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AD7403 датащи(PDF) 10 Page - Analog Devices

номер детали AD7403
подробное описание детали  16-Bit, Isolated Sigma-Delta Modulator
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домашняя страница  http://www.analog.com
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AD7403 датащи(HTML) 10 Page - Analog Devices

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Data Sheet
AD7403
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
VDD1 1
VIN+ 2
VIN– 3
GND1 4
GND2
16
NIC2
15
VDD2
14
MCLKIN
13
NIC1
5
NIC2
12
NIC1
6
MDAT
11
VDD1 7
NIC2
10
GND1 8
GND2
9
1NIC = NOT INTERNALLY CONNECTED. CONNECT TO VDD1, GND1, OR LEAVE FLOATING.
2NIC = NOT INTERNALLY CONNECTED. CONNECT TO VDD2, GND2, OR LEAVE FLOATING.
AD7403
TOP VIEW
(Not to Scale)
Figure 5. AD7403 Pin Configuration
Table 10. AD7403 Pin Function Descriptions
Pin No.
Mnemonic
Description
1, 7
VDD1
Supply Voltage, 4.5 V to 5.5 V. This is the supply voltage for the isolated side of the AD7403 and is relative to GND1.
For device operation, connect the supply voltage to both Pin 1 and Pin 7. Decouple each supply pin to GND1 with
a 10 µF capacitor in parallel with a 1 nF capacitor.
2
VIN+
Positive Analog Input.
3
VIN−
Negative Analog Input. Normally connected to GND1.
4, 8
GND1
Ground 1. This pin is the ground reference point for all circuitry on the isolated side.
5, 6
NIC
Not Internally Connected. These pins are not internally connected. Connect to VDD1, GND1, or leave floating.
9, 16
GND2
Ground 2. This pin is the ground reference point for all circuitry on the nonisolated side.
10, 12, 15
NIC
Not Internally Connected. These pins are not internally connected. Connect to VDD2, GND2, or leave floating.
11
MDAT
Serial Data Output. The single bit modulator output is supplied to this pin as a serial data stream. The bits are
clocked out on the rising edge of the MCLKIN input and are valid on the following MCLKIN rising edge.
13
MCLKIN
Master Clock Logic Input. 5 MHz to 20 MHz frequency range. The bit stream from the modulator is propagated on
the rising edge of the MCLKIN.
14
VDD2
Supply Voltage, 3 V to 5.5 V. This is the supply voltage for the nonisolated side and is relative to GND2. Decouple
this supply to GND2 with a 100 nF capacitor.
VDD1 1
VDD2
VIN+ 2
VIN– 3
GND1 4
8
7
6
MCLKIN
MDAT
GND2
5
AD7403-8
TOP VIEW
(Not to Scale)
Figure 6. AD7403-8 Pin Configuration
Table 11. AD7403-8 Pin Function Descriptions
Pin No.
Mnemonic
Description
1
VDD1
Supply Voltage, 4.5 V to 5.5 V. This is the supply voltage for the isolated side of the AD7403-8 and is relative to GND1.
For device operation, connect the supply voltage to both Pin 1 and Pin 7. Decouple each supply pin to GND1 with
a 10 µF capacitor in parallel with a 1 nF capacitor.
2
VIN+
Positive Analog Input.
3
VIN−
Negative Analog Input. Normally connected to GND1.
4
GND1
Ground 1. This pin is the ground reference point for all circuitry on the isolated side.
5
GND2
Ground 2. This pin is the ground reference point for all circuitry on the nonisolated side.
6
MDAT
Serial Data Output. The single bit modulator output is supplied to this pin as a serial data stream. The bits are
clocked out on the rising edge of the MCLKIN input and are valid on the following MCLKIN rising edge.
7
MCLKIN
Master Clock Logic Input. 5 MHz to 20 MHz frequency range. The bit stream from the modulator is propagated on
the rising edge of the MCLKIN.
8
VDD2
Supply Voltage, 3 V to 5.5 V. This is the supply voltage for the nonisolated side and is relative to GND2. Decouple
this supply to GND2 with a 100 nF capacitor.
Rev. B | Page 9 of 24


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