AD7693BRMZ Datasheet, PDF (7/24 Pages) Analog Devices – 16-Bit, ±0.5 LSB, 500 kSPS PulSAR® Differential ADC in MSOP/QFN

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
AD7693
REF 1
VDD 2
IN+ 3
IN– 4
GND 5
10 VIO
AD7693
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
AD7693
TOP VIEW
(Not to Scale)
10 VIO
9 SDI
8 SCK
7 SDO
6 CNV
NOTES
1. THE EXPOSED PAD IS CONNECTED
TO GND. THIS CONNECTION IS NOT
REQUIRED TO MEET THE ELECTRICAL
PERFORMANCES.
Figure 6. 10-Lead QFN (LFCSP) Pin Configuration
Table 6. Pin Function Descriptions
Pin No. Mnemonic
Type ¹
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 chain mode, the data should be
read when CNV is high. In CS mode, the SDO pin is enabled when CNV is low.
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 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 and 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 connected to GND. This connection is not required to meet
the electrical performances. The exposed pad is only on the 10-Lead QFN (LFCSP).
1_{AI = analog input, DI = digital input, DO = digital output, and P = power.}
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