Datasheet AD7853, AD7853L (Analog Devices)

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3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs AD7853/AD7853L* FEATURES FUNCTIONAL BLOCK DIAGRAM Specified for VDD of 3 V to 5.5 V AVDD AGND AGND Read-Only Operation AD7853–200 kSPS; AD7853L–100 kSPS DV AIN(+) DD System and Self-Calibration with Autocalibration on AD7853/AD7853L T/H Power-Up AIN(–) DGND Low Power: 2.5V AD7853: 12 mW (VDD = 3 V) REFERENCE AD7853L: 4.5 mW (VDD = 3 V) COMP Automatic Power Down After Conversion (25
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W) REF BUF IN/ Flexible Serial Interface: REFOUT 8051/SPI™/QSPI™/
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P Compatible CREF1 24-Lead DIP, SOIC and SSOP Packages AMODE CHARGE REDISTRIBUTION APPLICATIONS DAC CLKIN Battery-Powered Systems (Personal Digital Assistants, CREF2 SAR + ADC CONVST Medical Instruments, Mobile Communications) CONTROL Pen Computers CALIBRATION BUSY CAL MEMORY Instrumentation and Control Systems AND CONTROLLER SLEEP High Speed Modems SERIAL INTERFACE / CONTROL REGISTER GENERAL DESCRIPTION
The AD7853/AD7853L are high speed, low power, 12-bit
SM1 SM2 SYNC DIN DOUT SCLK POLARITY
ADCs that operate from a single 3 V or 5 V power supply, the AD7853 being optimized for speed and the AD7853L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC
PRODUCT HIGHLIGHTS
contains self-calibration and system-calibration options to en- 1. Specified for 3 V and 5 V supplies. sure accurate operation over time and temperature and have a 2. Automatic calibration on power-up. number of power-down options for low power applications. 3. Flexible power management options including automatic The part powers up with a set of default conditions and can power-down after conversion. operate as a read only ADC. 4. Operates with reference voltages from 1.2 V to VDD. The AD7853 is capable of 200 kHz throughput rate while the AD7853L is capable of 100 kHz throughput rate. The input 5. Analog input ranges from 0 V to VDD. track-and-hold acquires a signal in 500 ns and features a pseudo- 6. Self- and system calibration. differential sampling scheme. The AD7853/AD7853L voltage 7. Versatile serial I/O port (SPI/QSPI/8051/µP). range is 0 to VREF with both straight binary and twos comple- ment output coding. Input signal range is to the supply, and the 8. Lower power version AD7853L. part is capable of converting full power signals to 100 kHz. CMOS construction ensures low power dissipation of typically 4.5 mW for normal operation and 1.15 mW in power-down mode, with a throughput rate of 10 kSPS (VDD = 3 V). The part is available in 24-lead, 0.3 inch wide dual-in-line package (DIP), 24-lead small outline (SOIC) and 24-lead small shrink outline (SSOP) packages. *Patent pending. SPI and QSPI are trademarks of Motorola, Incorporated. REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties
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