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參數(shù)資料
| 型號(hào)： | LM12L454CIV |
| 英文描述： | IC-SM-12 BIT DAS |
| 中文描述： | 集成電路的Sm - DAS的12位 |
| 文件頁數(shù)： | 1/36頁 |
| 文件大?。?/td> | 538K |
| 代理商： | LM12L454CIV |
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TL/H/11711
L
a
S
April 1995
LM12L454/LM12L458 12-Bit
a
Sign Data Acquisition System with Self-Calibration
General Description
The LM12L454 and LM12L458 are highly integrated 3.3V
Data Acquisition Systems. They combine a fully-differential
self-calibrating (correcting linearity and zero errors) 13-bit
(12-bit
a
sign) analog-to-digital converter (ADC) and sam-
ple-and-hold (S/H) with extensive analog functions and digi-
tal 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 LM12L458’s eight-input multiplex-
er. The LM12L454 has a four-channel multiplexer, a differ-
ential multiplexer output, and a differential S/H input. The
LM12L454 and LM12L458 can also operate with 8-bit
a
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.
All registers, RAM, and FIFO are directly addressable
through the high speed microprocessor interface to either
an 8-bit or 16-bit databus. The LM12L454 and LM12L458
include a direct memory access (DMA) interface for high-
speed conversion data transfer.
Key Specifications
(f
CLK
e
6 MHz)
Y
Resolution
12-bit
a
sign or 8-bit
a
sign
Y
13-bit conversion time
7.3
m
s
3.5
m
s
Y
9-bit conversion time
Y
13-bit Through-put rate
106k samples/s (min)
Y
Comparison time
(‘‘watchdog’’ mode)
1.8
m
s (max)
g
1 LSB (max)
GND to V
A
a
15 mW (max)
5
m
W (typ)
3V to 5.5V
Y
ILE
Y
V
IN
range
Y
Power dissipation
Y
Stand-by mode
Y
Single supply
Features
Y
Three operating modes: 12-bit
a
sign, 8-bit
a
sign,
and ‘‘watchdog’’
Y
Single-ended or differential inputs
Y
Built-in Sample-and-Hold
Y
Instruction RAM and event sequencer
Y
8-channel (LM12L458), 4-channel (LM12L454)
multiplexer
Y
32-word conversion FIFO
Y
Programmable acquisition times and conversion rates
Y
Self-calibration and diagnostic mode
Y
8- or 16-bit wide databus microprocessor or DSP
interface
Y
CMOS compatible I/O
Applications
Y
Data Logging
Y
Process Control
Y
Energy Management
Y
Medical Instrumentation
Connection Diagram
TL/H/11711–1
*
Pin names in ( ) apply to the LM12L454.
Order Number LM12L454CIV or LM12L458CIV
See NS Package Number V44A
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
AT
is a registered trademark of International Business Machines Corporation.
C
1995 National Semiconductor Corporation
RRD-B30M75/Printed in U. S. A.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM12L458 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit + Sign Data Acquisition System with Self-Calibration |
| LM12L458_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit + Sign Data Acquisition System with Self-Calibration |
| LM12L458CIV | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| LM12L458CIV/NOPB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| LM12L458CIVF | 制造商:Rochester Electronics LLC 功能描述:12-BIT PARALLEL I/O DAS - Bulk |
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