ltc2226iuh-trpbf Linear Technology Corporation, ltc2226iuh-trpbf Datasheet

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ltc2226iuh-trpbf

Manufacturer Part Number
ltc2226iuh-trpbf
Description
Ltc2227 - 12-bit, 40msps Low Power 3v Adcs
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
ANALOG
INPUT
REFH
REFL
Sample Rate: 65Msps/40Msps/25Msps
Single 3V Supply (2.7V to 3.4V)
Low Power: 205mW/120mW/75mW
71.3dB SNR
90dB SFDR
No Missing Codes
Flexible Input: 1V
575MHz Full Power Bandwidth S/H
Clock Duty Cycle Stabilizer
Shutdown and Nap Modes
Pin Compatible Family
125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit)
105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit)
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)
65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)
40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit)
32-Pin (5mm × 5mm) QFN Package
Wireless and Wired Broadband Communication
Imaging Systems
Ultrasound
Spectral Analysis
Portable Instrumentation
+
CLOCK/DUTY
REFERENCE
INPUT
CONTROL
FLEXIBLE
S/H
CYCLE
CLK
U
P-P
to 2V
PIPELINED
ADC CORE
12-BIT
P-P
Range
U
CORRECTION
LOGIC
DRIVERS
OUTPUT
222876 TA01
DESCRIPTIO
The LTC
40Msps/25Msps, low power 3V A/D converters designed
for digitizing high frequency, wide dynamic range signals.
The LTC2228/LTC2227/LTC2226 are perfect for demand-
ing imaging and communications applications with AC
performance that includes 71.3dB SNR and 90dB SFDR
for signals at the Nyquist frequency.
DC specs include ±0.3LSB INL (typ), ±0.15LSB DNL (typ)
and no missing codes over temperature. The transition
noise is a low 0.25LSB
A single 3V supply allows low power operation. A separate
output supply allows the outputs to drive 0.5V to 3.6V
logic.
A single-ended CLK input controls converter operation. An
optional clock duty cycle stabilizer allows high perfor-
mance at full speed for a wide range of clock duty cycles.
All other trademarks are the property of their respective owners.
LTC2228/LTC2227/LTC2226
, LTC and LT are registered trademarks of Linear Technology Corporation.
D11
OV
OGND
D0
DD
®
2228/LTC2227/LTC2226 are 12-bit 65Msps/
Low Power 3V ADCs
12-Bit, 65/40/25Msps
U
LTC2228: SNR vs Input Frequency,
RMS
72
71
70
69
68
0
–1dB, 2V Range, 65Msps
.
50
INPUT FREQUENCY (MHz)
100
150
2228 G09
222876fa
200
1

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ltc2226iuh-trpbf Summary of contents

Page 1

... A single-ended CLK input controls converter operation. An optional clock duty cycle stabilizer allows high perfor- mance 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 D11 • ...

Page 2

... LTC2228CUH LTC2228IUH LTC2227CUH LTC2227IUH LTC2226CUH LTC2226IUH 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. *The temperature grade is identified by a label on the shipping container. ...

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 ( ...

Page 4

LTC2228/LTC2227/LTC2226 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 CONDITIONS V Analog Supply (Note 9) DD Voltage OV Output Supply (Note 9) DD Voltage I Supply Current VDD P Power Dissipation DISS P Shutdown Power ...

Page 6

LTC2228/LTC2227/LTC2226 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2228: Typical INL, 2V Range, 65Msps 1.00 2227 G13 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 1024 2048 3072 4096 CODE 2226 G01 LTC2228: 8192 Point FFT 30MHz, ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2228: SFDR vs Input Frequency, –1dB, 2V Range, 65Msps 100 100 200 0 150 INPUT FREQUENCY (MHz) 2228 G10 LTC2228: SNR vs Input Level, f ...

Page 8

LTC2228/LTC2227/LTC2226 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2227: Typical INL, 2V Range, 40Msps 1.00 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 1024 2048 3072 CODE 2227 G01 LTC2227: 8192 Point FFT 30MHz, –1dB, 2V Range, ...

Page 9

W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2227: SFDR vs Input Frequency, –1dB, 2V Range, 40Msps 100 100 150 INPUT FREQUENCY (MHz) 2227 G10 LTC2227: SFDR vs Input Level ...

Page 10

LTC2228/LTC2227/LTC2226 W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2226: Typical INL, 2V Range, 25Msps 1.00 2227 G13 0.75 0.50 0.25 0 –0.25 –0.50 –0.75 –1.00 0 1024 2048 3072 4096 CODE 2226 G01 LTC2226: 8192 Point FFT 30MHz, ...

Page 11

W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2226: SFDR vs Input Frequency, –1dB, 2V Range, 25Msps 100 100 150 200 INPUT FREQUENCY (MHz) 2226 G10 LTC2226: SFDR vs Input Level, f ...

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LTC2228/LTC2227/LTC2226 CTIO (Pin 1): Positive Differential Analog Input (Pin 2): Negative Differential Analog Input. IN REFH (Pins 3, 4): ADC High Reference. Short together and bypass to pins 5, ...

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U U FUNCTIONAL BLOCK DIAGRA + A IN INPUT FIRST PIPELINED S/H ADC STAGE – 1.5V CM REFERENCE 2.2µF RANGE SELECT REF SENSE BUF LTC2228/LTC2227/LTC2226 W SECOND PIPELINED THIRD PIPELINED FOURTH PIPELINED ADC STAGE ADC STAGE ADC ...

Page 14

LTC2228/LTC2227/LTC2226 DIAGRA t AP ANALOG N INPUT t H CLK – 5 D0-D11 Timing Diagram – 4 ...

Page 15

U U 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 other ...

Page 16

LTC2228/LTC2227/LTC2226 U U APPLICATIO S I FOR ATIO CONVERTER OPERATION As shown in Figure 1, the LTC2228/LTC2227/LTC2226 is a CMOS pipelined multistep converter. The converter has six pipelined ADC stages; a sampled analog input will result in a digitized value ...

Page 17

U U APPLICATIO S I FOR ATIO Single-Ended Input For cost sensitive applications, the analog inputs can be driven single-ended. With a single-ended input the har- monic distortion and INL will degrade, but the SNR and DNL will remain unchanged. ...

Page 18

LTC2228/LTC2227/LTC2226 U U APPLICATIO S I FOR ATIO 2.2µF HIGH SPEED DIFFERENTIAL 25Ω AMPLIFIER ANALOG + + INPUT CM 12pF – – 25Ω Figure 4. Differential Drive with an Amplifier Figure 5 shows a single-ended input circuit. The imped- ance ...

Page 19

U U APPLICATIO S I FOR ATIO Reference Operation Figure 9 shows the LTC2228/LTC2227/LTC2226 refer- ence circuitry consisting of a 1.5V bandgap reference, a difference amplifier and switching and control circuit. The internal voltage reference can be configured for two ...

Page 20

LTC2228/LTC2227/LTC2226 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 ...

Page 21

U U APPLICATIO S I FOR ATIO Maximum and Minimum Conversion Rates The maximum conversion rate for the LTC2228/LTC2227/ LTC2226 is 65Msps (LTC2228), 40Msps (LTC2227), and 25Msps (LTC2226). For the ADC to operate properly, the CLK signal should have a ...

Page 22

LTC2228/LTC2227/LTC2226 U U APPLICATIO S I FOR ATIO Data Format Using the MODE pin, the LTC2228/LTC2227/LTC2226 parallel digital output can be selected for offset binary or 2’s complement format. Connecting MODE to GND or 1/3V selects offset binary output format. ...

Page 23

U U APPLICATIO S I FOR ATIO Clock Sources for Undersampling Undersampling raises the bar on the clock source and the higher the input frequency, the greater the sensitivity to clock jitter or phase noise. A clock source that degrades ...

Page 24

LTC2228/LTC2227/LTC2226 U U APPLICATIO S I FOR ATIO 222876fa ...

Page 25

U U APPLICATIO S I FOR ATIO Silkscreen Top LTC2228/LTC2227/LTC2226 W U Inner Layer 2 GND Topside 222876fa 25 ...

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LTC2228/LTC2227/LTC2226 U U APPLICATIO S I FOR ATIO Inner Layer 3 Power Silkscreen Bottom Bottomside 222876fa ...

Page 27

... ON THE TOP AND BOTTOM OF PACKAGE 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. LTC2228/LTC2227/LTC2226 ...

Page 28

... High IIP3: 21.5dBm at 900MHz, Quadrature Demodulator Integrated LO Quadrature Generator High IIP3: 21dBm at 800MHz, Quadrature Demodulator Integrated LO Quadrature Generator 4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz 12.5dB, 50Ω Single-Ended RF and LO Ports www.linear.com ● 222876fa LT 0106 REV A 1K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2004 ...

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