ADC1005
10-Bit µP Compatible A/D Converter
General Description
The ADC1005 is a CMOS 10-bit successive approximation
A/D converter. The 20-pin ADC1005 outputs 10-bit data in a
two-byte format for interface with 8-bit microprocessors.
The ADC1005 has differential inputs to permit rejection of
common-mode signals, allow the analog input range to be
offset, and also to permit the conversion of signals not re-
ferred to ground. In addition, the reference voltage can be
adjusted, allowing smaller voltage spans to be measured
with 10-bit resolution.
Features
n Easy interface to all microprocessors
n Differential analog voltage inputs
n Operates ratiometrically or with 5 V
DC
voltage reference
or analog span adjusted voltage reference
n 0V to 5V analog input voltage range with single 5V
supply
n On-chip clock generator
n TLL/MOS input/output compatible
n 0.3" standard width 20-pin DIP
Key Specifications
n Resolution 10 bits
n Linearity Error ±
1
⁄2 LSB and ±1 LSB
n Conversion Time 50 µs
Connection Diagram
Ordering Information
Part Number Package Temperature Linearity
Outline Range Error
ADC1005BCJ-1 J20A 0˚C to +70˚C ±
1
⁄2 LSB
ADC1005BCJ J20A −40˚C to +85˚C
ADC1005CCJ-1 J20A 0˚C to +70˚C ±1 LSB
ADC1005CCJ J20A −40˚C to +85˚C
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
ADC 1005 (for an 8–bit data bus)
Dual-In-Line Package
DS005261-1
Top View
June 1999
ADC1005
10-Bit
µP
Compatible
A/D
Converter
© 1999 National Semiconductor Corporation DS005261 www.national.com