ADC12041
12-Bit Plus Sign 216 kHz Sampling Analog-to-Digital
Converter
General Description
Operating from a single 5V power supply, the ADC12041 is a
12 bit + sign, parallel I/O, self-calibrating, sampling
analog-to-digital converter (ADC). The maximum sampling
rate is 216 kHz. On request, the ADC goes through a
self-calibration process that adjusts linearity, zero and
full-scale errors.
The ADC12041 can be configured to work with many popular
microprocessors/microcontrollers and DSPs including Na-
tional’s HPC family, Intel386 and 8051, TMS320C25, Mo-
torola MC68HC11/16, Hitachi 64180 and Analog Devices
ADSP21xx.
For complementary voltage references see the LM4040,
LM4041 or LM9140.
Features
n Fully differential analog input
n Programmable acquisition times and user-controllable
throughput rates
n Programmable data bus width (8/13 bits)
n Built-in Sample-and-Hold
n Programmable auto-calibration and auto-zero cycles
n Low power standby mode
n No missing codes
Key Specifications
(f
CLK
= 12 MHz)
n Resolution 12-bits + sign
n 13-bit conversion time 3.6 µs, max
n 13-bit throughput rate 216 ksamples/s, min
n Integral Linearity Error (ILE) ±1 LSB, max
n Single supply +5V ± 10%
n V
IN
range GND to V
A
+
n Power consumption
— Normal operation 33 mW, max
— Stand-by mode 75 µw, max
Applications
n Medical instrumentation
n Process control systems
n Test equipment
n Data logging
n Inertial guidance
Block Diagram
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
DS012441-1
April 2000
ADC12041
12-Bit
Plus
Sign
216
kHz
Sampling
Analog-to-Digital
Converter
© 2000 National Semiconductor Corporation DS012441 www.national.com