MAX16913 Datasheet, PDF (5/10 Pages) Maxim Integrated Products – Remote Antenna Current-Sense Amplifier and Switches

Remote Antenna Current-Sense
Amplifier and Switches
Pin Description
PIN
1, 8, 9, 16
2
3, 4
NAME
GND
IN
SENS
FUNCTION
Ground
Input Voltage. Bypass IN to GND with a low-ESR ceramic capacitor with a minimum value of 0.1µF.
Input to Current-Sense Amplifier. Connect the sense resistor between SENS and IN.
5, 6
OUT Switch Output
7
SHDN Active-High Control Input. Drive SHDN low to turn on the device.
10
N.C. No Connection. Not internally connected.
11
OLT
Open-Load Threshold Setting Input. A resistive divider between REF, OLT, and GND sets the open-load
current threshold (MAX16913A). For the MAX16913, connect OLT to GND.
12
REF
+3V Nominal Reference Output. Use a resistive divider between REF, OLT, and ground to set the open-load
current threshold (MAX16913A). The output impedance of this voltage regulator is 5kΩ.
13
AOUT
Current-Monitor Voltage Output. AOUT can be used to measure the load current by means of an external
ADC. The output impedance is 5kΩ.
14
OL
Open-Drain Open-Load Indicator Output. OL goes low when the load current is lower than the open-load
current threshold, or when there is a short-to-battery fault. Connect OL to a 10kΩ pullup resistor. See Table 1.
15
SC
Open-Drain Short-Circuit Indicator Output. SC goes low when the load current is greater than the short-circuit
current threshold or when there is a short-to-battery fault. Connect SC to a 10kΩ pullup resistor. See Table 1.
MAX16913 Functional Diagram
SENS
IN
SHDN
SC
OL
MAX16913
CURRENT
SENSE
FET
DRIVER AND
CONTROL
VREF
CHARGE
PUMP
OT
REF
VREF2
OUT
AOUT
REF
OLT
GND
MAX16913A Functional Diagram
SENS
IN
SHDN
SC
OL
MAX16913A
CURRENT
SENSE
FET
DRIVER AND
CONTROL
VREF
VREF2
CHARGE
PUMP
OT
REF
OUT
AOUT
REF
OLT
GND
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