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LM12L458 データシート(PDF) 1 Page - Texas Instruments

部品番号 LM12L458
部品情報  12-Bit Sign Data Acquisition System with Self-Calibration
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM12L458 データシート(HTML) 1 Page - Texas Instruments

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LM12L458
www.ti.com
SNAS085B – JULY 1999 – REVISED MARCH 2013
LM12L458 12-Bit + Sign Data Acquisition System with Self-Calibration
Check for Samples: LM12L458
1
FEATURES
DESCRIPTION
The LM12L458 is a highly integrated 3.3V Data
2
Three Operating Modes: 12-Bit + Sign, 8-Bit +
Acquisition System. It combines a fully-differential
Sign, and “Watchdog”
self-calibrating (correcting linearity and zero errors)
Single-Ended or Differential Inputs
13-bit (12-bit + sign) analog-to-digital converter (ADC)
Built-In Sample-and-Hold
and sample-and-hold (S/H) with extensive analog
functions
and
digital
functionality.
Up
to
32
Instruction RAM and Event Sequencer
consecutive conversions, using two's complement
8-Channel Multiplexer
format, can be stored in an internal 32-word (16-bit
32-Word Conversion FIFO
wide) FIFO data buffer. An internal 8-word RAM can
store the conversion sequence for up to eight
Programmable Acquisition Times and
acquisitions
through
the
LM12L458's
eight-input
Conversion Rates
multiplexer. The LM12L458 can also operate with 8-
Self-Calibration and Diagnostic Mode
bit + sign resolution and in a supervisory “watchdog”
8- or 16-Bit Wide Data Bus Microprocessor or
mode that compares an input signal against two
DSP Interface
programmable limits. Programmable acquisition times
and conversion rates are possible through the use of
CMOS Compatible I/O
internal clock-driven timers.
APPLICATIONS
All registers, RAM, and FIFO are directly addressable
through the high speed microprocessor interface to
Data Logging
either an 8-bit or 16-bit data bus. The LM12L458
Process Control
includes a direct memory access (DMA) interface for
high-speed conversion data transfer.
Energy Management
Medical Instrumentation
Additional applications information can be found in
applications
notes
AN-906
(JAJA265),
AN-947
KEY SPECIFICATIONS
(SNAA012), and AN-949 (SNAA013).
(fCLK = 6 MHz)
Resolution: 12-Bit + Sign or 8-Bit + Sign
Single Supply: +3 to +5.5 V
13-bit Conversion Time: 7.3
μs
9-bit Conversion Time: 3.5
μs
13-bit Through-Put Rate: 106 k Samples/s
(Min)
Comparison Time (“Watchdog” Mode): 1.8
μs
(Max)
ILE: ±1 LSB (Max)
Power Consumption: 15 mW (max)
Stand-By Mode: 5
μW (typ)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1999–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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