8-Bit, Microprocessor-Compatible, A/D Converters 5 t! ?( i, A1 {" KThe ADC0802 family are CMOS 8-Bit, successive-approximation " ~; I4 R$ O* `' pA/D converters which use a modified potentiometric ) l1 f8 P- I8 Bladder and are designed to operate with the 8080A control . ]% ~( T8 d. @' w8 hbus via three-state outputs. These converters appear to the7 c; `( f& c7 W$ V1 |& J' }5 X
processor as memory locations or I/O ports, and hence no+ e1 N- m" O) q5 K9 q8 T. {" L
interfacing logic is required.8 \( A; \( B. D3 `2 O) p6 r
The differential analog voltage input has good commonmode-# K7 R$ l. Y/ b# U" B, V0 M% l
rejection and permits offsetting the analog zero-inputvoltage- |7 k. ?7 |. d8 k3 @' D
value. In addition, the voltage reference input can be : V+ N- b5 R8 X2 j7 Cadjusted to allow encoding any smaller analog voltage span - X! ?4 W- `& h8 U% Yto the full 8 bits of resolution.: E% g; x+ a; S% l. I% ~& X
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发表于 2008-12-21 09:55:58
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