LTC2242IUP-10 Datasheet, PDF (1/30 Pages) Linear Integrated Systems – 10-Bit, 250Msps ADC

LTC2242-10
10-Bit, 250Msps ADC
Features
n _{Sample Rate: 250Msps}
n _{60.5dB SNR}
n _{78dB SFDR}
n _{1.2GHz Full Power Bandwidth S/H}
n _{Single 2.5V Supply}
n _{Low Power Dissipation: 740mW}
n _{LVDS, CMOS, or Demultiplexed CMOS Outputs}
n _{Selectable Input Ranges: ±0.5V or ±1V}
n _{No Missing Codes}
n _{Optional Clock Duty Cycle Stabilizer}
n _{Shutdown and Nap Modes}
n _{Data Ready Output Clock}
n _{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)*
n _{64-Pin 9mm × 9mm QFN Package}
Applications
n _{Wireless and Wired Broadband Communication}
n _{Cable Head-End Systems}
n _{Power Amplifier Linearization}
n _{Communications Test Equipment}
Description
The LTC^®2242-10 is a 250Msps, sampling 10-bit A/D con-
verter designed for digitizing high frequency, wide dynamic
range signals. The LTC2240-10 is perfect for demanding
communications applications with AC performance that
includes 60.5dB SNR and 78dB SFDR. Ultralow jitter of
95fs_RMS allows IF undersampling with excellent noise
performance.
DC specs include ±0.4LSB INL (typ), ±0.2LSB 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.
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.
*LTC2220-1, LTC2220, LTC2221, LTC2230, LTC2231 are 3.3V parts.
Typical Application
REFH
REFL
ANALOG
INPUT
FLEXIBLE
REFERENCE
+
INPUT
S/H
–
CLOCK/DUTY
CYCLE
CONTROL
ENCODE
INPUT
2.5V
V_DD
10-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
OUTPUT
DRIVERS
0.5V
TO 2.625V
OV_DD
D9
• CMOS
• OR
• LVDS
D0
OGND
224210 TA01
SFDR vs Input Frequency
85
80
75
70
65
1V RANGE
60
2V RANGE
55
50
45
40
0 100 200 300 400 500 600 700 800 900 1000
INPUT FREQUENCY (MHz)
224210 G11
224210fd
1