5

FN7438.1

October 30, 2008

Pin Descriptions

PIN

IN/OUT

DESCRIPTION

EQUIVALENT CIRCUIT

VINx-

Input

Amplifier x inverting input, where:

x = A for EL9200

x = A, B for EL9201

x = A, B, C, D for EL9202

VINx+

Input

Amplifier x non-inverting input, where:

x = A for EL9200

x = A, B for EL9201

x = A, B, C, D for EL9202

Reference Circuit 1

VS+

Supply

Op amp supply; bypass to GND with 0.1µF capacitor

VOUTX

Output

Amplifier X output, where:

x = A for EL9200

x = A, B for EL9201

x = A, B, C, D for EL9202

NC

-

No connect; not internally connected

GND

Supply

Ground connection

IOUT

Output

Adjustable sink current output pin; the current sinks into the

OUT pin is equal to the DAC setting times the maximum

adjustable sink current divided by 128; see SET pin function

description for the maxim adjustable sink current setting

SET

Output

Maximum sink current adjustment point; connect a resistor

from SET to GND to set the maximum adjustable sink

current of the OUT pin; the maximum adjustable sink

CE

Input

of the internal counter; connect CE to GND to inhibit

counting

CTL

Input

Internal counter up/down control and internal EEPROM

programming control input; if CE is high, a mid-to-low

transition increments the 7-bit counter, raising the DAC

setting, increasing the OUT sink current, and lowering the

divider voltage at OUT; a mid-to-high transition decrements

the 7-bit counter, lowering the DAC setting, decreasing the

OUT sink current, and increasing the divider voltage at

OUT; applying 4.9V and above with appropriately arranged

timing will overwrite EEPROM with the contents in the 7-bit

counter; see EEPROM Programming section for details

AVDD

Supply

Analog voltage supply; bypass to GND with 0.1µF

capacitor

VSD

Supply

System power supply input; bypass to GND with 0.1µF

capacitor

GND

CIRCUIT 1

GND

GND

CIRCUIT 2

EL9200, EL9201, EL9202