lt5524 Linear Technology Corporation, lt5524 Datasheet
lt5524
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lt5524 Summary of contents
Page 1
... AC response when driving capacitive loads, and excellent reverse isolation. The LT5524 may be operated broadband, where the out- put differential RC time constant sets the bandwidth may be used as a narrowband driver with the appropriate output filter ...
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... High High High Low Low High Low High Low Low Low Low Low U W INFORMATION ORDER PART TOP VIEW NUMBER CC2 LT5524EFE 3 18 GND 4 17 GND + – OUT 21 – OUT 7 14 GND 8 13 GND 9 12 PGA3 ...
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... IN 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 LT5524 TYP MAX UNITS 5 5. 5.5 V 1.3 1 µA 20 µA 20 µA 44 100 µ ...
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... P IN OUT , as seen by the LT5524 differential outputs. All OUT UNITS MHz 8 V dBm S dB dBm dBm dBc dBc dBm/Hz dBm/ 2 Ω ...
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... MAX GAIN –70 –75 –80 –85 –90 –95 –100 100 150 200 –6 5524 G07 LT5524 T = 25° 3V, control A CC CCO Gain Error vs Attenuation Step at 100MHz 200Ω OUT 0.8 25°C –40°C 0.6 85°C 0.4 ...
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... LT5524 W U TYPICAL PERFOR A CE CHARACTERISTICS 5V, control input levels V CC CCO Noise Figure vs Frequency 10.0 9.5 1.5dB ATTENUATION STEP (PGA0 = LOW) 9.0 8.5 MAX GAIN 8.0 3dB ATTENUATION STEP (PGA1 = LOW) 7.5 7 100 150 200 250 300 350 400 FREQUENCY (MHz) 5524 G09 Pulse Response vs Output Level at Max Gain. Indicated Voltage Levels are into 50Ω ...
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... ATTENUATOR R IN 100Ω GAIN CONTROL LOGIC V V PGA3 PGA2 PGA1 PGA0 CC1 CC2 Figure 1. Functional Block Diagram LT5524 or a choke inductor is recom choke inductor is recom- CC (Pin 2). CC1 – OUT 16 AMPLIFIER + OUT 15 ENABLE CONTROL 5524 F01 ...
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... OUT seen by the LT5524’s differential outputs distinguished from the actual load impedance, R which will typically be coupled to the LT5524 output by an impedance transformation network. The power gain as a function of R The ideal relationship is linear. The curved line indicates the roll-off due to the finite (noninfinite) output resistance of the LT5524 ...
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... R and the LT5524 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 LT5524 demo boards – ...
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... LT5524’s outputs are left unloaded, with instability as the undesirable consequence. In such cases, placing a resistive differential load (e.g., 4k small capacitor at the LT5524 outputs can be used to > IN limit the maximum gain. ...
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... PGA0 is low. Therefore, to achieve the LT5524’s highest linearity performance, the PGA0 pin should be set high. The LT5524 noise figure is 8.6dB at 100MHz in the maxi- mum gain state. For the –3dB attenuation setting, the NF is 9.2dB. The noise figure increases in direct proportion to the amount of programmed gain reduction for the 1 ...
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... The LT5524’s output reactance is capacitive. Therefore improved AC response is possible by using external series output inductors. When driving purely resistive loads, an inductor in series with the LT5524 output may help to achieve maximally flat AC response as exemplified in the characterization setup schematic (Figure 9). The series inductor can extend the application bandwidth, but it provides no improvement in linearity performance ...
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... U U APPLICATIO S I FOR ATIO In fixed gain applications, the LT5524 can be set to 3dB attenuation relative to maximum gain. As shown in the Typical Performance Characteristics, this gives a 2dB reduction in the output noise floor with no loss of linearity. In general, the output noise floor can be reduced by decreasing R ...
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... The Wideband Differential Output Application Board (Fig- ure 11 example of direct coupling (no transformer) to the load, and has wider output bandwidth. This board gives direct access to the LT5524’s output pins, and was used for stability tests. Higher V compensate for the DC voltage drop on R1 and R2. Use TP2, TP3 to monitor the actual LT5524 output bias volt- age ...
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... BSC 0.195 – 0.30 (.0077 – .0118) 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT MILLIMETERS (INCHES) *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE LT5524 6.40 – 6.60* (.252 – .260) 3.86 (.152 6.40 2.74 (.252) ( ...
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... LT5524 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5511 High Linearity Upconverting Mixer LT5512 DC-3GHz High Signal Level Downconverting Mixer LT5514 Ultralow Distortion IF Amplifier/ADC Driver with Digitally Controlled Gain LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator LT5516 0.8GHz to 1.5GHz Direct Conversion Quadrature Demodulator ...