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参数资料
| 型号： | ADC0851BIN |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | ADC |
| 英文描述： | 8-Bit Analog Data Acquisition and Monitoring Systems |
| 中文描述： | 2-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP16 |
| 封装： | PLASTIC, DIP-16 |
| 文件页数： | 13/36页 |
| 文件大小： | 581K |
| 代理商： | ADC0851BIN |
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Pin Descriptions
V
CC
Positive power supply pin. Bypass to analog
ground with a 0.1
m
F ceramic capacitor in
parallel with a 10
m
F tantalum capacitor.
Input/Output pin used to generate internal
timing for A/D conversion. This pin is con-
nected to an external resistor and capacitor
to set the oscillation frequency for analog
timing (see Figure 12 ).
OSC
CS
This is the chip select input pin. It must be
held low while data is transferred to or from
the ADC0851/8 (see Timing Diagram).
CLK
The serial clock input pin is used to clock
serial data either into the data input pin (DI)
or out of the data output pin (DO). Input data
is loaded on the rising edge of CLK and the
output data is valid at the falling edge of
CLK.
DI
Serial data digital input pin.
DO
TRI-STATE data output pin.
INT
This is the active low interrupt pin that indi-
cates that at least one analog input channel
voltage
level
has
grammed window limits. Since this pin has
an open drain output, an external pull up re-
sistor is required. This allows many devices
to be wire-ORed together using a single
pull-up resistor.
exceeded
the
pro-
EOC
End of conversion output pin. The low state
indicates that an A/D conversion is in prog-
ress. The EOC pin goes high when the con-
version is completed.
AGND
Analog ground reference.
DGND
Digital ground reference for the logic inputs.
Both AGND and DGND should be at same
potential.
V
REF
This is the analog reference pin. The volt-
age applied to this pin sets the full scale
A/D conversion range. Recommended volt-
ages applied to this pin range from 1V to
V
CC
. Bypass to analog ground with a 0.1
m
F
ceramic capacitor in parallel with a 10
m
F
tantalum capacitor.
COM
The COM pin functions as an inverting dif-
ferential input common to all analog inputs
when each channel is configured as a sin-
gle-ended channel. If the input channels are
programmed as differential pairs then the
COM input has no effect.
CH0–CH1
(ADC0851)
CH0–CH7 are analog input channels which
can be configured as single ended inputs or
as differential pairs. The analog input volt-
age should stay within the power supply
range.
CH0–CH7
(ADC0858)
COMPL,
COMPH
These output pins are available only on the
ADC0851. During ‘‘Watchdog’’ operation, if
either of the inputs exceeds the window lim-
its, not only is an interrupt generated but
also the COMPL and COMPH pins go low to
indicate whether the upper or lower bounda-
ry was exceeded (See applications section
for more information.)
13
相关PDF资料 |
PDF描述 |
|---|---|
| ADC0851BIV | 8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0851CIN | 8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0851CIV | 8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0858CIN | 8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0858CIV | 8-Bit Analog Data Acquisition and Monitoring Systems |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC0851BIV | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0851CIJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Single-Ended Data Acquisition System |
| ADC0851CIN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0851CIV | 制造商:NSC 制造商全称:National Semiconductor 功能描述:8-Bit Analog Data Acquisition and Monitoring Systems |
| ADC0851CMJ/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Single-Ended Data Acquisition System |
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