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參數(shù)資料
| 型號： | LM12434 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Sign Data Acquisition System with Serial I/O and Self-Calibration |
| 中文描述： | 注冊數(shù)據(jù)采集系統(tǒng)的串行I / O和自校準 |
| 文件頁數(shù)： | 23/80頁 |
| 文件大?。?/td> | 1561K |
| 代理商： | LM12434 |
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5.0 Pin Descriptions
TABLE I. LM12
à
L
ó
438 Pin Description
Pin Number
Pin Name
Description
PLCC
Pkg.
SO
Pkg.
1
7
DGND
Digital ground. This is the device’s digital supply ground connection. It should be connected
through a low resistance and low inductance ground return to the system power supply.
2
3
4
5
6
7
8
9
8
9
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
These are the eight analog inputs to the multiplexer. For each conversion to be performed, the
active channels are selected according to the instruction RAM programming. Any individual
channel can be selected for a single-ended conversion referenced to AGND, or any pair of
channels, whether adjacent or non adjacent, can be selected as a fully differential input pairs.
10
11
12
13
14
15
10
16
V
REF
a
Positive reference input. The operating voltage range for this input is 1V
s
V
REF
a
s
V
A
a
(See
Figures 3 and4). In order to achieve 12-bit performance this pin should be by passed to AGND
at least with a parallel combination of a 10
m
F and a 0.1
m
F (ceramic) capacitor. The capacitors
should be placed as close to the part as possible.
11
17
V
REF
b
Negative reference input. The operating voltage range for this input is 0 V
s
V
REF
b
s
V
REF
a
b
1V (SeeFigures 3 and4). In order to achieve 12-bit performance, this pin should be bypassed
to AGND at least with a parallel combination of a 10
m
F and a 0.1
m
F (ceramic) capacitor. The
capacitors should be placed as close to the part as possible.
12
18
AGND
Analog ground. This is the device’s analog supply ground connection. It should be connected
through a low resistance and low inductance ground return to the system power supply.
13
19
V
A
a
Analog supply. This is the supply connection for the analog circuitry. The device operating supply
voltage range is
a
3.0V to
a
5.5V. Accuracy is guaranteed only if the V
A
a
and V
D
a
are
connected to the same potential. In order to achieve 12-bit performance, this pin should be
bypassed to AGND at least with a parallel combination of a 10
m
F and a 0.1
m
F (ceramic)
capacitor. The capacitors should be placed as close to the part as possible.
14
20
DGND
Digital ground. See above definition.
15
16
21
22
V
D
a
Digital supply. This is the supply connection for the analog circuitry. The device operating supply
voltage range is
a
3.0V to
a
5.5V. The device accuracy is guaranteed only if the V
A
a
and V
D
a
are connected to the same potential. In order to achieve 12-bit performance this pin should be
by passed to DGND at least with a parallel combination of a 10
m
F and a 0.1
m
F (ceramic)
capacitor. The capacitors should be placed as close to the part as possible.
17
23
P5
P1–P5 are the multi-function serial interface input or output pins that have different assignments
depending on the selected mode.
Serial interface input:
Standard:
8051:
I
2
C:
TMS320:
SCLK
TXD
SCL
DR
18
24
P4
Serial interface input/output: Standard:
DO
RXD
SDA
DR
8051:
I
2
C:
TMS320:
19
25
P3
Serial interface input:
Standard:
8051:
I
2
C:
TMS320:
DI
CS
SAD2
DX
23
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM12434CIV | Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12434CIWM | Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12454 | General Purpose Controller Z84C15 |
| LM12454 | 12-Bit Sign Data Acquisition System with Self-Calibration |
| LM12454CIV | 12-Bit Sign Data Acquisition System with Self-Calibration |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM12434CIV | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12434CIWM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12438CIV | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12438CIWM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Sign Data Acquisition System with Serial I/O and Self-Calibration |
| LM12454 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:General Purpose Controller Z84C15 |
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