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ADS8284IBRGCR Datasheet(PDF) 4 Page - Texas Instruments |
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ADS8284IBRGCR Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 38 page  SPECIFICATIONS ADS8284 SLAS628 – MARCH 2009................................................................................................................................................................................................... www.ti.com TA = –40°C to 85°C, VCC = 5 V, VEE = –5 V, +VA = 5 V, +VBD = 5 V or 3.3 V, Vref = 4 V, fSAMPLE = 1 MSPS (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Full-scale input voltage at multiplexer input(1) CH(i)P–CH(i)M –Vref Vref V Absolute input range at multiplexer input CH (i) –0.2 Vref + 0.2 V [CH(i)P + CH(i)M] /2 (Vref)/2 (Vref)/2 (Vref)/2 Input common-mode voltage V – 0.2 + 0.2 SYSTEM PERFORMANCE Resolution 18 Bits ADS8284IB 18 No missing codes Bits ADS8284I 18 ADS8284IB –2.5 ±1.25 2.5 Integral linearity (2) LSB (3) ADS8284I –4.5 ±1.5 4.5 ADS8284IB –1 ±0.6 1.5 Differential linearity At 18-bit level LSB(3) ADS8284I –1 ±0.6 1.5 ADS8284IB –0.5 ±0.05 0.5 Offset error mV ADS8284I –0.5 ±0.05 0.5 ADS8284IB –0.1 ±0.025 0.1 Gain error(4) External reference %FS ADS8284I –0.1 ±0.025 0.1 At 3FFF0H output code. For +VA or VCC, VEE DC power supply rejection ratio 80 dB variation of 0.5 V individually SAMPLING DYNAMICS +VBD = 5 V 625 650 ns Conversion time +VDB = 3 V 625 650 ns +VBD = 5 V 320 350 ns Acquisition time +VDB = 3 V 320 350 Maximum throughput rate 1.0 MHz Aperture delay 4 ns Aperture jitter 5 ps For ADC only 150 ns Settling time to 0.5 LSB For OPA (OP1, OP2) + mux 700 Over voltage recovery For ADC only 150 ns DYNAMIC CHARACTERISTICS ADS8284I –119 VIN = 4 Vpp at 2 kHz dB ADS8284IB –119 ADS8284I –105 Total harmonic distortion VIN = 4 Vpp at 10 kHz dB (THD)(5) ADS8284IB –105 ADS8284I –100 VIN = 4 Vpp at 100 kHz, dB LoPWR = 0 ADS8284IB –100 ADS8284I 98.4 VIN = 4 Vpp at 2 kHz dB ADS8284IB 97.5 98.4 ADS8284I 98 Signal-to-noise ratio (SNR) VIN = 4 Vpp at 10 kHz dB ADS8284IB 98 ADS8284I 95 VIN = 4 Vpp at 100 kHz, dB LoPWR = 0 ADS8284IB 97 (1) Ideal input span, does not include gain or offset error. (2) This is endpoint INL, not best fit. (3) LSB means least significant bit. (4) Calculated on the first nine harmonics of the input frequency. (5) Measured relative to acutal measured reference. 4 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s) :ADS8284 |
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