QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 600
EVALUATION CARD FOR THE LTC1540 IN THE DFN PACKAGE
LTC1540CDD
DESCRIPTION
Demonstration circuit 600 simplifies the evaluation of
the LTC1540CDD comparator in the tiny, 3mm
×
3mm,
DFN (
D
ual in-line,
F
lat,
N
o-leads) chip-scale package.
Electrical performance of this LTC1540 is the same as
previous versions. This version is only a packaging en-
hancement.
An evaluation circuit can easily be built on this board
without handling the tiny DFN device. Pads are provided
for adding external components and holes are available
for jumpers, signal I/O and supply wires. Supply bypass
capacitors are already on the board. Alternatively adding
two 4-pin headers (0.1" spacing) converts the board to a
standard 8-pin DIP format for use with a socket on a
second circuit board.
The backside of this evaluation board is void of metal to
allow wiring into an existing system with the board rest-
ing on top of other components.
About the LTC1540CDD
The LTC1540 is a Nano-power Voltage Comparator with
a Built In Voltage Reference
Ultra-low Quiescent Current of only 300nA
1.2V, 2% Tolerance Voltage Reference
Adjustable Hysteresis
50
µ
sec Propagation Delay
Input Voltage Range From V
-
to V
+
-1.3V
Output Sources 40mA
Total Supply Voltage Range: 2V to 11V
Table 1.
Typical Performance Summary (Single 3V Supply, T
A
=25
°
C) Visit www.linear.com for complete data sheet.
PARAMETER CONDITION VALUE
Supply Current 280nA
Offset Voltage 12mV
Input Bias Current
±
10pA
Propagation Delay 10mV Overdrive
100mV overdrive
70
µ
sec
60
µ
sec
Output Swing Voltage from Either Supply Rail 400mV
Reference Voltage 1.182V
Device Top Mark Identifier: LAAS
1
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