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AD7685BRMZRL7 Datasheet(PDF) 1 Page - Analog Devices |
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AD7685BRMZRL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 29 page 16-Bit, 250 kSPS PulSAR ADC in MSOP Data Sheet AD7685 FEATURES 16-bit resolution with no missing codes Throughput: 250 kSPS INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR) SINAD: 93.5 dB at 20 kHz THD: −110 dB at 20 kHz Pseudo differential analog input range 0 V to VREF with VREF up to VDD No pipeline delay Single-supply operation 2.3 V to 5.5 V with 1.8 V to 5 V logic interface Proprietary serial interface: SPI-/QSPI™-/MICROWIRE™-/DSP- compatible Daisy-chain multiple ADCs, BUSY indicator Power dissipation 1.4 µW at 2.5 V/100 SPS 1.35 mW at 2.5 V/100 kSPS, 4 mW at 5 V/100 kSPS Standby current: 1 nA 10-lead package: MSOP (MSOP-8 size) and 3 mm × 3 mm LFCSP (SOT-23 size) Pin-for-pin-compatible with 10-lead MSOP/PulSAR® ADCs APPLICATIONS Battery-powered equipment Medical instruments Mobile communications Personal digital assistants (PDAs) Data acquisition Instrumentation Process controls CODE 65536 0 16384 32768 49152 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 POSITIVE INL = +0.33LSB NEGATIVE INL = –0.50LSB Figure 1. Integral Nonlinearity vs. Code TYPICAL APPLICATION CIRCUIT AD7685 REF GND VDD IN+ IN– VIO SDI SCK SDO CNV 1.8V TO VDD 3- OR 4-WIRE INTERFACE (SPI, DAISY CHAIN, CS) 0.5V TO VDD 2.5V TO 5V 0 TO VREF Figure 2. Table 1. MSOP, LFCSP/SOT-23 14-/16-/18-Bit PulSAR ADC Type 100 kSPS 250 kSPS 400 kSPS to 500 kSPS 1000 kSPS ADC Driver 18-Bit True AD7691 AD7690 AD7982 ADA4941 Differential AD7982 ADA4841 16-Bit True AD7684 AD7687 AD7688 ADA4941 Differential AD7693 ADA4841 16-Bit Pseudo AD7680 AD7685 AD7686 AD7980 ADA4841 Differential AD7683 AD7694 14-Bit Pseudo AD7940 AD7942 AD7946 ADA4841 Differential GENERAL DESCRIPTION The AD76851 is a 16-bit, charge redistribution successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay, track-and-hold circuit. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Power dissipation scales linearly with throughput. The SPI-compatible serial interface also features the ability, using the SDI input, to daisy chain several ADCs on a single 3-wire bus or provides an optional BUSY indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using the separate supply VIO. The AD7685 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +85°C. 1 Protected by U.S. Patent 6,703,961. Rev. D Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2004–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
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