LTC5505 LINER [Linear Technology], LTC5505 Datasheet
LTC5505
Available stocks
Related parts for LTC5505
LTC5505 Summary of contents
Page 1
FEATURES Input Frequency Range: 0.8GHz to 2.7GHz* ■ ■ 50Ω Single-Ended RF and LO Ports High IIP3: 28dBm at 900MHz, 22.6dBm at 1.9GHz ■ High IIP2: 54.1dBm at 900MHz, 60dBm at 1.9GHz ■ ■ Input P1dB: 13.2dBm at 900MHz I/Q ...
Page 2
LT5575 ABSOLUTE MAXIMUM RATINGS (Note 1) Power Supply Voltage ..............................................5.5V Enable Voltage ................................ –0. Input Power ....................................................10dBm RF Input Power ....................................................20dBm RF Input DC Voltage ...............................................±0.1V LO Input DC Voltage ..............................................±0.1V Operating Ambient Temperature ..............–40°C to 85°C ...
Page 3
AC ELECTRICAL CHARACTERISTICS PARAMETER RF Input Frequency Range LO Input Frequency Range Baseband Frequency Range Baseband I/Q Output Impedance RF Input Return Loss LO Input Return Loss LO Input Power AC ELECTRICAL CHARACTERISTICS 2-tone IIP2 and IIP3 tests), Baseband Frequency ...
Page 4
LT5575 AC ELECTRICAL CHARACTERISTICS 2-tone IIP2 and IIP3 tests), Baseband Frequency = 1MHz (0.9MHz and 1.1MHz for 2-tone tests), P (Notes PARAMETER Isolation Note 1: Stresses beyond those listed under Absolute Maximum Ratings may ...
Page 5
TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Note 6). Conversion Gain, NF and IIP3 vs Frequency 35 –40°C 25°C 30 85°C IIP3 25 LOW MID BAND BAND 20 HIGH ...
Page 6
LT5575 TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Note 6). Conversion Gain, IIP3 Input Power at 900MHz 901MHz LO IIP3 30 25 –40°C ...
Page 7
TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Notes 6, 7). I/Q Gain Mismatch vs LO Input Power 0 1MHz BB 0.2 0.1 2500MHz 1900MHz 0.0 900MHz –0.1 ...
Page 8
LT5575 TYPICAL AC PERFORMANCE CHARACTERISTICS (–10dBm/tone for 2-tone IIP2 and IIP3 tests), f Test Circuit Shown in Figure 1 (Note 6). Conversion Gain Distribution at 1900MHz 25° ...
Page 9
PIN FUNCTIONS GND (Pins 11): Ground pin. RF (Pin 2): RF Input Pin. This is a single-ended 50Ω ter- minated input. No external matching network is required for the high frequency band. An external series capacitor ...
Page 10
LT5575 TEST CIRCUIT J1 RF 0.018" = 4.4 r 0.062" 0.018" SIZE REF DES VALUE C5, C7 1000pF 0402 C8 0.1µF 0402 C9 2.2µF 3216 R1 100kΩ 0402 Figure 2. Top Side of Evaluation Board 10 J3 – I OUT ...
Page 11
APPLICATIONS INFORMATION The LT5575 is a direct I/Q demodulator targeting high linearity receiver applications, such as RFID readers and wireless infrastructure. It consists of RF transconductance amplifi ers, I/Q mixers, a quadrature LO phase shifter, and bias circuitry. The RF ...
Page 12
LT5575 APPLICATIONS INFORMATION The RF input impedance and S11 parameters (without external matching components) are listed in Table 1. Table 1. RF Input Impedance FREQUENCY INPUT Ω (GHz) IMPEDANCE ( ) 0.8 8.1 +j 21.3 0.9 10.5 +j 24.9 1.0 ...
Page 13
APPLICATIONS INFORMATION The LO input impedance and S11 parameters (without external matching components) are listed in Table 2. Table 2. LO Input Impedance FREQUENCY INPUT Ω (GHz) IMPEDANCE ( ) 0.8 9.6 +j 23.7 0 27.1 1.0 17.9 ...
Page 14
LT5575 APPLICATIONS INFORMATION Care should be taken when the demodulator’s outputs are DC-coupled to the external load to make sure that the I/Q mixers are biased properly. If the current drain from the outputs exceeds 6mA, there can be signifi ...
Page 15
PACKAGE DESCRIPTION 4.35 ± 0.05 2.15 ± 0.05 2.90 ± 0.05 (4 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 4.00 ± 0.10 (4 SIDES) PIN 1 TOP MARK (NOTE 6) NOTE: 1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION ...
Page 16
LT5575 RELATED PARTS PART NUMBER DESCRIPTION Infrastructure LT5514 Ultralow Distortion, IF Amplifi er/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 LT5517 40MHz to 900MHz Quadrature Demodulator ...