12-Bit Plus Sign Data Acquisition System With Self-Calibration

The LM12458 and LM12H458 are highly integrated Data Acquisition Systems. Operating on just 5V, they combine a fully-differential self-calibrating (correcting linearity and zero errors) 13-bit (12-bit + sign) Analog-to-digital converter (ADC) and sample-and-hold (S/H) with extensive Analog functions and digital functionality. Up to 32 consecutive conversions, using two's complement format, CAN be stored in an internal 32-word (16-bit wide) FIFO data Buffer An internal 8-word RAM CAN store the conversion sequence for up to eight acquisitions through the LM12(H)458's eight-input multiplexer. The obsolete LM12454 has a four-channel multiplexer, a differential multiplexer output, and a differential S/H input. The LM12(H)458 CAN also operate with 8-bit + sign resolution and in a supervisory "watchdog" mode that compares an input signal against two programmable limits.
Programmable acquisition times and conversion rates are possible through the use of internal clock-driven Timers The reference voltage input CAN be externally generated for absolute or ratiometric operation or CAN be derived using the internal 2.5V bandgap reference.
All Registers RAM, and FIFO are directly addressable through the high speed Microprocessor Interface to either an 8-bit or 16-bit data bus. The LM12(H)458 includes a direct memory access (DMA) Interface for high-speed conversion data transfer.
Additional applications information CAN be found in applications notes AN-906, AN-947 and AN-949.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM12458CIV/NOPB Texas Instruments 12-Bit Plus Sign Data Acquisition System with Self-Calibration 44-PLCC -40 to 85
LM12458CIV Texas Instruments 12-Bit Plus Sign Data Acquisition System with Self-Calibration 44-PLCC -40 to 85
LM12458CIVX/NOPB Texas Instruments 12-Bit Plus Sign Data Acquisition System with Self-Calibration 44-PLCC -40 to 85
LM12458 's PackagesLM12458 's pdf datasheet
LM12458CIV PLCC
LM12458CIVF
LM12458EVAL
LM12458MEL-883




LM12458 Pinout, Pinouts
LM12458 pinout,Pin out
This is one package pinout of LM12458,If you need more pinouts please download LM12458's pdf datasheet.

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