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Connector Functions
Connector
SENSOR IN
0:7
SENSOR IN
8:15
SENSOR
OUT 0:7
SENSOR
OUT 8:15
Board Set Up
1. Make sure the link and switch positions are as listed in the tables above. Connect a 3.3V
supply to the Vlogic test point. The VDD link connects power from VLogic to the HI‐8470 VDD
pin, which supplies the internal converter. The Vlogic jumper supplies only the LED.
2. To measure the device's Vlogic supply current; remove the Vlogic GND jumper and connect
an ammeter across the jumper pins. This measures only the device current and not the other
circuitry on the board. To measure Vdd current, remove the Vdd jumper and connect the
ammeter across the jumper pins. Remove the XTAL VDD link; the current measured will be
for the device 'unclocked'. To measure the device clocked current consumption, an external
1MHz clock should be used, connected to the CLK test point, after removing the EXTCLK link.
AN‐8470, Rev. A
PIN
1 to 8
Sensor inputs; Sensor 0:7 → Pins 1:8
9
GND
1 to 8
Sensor inputs; Sensor 8:15 → Pins 1:8
9
GND
1 to 8
Sensor outputs; Sensor 0:7 → Pins 1:8
9
GND
1 to 8
Sensor outputs; Sensor 8:15 → Pins 1:8
9
GND
HOLT INTEGRATED CIRCUITS
DESCRIPTION
6
3/2/15
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