LTC2202_15 Datasheet, PDF (1/32 Pages) Linear Technology – 16-Bit, 25Msps/10Msps ADCs

LTC2203/LTC2202
16-Bit, 25Msps/10Msps ADCs
FEATURES
n _{Sample Rate: 25Msps/10Msps}
n _{81.6dB SNR and 100dB SFDR (2.5V Range)}
n _{SFDR 90dB at 70MHz (1.667VP-P Input Range)}
n _{PGA Front End (2.5VP-P or 1.667VP-P Input Range)}
n _{380MHz Full Power Bandwidth S/H}
n _{Optional Internal Dither}
n _{Optional Data Output Randomizer}
n _{Single 3.3V Supply}
n _{Power Dissipation: 220mW/140mW}
n _{Clock Duty Cycle Stabilizer}
n _{Out-of-Range Indicator}
n _{Pin Compatible Family}
25Msps: LTC2203 (16-Bit)
10Msps: LTC2202 (16-Bit)
n _{48-Pin (7mm × 7mm) QFN Package}
APPLICATIONS
n _{Telecommunications}
n _Receivers
n _{Cellular Base Stations}
n _{Spectrum Analysis}
n _{Imaging Systems}
n _ATE
DESCRIPTION
The LTC^®2203/LTC2202 are 25Msps/10Msps, sampling
16-bit A/D converters designed for digitizing high frequen-
cy, wide dynamic range signals with input frequencies up
to 380MHz. The input range of the ADC can be optimized
with the PGA front end.
The LTC2203/LTC2202 are perfect for demanding app-
lications, with AC performance that includes 81.6dB
SNR and 100dB spurious free dynamic range (SFDR).
Maximum DC specs include ±4LSB INL, ±1LSB DNL (no
missing codes).
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.6V.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high performance
at full speed with a wide range of clock duty cycles.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 4843302, 6949965B1.
TYPICAL APPLICATION
V_CM
2.2μF
1.25V
COMMON MODE
BIAS VOLTAGE
A_IN ⁺
ANALOG
INPUT
A_IN ^–
+
S/H
AMP
–
CLOCK/DUTY
CYCLE
CONTROL
CLK
3.3V
SENSE
INTERNAL ADC
REFERENCE
GENERATOR
OV_DD
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
OGND
V_DD
GND
PGA SHDN DITH MODE OE
ADC CONTROL INPUTS
RAND
0.5V TO 3.6V
1μF
OF
CLKOUT+
CLKOUT–
D15
•
•
•
D0
CMOS
OUTPUTS
3.3V
1μF
1μF
1μF
22032 TA01
LTC2203: 128K Point FFT,
f_IN = 5.1MHz, –1dBFS, PGA = 0
0
–10
–20
–30
– 40
– 50
– 60
–70
– 80
–90
–100
–110
–120
–130
–140
0 2 4 6 8 10 12
FREQUENCY(MHz)
22032 TA02
22032fd
1