bipolar True Differential 18-Bit Multichannel/ Simultaneous 100- 250 AD7651 AD7660/AD7661 AD7663 AD7675 AD7678 500- 570 AD7650/AD7652 AD7664/AD7666 AD7665 AD7676 AD7679 AD7654 AD7655 800- 1000 AD7653 AD7667 AD7671 AD7677 AD7674 APPLICATIONS Data acquisition Medical instruments Digital signal processing Spectrum analysis Instrumentation Battery-powered systems Process control PRODUCT HIGHLIGHTS 1. Fast Throughput. The AD7661 is a 100 k SPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. Superior INL. The AD7661 has a maximum integral nonlinearity of 2.5 LSB with no missing 16-bit codes. Internal Reference. The AD7661 has an internal reference with a typical temperature drift of 3 ppm/°C. Single-Supply Operation. The AD7661 operates from a single 5 V supply. Its power dissipation decreases with throughput. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is...