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LM4031AI Folha de dados(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças LM4031AI
Descrição Electrónicos  Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4031AI Folha de dados(HTML) 3 Page - National Semiconductor (TI)

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Connection Diagrams (Continued)
24-Pin Wide Body
SO, SSOP-EIAJ Packages
28-Pin Wide Body
SO Packages
01135408
Top View
01135409
Top View
Ordering Information
Industrial Temperature Range
Package
−40˚C
≤ T
A
≤ +85˚C
ADC12H030CIWM, ADC12030CIWM
M16B
ADC12H032CIWM, ADC12032CIWM
M20B
ADC12H034CIN, ADC12034CIN
N24C
ADC12H034CIWM, ADC12034CIWM
M24B
ADC12H034CIMSA
MSA24
ADC12H038CIWM, ADC12038CIWM
M28B
Pin Descriptions
CCLK
The clock applied to this input controls the
sucessive approximation conversion time in-
terval and the acquisition time. The rise and
fall times of the clock edges should not ex-
ceed 1 µs.
SCLK
This is the serial data clock input. The clock
applied to this input controls the rate at
which the serial data exchange occurs. The
rising edge loads the information on the DI
pin into the multiplexer address and mode
select shift register. This address controls
which channel of the analog input multi-
plexer (MUX) is selected and the mode of
operation for the A/D. With CS low the falling
edge of SCLK shifts the data resulting from
the previous ADC conversion out on DO,
with the exception of the first bit of data.
When CS is low continously, the first bit of
the data is clocked out on the rising edge of
EOC (end of conversion). When CS is
toggled the falling edge of CS always clocks
out the first bit of data. CS should be brought
low when SCLK is low. The rise and fall
times of the clock edges should not exceed
1 µs.
DI
This is the serial data input pin. The data
applied to this pin is shifted by the rising
edge of SCLK into the multiplexer address
and mode select register. Table 2 through
Table 5 show the assignment of the multi-
plexer address and the mode select data.
DO
The data output pin. This pin is an active
push/pull output when CS is low. When CS
is high, this output is TRI-STATE. The A/D
conversion result (D0–D12) and converter
status data are clocked out by the falling
edge of SCLK on this pin. The word length
and format of this result can vary (see Table
1). The word length and format are con-
trolled by the data shifted into the multiplexer
address and mode select register (see Table
5).
EOC
This pin is an active push/pull output and
indicates the status of the ADC12030/2/4/8.
When low, it signals that the A/D is busy with
a conversion, auto-calibration, auto-zero or
power down cycle. The rising edge of EOC
signals the end of one of these cycles.
CS
This is the chip select pin. When a logic low
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