lt5514 Linear Technology Corporation, lt5514 Datasheet
lt5514
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lt5514 Summary of contents
Page 1
... When both amplifiers are enabled (Standard mode), the LT5514 offers an OIP3 of +47dBm (at 100MHz). Power dissipation can be reduced when a single amplifier is enabled (Low Power mode). Four parallel digital inputs control the gain over a 22 ...
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... CC CC1 GND GND IN IN GND GND PGA0 PGA1 Consult LTC Marketing for parts specified with wider operating temperature ranges. U ENB AMP A AMP B LT5514 STATE High On On Enable Amp A and Amp B Low On Off Enable Amp A High Off On Enable Amp B Low Off Off ...
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... Max Gain (Note 6) 1.34 All Gain Settings (DC) Max Gain All Gain Settings OUT + – All Gain Settings Open Max Gain (Note 4) Min Gain (Note • I (Max Gain) CC OUT LT5514 = 25 C, unless otherwise A TYP MAX UNITS 5 5. 1.3 1.5 V ...
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... LT5514 AC ELECTRICAL CHARACTERISTICS 5V, ENA = ENB = 3V CCO and differential outputs, unless otherwise noted. (Note 7) (Test circuits shown in Figures 9 and 10) SYMBOL PARAMETER Dynamic Performance BW Large-Signal –3dB Bandwidth P Clipping Limited Maximum Sinusoidal OUT(MAX) Output Power g Amplifier Transconductance m S12 Reverse Isolation Step Response Rise and Fall Time ...
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... P IN OUT , as seen by the LT5514 differential outputs. All OUT LT5514 UNITS MHz dBm S dB dBm dBm dBc dBc dBm/Hz dBm/ 1. the power 5514f ...
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... LT5514 W U TYPICAL PERFOR A CE CHARACTERISTICS ENA = ENB = 3V, control input levels V IL Frequency Response for All Gain Steps 100 OUT 100 1000 FREQUENCY (MHz) 5514 G01 Frequency Response at 3dB Attenuation Step with C as OUT Parameter, R ...
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... FIGURE 10 TEST CIRCUIT ATTENUATION STEP (dB) LT5514 (Standard Mode 5V Harmonic Distortion vs Attenuation Step at P OUT Freq = 50MHz 200 OUT –72 FIGURE 10 TEST CIRCUIT PGA0 = LOW –75 HD3 –78 PGA0 = HIGH – ...
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... LT5514 W U TYPICAL PERFOR A CE CHARACTERISTICS ENA = ENB = 5V 5V CCO in Figure 10) OIP3 vs Frequency –23dBm IN Max Gain 200 OUT – 100 150 200 FREQUENCY (MHz) 5514 G19 OIP3 vs Attenuation Step at Freq = 100MHz – ...
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... W U TYPICAL PERFOR A CE CHARACTERISTICS ENA = ENB = 3V, control input levels V IL noted. Note 1: Subtract 0.75ns calibration delay from output plots to estimate the LT5514 group delay. Note 2: When specified connected differentially across the LT5514 OUT Pulse Response Max OUT Gain. Output Level is 2V ...
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... LT5514 W U TYPICAL PERFOR A CE CHARACTERISTICS ENA = 3V, ENB = 0.6V or ENA = 0.6V, ENB = 3V, control input levels V Figure 10) OIP3 vs Frequency at Pin = –23dBm, Max Gain and 1.5dB Attenuation Step 200 OUT MAX GAIN 42 39 1.5dB ATTENUATION 36 STEP 100 150 200 FREQUENCY (MHz) ...
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... AMPLIFIER B VOLTAGE REGULATOR GAIN CONTROL AND BIAS LOGIC V V PGA3 PGA2 PGA1 PGA0 CC1 CC2 Figure 1. Functional Block Diagram LT5514 or a choke inductor is recom choke inductor is recom- CC (Pin 2). CC1 – OUT 16 + OUT 15 ENABLE CONTROL ENB ENA ...
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... OUT seen by the LT5514’s differential outputs distinguished from the actual load impedance, R which will typically be coupled to the LT5514 output by an impedance transformation network. The power gain as a function of R The ideal curves are straight lines. The curved lines indicate the roll-off due to the finite (noninfinite) output resistance of the LT5514 ...
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... R and the LT5514 output loading, R OUT power or linearity minimize output noise, or for some other criteria as explained in the following sections. Two examples of output matching networks are shown in Figures 5 and 6 (as implemented in the LT5514 demo boards – ...
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... LT5514’s outputs are left unloaded, with instability as the undesirable consequence. In such cases, placing a resistive differential load (e.g., 2k small capacitor at the LT5514 outputs can be used to limit the maximum gain. > IN The LT5514 has about 30GHz gain-bandwidth product ...
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... PGA0 is low. Therefore, to achieve the LT5514’s highest linearity performance, the PGA0 pin should be set high. The LT5514 noise figure is 7.3dB in the maximum gain state. For the –3dB attenuation setting, the NF is 7.6dB. The noise figure increases in direct proportion to the amount of pro- grammed gain reduction for the 1 ...
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... As shown in the Typical Performance Characteristics, this gives a 2.8dB reduction in the output noise floor with no loss of linearity. In general, the output noise floor can be reduced by decreasing R reduced OIP3. In some situations, it may be feasible to use two LT5514 parts in parallel. In this case, the effective g ENA ENB L5 L6 ...
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... factor of two, the gain and output OUT noise floor decrease by 3dB, while yielding the same linearity as for one part added benefit, two LT5514 parts in parallel can drive an R OUT four, thus relaxing or eliminating the need in some cases for an output impedance transformation network ...
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... V . OSUP Application (Demo) Boards The LT5514 demo boards are provided in the versions shown in Figure 10 (with output transformer) and Fig- ure 11 (without output transformer). All I/O signal ports are matched Moreover, 1k resistors (not shown) connect all six control pins (ENA, ENB, PGA0, PGA1, ...
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... Higher V = 100 . The bottom compensate for the DC voltage drop on R1 and R2. Use TP2, TP3 to monitor the actual LT5514 output bias volt- age. By replacing R1 and R2 with inductors, this board can operate with a 5V supply. However, this may limit the minimum signal frequency ...
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... LT5514 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5511 High Linearity Upconverting Mixer LT5512 DC-3GHz High Signal Level Downconverting Mixer LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator LT5516 0.8GHz to 1.5GHz Direct Conversion Quadrature Demodulator LT5517 40MHz to 900MHz Quadrature Demodulator LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer LT5520 1 ...