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ADS7887 Datasheet(PDF) 4 Page - Burr-Brown (TI) |
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ADS7887 Datasheet(HTML) 4 Page - Burr-Brown (TI) |
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4 / 23 page  www.ti.com ADS7887 SPECIFICATIONS ADS7887 ADS7888 SLAS468 – JUNE 2005 +V DD = 2.35 V to 5.25 V, TA = –40°C to 125°C, fsample = 1.25 MHz PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT Full-scale input voltage span(1) 0 VDD V Absolute input voltage range +IN –0.20 VDD+0.20 V Ci Input capacitance(2) 21 pF IIlkg Input leakage current TA = 125°C 40 nA SYSTEM PERFORMANCE Resolution 10 Bits No missing codes 10 Bits INL Integral nonlinearity –0.75 ±0.35 0.75 LSB(3) DNL Differential nonlinearity –0.5 ±0.35 0.5 LSB EO Offset error(4)(5)(6) –1.5 ±0.5 1.5 LSB EG Gain error(5) –1 ±0.5 1 LSB SAMPLING DYNAMICS Conversion time 25-MHz SCLK 530 560 ns Acquisition time 260 ns Maximum throughput rate 25-MHz SCLK 1.25 MHz Aperture delay 5 ns Step Response 160 ns Overvoltage recovery 160 ns DYNAMIC CHARACTERISTICS THD Total harmonic distortion(7) 100 kHz –84 –72 dB SINAD Signal-to-noise and distortion 100 kHz 60.5 61 dB SFDR Spurious free dynamic range 100 kHz 73 81 dB Full power bandwidth At –3 dB 15 MHz DIGITAL INPUT/OUTPUT Logic family — CMOS VDD = 2.35 V to 5.25 V VDD– 5.25 VIH High-level input voltage V 0.4 VDD = 5 V 0.8 VIL Low-level input voltage V VDD = 3 V 0.4 VOH High-level output voltage At Isource = 200 µA VDD–0.2 V VOL Low-level output voltage At Isink = 200 µA 0.4 POWER SUPPLY REQUIREMENTS +VDD Supply voltage 2.35 3.3 5.25 V At VDD = 2.35 V to 5.25 V, 1.25-MHz throughput 2 Supply current (normal mode) mA At VDD = 2.35 V to 5.25 V, static state 1.5 SCLK off 1 Power down state supply current µA SCLK on (25 MHz) 200 VDD = 5 V 8 10 Power dissipation at 1.25 MHz mW throughput VDD = 3 V 3.8 6 (1) Ideal input span; does not include gain or offset error. (2) Refer Figure 36 for details on sampling circuit (3) LSB means least significant bit (4) Measured relative to an ideal full-scale input (5) Offset error and gain error ensured by characterization. (6) First transition of 000H to 001H at 0.5 × (Vref/210) (7) Calculated on the first nine harmonics of the input frequency 4 |
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