ADT7461ARMZ-R7

The AD5560 DPS covers the voltage supply and the measuring functions that the DUT needs, but to complete the rest of the circuit, there are a few more components required: a reference voltage, an ADC to digitize the measured result, and a thermal monitor to measure the temperature of the internal sense diodes, allowing users to view the thermal gradient across the die or, alternatively, across their PC board. The ADC is used to digitize the measurement output. The measurement output (MEASOUT pin) can deliver different output ranges, depending on the voltage reference and on where the OFFSET DAC is set. The OFFSET DAC is what is used to offset the Force Voltage output range to achieve different output ranges. The particular output range we are concerned about here is 0 V to 25 V. As a result, the default MEASOUT output range (MEASOUT GAIN = 1) will also be 0 V to 25 V. There are no ADCs with input ranges that can handle this directly, so there needs to be some external signal conditioning to match this range to that of any bipolar or unipolar ADC. There is an alternative MEASOUT setting (MEASOUT GAIN = 0.2), which scales and offsets the MEASOUT output range to 0 V to 5.125 V. (Some slight overrange is included here for calibration, etc.)

On-Chip and Remote Temperature Sensor 0.25°C Resolution/1°C Accuracy on Remote Channel 1°C Resolution/3°C Accuracy on Local Channel Automatically Cancels Up to 3 k (Typ) of Resistance in Series with Remote Diode to Allow Noise Filtering Extended, Switchable Temperature Measurement Range 0°C to +127°C (Default) or -55°C to +150°C Pin- and Register-Compatible with the ADM1032 2-wire SMBus Serial Interface with SMBus Alert Support Two SMBus Address Versions Available: ADT7461 SMBus Address is 0x4C ADT7461-2 SMBus Address is 0x4D Programmable Over/Under temperature Limits Offset Registers for System Calibration Up to Two Over temperature Fail-Safe THERM Outputs Small 8-lead SOIC NB or 8-lead MSOP Packages 170 A Operating Current, 5.5 A Standby Current These are Pb-Free Devices