LTC5583

FEATURES n n n n n n n n LTC5564 UltraFast™ 7ns Response Time 15GHz RF Power Detector with Comparator DESCRIPTION The LTC®5564 is a precision, RF power detector for applications in the 600MHz to 15GHz frequency range. The LTC5564 operates with input power levels from –24dBm to 16dBm. A temperature compensated Schottky diode peak detector, gain-selectable operational amplifier, and fast comparator are combined in a small 16-lead 3mm × 3mm QFN package. The RF input signal is peak detected and then sensed by both a comparator and amplifier. The comparator provides a 9ns response time to input levels exceeding VREF along with a latch enable/disable function. The gain selectable operational amplifier provides a 350V/µs slew rate and 75MHz of demodulation bandwidth to the analog output. VOUTADJ and VREF pins allow for the adjustment of VOUT offset and VCOMP switch point voltages, respectively. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and UltraFast is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. †Higher frequency operation is achievable with reduced performance. Consult the factory for more information. n Temperature Compensated Schottky RF Peak Detector Wide Input Frequency Range: 600MHz to 15GHz† Wide Input Power Range: –24dBm to 16dBm 7ns Typical Response Time 75MHz Demodulation Bandwidth Programmable Gain Settings for Improved Sensitivity Adjustable Amplifier Output Offset Voltage High Speed Comparator with Latch Enable: 9ns Typical Response Time 16-Lead 3mm × 3mm QFN Package RF Signal Presence Detectors for: 802.11a, 802.11b, 802.11g, 802.15, Optical Data Links, Wireless Data Modems, Wireless and Cable Infrastructure 5.8GHz ISM Band Radios MMDS Microwave Links PA Power Supply Envelope Tracking Control Fast Alarm RF Power Monitor Envelope Detector Ultra-Wideband Radio Radar Detector APPLICATIONS n n n n n n n n n TYPICAL APPLICATION Demo Board Schematic Optimized for 15GHz VCC 1000pF 17 2.2pF 0.5pF 1 2 3 4 10pF 16 15 14 100pF 13 VREF VCOMP VCC 12 11 10 68 10pF 1000pF VOUT VOUT OUTPUT VOLTAGE (mV) VOUT vs Input Power 2.7GHz 3400 3200 VCC = 5V 3000 TA = 25°C 2800 2600 GAIN8 2400 2200 GAIN4 2000 1800 1600 1400 GAIN1 1200 1000 800 600 GAIN2 400 200 0 –24 –20 –16 –12 –8 –4 0 4 8 12 16 RFIN POWER (dBm) 5564 TA01b 15GHz RFIN NC VCCRF VREF VCOMP RFIN NC GND GND LEN VOUTADJ G0 5 6 7 LTC5564 VCCA VCCP VOUT NC G1 8 9 100pF LEN VOUTADJ 10k G1 G0 10k 10k 5564 F05 5564fa 1 LTC5564 ABSOLUTE MAXIMUM RATINGS (Note 1) PIN CONFIGURATION TOP VIEW VCOMP 12 VCCA 17 GND 11 VCCP 10 VOUT 9 NC 5 LEN 6 VOUTADJ 7 G0 8 G1 VCCRF VREF NC RFIN 1 NC 2 GND 3 GND 4 Supply Voltages VCCRF = VCCA = VCCP ............................................ 5.8V RFIN Voltage for VCCRF ≤ 5.5V ....................(VCCRF ± 2V) RFIN Power ......................................................... 16dBm ICOMP, IVOUT ......................................................... ±10mA VOUTADJ, VREF, VCOMP, VOUT, G0, G1, LEN ... –0.3V to VCC Operating Temperature Range (Note 2)....–40°C to 85°C Max Junction Temperature .................................. 125°C Storage Temperature Range .................. –65°C to 150°C 16 15 14 13 UD PACKAGE 16-LEAD (3mm × 3mm) PLASTIC QFN TJMAX = 125°C, θJA = 68°C/W, θJC = 7.5°C/W EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH LTC5564IUD#PBF TAPE AND REEL LTC5564IUD#TRPBF PART MARKING LFRF PACKAGE DESCRIPTION 16-Lead (3mm × 3mm) Plastic QFN TEMPERATURE RANGE –40°C to 85°C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Supply Current Amplifier Characteristics VOUT Output Offset CONDITIONS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Supply voltage = VCCRF = VCCA = VCCP = 5V, GAIN1, CLOAD = 10pF , no RF input signal, unless otherwise noted. MIN l TYP 44 MAX 5.5 UNITS V mA 3.0 Supply Voltage = 5V, No RFIN GAIN1 GAIN2 GAIN4 GAIN8 Supply Voltage = 3.3V, No RFIN GAIN1 GAIN2 GAIN4 GAIN8 l l 195 195 290 295 315 360 280 280 290 315 395 395 mV mV mV mV mV mV mV mV l l 185 185 385 385 5564fa 2 LTC5564 ELECTRICAL CHARACTERISTICS PARAMETER VOUT Slew Rate Rise/Fall CONDITIONS Supply Voltage = 5V, VOUT 10% to 90%, ∆VOUT = 1.1V (Note 3) GAIN1, Pin = 10dBm to 16dBm GAIN2, Pin = 4dBm GAIN4, Pin = –2dBm GAIN8, Pin = –8dBm Supply Voltage = 3.3V, VOUT 10% to 90%, ∆VOUT = 1.1V (Note 3) GAIN1, Pin = 10dBm to 16dBm GAIN2, Pin = 4dBm GAIN4, Pin = –2dBm GAIN8, Pin = –8dBm Demodulation Bandwidth (Notes 4, 5) GAIN1, VOUT = 500mV GAIN2, VOUT = 500mV GAIN4, VOUT = 500mV GAIN8, VOUT = 500mV GAIN1 ∆VOUT = ±100mV (Note 5) (Note 5) Sourcing, RL = 2k Supply Voltage = 5V, RFIN Step to 50% VOUT (Note 3) GAIN1, Pin = 10dBm to 16dBm GAIN2, Pin = 4dBm GAIN4, Pin = –2dBm GAIN8, Pin = –8dBm Supply Voltage = 3.3V, RFIN Step to 50% VOUT (Note 3) GAIN1, Pin = 10dBm to 16dBm GAIN2, Pin = 4dBm GAIN4, Pin = –2dBm GAIN8, Pin = –8dBm VOUT Output Voltage Swing Comparator Characteristics Comparator Response Time Comparator Hysteresis IVREF Input Current RF Characteristics RFIN Frequency Range RFIN AC Input Resistance RFIN Input Shunt Capacitance RFIN Input Power Range Digital I/O LEN VIL/VIH G0 VIL/VIH G1 VIL/VIH Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC5564 is guaranteed functional within the operating temperature range from –40°C to 85°C. 0.8 0.8 0.8 VCCA – 0.8 VCCA – 0.8 VCCA – 0.8 V V V (Note 6) Frequency = 1000MHz, Power Level = 0dBm Frequency = 1000MHz, Power Level = 0dBm (Note 6) 0.6 to 15 135 0.77 –24 to 16 GHz Ω pF dBm 10dBm to 16dBm RFIN Step to VCOMP 50% (Note 3) 9 10 –2.3 ns mV µA Supply Voltage = 3V 1.4 1.7 7.0 9.0 11.0 14.0 7.1 9.0 11.0 14.0 The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. Supply voltage = VCCRF = VCCA = VCCP = 5V, GAIN1, CLOAD = 10pF , no RF input signal, unless otherwise noted. MIN TYP 350/70 185/70 120/70 50/50 325/70 185/70 120/70 50/50 75 52 35 15 0/225 10 MAX UNITS V/µs V/µs V/µs V/µs V/µs V/µs V/µs V/µs MHz MHz MHz MHz mV pF mA ns ns ns ns ns ns ns ns V VOUTADJ Input Range VOUT Load Capacitance VOUT Output Current VOUT Response Time Note 3: RFIN step from no power to stated level. Note 4: See typical curve for bandwidth vs output voltage. Note 5: See Applications Information section. Note 6: Specification is guaranteed by design and not 100% tested in production. 5564fa 3 LTC5564 TYPICAL PERFORMANCE CHARACTERISTICS Demodulation Bandwidth 30 VOUT = 500mV VOUT –3dB CROSSOVER (MHz) 20 10 GAIN (dB) 0 –10 –20 –30 –40 –50 0.01 GAIN8 GAIN4 GAIN2 GAIN1 0.1 1 10 FREQUENCY (MHz) 100 1000 5564 G01 Demodulation Bandwidth vs VOUT 80 70 60 50 40 30 20 10 0 200 85°C 250 300 350 VOUT (mV) 5564 G02 VOUT Pulse Response, PIN = 8dBm GAIN1 GAIN2 GAIN4 VOUT 500mV/DIV ASK MODULATED RF INPUT SIGNAL START GAIN8 VCC = 5V ASK MODULATION FREQUENCY 2.7GHz GAIN1 10ns/DIV 5564 G03 25°C 400 –40°C 450 500 VOUT Pulse Response = –10dBm 400 VOUT Offset vs Supply Voltage GAIN8 GAIN4 GAIN2 GAIN1 VOUT (mV) VOUT Offset vs Temperature GAIN1 350 330 310 AVERAGE 290 270 250 –3 STDEV VCC = 5V 3 STDEV 350 VOUT 50mV/DIV ASK MODULATED RF INPUT SIGNAL START VCC = 5V ASK MODULATION FREQUENCY 2.7GHz GAIN1 10ns/DIV 5564 G04 VOUT (mV) 300 250 3 3.5 4 4.5 VCC (V) 5 5.5 5564 G05 230 –40 –20 20 40 0 TEMPERATURE (°C) 60 80 5565 G06 VOUT Offset vs Temperature GAIN2 350 VCC = 5V 3 STDEV 330 410 390 370 350 VOUT (mV) VOUT (mV) AVERAGE 290 330 310 290 270 –3 STDEV 250 60 80 5565 G07 VOUT Offset vs Temperature GAIN4 VCC = 5V 590 3 STDEV 540 490 440 VOUT (mV) AVERAGE 390 340 290 –3 STDEV 240 190 –20 20 40 0 TEMPERATURE (°C) 60 80 5565 G08 VOUT Offset vs Temperature GAIN8 VCC = 5V 3 STDEV 310 AVERAGE 270 –3 STDEV 250 –40 –20 20 40 0 TEMPERATURE (°C) 230 –40 140 –40 –20 20 40 0 TEMPERATURE (°C) 60 80 5565 G09 5564fa 4 LTC5564 TYPICAL PERFORMANCE CHARACTERISTICS Supply Current vs Supply Voltage 48 46 44 ICC (mA) 42 40 38 36 34 GAIN1, GAIN2 GAIN4, GAIN8 4000 3600 VOUT OUTPUT VOLTAGE (mV) 3200 VOUT vs Input Power 700MHz VCC = 5V GAIN1 VOUT OUTPUT VOLTAGE (mV) 4800 4400 4000 3600 3200 2800 2400 2000 1600 1200 800 400 VOUT vs Input Power 1.9GHz VCC = 5V GAIN1 TA = 25°C 2800 2400 2000 1600 1200 800 400 –40°C 25°C 85°C 3 3.5 4 4.5 VCC (V) 5 5.5 5564 G10 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN INPUT POWER (dBm) 5564 G24 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN POWER (dBm) 5564 G25 3400 3200 VCC = 5V 3000 TA = 25°C 2800 2600 GAIN8 2400 2200 GAIN4 2000 1800 1600 1400 GAIN1 1200 1000 800 600 GAIN2 400 200 0 –24 –20 –16 –12 –8 –4 0 4 8 12 16 RFIN POWER (dBm) 5564 G11 VOUT vs Input Power 2.7GHz VOUT vs Input Power 2.7GHz 3600 VCC = 5V 3200 GAIN1 2800 2400 2000 1600 1200 800 400 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN POWER (dBm) 5564 G12 3200 2800 VOUT OUTPUT VOLTAGE (mV) VOUT vs Input Power 5.8GHz VCC = 5V GAIN1 VOUT OUTPUT VOLTAGE (mV) VOUT OUTPUT VOLTAGE (mV) –40°C 25°C 2400 2000 1600 1200 800 400 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN POWER (dBm) 5564 G13 –40°C 25°C 85°C 85°C VOUT vs Input Power 8GHz 2400 VOUT OUTPUT VOLTAGE (mV) 2000 1600 1200 800 400 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN INPUT POWER (dBm) 5564 G26 VOUT vs Input Power 10GHz 1600 1400 VOUT OUTPUT VOLTAGE (mV) 1200 1000 800 600 400 200 0 –24 –20 –16 –12 –8 –4 0 4 RFIN POWER (dBm) 8 12 16 5564 G27 VCC = 5V GAIN1 TA = 25°C VCC = 5V GAIN1 TA = 25°C 5564fa 5 LTC5564 TYPICAL PERFORMANCE CHARACTERISTICS VOUT vs Input Power 10GHz 4800 VCC = 5V 4400 T = 25°C A 4000 3600 3200 2800 2400 2000 1600 1200 800 400 0 –24 –20 –16 –12 –8 –4 0 4 RFIN POWER (dBm) 8 12 16 5564 G28 VOUT vs Input Power 12GHz 1800 1600 VOUT OUTPUT VOLTAGE (mV) VCC = 5V GAIN1 VOUT OUTPUT VOLTAGE (mV) –40°C 1000 VOUT vs Input Power 15GHz VCC = 5V GAIN1 TA = 25°C VOUT OUTPUT VOLTAGE (mV) GAIN8 GAIN4 GAIN2 GAIN1 1400 1200 1000 800 600 400 200 25°C 800 600 85°C 400 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN POWER (dBm) 5564 G14 0 –10 –8 –6 –4 –2 0 2 4 6 8 10 12 14 16 RFIN INPUT POWER (dBm) 5564 G29 Comparator Threshold Voltage vs RF Input Power 3600 RISING THRESHOLD VOLTAGE (mV) 3200 2800 2400 2000 1600 1200 800 400 0 –10 –6 –2 2 6 10 RFIN POWER (dBm) 14 18 5564 G15 Comparator Rising Edge Threshold vs Frequency 2000 1800 RISING EDGE VREF (mV) 1600 1400 VCC = 5V TA = 25°C RFIN = 10dBm VCC = 5V TA = 25°C FREQUENCY = 2.7GHz 1200 1000 800 600 400 0 8000 12000 4000 FREQUENCY (MHz) 16000 5564 G16 VREF RISING 35 30 PERCENT OF UNITS (%) 25 20 15 10 5 0 GAIN1 VOUT/RFIN Histogram 25 GAIN2 VOUT/RFIN Histogram 20 PERCENT OF UNITS (%) 15 10 5 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41 GAIN (V/V) 5564 G17 0 2.710 2.750 2.790 2.830 GAIN (V/V) 2.870 2.910 5564 G18 5564fa 6 LTC5564 TYPICAL PERFORMANCE CHARACTERISTICS GAIN4 VOUT/RFIN Histogram 20 12 10 GAIN8 VOUT/RFIN Histogram 45 40 PERCENT OF UNITS (%) 35 30 25 20 15 10 5 GAIN2/GAIN1 Histogram PERCENT OF UNITS (%) PERCENT OF UNITS (%) 15 8 6 4 2 10 5 0 5.52 5.6 5.68 5.76 GAIN (V/V) 5.84 5.92 5564 G19 0 11.425 11.625 11.825 12.025 12.225 12.425 GAIN (V/V) 5564 G20 0 1.925 1.945 1.965 1.985 GAIN2/GAIN1 2.005 2.025 5564 G21 GAIN4/GAIN2 Histogram 40 35 PERCENT OF UNITS (%) PERCENT OF UNITS (%) 2.005 2.030 2.055 GAIN4/GAIN2 2.080 2.105 5564 G22 GAIN8/GAIN4 Histogram 15 30 25 20 15 10 5 0 1.980 10 5 0 2.045 2.065 2.085 2.105 GAIN8/GAIN4 2.125 2.145 5564 G23 5564fa 7 LTC5564 PIN FUNCTIONS RFIN (Pin 1): RF Input Voltage. A coupling capacitor must be used to connect to the RF signal source. This pin has an internal 250Ω termination, an internal Schottky diode detector and an internal 8pF reservoir capacitor. NC (Pins 2, 9, 16): No Connect. These pins should be left unconnected by the user for best RF performance. GND (Pins 3, 4, Exposed Pad Pin 17): These pins should be tied to system ground. See Applications Information for best practices. LEN (Pin 5): Comparator Latch Enable Input. VCOMP will be latched when LEN is high and transparent when LEN is low. VOUTADJ (Pin 6): Amplifier Output Offset Adjust. When left floating, the VOUT pin of the amplifier will be at its nominal quiescent output offset value. See the Applications Information section for adjustment range. G0, G1 (Pins 7, 8): Amplifier Gain Selection. Logic low or high levels on the G0 and G1 pins will change the internal amplifier gain, bandwidth and slew rate characteristics. See the Applications Information section for gain setting codes. VOUT (Pin 10): Detector Amplifier Output. VCCP (Pin 11): High Current Power Supply Pin. VCCA (Pin 12): Analog Power Supply Pin. VCOMP (Pin 13): Comparator Output. VREF (Pin 14): Comparator Negative Input. Apply an external reference voltage to this pin. VCCRF (Pin 15): RF Power Supply Pin. SIMPLIFIED BLOCK DIAGRAM VCCRF VCCA VCCP RFIN 250 8pF 80µA 1.2k VP VBIAS LEN + – + – VOUTADJ 1.7k 1.6k 200 200 Figure 1. Simplified Block Diagram 8 + – VCOMP VREF VOUT PROGRAMMABLE FEEDBACK ARRAY 5564 F01 PINS 3, 4, EXPOSED PAD PIN 17 G1 G0 5564fa LTC5564 APPLICATIONS INFORMATION Operation The LTC5564 is a fast RF detector with a high speed amplifier and comparator. This product integrates these functions to provide RF detection over frequencies ranging from 600MHz to 15GHz. These functions include an RF Schottky peak detector, internally compensated operational amplifier, and a comparator as shown in Figure 1. The LTC5564 has selectable amplifier gains, amplifier output offset adjustment and comparator latch enable capabilities. Amplifier The high speed amplifier offers four gain settings and is capable of driving a 1.7mA load with an output swing range of approximately 295mV to VCC – 1.6V. See Table 1 for gain setting operation. The VOUTADJ pin provides output DC offset adjustment to satisfy various interface requirements. Setting VOUT to 500mV also provides the maximum demodulation bandwidth in each gain mode. See Electrical and Typical Performance Characteristics curve. See Table 1 for the Table 1. Gain Mode and Typical VOUTADJ Operation PIN G1 GND GND VCCA VCCA G0 GND VCCA GND VCCA GAIN MODE GAIN1 GAIN2 GAIN4 GAIN8 DESCRIPTION Minimum Gain Setting (VOUT/RFIN ≈ 1.5dB) VOUT/RFIN Increased 6dB VOUT/RFIN Increased 12dB VOUT/RFIN Increased 18dB REQUIRED VOUTADJ FOR A GIVEN DC OUTPUT OFFSET VOUTADJ = 0.95 • VOUT – 0.174 VOUTADJ = (VOUT – 0.07)/2.10 VOUTADJ = (VOUT + 0.05)/3.16 VOUTADJ = (VOUT + 0.25)/5.26 typical VOUTADJ voltage for the desired VOUT DC output offset in each gain setting. RF Detector The internal temperature compensated Schottky diode peak detector converts the RF input signal to a low frequency signal. The detector demonstrates excellent efficiency and linearity over a wide range of input power levels. The Schottky diode is nominally biased at 180µA and drives a parallel reservoir capacitor-resistor network of 8pF and 1.2k. Comparator The high speed comparator compares the external reference voltage on the VREF pin to the internal signal voltage VP from the peak detector and produces the output logic signal VCOMP . VP is the internal comparator positive input as shown in Figure 1. LEN provides latch enable/disable functionality as shown in Figure 2. Note: Valid range for VOUT ≈ 0.195V ≤ VOUT ≤ VCC – 1.6 LEN VREF VP VCOMP 5564 F02 VOUT TRANSPARENT VOUT LATCHED VOUT TRANSPARENT Figure 2. LTC5564 Comparator Latch Enable Function 5564fa 9 LTC5564 APPLICATIONS INFORMATION Propagation Delay, Slew Rate and Response Time The LTC5564 has been designed for high slew rate operation. For RF input power levels of 10dBm to 16dBm and a GAIN1 setting, the internal amplifier will slew at 350V/µs. In a given gain setting slew rate will be maximized for larger input power levels. Slew rate will degrade with smaller RFIN amplitude signals or when the amplifier gain is increased. See Electrical Characteristics. The LTC5564 has been designed to function as a positive peak detector. Consequently, the device responds to a rising signal at the RF detector input much more rapidly than a falling signal. Correspondingly, the rising edge of VOUT transitions much more rapidly than the falling edge transitions as shown in Figure 3. When operating in unity gain with a 10dBm to 16dBm RF input signal, the propagation delay to fifty percent ∆VOUT is approximately 7.0ns. The operational amplifier has been internally compensated to provide 75MHz bandwidth with VOUT = 500mV and a GAIN1 mode setting. With no RF input the output offset will be approximately 290mV. Lowering the output offset will degrade bandwidth performance. See the Typical Performance Characteristics. Loading, Bypass Capacitors and Board Layout The LTC5564 has been designed to directly drive a capacitive load of 10pF at VOUT. When driving a capacitive load greater than 10pF a series resistance should be added between VOUT and the load to maintain good stability. This resistance should be placed as close to VOUT as possible. See Table 2 for typical series resistor values for various capacitive loads. Table 2. Typical Series Resistor Values for VOUT Capacitive Loading CLOAD Up to 10pF 11pF to 20pF 21pF to 100pF Greater Than 100pF R SERIES 0Ω 40Ω 68Ω 100Ω Good layout practice and proper use of bypass capacitors will improve circuit performance and reduce the possibility of measurement error. Bypass capacitors should be used for pins VCCRF, VCCA, VCCP, VOUTADJ and VREF. Bypass capacitors should be connected as close to the LTC5564 as possible. All ground return path lengths and ohmic losses should be minimized. See Figure 5 in the Applications Information section for the demo board schematic showing these bypass capacitances. The LTC5564 return path for all supply currents is through the Pin 17 exposed pad. A high resistance path from the Pin 17 exposed pad to power supply ground will cause a VOUT output offset error. Board layout and connections that minimize ohmic losses from the Pin 17 exposed pad to power supply ground will reduce this error. Measurements being made relative to LTC5564 ground should be made as close to the Pin 17 exposed pad to reduce errors. VOUT 500mV/DIV ASK MODULATED RF INPUT SIGNAL START VCC = 5V ASK MODULATION FREQUENCY 2.7GHz GAIN1 10ns/DIV 5564 F03 Figure 3. VOUT Pulse Response, PIN = 8dBm 5564fa 10 LTC5564 APPLICATIONS INFORMATION Applications The LTC5564 can be used as a self-standing signal strength measurement receiver for a wide range of input signals from –24dBm to 16dBm and frequencies from 600MHz to 15GHz. In addition to power detection, the LTC5564 may be used as a demodulator for AM and ASK modulated signals. Depending on the application the RSSI may be split into two branches to provide AC-coupled data (e.g., audio) and a DC-coupled RSSI output for signal strength measurement and AGC. 47pF FROM RF MATCHING NETWORK/ANTENNA VCC 1000pF 10pF 1 11 15 12 3, 4, 17 RFIN VCCP VCCRF VCCA GND VCOMP LEN VREF 13 DETECT OVERVOLTAGE EVENT 5 LTC5564 G1 G0 7 µC 5564 F04 VOUT 10 DETECT VOLTAGE 8 + 14 Figure 4. 600MHz to 15GHz Power Detector VCC 1000pF 17 2.2pF 0.5pF 1 2 3 4 10pF 16 15 14 100pF 13 VREF VCOMP VCC 12 11 10 68 10pF 1000pF VOUT 15GHz RFIN NC VCCRF VREF VCOMP RFIN NC GND GND LEN VOUTADJ G0 5 6 7 LTC5564 VCCA VCCP VOUT NC G1 8 9 100pF LEN VOUTADJ 10k G1 G0 10k 10k 5564 F05 Figure 5. Demo Board Schematic Optimized for 15GHz 5564fa 11 LTC5564 PACKAGE DESCRIPTION UD Package 16-Lead Plastic QFN (3mm × 3mm) (Reference LTC DWG # 05-08-1691) 0.70 ±0.05 3.50 ± 0.05 1.45 ± 0.05 2.10 ± 0.05 (4 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 3.00 ± 0.10 (4 SIDES) PIN 1 TOP MARK (NOTE 6) 1.45 ± 0.10 (4-SIDES) 0.75 ± 0.05 BOTTOM VIEW—EXPOSED PAD R = 0.115 TYP 15 16 0.40 ± 0.10 1 2 PIN 1 NOTCH R = 0.20 TYP OR 0.25 × 45° CHAMFER (UD16) QFN 0904 0.200 REF 0.00 – 0.05 NOTE: 1. DRAWING CONFORMS TO JEDEC PACKAGE OUTLINE MO-220 VARIATION (WEED-2) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.25 ± 0.05 0.50 BSC 5564fa 12 LTC5564 REVISION HISTORY REV A DATE 02/11 DESCRIPTION Replaced and renamed Typical Application drawing Added new curves to Typical Performance Characteristics Revised Figure 5 PAGE NUMBER 1 5, 6 11 5564fa 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. 13 LTC5564 TYPICAL APPLICATION 600MHz to 15GHz RF Power Detector 33pF RF INPUT VCC 1000pF 10pF RFIN VCCA VCCRF VCCP GND VCOMP LEN VREF LTC5564 G1 G0 VOUTADJ VOUT + µC 5564 TA02 RELATED PARTS PART NUMBER DESCRIPTION Schottky Peak Detectors LTC5505 RF Power Detectors with >40dB Dynamic Range LTC5507 100kHz to 1000MHz RF Power Detector LTC5508 300MHz to 7GHz RF Power Detector LTC5509 300MHz to 3GHz RF Power Detector LTC5530 300MHz to 7GHz Precision RF Power Detector LTC5531 300MHz to 7GHz Precision RF Power Detector LTC5532 300MHz to 7GHz Precision RF Power Detector LTC5536 Precision 600MHz to 7GHz RF Power Detector with Fast Comparator Output RF Log Detectors LT5534 50MHz to 3GHz Log RF Power Detector with 60dB Dynamic Range ® LT 5537 Wide Dynamic Range Log RF/IF Detector LT5538 75dB Dynamic Range 3.8GHz Log RF Power Detector RMS Detectors LT5570 60dB Dynamic Range RMS Detector LTC5581 6GHz RMS Power Detector, 40dB Dynamic Range LTC5587 10MHz to 6GHz RMS Detector with Digitized Output LTC5582 LTC5583 10GHz, 57dB Dynamic Range RMS Detector 6GHz, Matched Dual RMS Detector Measures VSWR COMMENTS 300MHz to 3GHz, Temperature Compensated, 2.7V to 6V Supply 100kHz to 1GHz, Temperature Compensated, 2.7V to 6V Supply 44dB Dynamic Range, Temperature Compensated, SC70 Package 36dB Dynamic Range, Low Power Consumption, SC70 Package Precision VOUT Offset Control, Shutdown, Adjustable Gain Precision VOUT Offset Control, Shutdown, Adjustable Offset Precision VOUT Offset Control, Adjustable Gain and Offset 25ns Response Time, Comparator Reference Input, Latch Enable Input, –26dBm to +12dBm Input Range ±1dB Output Variation Over Temperature, 38ns Response Time, Log Linear Response Low Frequency to 1GHz, 83dB Log Linear Dynamic Range ±0.8dB Accuracy Over Temperature 40MHz to 2.7GHz, ±0.5dB Accuracy Over Temperature ±1dB Accuracy Over Temperature, Log Linear Response, 1.4mA at 3.3V 40dB Dynamic Detection Range, Integrated 12-Bit Serial Output ADC, ±1dB Accuracy Over Temperature 40MHz to 10GHz Operation, ±0.5dB Linearity Single-Ended RF Output— Requires No External Balun Transformer Up to 60dB Dynamic Range, ±0.5dB Accuracy Over Temperature, 40dB Channel-to-Channel Isolation with Single-Ended RF Inputs 5564fa 14 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● LT 0311 REV A • PRINTED IN USA www.linear.com  LINEAR TECHNOLOGY CORPORATION 2010