More detailed image (GIF)

Figure 1. The Monterey subsystem design block diagram.

Features

Ultra-low power

-100°C to +100°C interval

High accuracy

High precision

Simple power supply and wide input range

System current consumption less than 2.1mA

Resistance temperature detector (RTD) PT1000

Resolution 10,000 counts or 0.1%

Accuracy 0.25%

Equipment Required

10V to 40V power supply

High-accuracy current meter

RTD PT1000 sensor or a temperature calibrator

Quick Start

Connect an industrial standard power supply across LOOP+ and LOOP- terminals of J1 to power up the board.

Connect the sensor across J3. The current design of the board is configured for 2-wire RTD application. Minor modifications at the

sensor side can be performed to use a 3/4-wire RTD application.

Jumper Descriptions

Table 1. Connector Description and Default Jumper Positions

Jumper

Default Position

Function

J1

Installed

Power pin for Monterey Board. Connect across LOOP+ and LOOP- for power.

J2

Installed

J3

Installed

Connect RTD across IN+ and IN-.

J4

Installed across pins

1 and 2

Using a jumper across pins 1 and 2 of J4 uses the MAX44248. This case is used to gain the

input signal.

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