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AD7890AR-2 データシート(PDF) 6 Page - Analog Devices

部品番号 AD7890AR-2
部品情報  LC2MOS 8-Channel, 12-Bit Serial, Data Acquisition System
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ホームページ  http://www.analog.com
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AD7890AR-2 データシート(HTML) 6 Page - Analog Devices

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AD7890
–6–
REV. A
PIN CONFIGURATION
DIP and SOIC
AGND
SMODE
REF OUT/REF IN
VIN8
CONVST
CLK IN
SCLK
VIN5
VIN4
VIN3
DGND
CEXT
VIN7
VIN6
TFS
VIN2
RFS
VIN1
DATA OUT
AGND
DATA IN
SHA IN
VDD
MUX OUT
14
1
2
24
23
5
6
7
20
19
18
3
4
22
21
8
17
9
16
10
15
11
TOP VIEW
(Not to Scale)
11
12
13
AD7890
Pin
Mnemonic
Description
17
VIN2
Analog Input Channel 2. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
18
VIN3
Analog Input Channel 3. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
19
VIN4
Analog Input Channel 4. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
20
VIN5
Analog Input Channel 5. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
21
VIN6
Analog Input Channel 6. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
22
VIN7
Analog Input Channel 7. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
23
VIN8
Analog Input Channel 8. Single-ended analog input. The analog input range on is
±10 V (AD7890-
10), 0 V to +4.096 V (AD7890-4) and 0 V to +2.5 V (AD7890-2). The channel to be converted is
selected using the A0, A1 and A2 bits in the control register. The multiplexer has guaranteed
break-before-make operation.
24
REF OUT/REF IN
Voltage Reference Output/Input. The part can be used with either its own internal reference or with
an external reference source. The on-chip +2.5 V reference voltage is provided at this pin. When
using this internal reference as the reference source for the part, REF OUT should decoupled to
AGND with a 0.1
µF disc ceramic capacitor. The output impedance of this reference source is typi-
cally 2 k
Ω. When using an external reference source as the reference voltage for the part, the refer-
ence source should be connected to this pin. This overdrives the internal reference and provides the
reference source for the part. The REF IN input is buffered on-chip. The nominal reference voltage
for correct operation of the AD7890 is +2.5 V.


同様の部品番号 - AD7890AR-2

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