Analog Devices LINEAR DC2620A-A Demo Manual

DESCRIPTION
Demonstration circuit 2620A-A uses the LTC7106EDDB,
a precision, bidirectional, 7-Bit current DAC with PMBus
interface and can be used to adjust the output voltage of
any conventional V referenced regulator. The LTC7106
FB
can work with the vast majority of power management
controllers, regulators or modules to enable digital control
of the output voltage.
The DC2620A-A requires input voltage range from 2.5V
to 5.5V, which can be powered either by external supply
or directly from the DC1613A dongle. The LTC7106 pro-
vides three ranges of IDAC output current: Nominal Range
(–64µA to 63µA), Range High (–256µA to 252µA) and
Range Low (–16µA to 15.75µA). Only the nominal range
is optimized with the highest accuracy. It is recommended
that users design the resistor divider using the nominal
range of the IDAC setting.
PERFORMANCE SUMMARY
SYMBOL PARAMETER
V IC Bias Voltage
DD
V I Operation Voltage
IDAC DAC
I Output Current Range
DAC
A I Accuracy
CC DAC
DEMO MANUAL DC2620A-A
A 7-Bit Current DAC with
To explore the power system management features of the
parts, download the GUI software LTpowerPlay
PC and use ADI's I
to connect to the board. LTpowerPlay allows the user to
reconfigure the part on-the-fly, view IDAC current value
and fault status.
GUI Download
The software can be downloaded from:
http://www.linear.com/LTpowerPlay
For more details and instructions of LTpowerPlay, please
refer to LTpowerPlay for LTC7106 Quick Start Guide.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2620A-A
All registered trademarks and trademarks are the property of their respective owners.
Specifications are at T
A
CONDITIONS
Nominal, LSB = 1µA
Range High, LSB = 4µA
Range Low, LSB = 0.25µA
Nominal Range
LTC7106EDDB
Digital PMBus Interface
2
C/SMBus/PMBus Dongle DC1613A
= 25°C
MIN TYP
2.5
0.4
–64
–256
–16
–1.5
onto your
®
MAX UNITS
5.5 V
2.0 V
63 µA
252 µA
15.75 µA
0.8 %
dc2620aaf
1