LTC6945IUFDTRPBF Просмотр технического описания (PDF) - Linear Technology
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LTC6945IUFDTRPBF Datasheet PDF : 28 Pages
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LTC6945
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Supply Voltages
V+ (VREF+, VREFO+, VRF+, VVCO+, VD+) to GND ......3.6V
VCP+ to GND.........................................................5.5V
Voltage on CP Pin ................. GND – 0.3V to VCP+ + 0.3V
Voltage on All Other Pins ..........GND – 0.3V to V+ + 0.3V
Operating Case Temperature Range (TC)
(Note 2).................................................. –40°C to 105°C
Operating Junction Temperature........................... 125°C
Storage Temperature Range .................. –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
28 27 26 25 24 23
VREFO+ 1
22 VVCO+
REFO 2
21 GND
STAT 3
CS 4
SCLK 5
20 GND
29
19 GND
GND
18 GND
SDI 6
SDO 7
VD+ 8
9
17 GND
16 VCO+
15 VCO–
10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm w 5mm) PLASTIC QFN
TJMAX = 125°C, θJC = 7°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC6945IUFD#PBF
LTC6945IUFD#TRPBF 6945
28-Lead (4mm × 5mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
CASE TEMPERATURE RANGE
–40°C to 105°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TC = 25°C. VREF+ = VREF0+ = VD+ = VRF+ = VVCO+ = 3.3V, VCP+ = 5V unless otherwise
specified. All voltages are with respect to GND.
SYMBOL PARAMETER
Reference Inputs (REF+, REF–)
fREF
Input Frequency
VREF
Input Signal Level
Input Slew Rate
Input Duty Cycle
Self-Bias Voltage
Input Resistance
Input Capacitance
CONDITIONS
Single-Ended
Differential
Differential
MIN TYP MAX
l 10
250
l 0.5
2
3.3
l 20
50
l 1.65 1.85 2.25
l 6.2
8.4 11.6
3
UNITS
MHz
VP-P
V/μs
%
V
kΩ
pF
6945f
2
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