LTC2241-12 Datasheet, PDF (1/28 Pages) Linear Technology – 12-Bit, 210Msps ADC

LTC2241-12
12-Bit, 210Msps ADC
FEATURES
■ _{Sample Rate: 210Msps}
■ _{65.5dB SNR}
■ _{78dB SFDR}
■ _{1.2GHz Full Power Bandwidth S/H}
■ _{Single 2.5V Supply}
■ _{Low Power Dissipation: 585mW}
■ _{LVDS, CMOS, or Demultiplexed CMOS Outputs}
■ _{Selectable Input Ranges: ±0.5V or ±1V}
■ _{No Missing Codes}
■ _{Optional Clock Duty Cycle Stabilizer}
■ _{Shutdown and Nap Modes}
■ _{Data Ready Output Clock}
■ _{Pin Compatible Family}
250Msps: LTC2242-12 (12-Bit), LTC2242-10 (10-Bit)
210Msps: LTC2241-12 (12-Bit), LTC2241-10 (10-Bit)
170Msps: LTC2240-12 (12-Bit), LTC2240-10 (10-Bit)
185Msps: LTC2220-1 (12-Bit)*
170Msps: LTC2220 (12-Bit), LTC2230 (10-Bit)*
135Msps: LTC2221 (12-Bit), LTC2231 (10-Bit)*
■ _{64-Pin 9mm × 9mm QFN Package}
U
APPLICATIO S
■ _{Wireless and Wired Broadband Communication}
■ _{Cable Head-End Systems}
■ _{Power Amplifier Linearization}
■ _{Communications Test Equipment}
DESCRIPTIO
The LTC^®2241-12 is a 210Msps, sampling 12-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2241-12 is perfect for
demanding communications applications with AC perfor-
mance that includes 65.5dB SNR and 78dB SFDR. Ultralow
jitter of 95fs_RMS allows IF undersampling with excellent
noise performance.
DC specs include ±0.7LSB INL (typ), ±0.4LSB DNL (typ)
and no missing codes over temperature.
The digital outputs can be either differential LVDS, or
single-ended CMOS. There are three format options for
the CMOS outputs: a single bus running at the full data rate
or two demultiplexed buses running at half data rate with
either interleaved or simultaneous update. A separate
output power supply allows the CMOS output swing to
range from 0.5V to 2.625V.
The ENC⁺ and ENC^– inputs may be driven differentially or
single ended with a sine wave, PECL, LVDS, TTL, or CMOS
inputs. An optional clock duty cycle stabilizer allows high
performance over 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.
*LTC2220-1, LTC2220, LTC2221, LTC2230, LTC2231 are 3.3V parts.
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
2.5V
V_DD
ANALOG
INPUT
+
INPUT
S/H
–
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
ENCODE
INPUT
OUTPUT
DRIVERS
0.5V
TO 2.625V
OV_DD
D11
• CMOS
• OR
• LVDS
D0
OGND
224112 TA01
SFDR vs Input Frequency
85
80
75
70
65
60
1V RANGE
55
50
2V RANGE
45
40
0 100 200 300 400 500 600 700 800 900 1000
INPUT FREQUENCY (MHz)
224112 G11
224112fa
1