AD7400 Analog Devices, AD7400 Datasheet - Page 8

• Manufacturer Part Number: AD7400
• Description: Isolated Sigma-Delta Modulator
• Manufacturer: Analog Devices

Specifications of AD7400

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 10MSPS
• Interface: Ser
• Analog Input Type: Diff-Uni
• Ain Range: ± 0.2 V Diff,0.4 V p-p
• Adc Architecture: Sigma-Delta Modulator
• Pkg Type: SOIC

AD7400
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 8. Pin Function Descriptions
Pin No.
1
2
3
4 to 6, 10, 12, 15
7
8
9, 16
11
13
14
V
V
V
V
V
Mnemonic
NC
GND
GND
MDAT
MCLKOUT
DD1
IN
IN
DD1
DD2
+
−
/NC
1
2
Description
Supply Voltage. 4.5 V to 5.25 V. This is the supply voltage for the isolated side of the AD7400 and is relative to
GND
Positive Analog Input. Specified range of ±200 mV.
Negative Analog Input. Normally connected to GND
No Connect.
Supply Voltage. 4.5 V to 5.25 V. This is the supply voltage for the isolated side of the AD7400 and is relative
to GND
No Connect (NC). If desired, Pin 7 may be allowed to float. It should not be tied to ground. The AD7400
will operate normally provided that the supply voltage is applied to Pin 1.
Ground 1. This is the ground reference point for all circuitry on the isolated side.
Ground 2. This is the ground reference point for all circuitry on the nonisolated side.
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 MCLKOUT output and valid on the following
MCLKOUT rising edge.
Master Clock Logic Output. 10 MHz typical. The bit stream from the modulator is valid on the rising edge
of MCLKOUT.
Supply Voltage. 3 V to 5.5 V. This is the supply voltage for the nonisolated side and is relative to GND
1
.
1
.
V
DD1
GND
V
V
V
DD1
/NC
NC
NC
NC
IN
IN
+
–
Figure 5. Pin Configuration
1
1
2
3
4
5
6
7
8
NC = NO CONNECT
Rev. E | Page 8 of 20
(Not to Scale)
AD7400
TOP VIEW
16
15
14
13
12
11
10
9
GND
V
NC
MCLKOUT
NC
MDAT
NC
GND
DD2
2
2
1
.
2
.