AD7980ACPZ-RL Просмотр технического описания (PDF) - Analog Devices
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AD7980ACPZ-RL Datasheet PDF : 26 Pages
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AD7980
Data Sheet
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
REF 1
10 VIO
VDD 2 AD7980 9 SDI
IN+ 3 TOP VIEW 8 SCK
IN– 4 (Not to Scale) 7 SDO
GND 5
6 CNV
Figure 4. 10-Lead MSOP Pin Configuration
REF 1
VDD 2
IN+ 3
IN– 4
GND 5
AD7980
TOP VIEW
(Not to Scale)
10 VIO
9 SDI
8 SCK
7 SDO
6 CNV
NOTES
1. CONNECT THE EXPOSED PAD TO GND.
THIS CONNECTION IS NOT REQUIRED TO
MEET THE ELECTRICAL PERFORMANCES.
Figure 5. 10-Lead LFCSP Pin Configuration
Table 7. Pin Function Descriptions
Pin No.
MSOP
LFCSP Mnemonic Type1
1
1
REF
AI
2
2
VDD
P
3
3
IN+
AI
4
4
IN−
AI
5
5
GND
P
6
6
CNV
DI
7
7
SDO
DO
8
8
SCK
DI
9
9
SDI
DI
10
10
Not
0
applicable
VIO
EPAD
P
Not
applicable
Description
Reference Input Voltage. The REF range is from 2.4 V to 5.1 V. It is referred to the GND
pin. This pin should be decoupled closely to the pin with a 10 µF capacitor.
Power Supply.
Analog Input. It is referred to IN−. The voltage range, for example, the difference
between IN+ and IN−, is 0 V to VREF.
Analog Input Ground Sense. To be connected to the analog ground plane or to a remote
sense ground.
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 device, chain, or CS mode. In CS mode,
it enables the SDO pin when 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 device 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 16 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. Connect the exposed pad to GND. This connection is not required to meet
the electrical performances.
1AI = analog input, DI = digital input, DO = digital output, and P = power.
Rev. F | Page 8 of 26
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