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ADS7866IDBVT Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7866IDBVT Datasheet(HTML) 3 Page - Texas Instruments |
3 / 29 page www.ti.com SPECIFICATIONS, ADS7866 ADS7866 ADS7867 ADS7868 SLAS465 – JUNE 2005 At –40 °C to 85°C, f SAMPLE = 200 KSPS and fSCLK = 3.4 MHz if 1.6 V ≤ VDD ≤ 3.6 V; fSAMPLE = 100 KSPS and fSCLK = 1.7 MHz if 1.2 V ≤ V DD < 1.6 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SYSTEM PERFORMANCE Resolution 12 Bits No missing codes 12 Bits Integral linearity –1.5 1.5 LSB(1) Differential linearity –1 1.5 LSB 1.2 V ≤ V DD < 1.6 V –2 2 Offset error(2) LSB 1.6 V ≤ V DD ≤ 3.6 V –3 3 1.2 V ≤ V DD < 1.6 V –2 2 Gain error(3) LSB 1.6 V ≤ V DD ≤ 3.6 V –2 2 1.2 V ≤ V DD < 1.6 V –2.5 2.5 Total unadjusted error(4) LSB 1.6 V ≤ V DD ≤ 3.6 V –3.5 3.5 SAMPLING DYNAMICS (See Timing Characteristics Section) tCONVERT Conversion time fSCLK = 3.4 MHz, 13 SCLK cycles 3.82 µs tSAMPLE Acquisition time fSCLK = 3.4 MHz, 1.6 V ≤ VDD ≤ 3.6 V 0.64 µs fSAMPLE Throughput rate fSCLK = 3.4 MHz, 1.6 V ≤ VDD ≤ 3.6 V 200 KSPS Aperture delay 10 ns Aperture jitter 40 ps DYNAMIC CHARACTERISTICS fIN = 30 kHz, 1.2 V ≤ VDD < 1.6 V 68 Signal-to-noise SINAD dB and distortion fIN = 30 kHz, 1.6 V ≤ VDD ≤ 3.6 V 69 70 fIN = 30 kHz, 1.2 V ≤ VDD < 1.6 V 70 SNR Signal-to-noise ratio dB fIN = 30 kHz, 1.6 V ≤ VDD ≤ 3.6 V 70 71 fIN = 30 kHz, 1.2 V ≤ VDD < 1.6 V –70 THD Total harmonic distortion(5) dB fIN = 30 kHz, 1.6 V ≤ VDD ≤ 3.6 V –83 fIN = 30 kHz, 1.2 V ≤ VDD < 1.6 V 75 Spurious free dynamic SFDR dB range fIN = 30 kHz, 1.6 V ≤ VDD ≤ 3.6 V 85 At 0.1 dB, 1.2 V ≤ V DD < 1.6 V 2 At 0.1 dB, 1.6 V ≤ V DD ≤ 3.6 V 4 Full-power bandwidth(6) MHz At 3 dB, 1.2 V ≤ V DD < 1.6 V 3 At 3 dB, 1.6 V ≤ V DD ≤ 3.6 V 8 ANALOG INPUT Full-scale input span(7) VIN – GND 0 VDD V CS Input capacitance 12 pF Input leakage current –1 1 µA DIGITAL INPUT Logic family , CMOS 1.2 V ≤ V DD < 1.6 V 0.7 ×V DD 3.6 1.6 V ≤ V DD < 1.8 V 0.7 ×V DD 3.6 VIH Input logic high level V 1.8 V ≤ V DD < 2.5 V 0.7 ×V DD 3.6 2.5 V ≤ V DD ≤ 3.6 V 2 3.6 (1) LSB = Least Significant BIt (2) The difference in the first code transition 000...000 to 000...001 from the ideal value of GND + 1 LSB. (3) The difference in the last code transition 011...111 to 111...111 from the ideal value of VDD - 1 LSB with the offset error removed. (4) The absolute difference from the ideal transfer function of the converter. This specification is similar to INL error except the effects of offset error and gain error are included. (5) The 2nd through 10th harmonics are used to determine THD. (6) Input frequency where the amplitude of the digitized signal has decreased by 0.1 dB or 3 dB. (7) Ideal input span which does not include gain or offset errors. 3 |
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