LM12458CIVF

更新时间： 2024-11-22 22:28:35

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
43页	993K
描述
12-Bit Sign Data Acquisition System with Self-Calibration

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM12458CIVF 数据手册

July 1999

LM12454/LM12458/LM12H458

12-Bit + Sign Data Acquisition System with

Self-Calibration

General Description

Key Specifications

(f_CLK5 MHz; 8 MHz, H)

The LM12454, LM12458, and LM12H458 are highly inte-

grated Data Acquisition Systems. Operating on just 5V, they

combine a fully-differential self-calibrating (correcting linear-

ity 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 consecu-

tive 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 LM12454 has a four-channel

multiplexer, a differential multiplexer output, and a differential

S/H input. The LM12454 and LM12(H)458 can also operate

with 8-bit + sign resolution and in a supervisory “watchdog”

mode that compares an input signal against two program-

mable limits.

Resolution

12-bit + sign or 8-bit + sign

8.8 µs, 5.5 µs (H) (max)

4.2 µs, 2.6 µs (H) (max)

13-bit conversion time

9-bit conversion time

13-bit Through-put rate

88k samples/s (min),

140k samples/s (H) (min)

Comparison time

2.2 µs (max),

1.4 µs (H) (max)

(“watchdog” mode)

1 LSB (max)

ILE

V_INrange

GND to V_A

Power dissipation

Stand-by mode

Single supply

30 mW, 34 mW (H) (max)

50 µW (typ)

3V to 5.5V

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 ab-

solute or ratiometric operation or can be derived using the in-

ternal 2.5V bandgap reference.

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 and 2.5V bandgap reference

n Instruction RAM and event sequencer

n 8-channel (LM12(H)458), 4-channel (LM12454)

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 LM12454 and LM12(H)458 in-

clude

a direct memory access (DMA) interface for

high-speed conversion data transfer.

n 32-word conversion FIFO

An evaluation/interface board is available. Order num-

ber LM12458EVAL.

n Programmable acquisition times and conversion rates

n Self-calibration and diagnostic mode

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

interface

Additional applications information can be found in applica-

tions notes AN-906, AN-947 and AN-949.

Applications

n Data Logging

n Instrumentation

n Process Control

n Energy Management

n Inertial Guidance

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

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

DS011264

www.national.com

12 3 4 5 6 7...43

中文翻译

下载PDF

与LM12458CIVF相关器件

型号	品牌	获取价格	描述	数据表
LM12458CIVX	NSC	获取价格	12-Bit + Sign Data Acquisition System with Self-Calibration
LM12458CIVX/NOPB	TI	获取价格	具有自校准功能的 88kSPS、12 位 + 符号数据采集系统 \| FN \| 44 \| -
LM12458CMEL/883	ETC	获取价格	Single-Ended Data Acquisition System
LM12458MEL/883	ETC	获取价格	Single-Ended Data Acquisition System
LM12458MW/883	ETC	获取价格	Single-Ended Data Acquisition System
LM1246	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character
LM1246AAA	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character
LM1246AAA/NA	NSC	获取价格	IC 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24, PLASTIC, DIP-24, Audio/Video Amplifier
LM1246NA	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character
LM1247	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character

与LM12458CIVF相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

35
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

26
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

54
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

52

产品中心

服务支持

精选活动

关于我们

帮助中心

LM12458CIVF

LM12458CIVF 数据手册

与LM12458CIVF相关器件

与LM12458CIVF相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM12458CIVF

LM12458CIVF 数据手册

与LM12458CIVF相关器件

与LM12458CIVF相关文章

您还可以找

您在本页遇到什么问题？