TSM9938 TOUCHSTONE [Touchstone Semiconductor Inc], TSM9938 Datasheet - Page 10

• Manufacturer Part Number: TSM9938
• Description: A 1uA, SOT23 Precision Current-Sense Amplifier
• Manufacturer: TOUCHSTONE [Touchstone Semiconductor Inc]

TSM9938
RS+/RS- input pair of TSM9938 #2 is wired opposite
in polarity with respect to the RS+/RS- connections
of TSM9938 #1. Current-sense amplifier #1
therefore measures the discharge current and
current-sense amplifier #2 measures the charge
current. Note that both output voltages are
measured with respect to GND. When the discharge
current is being measured, V
is zero; for the case where charge current is being
measured, V
Page 10
OUT1
is zero, and V
OUT1
OUT2
is active and V
is active.
OUT2
PC Board Layout and Power-Supply Bypassing
For optimal circuit performance, the TSM9938
should be in very close proximity to the external
current-sense resistor and the pcb tracks from
RSENSE to the RS+ and the RS- input terminals of
the TSM9938 should be short and symmetric. Also
recommended are a ground plane and surface
mount resistors and capacitors.
TSM9938DS r1p0
RTFDS