Avago Technologies ACPL-C870-000E - Manual

EVBD-ACPL-C87B/C87A/C870
Isolated Voltage Sensor Evaluation Board
User Guide
Features
• User-configurable voltage sensing range up to 1230 V
• Single 5 V supply or dual supply up to ±15 V
• Onboard offset calibration
• Onboard isolated 5 V power supply for high voltage
side
• User-controllable shutdown
Voltage Sensor Applications
• Isolated voltage sensing in AC and servo motor drives
• Isolated DC-bus voltage sensing in solar inverters, wind
turbine inverters
• Isolated sensor interfaces
• Signal Isolation in data acquisition systems
• General purpose voltage isolation
Figure 2. The ACPL-C87x evaluation board (bottom view)
Figure 1. The ACPL-C87x evaluation board (top view)
Board Description
The ACPL-C87x evaluation board (see Figure 1 and Fig-
ure 2) is designed to support the evaluation of the AC-
PL-C87x precision optically isolated voltage sensors. The
ACPL-C87x series is available in three choices: ACPL-C87B
(±0.5% gain tolerance), ACPL-C79A (±1% gain tolerance)
and ACPL-C790 (±3% gain tolerance). Featuring 2 V [1] in-
put range and 1 G Ω high input impedance, these isolation
amplifiers are specifically designed for voltage sensing in
electronic power converters applications, including motor
drives and renewable energy systems. The ACPL-C87x is
identified as U1 on the evaluation board.
On the input side of the evaluation board, power terminals
P1 and P2 are provided for incoming voltage connection.
This voltage is required to scale down to suit the input
range of the voltage senor. This can be achieved by choos-
ing appropriate resistors and mount on the footprints pro-
vided for R1 through R3. On the output side of the evalu-
ation board, header connector P7 provides a connection
port for power supply to the board and signal interface
with next stage such as an analog to digital converter or a
signal processing and control device.
Note:
1. The ACPL-C87x data sheet specifies 2 V as the nominal input range.
Full scale input range (FSR) is 2.46 V.