DC1338A Datasheet, PDF(3/6 Page) Linear Technology – LTC2990 I2C Temperature Voltage and Current Monitor

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DC1338A Datasheet, PDF (3/6 Pages) Linear Technology – LTC2990 I2C Temperature Voltage and Current Monitor

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DEMO MANUAL DC1338A

HARDWARE SETUP

Connection to DC590 Serial Controller

J1 is the power and digital interface connector. Connect

to DC590 serial controller with supplied 14 conductor

ribbon cable.

Jumper Settings

V1, V2, V3, V4: These jumpers can be toggled between

VOLT and TEMP. VOLT connects the corresponding input

on the LTC2990 with the corresponding turret for an exter-

nal input. TEMP connects the corresponding input to the

onboard FMMT3904 (V3 and V4) or the FMMT3906 (V1

and V2). Please note that the jumpers should be moved in

pairs, V1 and V2 should both be connected either to VOLT

or TEMP and V3 and V4 should also be both connected

to either VOLT or TEMP. Once set, the proper selection

should also be made inside the QuikEval software in the

mode box to reflect any changes made.

VCC: EXT allows the LTC2990 to be powered from an ex-

ternal supply of 2.9V to 5.5V, connected to the VCC EXT

and GND turrets. If set to INT, the LTC2990 is powered

by the attached DC590B.

ADR0, ADR1: These jumpers are used to select the I2C

address for the LTC2990. When used with QuikEval, the

correct address should also be selected from within the

software.

Analog Connections

Analog signal connections are made at turrets V1, V2, V3

and V4. Single-ended input range is 0 to VCC, differential

is Â±300mV with a common mode range of 0 to VCC. When

connecting the board to an existing circuit the exposed

ground planes along the edges of the board may be used

to form a solid connection between grounds.

GND (2 locations): This turret is connected directly to the

internal ground planes.

VCC EXT: This turret allows the user to provide VCC to the

LTC2990. (2.9V to 5.5V)

V1, V2, V3, V4: These turrets are used to provide input

voltage to the monitor when the corresponding jumpers

are set to the VOLT position.

V+: Unregulated 10V coming from the DC590B. Turret

provided for testing purposes only. Presence of 10V

indicates proper connection of DC590B.

dc1338af

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