LTC2274 Linear Technology, LTC2274 Datasheet

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LTC2274

Manufacturer Part Number
LTC2274
Description
105Msps Serial Output ADC
Manufacturer
Linear Technology
Datasheet

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FEATURES
APPLICATIONS
2.2μF
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TYPICAL APPLICATION
ANALOG
INPUT
A
A
V
High Speed Serial Interface (JESD204)
Sample Rate: 105Msps
77.7dBFS Noise Floor
100dB SFDR
SFDR >82dB at 250MHz (1.5V
PGA Front End (2.25V
700MHz Full Power Bandwidth S/H
Optional Internal Dither
Single 3.3V Supply
Power Dissipation: 1300mW
Clock Duty Cycle Stabilizer
Pin Compatible Family
40-Pin 6mm × 6mm QFN Package
Telecommunications
Receivers
Cellular Base Stations
Spectrum Analysis
Imaging Systems
ATE
IN
IN
CM
+
105Msps: LTC2274
80Msps: LTC2273
65Msps: LTC2272
COMMON MODE
+
ENC
CLOCK/DUTY
BIAS VOLTAGE
CONTROL
AMP
S/H
CYCLE
+
1.25V
ENC
CLOCK
PGA
DITH
INTERNAL ADC
GENERATOR
REFERENCE
PIPELINED
ADC CORE
16-BIT
MSBINV
3.3V
SENSE
P-P
SHDN
or 1.5V
CORRECTION
LOGIC
P-P
PAT1 PAT0
P-P
SCRAMBLER/
GENERATOR
Input Range)
ENCODER
PATTERN
8B/10B
16
FAM
Input Range)
SCRAM
20
SRR1 SRR0
SERIALIZER
PLL
20X
GND
SYNC
SYNC
OV
CMLOUT
CMLOUT
V
DD
DD
DESCRIPTION
The LTC
a high speed serial interface. It is designed for digitizing
high frequency, wide dynamic range signals with an input
bandwidth of 700MHz. The input range of the ADC can
be optimized using the PGA front end. The output data is
serialized according to the JEDEC Serial Interface for Data
Converters specifi cation (JESD204).
The LTC2274 is perfect for demanding applications where
it is desirable to isolate the sensitive analog circuits from
the noisy digital logic. The AC performance includes a
77.7dB Noise Floor and 100dB spurious free dynamic range
(SFDR). Ultra low internal jitter of 80fs RMS allows under-
sampling of high input frequencies with excellent noise
performance. Maximum DC specs include ±4.5LSB INL
and ±1LSB DNL (no missing codes) over temperature.
The encode clock inputs, ENC
differentially or single-ended with a sine wave, PECL,
LVDS, TTL or CMOS inputs. A clock duty cycle stabilizer
allows high performance at full speed with a wide range
of clock duty cycles.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
0.1μF
+
1.2V TO 3.3V
0.1μF
+
3.3V
0.1μF
®
2274 is a 105Msps, 16-bit A/D converter with
50Ω
16-Bit, 105Msps Serial
ASIC OR FPGA
50Ω
+
RECEIVER
SERIAL
2274 TA01
–100
–110
–120
–130
–10
–20
–30
–40
–50
–60
–70
–80
–90
Output ADC
+
128k Point FFT, f
0
and ENC
0
10
–1dBFS, PGA = 0
FREQUENCY (MHz)
LTC2274
20
, may be driven
30
IN
= 4.93MHz,
40
2274 TA01b
1
50
2274f

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