LMP90100MHE National Semiconductor, LMP90100MHE Datasheet - Page 44

• Manufacturer Part Number: LMP90100MHE
• Description: AFE, SENSOR, 28TSSOP
• Manufacturer: National Semiconductor

Specifications of LMP90100MHE

• Brief Features: 24bit Low Power Sigma Delta ADC, Automatic Channel Sequencer
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +105°C
• Digital Ic Case Style: TSSOP
• No. Of Pins: 28
• Base: RoHS Compliant
• Ic Function: Multi-Channel, Low Power 24-bit Sensor AFE
• Rohs Compliant: Yes

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FIGURE 34. Topology #2: 3-wire RTD Using 1 Current Source
Figure 34
shows the second topology for a 3-wire RTD appli-
cation. Topology #2 shows the same connection as topology
#1, but without IB2. Although this topology eliminates a cur-
rent source, it requires two channel measurements as shown
in Equation 4.
Equation 4 — VIN Equation for Topology #2
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