GND

OUT

Input

Pin

LMT87

Reset

Sample

Simplified Input Circuit of

SAR Analog-to-Digital Converter

+2.7V to +5.5V

OUT

LMT87

GND

OPTIONAL

BYPASS

CAPACITANCE

LMT87, LMT87-Q1

SNIS170C – JAN 2014 – REVISED OCTOBER 2015

www.ti.com

Device Functional Modes (continued)

Figure 11. LMT87 with Series Resistor for Capacitive Loading Greater than 1100 pF

1.1 nF to 99 nF

3 k

Ω

100 nF to 999 nF

1.5 k

Ω

1

μF

800

Ω

8.4.4 Output Voltage Shift

The LMT87 and LMT87-Q1 is very linear over temperature and supply voltage range. Due to the intrinsic

behavior of an NMOS/PMOS rail-to-rail buffer, a slight shift in the output can occur when the supply voltage is

ramped over the operating range of the device. The location of the shift is determined by the relative levels of

specifications in the Accuracy Characteristics table already include this possible shift.

9 Application and Implementation

9.1 Application Information

The LMT87/LMT87-Q1 features make it suitable for many general temperature sensing applications. It can

operate down to 2.7-V supply with 5.4-µA power consumption. Package options including through-hole TO-92

package also allows the LMT87 to be mounted on-board, off-board, to a heat sink, or on multiple unique

locations in the same application.

9.2 Typical Applications

9.2.1 Connection to ADC

Figure 12. Suggested Connection to a Sampling Analog-to-Digital Converter Input Stage

12

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