ADC1225

Features:

`Compatible with all Ps
`True differential analog voltage inputs
` 0V to 5V analog voltage range with single 5V supply
`TTL/MOS input/output compatible
` Low powerÐ25 mW max
`Standard 24-pin or 28-pin DIP


Pinout

Specifications

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage (DV_CC and AV_CC).......... 6.5V
Negative Supply Voltage (V-)........ -15V to GND
Logic Control Inputs...........  -0.3V to +15V
Voltage at Analog Inputs
[V_IN(+), V_IN(-)] ..........(V^-)b0.3V to V_CC+0.3V
Voltage at All Outputs, V_REF, V_OS ..-0.3V to (V_CC+0.3)V
Input Current per Pin............... ±5mA
Input Current per Package ...... .....±20mA
Storage Temperature Range ..... .-65 to +150
Package Dissipation at T_A=25......... 875 mW
Lead Temp. (Soldering, 10 seconds)........ 300
ESD Susceptibility (Note 12) .............800V 


Description

The ADC1205 and ADC1225 are CMOS, 12-bit plus sign successive approximation A/D converters. The 24-pin ADC1205 outputs the 13-bit data result in two 8-bit bytes, formatted high-byte first with sign extended. The 28-pin ADC1225 outputs a 13-bit word in parallel for direct interface to a 16-bit data bus.

Negative numbers are represented in 2's complement data format. All digital signals are fully TTL and MOS compatible.

A unipolar input (0V to 5V) can be accommodated with a single 5V supply, while a bipolar input (b5V to a5V) requires the addition of a 5V negative supply. The ADC1205C and ADC1225C have a maximum non-linearity of 0.0224% of Full Scale.