Datasheet > LM12L458

LM12L458

更新时间： 2025-08-01 22:51:59

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
36页	697K
描述
12-Bit Sign Data Acquisition System with Self-Calibration

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LM12L458 数据手册

July 1999

LM12L458

12-Bit + Sign Data Acquisition System with

Self-Calibration

General Description

The LM12L458 is a highly integrated 3.3V Data Acquisition

System. It combines a fully-differential self-calibrating (cor-

Key Specifications

(f_CLK6 MHz)

n Resolution

12-bit + sign or 8-bit + sign

7.3 µs

recting linearity and zero errors) 13-bit (12-bit

+ sign)

n 13-bit conversion time

n 9-bit conversion time

n 13-bit Through-put rate

analog-to-digital converter (ADC) and sample-and-hold

(S/H) with extensive analog functions and digital functional-

ity. Up to 32 consecutive conversions, using two’s comple-

ment 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 LM12L458’s eight-input multiplexer. The LM12L458 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.

3.5 µs

106k samples/s (min)

n Comparison time (“watchdog” mode)

n ILE

1.8 µs (max)

1 LSB (max)

GND to V_A

n V_INrange

n Power dissipation

n Stand-by mode

n Single supply

15 mW (max)

5 µW (typ)

3V to 5.5V

Features

n Three operating modes: 12-bit + sign, 8-bit + sign, and

“watchdog”

n Single-ended or differential inputs

n Built-in Sample-and-Hold

n Instruction RAM and event sequencer

n 8-channel multiplexer

All registers, RAM, and FIFO are directly addressable

through the high speed microprocessor interface to either an

8-bit or 16-bit databus. The LM12L458 includes a direct

memory access (DMA) interface for high-speed conversion

data transfer.

n 32-word conversion FIFO

Applications

n Data Logging

n Process Control

n Energy Management

n Medical Instrumentation

n Programmable acquisition times and conversion rates

n Self-calibration and diagnostic mode

n 8- or 16-bit wide databus microprocessor or DSP

interface

n CMOS compatible I/O

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

AT^®is a registered trademark of International Business Machines Corporation.

DS011711

www.national.com

12 3 4 5 6 7...36

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与LM12L458相关器件

型号	品牌	获取价格	描述	数据表
LM12L458CIV	NSC	获取价格	12-Bit Sign Data Acquisition System with Self-Calibration
LM12L458CIVF	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PQCC44, PACKAGE-44
LM12L458CIVX	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PQCC44, PLASTIC, LCC-44
LM12L458_06	NSC	获取价格	12-Bit + Sign Data Acquisition System with Self-Calibration
LM12LK	NSC	获取价格	IC OP-AMP, 7000 uV OFFSET-MAX, MBFM5, Operational Amplifier
LM12LK	ROCHESTER	获取价格	Operational Amplifier, 1 Func, 7000uV Offset-Max, MBFM4, MILITARY
LM12S02	SHARP	获取价格	Color STN LCD Module
LM12S40	SHARP	获取价格	Analog Circuit,
LM12S402	SHARP	获取价格	Color STN-LCD Module
LM12S44	SHARP	获取价格	Color STN-LCD Module

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