LTC2222IUK-11#TRPBF Linear Technology, LTC2222IUK-11#TRPBF Datasheet

IC ADC 11BIT 105MSPS SAMPL 48QFN

LTC2222IUK-11#TRPBF

Manufacturer Part Number
LTC2222IUK-11#TRPBF
Description
IC ADC 11BIT 105MSPS SAMPL 48QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC2222IUK-11#TRPBF

Number Of Bits
11
Sampling Rate (per Second)
105M
Data Interface
Parallel
Number Of Converters
1
Power Dissipation (max)
535mW
Voltage Supply Source
Single Supply
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-WFQFN, Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
ANALOG
INPUT
REFH
REFL
Sample Rate: 105Msps
65.4dB SNR up to 140MHz Input
80dB SFDR up to 150MHz Input
775MHz Full Power Bandwidth S/H
Single 3.3V Supply
Low Power Dissipation: 475mW
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
48-Pin 7mm × 7mm QFN Package
Wireless and Wired Broadband Communication
Cable Head-End Systems
Power Amplifier Linearization
Communications Test Equipment
135Msps: LTC2224 (12-Bit), LTC2234 (10-Bit)
105Msps: LTC2222 (12-Bit), LTC2232 (10-Bit)
80Msps: LTC2223 (12-Bit), LTC2233 (10-Bit)
+
CLOCK/DUTY
REFERENCE
INPUT
CONTROL
FLEXIBLE
ENCODE
S/H
CYCLE
INPUT
U
PIPELINED
ADC CORE
11-BIT
U
3.3V
V
DD
CORRECTION
LOGIC
DRIVERS
OUTPUT
222211 TA01
DESCRIPTIO
The LTC
converter designed for digitizing high frequency, wide
dynamic range signals. The LTC2222-11 is perfect for
demanding communications applications with AC perfor-
mance that includes 65.4dB SNR and 80dB spurious free
dynamic range for signals up to 150MHz. Ultralow jitter of
0.15ps
excellent noise performance.
DC specs include ±0.15LSB INL (typ), ±0.1LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSB
A separate output power supply allows the CMOS output
swing to range from 0.5V to 3.3V.
The ENC
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.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
OGND
0.5V TO 3.3V
OV
DD
D10
D0
RMS
+
®
2222-11 is a 105Msps, sampling 11-bit A/D
and ENC
allows undersampling of IF frequencies with
11-Bit, 105Msps ADC
95
90
85
80
75
70
65
60
55
50
U
0
inputs may be driven differentially or
RMS
SFDR vs Input Frequency
100
INPUT FREQUENCY (MHz)
.
200
2nd OR 3rd
LTC2222-11
300
4th OR HIGHER
400
500
222211 TA01b
600
222211f
1

Related parts for LTC2222IUK-11#TRPBF

LTC2222IUK-11#TRPBF Summary of contents

Page 1

... 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. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3. ...

Page 2

... PLASTIC QFN EXPOSED PAD IS GND (PIN 49), ORDER PART NUMBER LTC2222CUK-11 LTC2222IUK-11 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature ranges. ...

Page 3

ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are 25°C. (Note 4) A SYMBOL PARAMETER V Analog Input Range ( Analog ...

Page 4

LTC2222- TER AL REFERE CE CHARACTERISTICS PARAMETER V Output Voltage CM V Output Tempco CM V Line Regulation CM V Output Resistance DIGITAL I PUTS A D DIGITAL OUTPUTS full operating temperature range, ...

Page 5

W U POWER REQUIRE E TS range, otherwise specifications are at T SYMBOL PARAMETER V Analog Supply Voltage DD OV Output Supply Voltage DD I Analog Supply Current VDD P Power Dissipation DISS P Shutdown Power SHDN P Nap Mode ...

Page 6

LTC2222- TYPICAL PERFOR A CE CHARACTERISTICS INL, 2V Range 1.0 0.8 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 – 1.0 1024 1536 0 512 2048 OUTPUT CODE 222211 G01 SNR vs Input Frequency, ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS SFDR and SNR vs Sample Rate, 2V Range 30MHz, –1dB IN 90 SFDR SNR 100 120 SAMPLE RATE (Msps) 222211 ...

Page 8

LTC2222- TYPICAL PERFOR A CE CHARACTERISTICS 8192 Point FFT 5MHz, –1dB, 2V Range IN 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 FREQUENCY (MHz) 8192 ...

Page 9

CTIO (Pin 1): Positive Differential Analog Input – (Pin 2): Negative Differential Analog Input. IN REFHA (Pins 3, 4): ADC High Reference. Bypass to Pins 5, 6 with 0.1µF ceramic ...

Page 10

LTC2222- FUNCTIONAL BLOCK DIAGRA + A IN INPUT FIRST PIPELINED S/H ADC STAGE – 1.6V CM REFERENCE 2.2µF RANGE SELECT REF SENSE BUF 10 W SECOND PIPELINED THIRD PIPELINED ADC STAGE ADC STAGE REFH REFL ...

Page 11

DIAGRA S ANALOG N INPUT – ENC + ENC D0-D10, OF CLOCKOUT OE DATA Timing Diagram – ...

Page 12

LTC2222- APPLICATIO S I FOR ATIO DYNAMIC PERFORMANCE Signal-to-Noise Plus Distortion Ratio The signal-to-noise plus distortion ratio [S/(N + D)] is the ratio between the RMS amplitude of the fundamental input frequency and the RMS amplitude of all ...

Page 13

U U APPLICATIO S I FOR ATIO CONVERTER OPERATION As shown in Figure 1, the LTC2222- CMOS pipelined multistep converter. The converter has five pipelined ADC stages; a sampled analog input will result in a digitized value five ...

Page 14

LTC2222- APPLICATIO S I FOR ATIO During the sample phase when ENC is low, the transistors connect the analog inputs to the sampling capacitors and they charge to, and track the differential input voltage. When ENC transitions from ...

Page 15

U U APPLICATIO S I FOR ATIO signal at its optimum DC level. Figure 3 shows a 1:1 turns ratio transformer. Other turns ratios can be used if the source impedance seen by the ADC does not exceed 100Ω for ...

Page 16

LTC2222- APPLICATIO S I FOR ATIO 0.1µF 12Ω ANALOG INPUT 0.1µF 25Ω T1 0.1µF 25Ω 12Ω MA/COM ETC1-1-13 RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE Figure 6. Recommended Front End Circuit for Input Frequencies Between 100MHz and ...

Page 17

U U APPLICATIO S I FOR ATIO Input Range The input range can be set based on the application. The 2V input range will provide the best signal-to-noise perfor- mance while maintaining excellent SFDR. The 1V input range will have ...

Page 18

LTC2222- APPLICATIO S I FOR ATIO DIGITAL OUTPUTS Digital Output Buffers Figure 13 shows an equivalent circuit for a single output buffer. Each buffer is powered by OV are isolated from the ADC power and ground. The addi- ...

Page 19

U U APPLICATIO S I FOR ATIO to the same power supply as for the logic being driven. For example if the converter is driving a DSP powered by a 1.8V supply then OV should be tied to that same ...

Page 20

LTC2222- APPLICATIO S I FOR ATIO R19 R1* C1 OPT 0.1µF T1* R2 ANALOG 24.9k INPUT J1 C2* R4 24.9k C3 0.1µF R6 50Ω 0.1µ 1µF ...

Page 21

U U APPLICATIO S I FOR ATIO Layer 1 Component Side W U Silkscreen Top LTC2222-11 Layer 2 GND Plane 222211f 21 ...

Page 22

LTC2222- APPLICATIO S I FOR ATIO Layer 3 Power Plane Layer 4 Bottom Side 222211f ...

Page 23

... PIN 1 TOP MARK (SEE NOTE 6) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 48-Lead Plastic QFN (7mm × ...

Page 24

... DC to 3GHz, 21dBm IIP3, Integrated LO Buffer 450MHz 1dB BW, 47dB OIP3, Digital Gain Control 10.5dB to 33dB in 1.5dB/Step 4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz 12.5dB, 50Ω Single-Ended RF and LO Ports www.linear.com ● 222211f LT/TP 0805 500 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 ...

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