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ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104

Part Number TMP7

Copyright © 2014 ABCircuits. Revised September 2014 Page 9 of 10

DC Electrical Characteristics

Symbol

Description

Min

Typical

Max

Units

Notes

Supply Voltage

3.3

5.25

V

Supply Current

20

mA

Note 1

High Output Level

V

Note 2

Low Output Voltage

0.75

V

Note 3

Input High Level

2.1

V

Input Low Level

0.8

V

High Level Source Current

10

mA

Note 2

Low Level Sink Current

25

mA

Note 3

Capacitive load

3.5

10

pF

Input leakage

1

nA

Pull Up Resistors On Inputs

4

5.6

8

k?

Note 1: Vdd=5VDC, all inputs and outputs open

Theory Of Operation

The TMP7 IC is a custom programmed microprocessor designed to monitor the analog voltage

on the TEMP input with a 12 bit A/D. The input is read 16 times and averaged. The value read is

converted to the desired scale and displayed on seven segment displays and sent to the serial

output.