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ADS7945 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS7945 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 49 page ADS7945 ADS7946 SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS: ADS7946 (Single-Ended) (continued) Minimum/maximum specifications at TA = –40°C to +125°C, AVDD = 2.7 V to 5.25 V, DVDD = 1.65 V to AVDD, and fSAMPLE = 2 MSPS, unless otherwise noted. Typical specifications at TA = +25°C, AVDD = 5 V, DVDD = 1.8 V, and fSAMPLE = 2 MSPS. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS POWER-SUPPLY REQUIREMENTS AVDD 2.7 3.3 5.25 V DVDD 1.65 3.3 AVDD V AVDD = 3.3 V, fSAMPLE = 2 MSPS 3.5 4 mA IDYNAMIC AVDD = 5 V, fSAMPLE = 2 MSPS 4 5 mA AVDD supply current AVDD = 3.3 V, SCLK off 2.3 mA ISTATIC AVDD = 5 V, SCLK off 2.5 3 mA DVDD = 3.3 V, fSAMPLE = 2 MSPS, DVDD supply current(8) 750 µA SDO load 20 pF IPD-DYNAMIC SCLK = 40 MHz 550 µA Power-down state AVDD supply current IPD-STATIC SCLK off 2.5 µA Power-up time From power-down state using PDEN pin 1 µs TEMPERATURE RANGE Specified performance –40 +125 °C (8) DVDD consumes only dynamic current. IDVDD = CLOAD × DVDD × number of 0→1 transitions in SDO × fSAMPLE. This is a load-dependent current and there is no DVDD current when the output is not toggling. THERMAL INFORMATION ADS7945/6 THERMAL METRIC(1) RTE UNITS 16 PINS θJA Junction-to-ambient thermal resistance 54.3 θJCtop Junction-to-case (top) thermal resistance 53.7 θJB Junction-to-board thermal resistance 19.2 °C/W ψJT Junction-to-top characterization parameter 0.3 ψJB Junction-to-board characterization parameter 14.5 θJCbot Junction-to-case (bottom) thermal resistance 5.2 (1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): ADS7945 ADS7946 |
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