OPA3S2859-EP
ZHCSMS7B –APRIL 2021 –REVISED DECEMBER 2021
www.ti.com.cn
5 Pin Configuration and Functions
22
20
19
23
21
24
VS-
INA+
SEL1
1
2
3
4
18
17
VS+
LTCH_A
LTCH_B
16
15
VS+
PD
Thermal
Pad
SEL0
INB+
5
6
VS+
VS-
14
13
图5-1. RTW Package
24-Pin WQFN With Exposed Thermal Pad
Top View
表5-1. Pin Functions
PIN
I/O
DESCRIPTION
NAME
NO.
23
8
COM_A
COM_B
I
I
Photodiode input –Channel A
Photodiode input –Channel B
Feedback connection to Channel A –TIA Gain Resistor (Low gain, optimized for gain in < 10 kΩ
FB_A0
FB_A1
20
21
I
I
range)
Feedback connection to Channel A –TIA Gain Resistor
(Mid gain, optimized for gain in 10 kΩ –100 kΩ range)
Feedback connection to Channel A –TIA Gain Resistor (High gain, optimized for gain in > 100 kΩ
FB_A2
FB_B0
22
11
I
I
range)
Feedback connection to Channel B –TIA Gain Resistor (Low gain, optimized for gain in < 10 kΩ
range)
Feedback connection to Channel B –TIA Gain Resistor
(Mid gain, optimized for gain in 10 kΩ –100 kΩ range)
FB_B1
FB_B2
10
9
I
I
Feedback connection to Channel B –TIA Gain Resistor (High gain, optimized for gain in > 100 kΩ
range)
INA-
INA+
INB-
INB+
24
1
I
I
I
I
Negative (inverting) input for amplifier A
Positive (noninverting) input for amplifier A
Negative (inverting) input for amplifier B
Positive (noninverting) input for amplifier B
7
6
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