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ADS7924 Datasheet(PDF) 5 Page - Texas Instruments |
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ADS7924 Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 50 page  ADS7924 www.ti.com SBAS482B – JANUARY 2010 – REVISED SEPTEMBER 2015 6.5 Electrical Characteristics Minimum and maximum specifications are at TA = –40°C to 85°C, 1.65 V < DVDD < 5.5 V, and 2.2 V < AVDD < 5.5 V. Typical specifications are at TA = 25°C, AVDD = 5 V, and DVDD = 5 V, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Full-scale input span (CHX – AGND) 0 AVDD V Input capacitance(1) 4 10 pF ADC sampling capacitance 15 pF MUX resistance 60 Ω Input channel crosstalk 85 dB SYSTEM PERFORMANCE Resolution 12 Bits No missing codes 12 Bits Integral linearity –1.5 ±0.5 1.5 LSBs Differential linearity –1 ±0.6 1.5 LSBs Offset error –5 5 LSBs Offset error drift 0.01 LSB/°C Gain error –0.2% –0.01% 0.2% Gain error drift 0.6 ppm/°C Noise (rms) 0.125 LSB SAMPLING DYNAMICS Monitoring time/channel(2) 10 µs CLOCK Internal clock frequency variation ±20% DIGITAL INPUT/OUTPUT Logic family CMOS Logic level: VIH (SDA, SCL, A0, RESET) 0.8 DVDD DVDD + 0.3 V VIL (SDA, SCL, A0, RESET) DGND – 0.3 0.4 V Input current II VI = DVDD or DGND –10 10 μA IOH = 100 μA, INT pin 0.8 DVDD DVDD V VOH (PWRCON, INT) IOH = 100 µA, PWRCON pin 0.8 AVDD AVDD V VOL (PWRCON, INT, SDA) IOL = 100 μA DGND 0.4 V Low-level output current IOL SDA pin, VOL = 0.6 V 3 mA Load capacitance CB SDA pin 400 pF Data format Straight binary POWER-SUPPLY REQUIREMENTS Power-supply voltage: DVDD(3) 1.65 5.5 V AVDD 2.2 5.5 V IAVDD (4) tCYCLE = 2.5 ms, AVDD = 2.2 V 5 8 μA IPWRD, power-down current <1 μA TEMPERATURE RANGE Specified performance –40 85 °C (1) CH0 to CH3 input pin capacitance. (2) Rate at which channels can be scanned. This is the minimum acquisition time (6 µs) and conversion time (4 µs). (3) DVDD cannot exceed AVDD. (4) See Figure 3 and Figure 4 for more information. Copyright © 2010–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: ADS7924 |
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