FM50

PRODUCT SPECIFICATION

4

REV. 1.1.0 10/5/04

Typical Performance Characteristics

Figure 1. Accuracy vs. Temperature

Figure 2. Typical IDD versus Temperature

Figure 3. Typical Sensitivity to Supply Voltage

-4.0

-3.0

-2.0

-1.0

0.0

1.0

2.0

3.0

4.0

-50

150

50

0

100

upper spec limit

lower spec limit

Temperature (°C)

-1.0

0.0

1.0

2.0

3.0

4.0

5.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

VDD Volts

0.0

20.0

40.0

60.0

80.0

100.0

120.0

140.0

-50

-30

-10

10

30

50

70

90

110

130

Temperature (

°C)

Description

Within the FM50 are a thermal diode, calibration circuits

and amplifiers. Since the FM50 is calibrated at 33°C,

the nominal output in mV is:

where T is the thermal junction temperature expressed in °C.

At 33°C, the tolerances are as follows:

1.

Offset is ±3mV

2.

Slope, ±0.3mV/°C

These values accommodate the specified accuracies at -40,

25 and +125°C.

Output structure of the FM50 is an n-channel CMOS transis-

tor driving a p-channel load. Available current is typically 50

µA to ground. Series resistance is typically 7 k

Ω, charging

and 2 k

Ω, discharging through a capacitor connected from

following a delay of approximately 80 msec.

V

OUT

830

10

T

33

–

()

•

+

=