Rainbow Electronics ADC12048 User Manual
General description, Key specifications, Features
TL H 12387
ADC12048
12-Bit
Plus
Sign
216
kHz
8-Channel
Sampling
Analog-to-Digital
Converter
December 1995
ADC12048
12-Bit Plus Sign 216 kHz 8-Channel Sampling
Analog-to-Digital Converter
General Description
Operating from a single 5V power supply the ADC12048 is a
12 bit a sign parallel I O self-calibrating sampling analog-
to-digital converter (ADC) with an eight input fully differential
analog multiplexer The maximum sampling rate is 216 kHz
On request the ADC goes through a self-calibration pro-
cess that adjusts linearity zero and full-scale errors
The ADC12048’s 8-channel multiplexer is software pro-
grammable to operate in a variety of combinations of single-
ended differential or pseudo-differential modes The fully
differential MUX and the 12-bit a sign ADC allows for the
difference between two signals to be digitized
The ADC12048 can be configured to work with many popu-
lar microprocessors microcontrollers including National’s
HPC family
Intel386 and 8051
TMS320C25
Motorola
MC68HC11 16
Hitachi
64180
and
Analog
Devices
ADSP21xx
For complementary voltage references see the LM4040
LM4041 or LM9140
Key Specifications
(f
CLK
e
12 MHz)
Y
Resolution
12-bits a sign
Y
13-bit conversion time
3 6 ms max
Y
13-bit throughput rate
216 ksamples s min
Y
Integral Linearity Error (ILE)
g
1 LSB max
Y
Single Supply
a
5V
g
10%
Y
V
IN
Range
GND to V
A
a
Y
Power consumption
Normal operation
34 mW max
Stand-by mode
75 mw max
Features
Y
8-channel programmable Differential or Single-Ended
multiplexer
Y
Programmable Acquisition Times and user-controllable
Throughput Rates
Y
Programmable data bus width (8 13 bits)
Y
Built-in Sample-and-Hold
Y
Programmable Auto-Calibration and Auto-Zero cycles
Y
Low power standby mode
Y
No missing codes
Applications
Y
Medical instrumentation
Y
Process control systems
Y
Test equipment
Y
Data logging
Y
Inertial guidance
Block Diagram
TL H 12387 – 1
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation
RRD-B30M26 Printed in U S A