mikroElektronika Current Click User manual

1. Introduction
Once you have soldered the headers your
board is ready to be placed into desired
mikroBUS™ socket. Make sure to align the
cut in the lower-right part of the board
with the markings on the silkscreen at the
mikroBUS™ socket. If all of the pins are
aligned correctly, push the board all
the way into the socket.
3. Plugging the board in
2 3
2. Soldering the headers
1
4. Essential features
Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder the
pins carefully.
Turn the board upside down so that
bottom side is facing you upwards. Place
shorter parts of the header pins in both
soldering pad locations.
Before using your click board™, make sure
to solder 1x8 male headers to both left
and right side of the board. Two 1x8 male
headers are included with the board in
the package.
click
BOARD
www.mikroe.com
Current click Manual
ver. 1.01
0 100000 023518
Current Click™ is an add-on board in
mikroBUS™form factor. It’s a compact and
easy solution for adding current measurement
in your design. It features INA196 current
shunt monitor, MCP3201 12-bit ADC,
MAX6106 voltage reference as well as two
screw terminals. Current Click™ communicates
with target board microcontroller via
mikroBUS™SPI (SDO, SCK, CS) and AN lines.
The board is designed to use either 3.3V or
5V power supply. LED diode indicates the
presence of power supply.
clickCurrent
Current Click™ board serves as the current
measurement device. It receives current from
output circuit connected to IN(+) and OUT(-)
pins of the rst screw terminal and via INA196
IC converts it into a voltage value. Second
screw terminal is used for external shunt. In
order to measure values of current in various
bands, you need to screw-on the shunt with
appropriate value. Four shunts with dierent
values are provided in the package.

8. Support
MikroElektronika oers Free Tech Support
(www.mikroe.com/esupport) until the
end of product lifetime, so if something goes
wrong, we are ready and willing to help!
7. Code Examples
.com
Once you have done all the necessary
preparations, it’s time to get your click
board up and running. We have provided
the examples for mikroC, mikroBasic and
mikroPascal compilers on our Libstock
website. Just download them and you are
ready to start.
5. Current Click™ Board Schematic
VCC
VCC
R1
2K2
LD1
C1 100nF
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
J1
PWR SEL
CN1
OUTVIN-
VIN+
CS#
SCK
SDO
1
2
3
OUT
GND
VIN- 5
4
V+ VIN+
U1
INA196
C2
100nF
VCCVCC
CN2
VIN+
VIN-
1
2
3
VIN
VOUT
VSS
REF1
MAX6106EUR+T
VCC
REF
R SHUNT
IN
C3
100nF
ADC
1
2
3
54
6
7
8
Vref
IN+
IN-
Vss CS
Dout
CLK
Vdd
U2
MCP3201
VCC
R7
10K
SDO
CS#
SCK
REF
VCC
VCCVCC
VIN+
VIN-
C4
100nF
C5
1uF
C6
1uF
J2
OUT
ADC
AN
AN
MIKROBUS DEVICE CONN.
MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document.
Specication and information contained in the present schematic are subject to change at any time without notice. Copyright © 2013 MikroElektronika. All rights reserved.
6. SMD Jumpers
The current Click™ board communicates with
the main board microcontroller via SPI interface
(using ADC) or via AN line (directly connected
to the microcontroller AN pin) depending on
the position of the J1 SMD jumper. This jumper
is soldered in ADC position. There is one zero-
ohm SMD jumper J1 used to select whether
3.3V or 5V power supply is used. Jumper J1 is
soldered in 3.3V position by default.
R
1
2
3
4
shunt
0.05
0.2
1
10
2048
512
102
10
400
100
20
2
[Ω]
I
max [mA]
I
min[mA]
*
*
R
shunt
I
max
I
min
The values of shunt resistor which are provided in the package
The values of maximal current that can be measured
-
-
-
The values of minimal current where the range is linear
The measured values can vary because of the screw terminal
resistance (≈ 0.0035Ω) and shunt resistors tolerance (±1%)