Datasheet

AD5934 Data Sheet
Rev. C | Page 8 of 32
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
NC
1
NC
2
NC
3
RFB
4
SCL
16
SDA
15
AGND2
14
AGND1
13
VIN
5
VOUT
6
NC
7
DGND
12
AVDD2
11
AVDD1
10
MCLK
NOTES:
1. IT IS RECOMMENDED TO TIE ALL SUPPLY
CONNECTIONS (PIN 9, PIN 10, AND PIN 11)
AND RUN FROM A SINGLE SUPPLY BETWEEN
2.7V AND 5.5V.
2. IT IS ALSO RECOMMENDED TO
CONNECT ALL GROUND SIGNALS TOGETHER
(PIN 12, PIN 13, AND PIN 14).
8
DVDD
9
NC = NO CONNECT
AD5934
TOP VIEW
(Not to Scale)
05325-003
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 to 3, 7 NC No Connect. Do not connect to this pin.
4 RFB External Feedback Resistor. Connect from Pin 4 to Pin 5. This pin sets the gain of the current-to-voltage amplifier
on the receive side.
5 VIN Input to Receive Transimpedance Amplifier. VIN presents a virtual earth voltage of VDD/2.
6 VOUT Excitation Voltage Signal Output.
8 MCLK The master clock for the system is supplied by the user.
9 DVDD Digital Supply Voltage.
10 AVDD1 Analog Supply Voltage 1. Used for powering the analog core.
11 AVDD2 Analog Supply Voltage 2. Used for internal references.
12 DGND Digital Ground.
13 AGND1 Analog Ground 1.
14 AGND2 Analog Ground 2.
15 SDA I
2
C® Data Input.
16 SCL I
2
C Clock Input.