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Linear Technology Electronic Components Datasheet

LTC2221UP Datasheet

12-Bit ADCs

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FEATURES
Sample Rate: 170Msps/135Msps
67.5dB SNR up to 140MHz Input
80dB SFDR up to 170MHz Input
775MHz Full Power Bandwidth S/H
Single 3.3V Supply
Low Power Dissipation: 890mW/660mW
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
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
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LTC2220/LTC2221
12-Bit,170Msps/
135Msps ADCs
DESCRIPTIO
The LTC®2220 and LTC2221 are 170Msps/135Msps, sam-
pling 12-bit A/D converters designed for digitizing high
frequency, wide dynamic range signals. The LTC2220/
LTC2221 are perfect for demanding communications
applications with AC performance that includes 67.5dB
SNR and 80dB spurious free dynamic range for signals
up to 170MHz. Ultralow jitter of 0.15psRMS allows
undersampling of IF frequencies with excellent noise
performance.
DC specs include ±0.4LSB INL (typ), ±0.3LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.5LSBRMS.
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 3.6V.
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 at full speed for a wide range of clock duty
cycles.
TYPICAL APPLICATIO
REFH
REFL
FLEXIBLE
REFERENCE
3.3V
VDD
ANALOG
INPUT
+
INPUT
S/H
12-BIT
PIPELINED
ADC CORE
CORRECTION
LOGIC
CLOCK/DUTY
CYCLE
CONTROL
ENCODE
INPUT
OUTPUT
DRIVERS
0.5V
TO 3.6V
OVDD
D11
• CMOS
• OR
• LVDS
D0
OGND
22201 TA01
SFDR vs Input Frequency
100
90
4th OR HIGHER
80
70
2nd OR 3rd
60
50
40
0 100 200 300 400 500 600
INPUT FREQUENCY (MHz)
22201 TA01b
22201fa
1


Linear Technology Electronic Components Datasheet

LTC2221UP Datasheet

12-Bit ADCs

No Preview Available !

LTC2220/LTC2221
ABSOLUTE AXI U RATI GS
OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) ................................................. 4V
Digital Output Ground Voltage (OGND) ....... –0.3V to 1V
Analog Input Voltage (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
LTC2220C, LTC2221C ............................. 0°C to 70°C
LTC2220I, LTC2221I ...........................–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
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
REFLB 7
42 OVDD
REFLB 8
65
41 OGND
REFHB 9
40 D6+/DA0
REFHB 10
39 D6/CLOCKOUTA
REFLA 11
38 D5+/CLOCKOUTB
REFLA 12
37 D5/OFB
VDD 13
VDD 14
36 CLOCKOUT +/DB11
35 CLOCKOUT /DB10
VDD 15
34 OVDD
GND 16
33 OGND
UP PACKAGE
64-LEAD (9mm × 9mm) PLASTIC QFN
TJMAX = 125°C, θJA = 20°C/W
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER UP PART MARKING*
LTC2220CUP
LTC2220IUP
LTC2221CUP
LTC2221IUP
LTC2220UP
LTC2220UP
LTC2221UP
LTC2221UP
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The temperature grade is identified by a label on the shipping container.
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
LTC2220
MIN TYP MAX
LTC2221
MIN TYP MAX
UNITS
Resolution (No Missing Codes)
12
12
Bits
Integral Linearity Error
Differential Analog Input (Note 5)
–1.5 ±0.4
1.5
–1
±0.4
1
LSB
Differential Linearity Error
Differential Analog Input
–1
±0.3
1
–1
±0.2
1
LSB
Integral Linearity Error
Single-Ended Analog Input (Note 5)
±1
±1
LSB
Differential Linearity Error
Single-Ended Analog Input
±0.3
±0.2
LSB
Offset Error
(Note 6)
–35
±3
35
–35
±3
35
mV
Gain Error
External Reference
–2.5 ±0.5
2.5
–2.5 ±0.5
2.5
%FS
Offset Drift
±10
±10
µV/C
Full-Scale Drift
Internal Reference
External Reference
±30
±30
ppm/C
±15
±15
ppm/C
Transition Noise
SENSE = 1V
0.5
0.5
LSBRMS
22201fa
2


Part Number LTC2221UP
Description 12-Bit ADCs
Maker Linear
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LTC2221UP Datasheet PDF






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