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ADS1248IPWR Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1248IPWR Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 60 page  ELECTRICAL CHARACTERISTICS (V )(Gain) IN 2 AVSS 0.1V + + AVDD 0.1V - - (V )(Gain) IN 2 ADS1246 ADS1247 ADS1248 www.ti.com .................................................................................................................................................. SBAS426C – AUGUST 2008 – REVISED AUGUST 2009 Minimum/maximum specifications apply from –40°C to +105°C. Typical specifications are at +25°C. All specifications at AVDD = +5V, DVDD = +3.3V, AVSS = 0V, VREF = +2.048V, and oscillator frequency = 4.096MHz, unless otherwise noted. ADS1246, ADS1247, ADS1248 PARAMETER CONDITIONS MIN TYP MAX UNIT ANALOG INPUTS Full-scale input voltage ±VREF/PGA V (VIN = ADCINP – ADCINN) Common-mode input range V Differential input current 100 pA PGA gain settings 1, 2, 4, 8, 16, 32, 64, 128 Burnout current source 0.5, 2, or 10 µA Bias voltage (AVDD + AVSS)/2 V Bias voltage output impedance 400 Ω SYSTEM PERFORMANCE Resolution No missing codes 24 Bits Data rate 5, 10, 20, 40, 80, 160, 320, 640, 1000, 2000 SPS Integral nonlinearity (INL) Differential input, end point fit, PGA = 1 6 15 ppm Offset error After calibration –15 15 µV Offset drift See Figure 8 to Figure 11 nV/°C T = +25°C, all PGAs, Gain error –0.02 ±0.005 0.02 % data rate = 40, 80, or 160SPS Gain drift See Figure 12 to Figure 15 ppm/°C ADC conversion time Single-cycle settling Noise See Table 5 to Table 8 Normal-mode rejection See Table 12 At dc, PGA = 1 80 90 dB Common-mode rejection At dc, PGA = 32 90 125 dB Power-supply rejection AVDD, DVDD at dc 100 135 dB VOLTAGE REFERENCE INPUT Voltage reference input 0.5 (AVDD – AVSS) – 1 V (VREF = VREFP – VREFN) Negative reference input (REFN) AVSS – 0.1 REFP – 0.5 V Positive reference input (REFP) REFN + 0.5 AVDD + 0.1 V Reference input current 30 nA ON-CHIP VOLTAGE REFERENCE Output voltage 2.038 2.048 2.058 V Output current(1) ±10 mA Load regulation 50 µV/mA TA = +25°C to +105°C 2 10 ppm/°C Drift(2) TA = –40°C to +105°C 6 15 ppm/°C Startup time See Table 13 µs (1) Do not exceed this loading on the internal voltage reference. (2) Specified by the combination of design and final production test. Copyright © 2008–2009, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS1246 ADS1247 ADS1248 |
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