AD7690 查看數據表（PDF） - Analog Devices
零件编号
产品描述 (功能)
生产厂家
AD7690 Datasheet PDF : 24 Pages
| |||
Data Sheet
AD7690
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
REF 1
VDD 2
IN+ 3
IN– 4
GND 5
10 VIO
AD7690
TOP VIEW
(Not to Scale)
9 SDI
8 SCK
7 SDO
6 CNV
Figure 5. 10-Lead MSOP Pin Configuration
REF 1
VDD 2
IN+ 3
IN– 4
GND 5
AD7690
TOP VIEW
(Not to Scale)
10 VIO
9 SDI
8 SCK
7 SDO
6 CNV
NOTES
1. THE EXPOSED PAD IS NOT CONNECTED
INTERNALLY. FOR INCREASED RELIABILITY OF
THE SOLDER JOINTS, IT IS RECOMMENDED THAT
THE PAD BE SOLDERED TO THE GROUND PLANE.
Figure 6. 10-Lead LFCSP Pin Configuration
Table 6. Pin Function Descriptions
Pin No. Mnemonic
Type1
1
REF
AI
2
VDD
P
3
IN+
AI
4
IN−
AI
5
GND
P
6
CNV
DI
7
SDO
DO
8
SCK
DI
9
SDI
DI
10
VIO
P
EPAD
Description
Reference Input Voltage. The REF range is from 0.5 V to VDD. It is referred to the GND pin. This
pin should be decoupled closely to the pin with a 10 μF capacitor.
Power Supply.
Differential Positive Analog Input.
Differential Negative Analog Input.
Power Supply Ground.
Convert Input. This input has multiple functions. On its leading edge, it initiates the conversions
and selects the interface mode of the part, chain or CS mode. In CS mode, the SDO pin is
enabled when CNV is low. In chain mode, the data should be read when CNV is high.
Serial Data Output. The conversion result is output on this pin. It is synchronized to SCK.
Serial Data Clock Input. When the part is selected, the conversion result is shifted out by this clock.
Serial Data Input. This input provides multiple features. It selects the interface mode of the ADC
as follows:
Chain mode is selected if SDI is low during the CNV rising edge. In this mode, SDI is used as a
data input to daisy-chain the conversion results of two or more ADCs onto a single SDO line.
The digital data level on SDI is output on SDO with a delay of 18 SCK cycles.
CS mode is selected if SDI is high during the CNV rising edge. In this mode, either SDI or CNV
can enable the serial output signals when low. If SDI or CNV is low when the conversion is
complete, the busy indicator feature is enabled.
Input/Output Interface Digital Power. Nominally at the same supply as the host interface (1.8 V,
2.5 V, 3 V, or 5 V).
Exposed Pad. The exposed pad is not connected internally. For increased reliability of the solder
joints, it is recommended that the pad be soldered to the ground plane.
1AI = analog input, DI = digital input, DO = digital output, and P = power.
Rev. C | Page 7 of 24
Share Link: 