DK-MAXII-1270N Altera, DK-MAXII-1270N Datasheet - Page 15

• Manufacturer Part Number: DK-MAXII-1270N
• Description: KIT DEV MAXII W/EPM 1270N
• Manufacturer: Altera
• Series: MAX® IIr
• Type: CPLDr

Specifications of DK-MAXII-1270N

• Contents: Dev Board, Quartus®II Web Edition, Nios®II Web Edition, Cables, Accessories, Reference Designs and Demos
• Silicon Manufacturer: Altera
• Core Architecture: CPLD
• Core Sub-architecture: MAX
• Silicon Core Number: EPM
• Silicon Family Name: MAX II
• Rohs Compliant: Yes
• For Use With/related Products: MAX®II CPLDs
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2380

Altera Corporation
Current Sensor Amplifier
You measure current to the MAX II development board by using an
on-board Maxim MAX4072 high-side current sense amplifier with a pair
of 0.33-Ω resistors in parallel as the sensing element. This has a maximum
voltage drop of 41 mV at 250 mA. At high current levels, the resolution
with an 8-bit converter is roughly 1 mA.
The current sensor is located upstream from the regulators for the V
and V
all of the current of the MAX II development board. The output of the
Maxim MAX4072 amplifier feeds the analog-to-digital converter (ADC).
See
the MAX II device.
The current drawn by the MAX II device can also be determined by
measuring the voltage across R109 or R113 (for V
(for V
is 0.165 Ω.
Table 15
LCD_DB7
LCD_E
LCD_RS
LCD_RW
Board References
Part Number
Device Description
Manufacturer
Manufacturer Web Site
Table 14. LCD Pin-Outs (Part 2 of 2)
Table 15. Current Sensor Reference
“Analog/Digital Converter” on page
I
I
VCCINT
VCCIO
CCIO
CCIO
Signal Name
describes the current sensor.
). The resistance value from the two 0.33-Ω resistors in parallel
voltages so that only one of the voltages is required to measure
= (V
= (V
R95
Item
R109
/0.165) = (V
/0.165) = (V
Data Bus
Enable
Data/Instruction Select
Read/Write Select
R99
Description
R113
/0.165)
/0.165)
U19, U23
MAX4072AUA
Current Sense Amplifier
Maxim
www.maxim-ic.com
16. The output of the ADC feeds
Description
CCINT
Board Components
) and R95 or R99
MAX II Pin
A10
C11
D11
A8
Preliminary
CCINT
15