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| 型号： | LM12L458CIV |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | 12-Bit Sign Data Acquisition System with Self-Calibration |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 1/36页 |
| 文件大小： | 695K |
| 代理商： | LM12L458CIV |
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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-
recting linearity 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 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.
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.
Applications
n
Data Logging
n
Process Control
n
Energy Management
n
Medical Instrumentation
Key Specifications
(f
CLK
= 6 MHz)
n
Resolution
n
13-bit conversion time
n
9-bit conversion time
n
13-bit Through-put rate
n
Comparison time (“watchdog” mode)
n
ILE
n
V
IN
range
n
Power dissipation
n
Stand-by mode
n
Single supply
12-bit + sign or 8-bit + sign
7.3 μs
3.5 μs
106k samples/s (min)
1.8 μs (max)
±
1 LSB (max)
GND to V
A+
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
n
32-word conversion FIFO
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.
July 1999
L
1999 National Semiconductor Corporation
DS011711
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM12L458CIV/NOPB | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| LM12L458CIVF | 制造商:Rochester Electronics LLC 功能描述:12-BIT PARALLEL I/O DAS - Bulk |
| LM12L458CIVF/NOPB | 制造商:Texas Instruments 功能描述:ADC Single 114ksps 12-bit+Sign Parallel 44-Pin PLCC |
| LM12P123 | 制造商:SOURIAU 功能描述: 制造商:Souriau Connection Technology 功能描述: |
| LM12S02 | 制造商:SHARP 制造商全称:Sharp Electrionic Components 功能描述:Color STN LCD Module |
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