STLM20W89(2007) データシートの表示（PDF） - STMicroelectronics

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STLM20W89
(Rev.:2007)

Ultra-low current 2.4V precision analog temperature senso

STMicroelectronics 

STLM20

1

Description

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

VCC

STLM20

VOUT

GND(1)

AI12252

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.

Table 1.

VCC

GND

VOUT

NC

Signal names

Supply voltage

Ground

Output voltage

No connect

Figure 2. Connections (top view)

NC(1) 1

GND(2) 2

VOUT 3

5 GND

4 VCC

AI12253

SOT323-5(SC70-5)

VOUT 1

4 VCC

NC(1)

2

3 GND

AI12253_a

UDFN-4Lead

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.

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