STLM20

Description

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Description

The STLM20 is a precision analog output temperature sensor for low current applications

where maximizing battery life is important. It operates over a –55°C to 130°C (grade 7) or

–40°C to 85°C (grade 9) temperature range. The power supply operating range is 2.4V to

5.5V. The accuracy of the STLM20 is ± 1.5°C, at an ambient temperature of 25°C. The

temperature error increases linearly and reaches a maximum of ±2.5°C at the temperature

range extremes. The temperature range is affected by the power supply voltage. For the

temperature grade 7 device, a power supply voltage of 2.7V to 5.5V, the temperature range

extremes are +130°C and –55°C. Decreasing the power supply voltage to 2.4V changes the

negative extreme to –30°C, while the positive remains at +130°C.

The STLM20 has a maximum quiescent supply current of 8µA. Therefore, self-heating is

negligible.

Figure 1.

Logic diagram

1.

Pin 2 GND may be grounded or left floating (SC70-5 only). For optimum thermal conductivity to the PC

board ground plane, it should be grounded.

Figure 2.

Connections (top view)

1.

Pin 1 NC should be left floating or grounded.

2.

Pin 2 GND may be grounded or left floating. For optimum thermal conductivity to the PC board ground

plane, it should be grounded.

Table 1.

Signal names

Supply voltage

GND

Ground

Output voltage

NC

No connect

AI12252

VCC

STLM20

VOUT

1

VCC

GND(2)

NC(1)

GND

VOUT

AI12253

2

3

5

4

SOT323-5(SC70-5)

1

VCC

NC(1)

GND

VOUT

AI12253_a

2

4

3

UDFN-4Lead