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ADC12041
12-Bit Plus Sign 222 KHz Sampling Analog-to-Digital Converter
TL/H/12441
ADC12041
12-Bit
Plus
Sign
kHz
Sampling
Analog-to-Digital
Converter
December 1995
ADC12041
12-Bit Plus Sign 216 kHz Sampling
Analog-to-Digital Converter
General Description
Operating froma single 5Vpowersupplythe ADC12041isabita sign, parallel I/O, self-calibrating,sampling analog-
to-digital converter (ADC). The maximum sampling rateis
216 kHz.On request,the ADC goes througha self-calibra-
tion processthat adjusts linearity, zeroand full-scale errors.
The ADC12041canbe configuredto workwith 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 seethe LM4040,
LM4041or LM9140.
Key Specifications (fCLKe12 MHz) Resolution 12-bitsa sign 13-bit conversion time 3.6ms, max 13-bit throughputrate 216 ksamples/s,min Integral Linearity Error (ILE) g1 LSB, max Single supply a5Vg 10% VIN range GNDto VAa Power consumption:
Normal operation 33 mW, max
Stand-by mode 75mw, max
Features Fully differential analog input Programmable acquisition times and user-controllable
throughput rates Programmable databus width (8/13 bits) Built-in Sample-and-Hold Programmable auto-calibrationand auto-zero cycles Low power standby modeNo missing codes
Applications Medical instrumentation Process control systems Test equipment Data logging Inertial guidance
Block Diagram
TL/H/12441–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporations.
C1996National SemiconductorCorporation RRD-B30M26/PrintedinU.S.A.
