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ADS1251 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1251 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 23 page  ADS1251 3 SBAS184D www.ti.com ELECTRICAL CHARACTERISTICS (Cont.) All specifications at TMIN to TMAX, VDD = +5V, CLK = 8MHz, and VREF = 4.096, unless otherwise specified. ADS1251U PARAMETER CONDITIONS MIN TYP MAX UNITS VOLTAGE REFERENCE VREF 0.5 4.096 VDD V Load Current 32 µA DIGITAL INPUT/OUTPUT Logic Family CMOS Logic Level: VIH +4.0 +VDD + 0.3 V VIL –0.3 +0.8 V VOH IOH = –500µA +4.5 V VOL IOL = 500µA 0.4 V Input (SCLK, CLK) Hysteresis 0.6 V Data Format Offset Binary Two’s Complement POWER-SUPPLY REQUIREMENTS Operation +4.75 +5 +5.25 VDC Quiescent Current VDD = +5VDC 1.5 2 mA Operating Power 7.5 10 mW Power-Down Current 0.4 1 µA TEMPERATURE RANGE Operating –40 +85 °C Storage –60 +100 °C PIN CONFIGURATION Top View SO PIN DESCRIPTIONS PIN NAME PIN DESCRIPTION 1+VIN Analog Input: Positive Input of the Differen- tial Analog Input 2–VIN Analog Input: Negative Input of the Differ- ential Analog Input. 3+VDD Input: Power-Supply Voltage, +5V 4 CLK Digital Input: Device System Clock. The system clock is in the form of a CMOS- compatible clock. This is a Schmitt-Trigger input. 5 DOUT/DRDY Digital Output: Serial Data Output/Data Ready. This output indicates that a new output word is available from the ADS1251 data output register. The serial data is clocked out of the serial data output shift register using SCLK. 6 SCLK Digital Input: Serial Clock. The serial clock is in the form of a CMOS-compatible clock. The serial clock operates independently from the system clock, therefore, it is pos- sible to run SCLK at a higher frequency than CLK. The normal state of SCLK is LOW. Holding SCLK HIGH will either ini- tiate a modulator reset for synchronizing multiple converters or enter power-down mode. This is a Schmitt-Trigger input. 7 GND Input: Ground 8VREF Analog Input: Reference Voltage Input +V IN ADS1251U GND –V IN V REF +V DD SCLK DOUT/DRDY CLK 1 2 3 4 8 7 6 5 |
Similar Part No. - ADS1251_15 |
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Similar Description - ADS1251_15 |
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