SBOS410K june 2007 – june 2023 REF5010 , REF5020 , REF5025 , REF5030 , REF5040 , REF5045 , REF5050
PRODUCTION DATA
The temperature output terminal (TEMP, pin 3) provides a temperature-dependent voltage output with approximately 60-kΩ source impedance. As illustrated in Figure 7-8, the output voltage follows the nominal relationship:
This pin indicates general chip temperature, accurate to approximately ±15°C. Although not generally suitable for accurate temperature measurements, this pin can be used to indicate temperature changes or for temperature compensation of analog circuitry. A temperature change of 30°C corresponds to an approximate 79-mV change in voltage at the TEMP pin.
The TEMP pin has high-output impedance (see Section 9.2). Loading this pin with a low-impedance circuit induces a measurement error; however, this pin does not have any effect on VOUT accuracy.
To avoid errors caused by low-impedance loading, buffer the TEMP pin output with a suitable low-temperature drift op amp, such as the OPA333, OPA335, or OPA376, as shown in Figure 9-1.