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Linear Technology Electronic Components Datasheet

LTC2242-12 Datasheet

250Msps ADC

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LTC2242-12 pdf
LTC2242-12
12-Bit, 250Msps ADC
FEATURES
www.datSaashmeept4leu.cRoamte: 250Msps
65.4dB SNR
78dB SFDR
1.2GHz Full Power Bandwidth S/H
Single 2.5V Supply
Low Power Dissipation: 740mW
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®2242-12 is a 250Msps, sampling 12-bit A/D
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2242-12 is perfect for
demanding communications applications with AC perfor-
mance that includes 65.4dB SNR and 78dB SFDR. Ultralow
jitter of 95fsRMS allows IF undersampling with excellent
noise performance.
DC specs include ±1.0LSB 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 ENCinputs 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
VDD
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
OVDD
D11
• CMOS
• OR
• LVDS
D0
OGND
224212 TA01
SFDR vs Input Frequency
85
80
75
70
1V RANGE
65
60
2V RANGE
55
50
45
40
0 100 200 300 400 500 600 700 800 900 1000
INPUT FREQUENCY (MHz)
224212 G11
224212f
1


Linear Technology Electronic Components Datasheet

LTC2242-12 Datasheet

250Msps ADC

No Preview Available !

LTC2242-12 pdf
LTC2242-12
ABSOLUTE AXI U RATI GS OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) .............................................. 2.8V
Digital Output Ground Voltage (OGND) ....... –0.3V to 1V
wwwA.dnataalsohgeeItn4up.ucotmVoltage (Note 3) ..... –0.3V to (VDD + 0.3V)
Digital Input Voltage .................... –0.3V to (VDD + 0.3V)
Digital Output Voltage ............... –0.3V to (OVDD + 0.3V)
Power Dissipation............................................ 1500mW
Operating Temperature Range
LTC2242C-12 .......................................... 0°C to 70°C
LTC2242I-12 .......................................–40°C to 85°C
Storage Temperature Range ..................–65°C to 150°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ORDER PART
NUMBER
UP PART
MARKING*
LTC2242CUP-12
LTC2242UP-12
AIN+ 1
AIN+ 2
AIN– 3
AIN– 4
REFHA 5
REFHA 6
48 D9+/DA6
47 D9/DA5
46 D8+/DA4
45 D8/DA3
44 D7 +/DA2
43 D7 /DA1
LTC2242IUP-12
LTC2242UP-12
REFLB 7
42 OVDD
REFLB 8 65 41 OGND
REFHB 9
40 D6+/DA0
REFHB 10
39 D6/CLKOUTA
REFLA 11
38 D5+/CLKOUTB
REFLA 12
37 D5/OFB
VDD 13
VDD 14
36 CLKOUT +/DB11
35 CLKOUT /DB10
VDD 15
34 OVDD
GND 16
33 OGND
UP PACKAGE
64-LEAD (9mm × 9mm) PLASTIC QFN
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
TJMAX = 150°C, θJA = 20°C/W
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
*The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
CO VERTER CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Resolution (No Missing Codes)
12
Bits
Integral Linearity Error
Differential Analog Input (Note 5)
–2.7 ±1 2.7
LSB
Differential Linearity Error
Differential Analog Input
–1 ±0.4 1
LSB
Offset Error
(Note 6)
–17 ±5 17
mV
Gain Error
External Reference
–3.2 ±0.7 3.2
%FS
Offset Drift
±10 µV/C
Full-Scale Drift
Internal Reference
External Reference
±60 ppm/C
±45 ppm/C
Transition Noise
SENSE = 1V
0.74 LSBRMS
224212f
2


Part Number LTC2242-12
Description 250Msps ADC
Manufacturer Linear Technology
Total Page 28 Pages
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LTC2242-12 pdf
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