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參數(shù)資料
| 型號(hào)： | AD7709BRU |
| 廠(chǎng)商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | ADC |
| 英文描述： | LGE Kit Series; Functions: Continuous light; Rated Voltage: 120V AC; Style: Power Unit; Diameter: 100; Applicable Model: LGE |
| 中文描述： | 4-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | PLASTIC, MO-153AD, TSSOP-24 |
| 文件頁(yè)數(shù)： | 8/17頁(yè) |
| 文件大小： | 248K |
| 代理商： | AD7709BRU |
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AD7709
–8–
REV. PrA J anuary 2001
PRELIMINARY TECHNICAL DATA
PIN CONFIGURATION
Pin Function Description
Pin No
Mnemonic
Function
1
IOU T 1
Output for internal excitation current sources. A single current source or any
combination of the internal current sources I1,I2 and I3 can be switched to this
output.
Output for internal excitation current sources. A single current source or any
combination of the internal current sources I1,I2 and I3 can be switched to this
output.
Positive reference input. REFIN(+) can lie anywhere between V
DD
and GND.
T he nominal reference voltage (REFIN(+)-REFIN(-)) is 2.5V but the part is
functional with a reference range from 1V to V
DD
.
Negative reference input. T his reference input can lie anywhere between GND
and V
DD
-1V.
Analog Input Channel 1. Programmable-gain analog input which can be used
as a pseudo-differential input when used with AINCOM or as the positive in-
put of a fully-differential input pair when used with AIN2. (see Communica-
tions Register section)
Analog Input Channel 2. Programmable-gain analog input which can be used
as a pseudo-differential input when used with AINCOM or as the negative
input of a fully-differential input pair when used with AIN1. (see Communica-
tions Register section)
Analog Input Channel 3 or Digital Port Bit. Programmable-gain analog input
which can be used as a pseudo-differential input when used with AINCOM or
as the positive input of a fully-differential input pair when used with AIN4.
T he second function of this bit is as a general purpose digital input bit.
Analog Input Channel 4 or digital port bit. Programmable-gain analog input
which can be used as a pseudo-differential input when used with AINCOM or
as the negative input of a fully-differential input pair when used with AIN3.
T he second function of this bit is as a general purpose digital input bit.
All analog inputs are referenced to this input when configured in pseudo-dif-
ferential input mode.
Positive reference input. REFIN2(+) can lie anywhere between V
DD
and GND.
T he nominal reference voltage (REFIN2(+)-REFIN2(-)) is 2.5V but the part
is functional with a reference range from 1V to V
DD
.
2
IOU T 2
3
R E F IN1(+)
4
R E F IN1(-)
5
AIN1
6
AIN2
7
AIN3/P3
8
AIN4/P4
9
A IN C OM
10
R E F IN2(+)
TOP VIEW
(Not to Scale)
SCLK
CS
RESET
AIN1
AINCOM
GND
V
DD
DIN
DOUT
DRDY
REFIN1(-)
REFIN1(+)
AD7709
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
XTAL1
AIN3/P3
AIN 2
21
22
23
24
AIN4/P4
REFIN2(+)
P2/SW2
PWRGND
P1/SW1
XTAL2
IOUT 1
IOUT 2
REFIN2(-)
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