8-Bit, Microprocessor-Compatible, A/D Converters# X- P4 [/ ? ^% }4 `
The ADC0802 family are CMOS 8-Bit, successive-approximation 4 C3 |; N0 ~( t' Q7 t# mA/D converters which use a modified potentiometric + G, H/ n& n, tladder and are designed to operate with the 8080A control. _2 ~) H4 ]; c: {- E4 X
bus via three-state outputs. These converters appear to the. u0 r# b' i$ x( v3 [3 V6 _
processor as memory locations or I/O ports, and hence no# @2 \- l0 w% C5 S) j
interfacing logic is required.. a! l) j( A! ?0 ~6 Z7 T2 h8 @/ Y
The differential analog voltage input has good commonmode-2 _& g- [ T, {% o( W$ D
rejection and permits offsetting the analog zero-inputvoltage $ f4 |- {& a2 e9 v8 U1 xvalue. In addition, the voltage reference input can be 2 V$ }2 {0 q2 D7 T% \adjusted to allow encoding any smaller analog voltage span: A$ ^/ v1 ]% }. y' A6 D
to the full 8 bits of resolution. 9 Z! u% T1 n. l- d9 V- N* |
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发表于 2008-12-21 09:55:58
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