Datasheet

Data Sheet AD7683
Rev. B | Page 7 of 16
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
04301-005
REF 1
+IN
2
–IN 3
GND
4
VDD 8
DCLOCK
7
D
OUT
6
CS
5
AD7683
TOP VIEW
(Not to Scale)
Figure 6. 8-Lead MSOP Pin Configuration
Table 8. 8-Lead MSOP Pin Function Descriptions
Pin No. Mnemonic Type
1
Function
1 REF AI
Reference Input Voltage. The REF range is from 0.5 V to VDD. It is referred to the GND pin. Decouple the
REF pin closely to the GND pin with a ceramic capacitor of a few μF.
2 +IN AI
Analog Input. It is referred to Pin –IN. The voltage range, that is, the difference between +IN and –IN, is 0 V
to V
REF
.
3 –IN AI Analog Input Ground Sense. Connect this pin to either the analog ground plane or a remote sense ground.
4 GND P Power Supply Ground.
5
CS
DI
Chip Select Input. On its falling edge, it initiates the conversions. The part returns to shutdown mode as
soon as the conversion is completed. It also enables D
OUT
. When high, D
OUT
is high impedance.
6 D
OUT
DO Serial Data Output. The conversion result is output on this pin. It is synchronized to DCLOCK.
7 DCLOCK DI Serial Data Clock Input.
8 VDD P Power Supply.
1
AI = analog input; DI = digital input; DO = digital output; and P = power.
04301-107
3–IN
4GND
1REF
2+IN
6D
OUT
5CS
NOTES
1. EXPOSED PAD. CONNECT THE EXPOSED PAD TO GND. THIS CONNECTION
IS NOT REQUIRED TO MEET SPECIFIED ELECTRICAL PERFORMANCE.
8VDD
7 DCLOCK
AD7683
TOP VIEW
(Not to Scale)
Figure 7. 8-Lead QFN (LFCSP) Pin Configuration
Table 9. 8-Lead QFN (LFCSP) Pin Function Descriptions
Pin No. Mnemonic Type
1
Function
1 REF AI
Reference Input Voltage. The REF range is from 0.5 V to VDD. It is referred to the GND pin. Decouple the
REF pin closely to the GND pin with a ceramic capacitor of a few μF.
2 +IN AI
Analog Input. It is referred to Pin –IN. The voltage range, that is, the difference between +IN and –IN, is 0 V
to V
REF
.
3 –IN AI Analog Input Ground Sense. Connect this pin to either the analog ground plane or a remote sense ground.
4 GND P Power Supply Ground.
5
CS
DI
Chip Select Input. On its falling edge, it initiates the conversions. The part returns to shutdown mode as
soon as the conversion is completed. It also enables D
OUT
. When high, D
OUT
is high impedance.
6 D
OUT
DO Serial Data Output. The conversion result is output on this pin. It is synchronized to DCLOCK.
7 DCLOCK DI Serial Data Clock Input.
8 VDD P Power Supply.
EPAD
Exposed Pad. Connect the exposed pad to GND. This connection is not required to meet specified
electrical performance.
1
AI = analog input; DI = digital input; DO = digital output; and P = power.