LTC2201_15 Datasheet, PDF (1/24 Pages) Linear Technology – 16-Bit, 20Msps ADC

LTC2201
16-Bit, 20Msps ADC
FEATURES
n _{Sample Rate: 20Msps}
n _{81.6dB SNR and 100dB SFDR (2.5V Range)}
n _{90dB SFDR 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: 211mW}
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^®2201 is a 20Msps, sampling 16-bit A/D converter
designed for digitizing high frequency, 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 LTC2201 is perfect for demanding applications, with
AC performance that includes 81.6dB SNR and 100dB
spurious free dynamic range (SFDR). Maximum DC specs
include ±5LSB 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.
TYPICAL APPLICATION
3.3V
SENSE
V_CM
2.2μF
1.25V
COMMON MODE
BIAS VOLTAGE
INTERNAL ADC
REFERENCE
GENERATOR
OV_DD
A_IN ⁺
ANALOG
INPUT
A_IN ^–
+
S/H
AMP
–
16-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC AND
SHIFT REGISTER
OUTPUT
DRIVERS
CLOCK/DUTY
CYCLE
CONTROL
OGND
V_DD
GND
CLK
PGA SHDN DITH MODE OE RAND
ADC CONTROL INPUTS
0.5V TO 3.6V
1μF
OF
CLKOUT+
CLKOUT–
D15
t
t
t
D0
CMOS
OUTPUTS
3.3V
1μF
1μF
1μF
2201 TA01
Integral Nonlinearity (INL)
vs Output Code
2.0
1.5
1.0
0.5
0.0
– 0.5
–1.0
–1.5
–2.0
0
16384
32768
CODE
49152 65536
2201 TA02
2201f
1