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ADS1286 Dataheets PDF



Part Number ADS1286
Manufacturers Burr-Brown Corporation
Logo Burr-Brown Corporation
Description 12-Bit Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
Datasheet ADS1286 DatasheetADS1286 Datasheet (PDF)

® ADS 128 6 ADS1286 ADS 128 6 12-Bit Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES q q q q SERIAL INTERFACE GUARANTEED NO MISSING CODES 20kHz SAMPLING RATE LOW SUPPLY CURRENT: 250µA DESCRIPTION The ADS1286 is a 12-bit, 20kHz analog-to-digital converter with a differential input and sample and hold amplifier and consumes only 250µA of supply current. The ADS1286 offers an SPI and SSI compatible serial interface for communications over a two or three wire interface. The combin.

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® ADS 128 6 ADS1286 ADS 128 6 12-Bit Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER FEATURES q q q q SERIAL INTERFACE GUARANTEED NO MISSING CODES 20kHz SAMPLING RATE LOW SUPPLY CURRENT: 250µA DESCRIPTION The ADS1286 is a 12-bit, 20kHz analog-to-digital converter with a differential input and sample and hold amplifier and consumes only 250µA of supply current. The ADS1286 offers an SPI and SSI compatible serial interface for communications over a two or three wire interface. The combination of a serial two wire interface and micropower consumption makes the ADS1286 ideal for remote applications and for those requiring isolation. The ADS1286 is available in a 8-pin plastic mini DIP and a 8-lead SOIC. APPLICATIONS q q q q REMOTE DATA ACQUISITION ISOLATED DATA ACQUISITION TRANSDUCER INTERFACE BATTERY OPERATED SYSTEMS SAR Control VREF DOUT +In CDAC –In S/H Amp Comparator Serial Interface DCLOCK CS/SHDN International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 © 1996 Burr-Brown Corporation PDS-1335B Printed in U.S.A. October, 1998 SPECIFICATIONS At TA = TMIN to TMAX, +VCC = +5V, VREF = +5V, fSAMPLE = 12.5kHz, , fCLK = 16 • fSAMPLE, unless otherwise specified. ADS1286, ADS1286A PARAMETER ANALOG INPUT Full-Scale Input Range Absolute Input Voltage Capacitance Leakage Current SYSTEM PERFORMANCE Resolution No Missing Codes Integral Linearity Differential Linearity Offset Error Gain Error Noise Power Supply Rejection SAMPLING DYNAMICS Conversion Time Acquisition Time Small Signal Bandwidth DYNAMIC CHARACTERISTICS Total Harmonic Distortion SINAD Spurious Free Dynamic Range REFERENCE INPUT REF Input Range Input Resistance Current Drain VIN = VIN = VIN = VIN = 5.0Vp-p 5.0Vp-p 5.0Vp-p 5.0Vp-p at at at at 1kHz 5kHz 1kHz 1kHz 1.25 CS = VCC CS = GND, fCLK = 0Hz CS = VCC tCYC ≥ 640µs, fCLK ≤ 25kHz tCYC = 80µs, fCLK = 200kHz CONDITIONS MIN TYP MAX ADS1286K, ADS1286B MIN T T T T T T T ±1 ±0.5 0.75 ±2 50 82 ±2 ±1.0 ±3 ±8 T T T T T T T ±0.75 T T T ±0.5 ±0.25 T T T T ±1 ±0.75 T T TYP MAX T T T ADS1286C, ADS1286L MIN T T T T T T TYP MAX T T T UNITS +In – (–In) +In –In 0 –0.2 –0.2 25 ±1 12 12 VREF VCC +0.2 +0.2 V V V pF µA Bits Bits LSB LSB LSB LSB µVrms dB Clk Cycles Clk Cycles kHz dB dB dB dB 12 1.5 500 –85 –83 72 90 2.5 5000 5000 0.01 2.4 2.4 CMOS IIH = +5µA IIL = +5µA IOH = 250µA IOL = 250µA 3 0.0 3 0.0 Straight Binary +VCC 0.8 +VCC 0.4 T T T T T VCC+0.05V T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T T 2.5 20 20 T T T T T T V MΩ MΩ µA µA µA DIGITAL INPUT/OUTPUT Logic Family Logic Levels: VIH VIL VOH VOL Data Format T T T T V V V V POWER SUPPLY REQUIREMENTS Power Supply Voltage VCC Quiescent Current, VANA tCYC ≥ 640µS, fCLK ≤ 25kHz tCYC = 90µS, fCLK = 200kHz Power Down CS = VCC TEMPERATURE RANGE Specified Performance ADS1286, K, L ADS1286A, B, C +4.50 5 200 250 5.25 400 500 3 +70 +85 T T T T T T T T T T T T T T T T T T T T V µA µA µA °C °C 0 –40 T T T T T Specifications same as grade to the left. TIMING CHARACTERISTICS fCLK = 200kHz, TA = TMIN to TMAX. SYMBOL tSMPL tSMPL (MAX) tCONV tdDO tdis ten thDO tf tr tCSD tSUCS PARAMETER Analog Input Sample Time Maximum Sampling Frequency Conversion Time Delay TIme, DCLOCK↓ to DOUT Data Valid Delay TIme, CS↑ to DOUT Hi-Z Delay TIme, DCLOCK↓ to DOUT Enable Output Data Remains Valid After DCLOCK↓ DOUT Fall Time DOUT Rise Time Delay Time, CS↓ to DCLOCK↓ Delay Time, CS↓ to DCLOCK↑ ® CONDITIONS See Operating Sequence ADS1286 See Operating Sequence See Test Circuits See Test Circuits See Test Circuits CLOAD = 100pF See Test Circuits See Test Circuits See Operating Sequence See Operating Sequence MIN 1.5 TYP MAX 2.0 20 UNITS Clk Cycles kHz Clk Cycles ns ns ns ns ns ns ns ns 15 12 85 25 50 30 70 60 150 50 100 100 100 0 30 ADS1286 2 ABSOLUTE MAXIMUM RATINGS(1) +VCC ..................................................................................................... +6V Analog Input ....................................................... –0.3V to (+VCC + 300mV) Logic Input ......................................................... –0.3V to (+VCC + 300mV) Case Temperature ......................................................................... +100°C Junction Temperature .................................................................... +150°C Storage Temperature ..................................................................... +125°C External Reference Voltage .............................................................. +5.5V NOTE: (1) Stresses above these ratings may permanently damage the device. ELECTROSTATIC DISCHARGE SENSITIVITY Electrostatic discharge can cause damage ranging from performance degradation to complete device failur.


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