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ADS8422 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS8422 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 29 page www.ti.com SPECIFICATIONS ADS8422 SLAS512B – JUNE 2006 – REVISED DECEMBER 2006 T A = –40°C to 85°C, +VA = 5 V, +VAREG = 5 V to 3 V, +VBD = 5 V to 2.7 V, fSAMPLE = 4 MSPS, Vref = 4.096 V (measured with internal reference buffer) (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Full-scale input voltage(1) +IN – (–IN) –Vref Vref V +IN –0.2 Vref + 0.2 Absolute input voltage V –IN –0.2 Vref + 0.2 Common-mode input range (Vref)/2 – 0.2 (Vref)/2 (Vref)/2 + 0.2 V Input capacitance 30 pF Input leakage current 1 nA SYSTEM PERFORMANCE Resolution 16 Bits ADS8422I 15 No missing codes Bits ADS8422IB 16 ADS8422I –6 ±2 6 LSB Integral linearity (2)(3) (16 bit)(2) ADS8422IB –2 ±1 2 ADS8422I –2 ±0.7 2 LSB Differential linearity (16 bit) ADS8422IB –1 ±0.7 1.5 Offset error –0.5 ±0.25 0.5 mV Offset error drift ±0.2 ppm/ °C Gain error(4)(5) Vref = 4.096 V –0.1 ±0.05 0.1 %FS Gain error drift Vref = 4.096 V ±2 ppm/ °C At dc 81 Common-mode rejection ratio dB At code 0000h with [+IN + (–IN)]/2 = 78 512 mVpp at 500 kHz, Noise At 0000h output code 40 µV RMS Power supply rejection ratio At 8000h output code 78 dB SAMPLING DYNAMICS Conversion time 0.180 µs Acquisition time 0.070 µs Throughput rate 4 MHz Aperture delay 3 ns Aperture jitter 7 ps RMS Step response 70 ns Overvoltage recovery 140 ns (1) Ideal input span, does not include gain or offset error. (2) LSB means least significant bit and is equal to 2VREF/65536. (3) This is endpoint INL, not best fit. (4) Measured relative to an ideal full-scale input [+IN – (–IN)] of 8.192 V. (5) This specification does not include the internal reference voltage error and drift. 3 Submit Documentation Feedback |
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