Getting Started
4
SBOU175 – October 2019
Copyright © 2019, Texas Instruments Incorporated
OPA462EVM
2
Getting Started
This section explains the connectors and jumpers, and details the basic EVM functionality.
2.1
Power Supplies
The OPA462EVM can be configured from ±6 V to ±90 V for dual supply operation, or from 12 V to 180 V
for single-supply operation. Shorting pins 2 and 3 of J5 sets the EVM to single supply, and shorting pins 1
and 2 of J5 sets up the EVM for dual supplies. The OPA462 is capable of sourcing or sinking up to 30 mA
of current. Power is provided to the EVM through J2 (V+) and J1 (V–). Take care to select supplies
capable of providing the required power for the application. Use a supply capable of supplying at least
twice the anticipated current at the intended operating voltage.
2.2
Jumpers
There are six jumpers located on the OPA462EVM. The jumper functions are summarized in
Table 2. Jumper Table
Jumper
Function
J3
Enable or disable (E/D) common configuration
J4
Enable or disable (internal or external)
J5
Sets the negative supply to GND for single-supply operation.
J7
Selects inverting input (external or GND)
J10
Selects noninverting input (external or GND)
J12
Sets the reference voltage at the noninverting pin
2.3
Inputs
The inputs to the EVM can be any signal within the common-mode voltage range. BNC connectors are
available at both inputs to allow for easy interfacing with signal generators or other equipment.
Additionally, signals can be input using test points TP12 (IN–) and TP14 (IN+).
Jumpers J7 and J10 set the voltages seen at IN– and IN+, respectively. Short pins 2 and 3 of these
jumpers to set the inputs to GND. Short pins 1 and 2 to allow whatever voltages present at the input BNCs
to be passed to the op amp.
2.4
Outputs
The output of the EVM can be monitored from TP13. A BNC connector, J8, and terminal block, J11, are
also provided to interface with other equipment or circuits. The EVM includes footprints for a load resistor,
load capacitor, and an RC snubber network. If significant power is going to be driven into the load, use
external loads.
2.5
Enable or Disable (E/D)
The OPA462 incorporates a disable feature that can be set using jumpers J3 and J4 on the EVM. The
disable is accomplished without disturbing the input signal path, which helps save power in addition to
protecting the load. Jumper J3 sets the voltage of the E/D Com pin, which can be set to either the
negative rail or GND. The voltage at the E/D Com pin serves as the reference voltage for the E/D pin. J4
sets the voltage at the E/D pin. The device is enabled by floating the E/D pin, or by forcing the E/D pin
high using an external voltage. If forcing the E/D pin high, the pin must be pulled at least 2.5 V greater
than the E/D Com pin, but should not be pulled any more than 5 V greater than the E/D Com pin. Shorting
the E/D pin to the E/D Com pin disables the device.
