AD1876 Datasheet | Analog Devices

a Features Autocalibrating 0.002% THD 90 d B S/(N+D) 1 MHz Full Power Bandwidth On-Chip Sample & Hold Function 2؋ Oversampling for Audio Applications 16-Pin DIP Package Serial Twos plement Output Format Low Input Capacitance- typ 50 p F AGND Sense for Improved Noise Immunity VIN 10 AGND SENSE 9 INPUT BUFFERS 16-Bit 100 k SPS Sampling ADC AD1876 FUNCTIONAL BLOCK DIAGRAM A CHIP 16-BIT DAC CAL DAC LOGIC TIMING LEVEL TRANSLATORS P VREF 11 AGND 8 15 BUSY 14 D OUT CLK PRODUCT DESCRIPTION CAL 16 CLK SAMPLE 2 1 The AD1876 is a 16-bit serial output sampling A/D converter which uses a switched capacitor/charge redistribution architecture to achieve a 100 k SPS conversion rate (10 µs total conversion time). Overall performance is optimized by digitally correcting internal nonlinearities through on-chip autocalibration. The circuitry of the AD1876 is partitioned onto two monolithic chips, a digital control chip fabricated with Analog Devices’ DSP CMOS process and an analog ADC chip fabricated with the Bi MOS II process. Both chips are contained in a single package. The serial output interface requires an external clock and sample mand signal. The output data rate may be as high as 2.08 MHz, and is controlled by the external clock. The twos plement format of the output data is MSB first and is directly patible with the NPC SM5805 digital decimation filter used in consumer audio products. The AD1876 is also patible with a variety of DSP processors. The AD1876 is packaged in a space saving 16-pin plastic DIP and operates from +5 V and ± 12 V supplies; typical power consumption is 235 m W. The digital supply (VDD) is isolated from the linear supplies (VEE and VCC) for reduced digital crosstalk. Separate analog and digital grounds are also provided. MICROCODED CONTROLLER SAR ALU RAM D OUT D CHIP AD1876 REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its...