ANALOG DEVICES DC2839A Demonstration Board, LTC6115, High Side, Voltage/Current Sense Amplifier

DC2839A is a demonstration circuit featuring the LTC®6115, high-voltage, high-side current sense circuit. This circuit measures inputs up to 100V and 2A. The board can be connected to Linduino® as a shield and has an accompanying Linduino sketch. The gain of the current sense channel may be set with jumpers to 5V/A (100V/V) or 2.5V/A (50V/V), and the gain of the voltage sense channel may be selected with jumpers for unity gain or 2V/V. The DC2839A includes a 4-terminal 50mohm sense resistor with a footprint for larger, higher-power rated parts. A 1:1000 resistor divider can be selected with jumpers to provide simulated mV-scale input difference voltages if high currents are not available. The voltage sense and current sense can be configured to measure the same input or separate inputs.

• Supply voltage range (V+) from 5 to 100V (current sense)
• 500mV min input sense voltage full-scale at Error < 1%, RIN = 1Kohm
• 1mA min value of maximum output current at ROUT = 2Kohm, VSENSE = 110mV, Gain = 20
• Supply voltage range from 2.7 to 5.5V guaranteed by PSRR test (voltage sense, VS = 5V)
• 100V VIN voltage at referred to GND (voltage sense, VS = 5V)
• ±0.15% max total gain error at VIN = 100V, no load