AD7684 Analog Devices, AD7684 Datasheet - Page 7

• Manufacturer Part Number: AD7684
• Manufacturer: Analog Devices

Specifications of AD7684

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 100kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: SOP

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 7. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
1
AI = analog input, DI = digital input, DO = digital output, and P = power.
Mnemonic
REF
+IN
–IN
GND
CS
D
DCLOCK
VDD
OUT
Type
AI
AI
AI
P
DI
DO
DI
P
1
Description
Reference Input Voltage. The REF range is from 0.5 V to VDD. This pin is referred to the GND pin and
should be decoupled closely to the GND pin with a ceramic capacitor of a few μF.
Differential Positive Analog Input. Referenced to −IN. The input range for +IN is between 0 V and V
centered about V
Differential Negative Analog Input. Referenced to +IN. The input range for −IN is between V
centered about V
Power Supply Ground.
Chip Select Input. On its falling edge, it initiates the conversions. The part returns to shutdown mode as
soon as the conversion is complete. It also enables D
Serial Data Output. The conversion result is output on this pin. It is synchronized to DCLOCK.
Serial Data Clock Input.
Power Supply.
REF
REF
Figure 6. 8-Lead MSOP Pin Configuration
/2 and must be driven 180° out of phase with −IN.
/2 and must be driven 180° out of phase with +IN.
GND
REF
+IN
–IN
1
2
3
4
Rev. A | Page 7 of 16
(Not to Scale)
AD7684
TOP VIEW
8
7
6
5
VDD
DCLOCK
D
CS
OUT
OUT
. When high, D
OUT
is high impedance.
REF
AD7684
and 0 V,
REF
,