LTC2203 Datasheet, PDF (1/32 Pages) Linear Technology – 16-Bit, 25Msps/10Msps ADCs

LTC2203/LTC2202
16-Bit, 25Msps/10Msps ADCs
FEATURES
■ _{Sample Rate: 25Msps/10Msps}
■ _{81.6dB SNR and 100dB SFDR (2.5V Range)}
■ _{SFDR 90dB at 70MHz (1.667VP-P Input Range)}
■ _{PGA Front End (2.5VP-P or 1.667VP-P Input Range)}
■ _{380MHz Full Power Bandwidth S/H}
■ _{Optional Internal Dither}
■ _{Optional Data Output Randomizer}
■ _{Single 3.3V Supply}
■ _{Power Dissipation: 220mW/140mW}
■ _{Clock Duty Cycle Stabilizer}
■ _{Out-of-Range Indicator}
■ _{Pin Compatible Family}
25Msps: LTC2203 (16-Bit)
10Msps: LTC2202 (16-Bit)
■ _{48-Pin (7mm × 7mm) QFN Package}
U
APPLICATIO S
■ _{Telecommunications}
■ _Receivers
■ _{Cellular Base Stations}
■ _{Spectrum Analysis}
■ _{Imaging Systems}
■ _ATE
DESCRIPTIO
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 ap-
plications, 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.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All
other trademarks are the property of their respective owners. Protected by U.S. Patents
including 4843302 and 6949965B1
TYPICAL APPLICATIO
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
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OV_DD
OUTPUT
DRIVERS
OGND
V_DD
GND
0.5V TO 3.6V
1μF
OF
CLKOUT+
CLKOUT–
D15
•
•
•
D0
CMOS
OUTPUTS
3.3V
1μF
1μF
1μF
PGA SHDN DITH MODE OE
ADC CONTROL INPUTS
RAND
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 GO7
22032fb
1