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AD5941 Datasheet(PDF) 20 Page - Analog Devices

Part # AD5941
Description  High Precision, Impedance, and Electrochemical Front End
PDF  143 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5941 Datasheet(HTML) 20 Page - Analog Devices

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Data Sheet
AD5940/AD5941
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
analog.com
Rev. D | 20 of 143
Table 7. Pin Function Descriptions (Continued)
Pin No.
Mnemonic
Input/Output
Supply
Description
AD5940
AD5941
A7
47
CE0
Analog
Counter Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits.
This pin connects to the switch matrix.
A8
48
RE0
Analog
Reference Electrode Input Pin for High Bandwidth and Low Bandwidth Loop Circuits.
This pin connects to positive node of the switch matrix.
B1
33
RCAL1
Analog
Terminal B of Calibration Resistor (RCAL). Connect this pin to the switch matrix.
B2
34
AFE1
Analog
Uncommitted Analog Front End Pin 1.
B3
38
AIN1
Analog
Uncommitted Analog Input Pin 1. This pin connects to the switch matrix.
B4
40
AIN4/LPF0
Analog
Uncommitted Analog Input Pin 4 (AIN4).
Low Power TIA Output Low-Pass Filter Capacitor Pin (LPF0).
B5
36
AIN3/BUF_VREF1V8
Analog
Uncommitted Analog Input Pin 3 (AIN3).
1.82 V Reference Buffered Output (BUF_VREF1V8). This pin connects to the switch
matrix.
B6
46
DE0
Analog
Analog Input Pin. This pin connects to the input and output of the high speed TIA.
B7
9
VZERO0
Analog
Low Power, Dual-Output DAC, Zero Voltage Output Pin. Connect a 100 nF capacitor
to this pin.
B8
2
RC0_1
Analog
Low Power TIA Reconstruction Filter 0 Feedback Pin 1. This pin is connected to the
output of the low power TIA.
C1
32
RCAL0
Analog
Terminal A of Calibration Resistor. Connect this pin to the switch matrix.
C2
35
AFE2
Analog
Uncommitted Analog Front End Pin 2.
C3, D3
N/A
DNC
Analog
Do Not Connect. Do not connect to this pin.
C4
42
AGND
Ground
Analog Ground. Short this pin to Pin E3 (AGND).
C5
N/A
AIN6
Analog
Uncommitted Analog Input Pin 6.
C6
1
RC0_2
Analog
Low Power TIA Reconstruction Filter 0 Pin 2. This pin can be left open (optional).
C7
8
VBIAS0
Analog
Low Power, Dual-Output DAC Bias Voltage Output Pin. Connect a 100 nF capacitor
to this pin.
C8
3
RC0_0
Analog
Low Power TIA Feedback Pin. This pin is connected to the feedback of the low
power TIA.
D1
31
VBIAS_CAP
Analog
ADC 1.11 V Input Bias Decoupling Capacitor Pin. The recommended capacitor value
is 470 nF.
D2
39
AIN0
Analog
Uncommitted Analog Input Pin 0. This pin connects to the switch matrix.
D4, G1, G8
7, 10, 24
DNC
Not applicable
Do Not Connect. Do not connect to this pin.
D5
44
AGND_REF
Ground
Analog Reference Ground.
D6
20
GPIO1
Digital input/output General-Purpose Input/Output Pin 1.
D7
4
VREF_2V5
Analog
2.5 V Analog Reference Decoupling Capacitor Pin. Connect a 470 nF capacitor to
this pin.
D8
5
AVDD_REG
Supply
Analog Regulator Decoupling Capacitor Pin.
E1
21
GPIO2
Digital input/output General-Purpose Input/Output Pin 2.
E2
N/A
GPIO3
Digital input/output General-Purpose Input/Output Pin 3.
E3
29
AGND
Ground
Analog Ground. Short this pin to Pin C4.
E4 to E6
13, 23, 25
DGND
Ground
Digital Ground.
E7
17
MOSI
Digital input
SPI Initiator Output, Target Input.
E8
18
MISO
Digital output
SPI Initiator Input Target Output.
F1
22
RESET
Digital input
Reset Pin, Active Low.
F2
30
AVDD
Supply
Analog 3.3 V Circuit Power.
F3
6
DVDD
Supply
Digital Circuit Power.
F4
N/A
GPIO6
Digital input/output General-Purpose Input/Output Pin 6.
F5
19
GPIO0
Digital input/output General-Purpose Input/Output Pin 0.
F6
N/A
GPIO5
Digital input/output General-Purpose Input/Output Pin 5.
F7
15
CS
Digital input/output SPI Chip Select.



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