National Semiconductor INA260, Руководство пользователя

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INA260EVM-PDK Hardware
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12 SBOU180 – November 2016
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INA260EVM-PDK and Software Tutorial
2.3 EVM Digital Inputs and Outputs
The only digital input signals required to operate the INA260 are the 2-bit I
2
C device address (A[1:0]),
serial clock (SCL), and serial data (SDA), which is a bidirectional pin and thus also an output. The device
address bits can each assume one of four values: GND, V
S
, SDA or SCL, resulting in 16 possible slave
addresses summarized in Table 4 . The values of A0 and A1 must be set using jumpers J2 and J3,
respectively.
Table 4. INA260 I
2
C Address Configuration
A1 A0 Slave Address
GND GND 1000000
GND V
S+
1000001
GND SDA 1000010
GND SCL 1000011
V
S+
GND 1000100
V
S+
V
S+
1000101
V
S+
SDA 1000110
V
S+
SCL 1000111
SDA GND 1001000
SDA V
S+
1001001
SDA SDA 1001010
SDA SCL 1001011
SCL GND 1001100
SCL V
S+
1001101
SCL SDA 1001110
SCL SCL 1001111
SCL and SDA are driven by the SM-USB-DIG via J4. These are open-drain inputs and the EVM contains
pullup resistors to drive these inputs high when the corresponding SM-USB-DIG digital outputs are in tri-
state. Both fast (1 kHz to 400 kHz) and high-speed (1 kHz to 2.94 MHz) I
2
C modes are supported.
The outputs of the INA260 include SDA and ALERT, both of which are routed to J4 and are readable from
the GUI. The GUI includes support for both over- and underlimit as well as conversion ready indicator
modes of the ALERT pin. The state of the ALERT pin can be read from either the GUI or the onboard LED
indicator.
3 INA260EVM-PDK Setup
CAUTION
Components of the INA260EVM-PDK are susceptible to damage by
electrostatic discharge (ESD). Customers are advised to observe proper ESD
handling precautions when unpacking and handling the EVM, including the use
of a grounded wrist strap at an approved ESD workstation.
Setting up the INA260EVM-PDK involves the following sequence of operations:
1. Perform a one-time GUI software installation
2. Configure the EVM jumpers
3. Connect the hardware
4. Power-up the EVM and input source