Texas Instruments TLV3602EVM, User Manual, Page: 9 / 19

+
–
0
INA-
INA+
INA+ Sense
Option for
100 LVDS
Termination
TLV3602A
Option for 50
Termination
GND
Option for 0
Termination to GND
GND
R7
R3
R4
R1
+
–
0
INB-
INB+
INB+ Sense
Option for
100 LVDS
Termination TLV3602B
Option for 50
Termination
GND
Option for 0
Termination to GND
GND
R8
R5
R6
R2
Figure 5-3. Input Side Schematic
5.3 Outputs
R12 and R14 are known as attenuation resistors, and they are used to attenuate the output by setting the
top half of a voltage divider circuit, with the bottom half supplied by the load, such as an oscilloscope’s
internal termination. It is not advisable to populate these pads with a low value resistor as the TLV3602
outputs are not intended to drive a 50 Ω load; the amount of current sourced would be significant. A 1 kΩ
resistor is recommended for this footprint which, coupled with a scope's internal 50 Ω termination creates an
attenuation factor of 21:1 which can be rectified using oscilloscope settings. A high speed probe may be used for
measurement of the output, but rise and fall times may be limited.
+
–
Attenuation
OUTA
TLV3602A
R14
+
–
Attenuation
OUTB
TLV3602B
R12
Figure 5-4. Output Side Block Diagram
5.4 Hysteresis
The TLV3602EVM is able to support external hysteresis for each TLV3602 non-inverting input. When configuring
the EVM for hysteresis, the non-inverting input signal should now be connected to the INA+SENSE SMA
connector. The reason for this is hysteresis requires both a series input resistor and a feedback resistor from
output to input. There is no series resistance on the INA+ SMA connector. For this reason, the INA+SENSE
series resistor, R7, will act as the input resistor.
www.ti.com Board Setup
SNOU193 – MAY 2022
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TLV3602EVM User's Guide 9
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