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ADS1271IPWRG4 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1271IPWRG4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 38 page ADS1271 SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007 www.ti.com 4 ELECTRICAL CHARACTERISTICS (continued) All specifications at TA = −40°C to +105°C, AVDD = +5V, DVDD = +1.8V, fCLK = 27MHz, VREFP = 2.5V, and VREFN = 0V, unless otherwise noted. Specified values for ADS1271 and ADS1271B (high-grade version) are the same, except where shown in BOLDFACE type. ADS1271B ADS1271 PARAMETER UNITS MAX TYP MIN MAX TYP MIN TEST CONDITIONS Voltage Reference Inputs Reference input voltage (VREF) VREF = VREFP – VREFN 2.0 2.5 2.65 0.5 2.5 2.65 V Negative reference input (VREFN) AGND − 0.1 VREFP − 2.0 AGND − 0.1 VREFP − 0.5 V Positive reference input (VREFP) VREFN + 2.0 AVDD − 0.5 VREFN + 0.5 AVDD + 0.1 V Reference High-Speed mode 4.2 4.2 k Ω Reference Input impedance High-Resolution mode 4.2 4.2 k Ω Input impedance Low-Power mode 8.4 8.4 k Ω Digital Input/Output VIH 0.7 DVDD DVDD 0.7 DVDD DVDD V VIL DGND 0.3 DVDD DGND 0.3 DVDD V VOH IOH = 5mA 0.8 DVDD DVDD 0.8 DVDD DVDD V VOL IOL = 5mA DGND 0.2 DVDD DGND 0.2 DVDD V Input leakage(4) 0 < VIN DIGITAL < DVDD ±10 ±10 µA Master clock rate (fCLK) 0.1 27 0.1 27 MHz SPI format 24 fDATA fCLK 24 fDATA fCLK MHz Serial clock rate (f )(5) High-Speed mode 64 fDATA 64 fDATA 64 fDATA 64 fDATA MHz Serial clock rate (fSCLK)(5) Frame-Sync format High-Resolution mode 128 fDATA 128 fDATA 128 fDATA 128 fDATA MHz SCLK Frame-Sync format Low-Power mode 64 fDATA 64 fDATA 64 fDATA 64 fDATA MHz Power Supply AVDD 4.75 5 5.25 4.75 5 5.25 V DVDD 1.65 3.6 1.65 3.6 V High-Speed mode 17 25 17 25 mA High-Resolution mode 17 25 17 25 mA AVDD current Low-Power mode 6.3 9.5 6.3 9.5 mA AVDD current Power-Down mode T > 85 °C 1 70 1 70 µA Power-Down mode T ≤ 85°C 1 10 1 10 µA High-Speed mode 3.5 6 3.5 6 mA High-Resolution mode 2.5 5 2.5 5 mA DVDD current Low-Power mode 1.8 3.5 1.8 3.5 mA DVDD current Power-Down mode T > 85 °C, DVDD = 3.3V 1 70 1 70 µA Power-Down mode T ≤ 85°C, DVDD = 3.3V 1 20 1 20 µA Power High-Speed mode 92 136 92 136 mW Power dissipation High-Resolution mode 90 134 90 134 mW dissipation Low-Power mode 35 54 35 54 mW Temperature Range Specified −40 +105 −40 +105 _C Operating −40 +105 −40 +105 _C Storage −60 +150 −60 +150 _C (1) FSR = full-scale range = 2VREF. (2) Minimum SNR is ensured by the limit of the DC noise specification. (3) THD includes the first nine harmonics of the input signal. (4) MODE and FORMAT pins excluded. (5) See the text for more details on SCLK. |
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