參數(shù)資料
型號(hào)： ICL7109
廠商： Intersil Corporation
英文描述： 12-Bit,Microprocessor-Compatible A/D Converter(12位、微處理器兼容的A/D轉(zhuǎn)換器)
中文描述： 12位A/D轉(zhuǎn)換器，帶有三態(tài)二進(jìn)制輸出
文件頁(yè)數(shù)： 4/23頁(yè)
文件大?。?/td> 227K
代理商： ICL7109
5-7
Pin Descriptions
PIN
SYMBOL
DESCRIPTION
1
GND
Digital Ground, 0V. Ground return for all digital logic.
2
STATUS
Output High during integrate and deintegrate until data is latched. Output Low when analog section
is in Auto-Zero configuration.
3
POL
Polarity - HI for positive input.
Three-State Output Data Bits
4
OR
Overrange - HI if overranged.
Three-State Output Data Bits
5
B12
Bit 12
(Most Significant Bit)
Three-State Output Data Bits
6
B11
Bit 11
High = True
Three-State Output Data Bits
7
B10
Bit 10
High = True
Three-State Output Data Bits
8
B9
Bit 9
High = True
Three-State Output Data Bits
9
B8
Bit 8
High = True
Three-State Output Data Bits
10
B7
Bit 7
High = True
Three-State Output Data Bits
11
B6
Bit 6
High = True
Three-State Output Data Bits
12
B5
Bit 5
High = True
Three-State Output Data Bits
13
B4
Bit 4
High = True
Three-State Output Data Bits
14
B3
Bit 3
High = True
Three-State Output Data Bits
15
B2
Bit 2
High = True
Three-State Output Data Bits
16
B1
Bit 1
(Least Significant Bit)
Three-State Output Data Bits
17
TEST
Input High - Normal Operation. Input Low - Forces all bit outputs high. Note: This input is used for
test purposes only. Tie high if not used.
18
LBEN
Low Byte Enable - With Mode (Pin 21) low, and CE/LOAD (Pin 20) low, taking this pin low activates
low order byte outputs B1 through B8.
With Mode (Pin 21) high, this pin serves as a low byte flag output used in handshake mode.
See Figures 7, 8, 9.
19
HBEN
High Byte Enable - With Mode (Pin 21) low, and CE/LOAD (Pin 20) low, taking this pin low activates
high order byte outputs B9 through B12, POL, OR.
With Mode (Pin 21) high, this pin serves as a high byte flag output used in handshake mode.
See Figures 7, 8, 9.
20
CE/LOAD
Chip Enable Load - With Mode (Pin 21) low. CE/LOAD serves as a master output enable. When
high, B1 through B12, POL, OR outputs are disabled.
With Mode (Pin 21) high, this pin serves as a load strobe used in handshake mode.
See Figures 7, 8, 9.
21
MODE
Input Low - Direct output mode where CE/LOAD (Pin 20), HBEN (Pin 19) and LBEN (Pin 18) act as
inputs directly controlling byte outputs.
Input Pulsed High - Causes immediate entry into handshake mode and output of data as in Figure 9.
Input High - Enables CE/LOAD (Pin 20), HBEN (Pin 19), and LBEN (Pin 18) as outputs, handshake
mode will be entered and data output as in Figures 7 and 8 at conversion completion.
22
OSC IN
Oscillator Input
23
OSC OUT
Oscillator Output
ICL7109
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