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Linear Technology Electronic Components Datasheet

LTC2285IUP Datasheet

125Msps Low Power 3V ADC

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FEATURES
n Integrated Dual 14-Bit ADCs
n Sample Rate: 125Msps
n Single 3V Supply (2.85V to 3.4V)
n Low Power: 790mW
n 72.4dB SNR, 88dB SFDR
n 110dB Channel Isolation at 100MHz
n Flexible Input: 1VP-P to 2VP-P Range
n 640MHz Full Power Bandwidth S/H
n Clock Duty Cycle Stabilizer
n Shutdown and Nap Modes
n Data Ready Output Clock
n Pin Compatible Family
125Msps: LTC2283 (12-Bit), LTC2285 (14-Bit)
105Msps: LTC2282 (12-Bit), LTC2284 (14-Bit)
80Msps: LTC2294 (12-Bit), LTC2299 (14-Bit)
65Msps: LTC2293 (12-Bit), LTC2298 (14-Bit)
40Msps: LTC2292 (12-Bit), LTC2297 (14-Bit)
n 64-Pin (9mm × 9mm) QFN Package
APPLICATIONS
n Wireless and Wired Broadband Communication
n Imaging Systems
n Spectral Analysis
n Portable Instrumentation
LTC2285
Dual 14-Bit, 125Msps
Low Power 3V ADC
DESCRIPTION
The LTC®2285 is a 14-bit 125Msps, low power dual 3V
A/D converter designed for digitizing high frequency,
wide dynamic range signals. The LTC2285 is perfect for
demanding imaging and communications applications
with AC performance that includes 72.2dB SNR and 82dB
SFDR for signals at the Nyquist frequency.
Typical DC specs include ±1.5LSB INL, ±0.6LSB DNL. The
transition noise is a low 1.3LSBRMS.
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic.
A single-ended CLK input controls converter operation.
An optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
A data ready output clock (CLKOUT) can be used to latch
the output data.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
ANALOG
INPUT A
+
INPUT
S/H
14-BIT
PIPELINED
ADC CORE
CLK A
CLK B
CLOCK/DUTY CYCLE
CONTROL
CLOCK/DUTY CYCLE
CONTROL
ANALOG
INPUT B
+
INPUT
S/H
14-BIT
PIPELINED
ADC CORE
OUTPUT
DRIVERS
OVDD
D13A
•••
D0A
OGND
OF
MUX
CLKOUT
OUTPUT
DRIVERS
OVDD
D13B
•••
D0B
OGND
2285 TA01
SNR vs Input Frequency,
–1dB, 2V Range
75
74
73
72
71
70
69
68
67
66
65
0
50 100 150 200 250 300 350
INPUT FREQUENCY (MHz) 2285 TA01b
2285fb
1


Linear Technology Electronic Components Datasheet

LTC2285IUP Datasheet

125Msps Low Power 3V ADC

No Preview Available !

LTC2285
ABSOLUTE MAXIMUM RATINGS
OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) ..................................................4V
Digital Output Ground Voltage (OGND)........ –0.3V to 1V
Analog Input Voltage (Note 3).......–0.3V to (VDD + 0.3V)
Digital Input Voltage......................–0.3V to (VDD + 0.3V)
Digital Output Voltage ................ –0.3V to (OVDD + 0.3V)
Power Dissipation .............................................1500mW
Operating Temperature Range
LTC2285C ................................................ 0°C to 70°C
LTC2285I.............................................. –40°C to 85°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
AINA+ 1
AINA– 2
REFHA 3
REFHA 4
REFLA 5
REFLA 6
VDD 7
CLKA 8
CLKB 9
65
VDD 10
REFLB 11
REFLB 12
REFHB 13
REFHB 14
AINB– 15
AINB+ 16
48 DA7
47 DA6
46 DA5
45 DA4
44 DA3
43 DA2
42 DA1
41 DA0
40 CLKOUT
39 DB13
38 DB12
37 DB11
36 DB10
35 DB9
34 DB8
33 DB7
UP PACKAGE
64-LEAD (9mm × 9mm) PLASTIC QFN
TJMAX = 150°C, θJA = 20°C/W
EXPOSED PAD (PIN 65) IS GND AND MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2285CUP#PBF
LTC2285CUP#TRPBF LTC2285UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2285IUP#PBF
LTC2285IUP#TRPBF
LTC2285UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC2285CUP
LTC2285CUP#TR
LTC2285UP
64-Lead (9mm × 9mm) Plastic QFN
0°C to 70°C
LTC2285IUP
LTC2285IUP#TR
LTC2285UP
64-Lead (9mm × 9mm) Plastic QFN
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
CONVERTER CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
Resolution (No Missing Codes)
14
Bits
Integral Linearity Error
Differential Analog Input (Note 5)
±1.5
LSB
Differential Linearity Error
Differential Analog Input
–1 ±0.6 1.1
LSB
Offset Error
(Note 6)
–12 ±2
12
mV
Gain Error
External Reference
–2.5 ±0.5 2.5
%FS
Offset Drift
±10
μV/°C
Full-Scale Drift
Internal Reference
±30
ppm/°C
External Reference
±5
ppm/°C
2285fb
2


Part Number LTC2285IUP
Description 125Msps Low Power 3V ADC
Maker Linear Technology
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