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ADS1243SJD Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1243SJD Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 40 page  ADS1243-HT SBAS525 – DECEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS: VDD = 5 V (continued) All specifications VDD = 5 V, fMOD = 19.2 kHz, PGA = 1, Buffer ON, fDATA = 15 Hz, VREF ≡ (REF IN+) – (REF IN–) = 2.5 V, unless otherwise specified. TA = –55°C to 125°C TA = 210°C PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP MAX at DC, Power-Supply Rejection 80 95 79 95 dB dB = –20 log(ΔVOUT /VDD) (2) VOLTAGE REFERENCE INPUT Reference Input Range REF IN+, REF IN – 0 VDD 0 VDD V VREF ≡ (REF IN+) – (REF IN–), 0.1 2.5 2.6 0.1 2.5 2.6 V RANGE = 0 VREF RANGE = 1 0.1 VDD 0.1 VDD V Common-Mode Rejection at DC 120 98 dB Common-Mode Rejection fVREFCM = 60 Hz, fDATA = 15 Hz 120 95 dB Bias Current(3) VREF = 2.5 V 1.3 10 µA POWER-SUPPLY REQUIREMENTS Power-Supply Voltage VDD 4.75 5.25 4.75 5.25 V PGA = 1, Buffer OFF 240 375 250 480 µA PGA = 128, Buffer OFF 450 800 630 940 µA PGA = 1, Buffer ON 290 425 350 585 µA Current PGA = 128, Buffer ON 960 1400 1200 2050 µA SLEEP Mode 60 80 µA Read Data Continuous Mode 230 350 µA PDWN 0.5 10 nA Power Dissipation PGA = 1, Buffer OFF 1.2 1.9 1.3 2.52 mW (2) ΔVOUT is a change in digital result. (3) 12-pF switched capacitor at fSAMP clock frequency. ELECTRICAL CHARACTERISTICS: VDD = 3 V All specifications VDD = 3 V, fMOD = 19.2 kHz, PGA = 1, Buffer ON, fDATA = 15 Hz, VREF ≡ (REF IN+) – (REF IN–) = 1.25 V, unless otherwise specified. TA = –55°C to 125°C TA = 210°C PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP MAX ANALOG INPUT (AIN0 – AIN7) Buffer OFF GND – 0.1 VDD + 0.1 GND – 0.1 VDD + 0.1 V Analog Input Range GND + Buffer ON VDD – 1.5 GND + 0.05 VDD – 1.5 V 0.05 (In+) – (In–), See Block ±VREF/ ±VREF/ V Diagram, RANGE = 0 PGA PGA Full-Scale Input Voltage Range ±VREF/ ±VREF/ RANGE = 1 V (2 • PGA) (2 • PGA) Buffer OFF 5/PGA 10/PGA M Ω Input Impedance Buffer ON 5 8 G Ω fDATA = 3.75 Hz –3 dB 1.65 Hz Bandwidth fDATA = 7.50 Hz –3 dB 3.44 Hz fDATA = 15 Hz –3 dB 14.6 Hz Programmable Gain User-Selectable Gain Ranges 1 128 1 128 Amplifier Input Capacitance 9 25 pF Input Leakage Current Modulator OFF, T = 25 °C 5 6 pA Burnout Current Sources 2 µA OFFSET DAC ±VREF/ ±VREF/ RANGE = 0 V (2 ● PGA) (2 ● PGA) Offset DAC Range ±VREF/ ±VREF/ RANGE = 1 V (4 ● PGA) (4 ● PGA) 4 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): ADS1243-HT |
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