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ADS8674IDBT Datasheet(PDF) 8 Page - Texas Instruments |
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ADS8674IDBT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 79 page ADS8674, ADS8678 SBAS627 – JULY 2015 www.ti.com Electrical Characteristics (continued) Minimum and maximum specifications are at TA = –40°C to 125°C. Typical specifications are at TA = 25°C. AVDD = 5 V, DVDD = 3 V, VREF = 4.096 V (internal), and fSAMPLE = 500 kSPS, unless otherwise noted. TEST PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LEVEL(1) DYNAMIC CHARACTERISTICS Input range = ±2.5 × VREF 84.5 85 A Input range = ±1.25 × VREF 84.2 85 A Input range = ±0.625 × VREF 83.5 84.5 A Input range = ±0.3125 × VREF 80 82 A Signal-to-noise ratio SNR Input range = ±0.15625 × VREF 75 77 dB A (VIN – 0.5 dBFS at 1 kHz) Input range = 2.5 × VREF 84 85 A Input range = 1.25 × VREF 83.5 84.5 A Input range = 0.625 × VREF 80 82 A Input range = 0.3125 × VREF 75 77 A Total harmonic distortion(7) THD All input ranges –100 dB B (VIN – 0.5 dBFS at 1 kHz) Input range = ±2.5 × VREF 84.3 84.8 A Input range = ±1.25 × VREF 84 84.8 A Input range = ±0.625 × VREF 83.3 84.3 A Input range = ±0.3125 × VREF 80 82 A Signal-to-noise ratio SINAD Input range = ±0.15625 × VREF 75 77 dB A (VIN – 0.5 dBFS at 1 kHz) Input range = 2.5 × VREF 83.8 84.8 A Input range = 1.25 × VREF 83.3 84.3 A Input range = 0.625 × VREF 80 82 A Input range = 0.3125 × VREF 75 77 A Spurious-free dynamic range SFDR All input ranges 101 dB B (VIN – 0.5 dBFS at 1 kHz) Aggressor channel input overdriven Crosstalk isolation(8) 110 dB B to 2 × maximum input voltage Aggressor channel input overdriven Crosstalk memory(9) 90 dB B to 2 × maximum input voltage BW(–3 dB) Small-signal bandwidth, –3 dB At TA = 25°C, all input ranges 15 kHz B BW(–0.1 dB) Small-signal bandwidth, –0.1 dB At TA = 25°C, all input ranges 2.5 kHz B AUXILIARY CHANNEL Resolution 14 Bits A V(AUX_IN) AUX_IN voltage range (AUX_IN – AUX_GND) 0 VREF V A AUX_IN 0 VREF V A Operating input range AUX_GND 0 V A During sampling 75 pF C Ci Input capacitance During conversion 5 pF C IIkg(in) Input leakage current 100 nA A DNL Differential nonlinearity –0.75 ±0.5 0.75 LSB A INL Integral nonlinearity –1 ±0.5 1 LSB A EG(AUX) Gain error At TA = 25°C ±0.02 ±0.2 %FSR A EO(AUX) Offset error At TA = 25°C –5 5 mV A SNR Signal-to-noise ratio V(AUX_IN) = –0.5 dBFS at 1 kHz 83.3 84.4 dB A THD Total harmonic distortion(7) V(AUX_IN) = –0.5 dBFS at 1 kHz –100 dB B SINAD Signal-to-noise + distortion V(AUX_IN) = –0.5 dBFS at 1 kHz 83 84.3 dB A SFDR Spurious-free dynamic range V(AUX_IN) = –0.5 dBFS at 1 kHz 100 dB B (7) Calculated on the first nine harmonics of the input frequency. (8) Isolation crosstalk is measured by applying a full-scale sinusoidal signal up to 10 kHz to a channel, not selected in the multiplexing sequence, and measuring its effect on the output of any selected channel. (9) Memory crosstalk is measured by applying a full-scale sinusoidal signal up to 10 kHz to a channel that is selected in the multiplexing sequence, and measuring its effect on the output of the next selected channel for all combinations of input channels. 8 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS8674 ADS8678 |
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