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Description
12-Bit Sign Data Acquisition System with Self-Calibration
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FEATURES
● Three operating modes: 12-bit + sign,8-bit + sign, and "watchdog"
● Single-ended or differential inputs
● Built-in Sample-and-Hold and 2.5V bandgap reference
● Instruction RAM and event sequencer. 8-channel multiplexer
● 32-word conversion FIFO
● Programmable acquisition times and conversion rates
● Self-calibration and diagnostic mode
● 8- or 16-bit wide data bus microprocessor or DSP interface
APPLICATIONS
● Data Logging
● Instrumentation
● Process Control
● Energy Management
● Inertial Guidance
DESCRIPTION
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 (SIH)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 FIF0 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.
Preview of the first 3 pages of the data sheet
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10000 buyer reviews from United States
Jacob Howard
Length of registration:7 years
The LM12458CIV integrated circuit is a high-performance, low-power voltage regulator designed to provide a stable output voltage over a wide range of input voltages. It features an adjustable output voltage range of 1.2V to 5.5V, and is capable of supplying up to 500mA of output current. The LM12458CIV is an ideal choice for applications requiring a reliable, low-power voltage regulator.
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03/17/2023
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LM12458CIV
LM12458CIV has several brands around the world that may have alternate names for LM12458CIV due to regional differences or acquisition. LM12458CIV may also be known as the following names:
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Stock Status: 10000
Minimum: 2
Total Price:
Unit Price:3.27840
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