AD7194 Analog Devices, AD7194 Datasheet - Page 10

• Manufacturer Part Number: AD7194
• Description: 8-Channel, 4.8 kHz, Ultralow Noise, 24-Bit Sigma-Delta ADC with PGA
• Manufacturer: Analog Devices

Specifications of AD7194

• Resolution (bits): 24bit
• # Chan: 8
• Sample Rate: n/a
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref/PGA Gain) p-p
• Adc Architecture: Sigma-Delta
• Pkg Type: CSP

AD7194
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 5. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Mnemonic
AIN1/P3
AIN2/P2
AIN3/P1/REFIN2(+)
AIN4/P0/REFIN2(−)
AINCOM
AGND
AIN5
AIN6
AIN7
AIN8
AIN9
AIN10
AIN11
AIN12
AIN13
AIN14
REFIN1(+)
REFIN1(−)
AIN15
AIN16
AGND
DGND
Description
Analog Input/Digital Output Pin. This pin can function as an analog input pin. When the GP32EN bit is set
to 1, the pin functions as a general-purpose output bit referenced between AV
Analog Input/Digital Output Pin. This pin can function as an analog input pin. When the GP32EN bit is set
to 1, the pin functions as a general-purpose output bit referenced between AV
Analog Input/Digital Output Pin/Positive Reference Input. This pin functions as an analog input pin. When
the GP10EN bit is set to 1, the pin functions as a general-purpose output bit referenced between AV
AGND. When the REFSEL bit in the configuration register is set to 1, this pin functions as REFIN2(+). An
external reference can be applied between REFIN2(+) and REFIN2(−). REFIN2(+) can lie anywhere between
AV
Analog Input/Digital Output Pin/Positive Reference Input. This pin functions as an analog input pin. When
the GP10EN bit is set to 1, the pin functions as a general-purpose output bit referenced between AV
AGND. When the REFSEL bit in the configuration register is set to 1, this pin functions as REFIN2(−). An
external reference can be applied between REFIN2(+) and REFIN2(−). This reference input can lie anywhere
between AGND and AV
Analog Input AIN1 to Analog Input AIN16 are referenced to this input when the bit pseudo is set to 1.
Analog Ground Reference Point.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Analog Input Pin.
Positive Reference Input. An external reference can be applied between REFIN1(+) and REFIN1(−).
REFIN1(+) can lie anywhere between AV
REFIN1(−)), is AV
Negative Reference Input. This reference input can lie anywhere between AGND and AV
Analog Input Pin.
Analog Input Pin.
Analog Ground Reference Point.
Digital Ground Reference Point.
DD
and AGND + 1 V.
AIN3/P1/REFIN2(+)
AIN4/P0/REFIN2(–)
NOTES
1. NC = NO CONNECT.
2. CONNECT EXPOSED PAD TO AGND.
DD
, but the part functions with a reference from 1 V to AV
AINCOM
AIN1/P3
AIN2/P2
AGND
AIN5
AIN6
DD
Figure 5. Pin Configuration
− 1 V.
1
2
3
4
5
6
7
8
Rev. 0 | Page 10 of 56
(Not to Scale)
AD7194
TOP VIEW
DD
and AGND + 1 V. The nominal reference voltage, (REFIN1(+) −
24 DV
23 AV
22 DGND
21 AGND
20 AIN16
19 AIN15
18 REFIN1(–)
17 REFIN1(+)
DD
DD
DD
.
DD
DD
and AGND.
and AGND.
DD
− 1 V.
DD
DD
and
and