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ADS8422IPFBT Datasheet(PDF) 8 Page - Texas Instruments |
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ADS8422IPFBT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 29 page www.ti.com TYPICAL CHARACTERISTICS 68 14024 13025 93 234937 0 50000 100000 150000 200000 250000 FFFD FFFE FFFF 0000 0001 Code-Hex +VA =5V, +VAREG=3V, +VBD=3V, IntREFIN=4.096V, 262144Points, Sigma=0.325, 78 13793 235679 12575 19 0 50000 100000 150000 200000 250000 FFFD FFFE FFFF 0000 0001 Code-Hex +VA =5V, +VAREG=3V, +VBD=3V, ExtREFIN=4.096V, 262144Points, Sigma=0.319, 4.094 4.095 4.096 4.097 4.098 -40 -25 -10 5 20 35 50 65 80 T -Free-AirTemperature- C A º D1 D3 D2 +VA =5V, +VAREG=3V, +VBD=3V ADS8422 SLAS512B – JUNE 2006 – REVISED DECEMBER 2006 TERMINAL FUNCTIONS (continued) NAME NO I/O DESCRIPTION DB9 22 O D9 D1 D9 DB8 23 O D8 D0 (LSB) D8 DB7 26 O D7 All ones D7 DB6 27 O D6 All ones D6 DB5 28 O D5 All ones D5 DB4 29 O D4 All ones D4 DB3 30 O D3 All ones D3 DB2 31 O D2 All ones D2 DB1 32 O D1 All ones D1 DB0 33 O D0 (LSB) All ones D0 (LSB) –IN 7 I Inverting input channel +IN 6 I Noninverting input channel NC 11 – No connection Low true signal. A logic low longer than 1.5 µs applied to this pin powers down only the analog outputs that include PD2 37 I REFOUT and COMMOUT. (NOTE: The combination PD1 = 1, PD2 = 0 is reserved. Do not use this combination.) REFIN 1 I Reference input. Add 0.1- µF decoupling capacitor between REFIN and REFM. REFOUT 2 O Reference output. Add 1- µF capacitor between the REFOUT pin and REFM pin when internal reference is used. REFM 47, 48 I Reference ground Low true signal. A low pulse applied to this pin resets the ADC; the ongoing conversion is aborted. A low pulse shorter RESET/PD1 38 I than 0.5 µs only resets, and one longer than 1.5 µs resets and also powers down the ADC. Note that analog outputs REFOUT and COMMOUT can be powered down by PD2, if necessary. RD 41 I Synchronization pulse for the parallel output. +VA 4, 46 – Analog power supplies, 4.75 V to 5.25 VDC +VAREG 10 – Regulator supply, 2.85 V to 5.25 VDC +VBD 24, 34 – Digital power supply for bus INTERNAL REFERENCE VOLTAGE HISTOGRAM OF 262144 HISTOGRAM OF 262144 vs CONVERSIONS OF DC INPUT AT CONVERSIONS OF DC INPUT AT FREE-AIR TEMPERATURE CENTER CODE (Internal Reference) CENTER CODE (External Reference) (Three Devices Shown) Figure 1. Figure 2. Figure 3. 8 Submit Documentation Feedback |
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