LTC2206IUK#PBF Linear Technology, LTC2206IUK#PBF Datasheet
LTC2206IUK#PBF
Specifications of LTC2206IUK#PBF
Available stocks
Related parts for LTC2206IUK#PBF
LTC2206IUK#PBF Summary of contents
Page 1
... CMOS inputs. An optional clock duty cycle stabilizer al- lows high performance at full speed with 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 ...
Page 2
... LTC2206CUK#PBF LTC2206CUK#TRPBF LTC2207IUK#PBF LTC2207IUK#TRPBF LTC2206IUK#PBF LTC2206IUK#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
Page 3
ANALOG INPUT The denotes the specifi cations which apply over the full operating temperature range, otherwise ● specifi cations are 25°C. (Note 4) A SYMBOL PARAMETER V Analog Input Range ( Analog ...
Page 4
LTC2207/LTC2206 DYNAMIC ACCURACY otherwise specifi cations are 25° SYMBOL PARAMETER CONDITIONS SFDR Spurious Free 5MHz Input (2.25V Range, PGA = 0) Dynamic Range 5MHz Input (1.5V Range, PGA = Harmonic 15MHz Input ...
Page 5
COMMON MODE BIAS CHARACTERISTICS the full operating temperature range, otherwise specifi cations are at T PARAMETER V Output Voltage CM V Output Tempco CM V Line Regulation CM V Output Resistance CM DIGITAL INPUTS AND DIGITAL OUTPUTS full operating temperature ...
Page 6
LTC2207/LTC2206 POWER REQUIREMENTS range, otherwise specifi cations are SYMBOL PARAMETER CONDITIONS V Analog Supply Voltage DD P Shutdown Power SHDN = V SHDN OV Output Supply Voltage DD I Analog Supply Current DC Input VDD P Power ...
Page 7
TIMING DIAGRAM ANALOG INPUT – ENC + ENC D0-D15 CLKOUT – CLKOUT TYPICAL PERFORMANCE CHARACTERISTICS LTC2207: INL, 105Msps 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0 8192 16384 24576 32768 40960 49152 57344 65536 OUTPUT CODE ...
Page 8
LTC2207/LTC2206 TYPICAL PERFORMANCE CHARACTERISTICS LTC2207: SFDR vs Input Level 15MHz, PGA = 0, IN Dither “Off”, 105Msps 140 120 100 -20 –10 –80 –70 –60 –50 –40 –30 INPUT LEVEL (dBFS) 22076 G07 ...
Page 9
TYPICAL PERFORMANCE CHARACTERISTICS LTC2207: SFDR vs Input Level 140MHz, PGA = 1, IN Dither “Off”, 105Msps 140 130 120 110 100 –70 –60 –50 –40 –30 –20 –10 ...
Page 10
LTC2207/LTC2206 TYPICAL PERFORMANCE CHARACTERISTICS LTC2207: SNR and SFDR vs Duty Cycle, 105Msps 110 100 DUTY CYCLE (%) LTC2206: INL, 80Msps 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2.0 0 8192 32768 40960 65536 ...
Page 11
TYPICAL PERFORMANCE CHARACTERISTICS LTC2206: 128K Point FFT 10.1MHz, –20dBFS, IN PGA = 0, Dither “On”, 80Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 ...
Page 12
LTC2207/LTC2206 TYPICAL PERFORMANCE CHARACTERISTICS LTC2206: 64K Point 2-Tone FFT 69.2MHz and 76.5MHz, IN –7dBFS, PGA = 0, 80Msps 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 ...
Page 13
TYPICAL PERFORMANCE CHARACTERISTICS LTC2206: 5MHz SFDR and SNR vs Sample Rate, 80Msps 105 SFDR 100 95 90 LIMIT 85 80 SNR 100 120 140 SAMPLE RATE (MHz) 22076 G50 Offset Voltage vs Temperature, ...
Page 14
LTC2207/LTC2206 PIN FUNCTIONS SENSE (Pin 1): Reference Mode Select and External Refer- ence Input. Tie SENSE select the internal 2.5V DD bandgap reference. An external reference of 2.5V or 1.25V may be used; both reference values will ...
Page 15
BLOCK DIAGRAM + A IN INPUT FIRST PIPELINED S/H ADC STAGE – DITHER SIGNAL GENERATOR RANGE SELECT SENSE PGA V CM BUFFER VOLTAGE REFERENCE SECOND PIPELINED THIRD PIPELINED FOURTH PIPELINED ADC STAGE ADC STAGE ADC CLOCKS DIFFERENTIAL ADC ...
Page 16
LTC2207/LTC2206 OPERATION 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 frequency components at the ADC output. The ...
Page 17
APPLICATIONS INFORMATION CONVERTER OPERATION The LTC2207/LTC2206 are CMOS pipelined multistep con- verters with a front-end PGA. As shown in Figure 1, the con- verter has fi ve pipelined ADC stages; a sampled analog input will result in a digitized value ...
Page 18
LTC2207/LTC2206 APPLICATIONS INFORMATION SAMPLE/HOLD OPERATION AND INPUT DRIVE Sample/Hold Operation Figure 2 shows an equivalent circuit for the LTC2207/ LTC2206 CMOS differential sample and hold. The differ- ential analog inputs are sampled directly onto sampling capacitors (C ) through NMOS ...
Page 19
APPLICATIONS INFORMATION INPUT DRIVE CIRCUITS Input Filtering A fi rst order RC lowpass fi lter at the input of the ADC can serve two functions: limit the noise from input cir- cuitry and provide isolation from ADC S/H switching. The ...
Page 20
LTC2207/LTC2206 APPLICATIONS INFORMATION Direct Coupled Circuits Figure 5 demonstrates the use of a differential amplifi convert a single ended input signal into a differential input signal. The advantage of this method is that it provides low frequency input ...
Page 21
APPLICATIONS INFORMATION 1.25V 2.2μF SENSE 2 6 3.3V LTC1461-2.5 1μF 2.2μF 4 Figure 7. A 2.25V Range ADC with an External 2.5V Reference 0.1μF T1 50Ω 8.2pF 50Ω 0.1μF 0.1μ MA/COM ETC1-1-13 RESISTORS AND CAPACITORS ARE 0402 PACKAGE ...
Page 22
LTC2207/LTC2206 APPLICATIONS INFORMATION Driving the Encode Inputs The noise performance of the LTC2207/LTC2206 can depend on the encode signal quality as much as for the analog input. The encode inputs are intended to be driven differentially, primarily for noise immunity ...
Page 23
APPLICATIONS INFORMATION DIGITAL OUTPUTS Digital Output Buffers Figure 11 shows an equivalent circuit for a single output buffer. Each buffer is powered by OV from the ADC power and ground. The additional N-channel transistor in the output driver allows operation ...
Page 24
LTC2207/LTC2206 APPLICATIONS INFORMATION Digital Output Randomizer Interference from the ADC digital outputs is sometimes unavoidable. Interference from the digital outputs may be from capacitive or inductive coupling or coupling through the ground plane. Even a tiny coupling factor can result ...
Page 25
APPLICATIONS INFORMATION PC BOARD FPGA CLKOUT OF D15/D0 LTC2207/ LTC2206 D14/D0 D2/D0 D1/D0 D0 Figure 14. Descrambling a Scrambled Digital Output LTC2207/LTC2206 D15 D14 • • • 22076 F14 22076fc 25 ...
Page 26
LTC2207/LTC2206 APPLICATIONS INFORMATION Grounding and Bypassing The LTC2207/LTC2206 require a printed circuit board with a clean unbroken ground plane; a multilayer board with an internal ground plane is recommended. The pinout of the LTC2207/LTC2206 has been optimized for a fl ...
Page 27
APPLICATIONS INFORMATION Silkscreen Top LTC2207/LTC2206 Top Side 22076fc 27 ...
Page 28
LTC2207/LTC2206 APPLICATIONS INFORMATION Inner Layer 2 Inner Layer 4 28 Inner Layer 3 Inner Layer 5 22076fc ...
Page 29
APPLICATIONS INFORMATION Bottom Side LTC2207/LTC2206 Silkscreen Bottom 22076fc 29 ...
Page 30
LTC2207/LTC2206 APPLICATIONS INFORMATION Ordering Guide: DEMO BOARD NUMBER PART NUMBER DC918C-A LTC2207CUK DC918C-B LTC2207CUK DC918C-C LTC2206CUK DC918C-D LTC2206CUK DC918C-E LTC2205CUK DC918C-F LTC2205CUK DC918C-G LTC2204CUK DC918C-H LTC2207CUK-14 DC918C-I LTC2207CUK-14 DC918C-J LTC2206CUK-14 DC918C-K LTC2206CUK-14 DC918C-L LTC2205CUK-14 See Web site for ordering details ...
Page 31
... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
Page 32
... High IIP3: 20dBm at 1.9GHz, Integrated LO Quadrature Generator High IIP3: 21.5dBm at 900MHz, Integrated LO Quadrature Generator High IIP3: 21dBm at 800MHz, 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 ● 22076fc LT 0809 REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 ...