LT5534 50MHz to 3GHz RF Power Detector with 60dB Dynamic Range FEATURES DESCRIPTION n RF Frequency Range: 50MHz to 3GHz The LT®5534 is a 50MHz to 3GHz monolithic RF power n Linear Dynamic Range: 60dB detector capable of measuring RF signals over a 60dB n Exceptional Accuracy over Temperature dynamic range. The RF signal in a decibel scale is pre- and Power Supply cisely converted into DC voltage on a linear scale. The n Fast Transient Response: 60dB input dynamic range is achieved using cascaded RF 38ns Full-Scale Settling Time detectors and RF limiters. Their outputs are summed to n Single 2.7V to 5.25V Supply generate an accurate log-linear DC voltage proportional n Low Supply Current: 7mA to the input RF signal in dB. The output is buffered with a n Shutdown Current: 0.1µA low output impedance driver. The LT5534 delivers superior n Tiny 6-Lead SC70 Package temperature stability (typical output variation within ±1dB over the full temperature range). The output responds in APPLICATIONS less than 40ns to a large RF input signal. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n RF RSSI and ACC Technology Corporation. All other trademarks are the property of their respective owners. n RF Power Control n CATV Power Detection n Optical Receiver Gain Control TYPICAL APPLICATION 50MHz to 3GHz RF Power Detector Output Voltage vs RF Input Power 3V 2.4 3 0.1µF 100pF VCC = 3V AT 900MHz 2.0 2 LT5534 VCC L IN INPURTF 1nF RFDET DET DET DET DET VOUT VOUT V (V)OUT11..26 01 EARITY ERRO 47Ω 0.8 –1 R (d ENABLE EN B ) GND 0.4 TA = 25°C –2 5534 TA01 TA = 85°C TA = –40°C 0 –3 –60 –50 –40 –30 –20 –10 0 RF INPUT POWER (dBm) 5534 TA01b 5534fc 1

LT5534 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Power Supply Voltage ..............................................5.5V TOP VIEW Enable Voltage .....................................................0V, VCC EN 1 6 RF RF Voltage (+10dBm Equivalent) ..............................±1V GND 2 5 GND Operating Ambient Temperature Range ...–40°C to 85°C VOUT 3 4 VCC Storage Temperature Range ...................–65°C to 125°C SC6 PACKAGE Lead Temperature (Soldering, 10 sec) ..................300°C 6-LEAD PLASTIC SC70 TJMAX = 125°C, θJA = 256°C/W ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT5534ESC6#PBF LT5534ESC6#TRPBF LBGD 6-Lead Plastic SC70 –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 V = 3V, EN = 3V, T = 25°C, source impedance = 50Ω, unless otherwise CC A noted. Test circuit shown in Figure 1. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS RF Input Frequency Range 50 to 3000 MHz Input Impedance 2 kΩ f = 50MHz RF RF Input Power Range –58 to +2 dBm Dynamic Range (Note 3) ±3dB Linearity Error, T = –40°C to 85°C 60 dB A Output Slope 44 mV/dB Output Variation vs Temperature P = –48dBm to –14dBm, T = –40°C to 85°C 0.007 dB/°C IN A f = 900MHz RF RF Input Power Range –60 to 0 dBm Dynamic Range (Note 3) ±3dB Linearity Error, T = –40°C to 85°C 60 dB A Output Slope 41 mV/dB Output Variation vs Temperature P = –48dBm to –14dBm, T = –40°C to 85°C 0.008 dB/°C IN A f = 1900MHz RF RF Input Power Range –63 to –2 dBm Dynamic Range (Note 3) ±3dB Linearity Error, T = –40°C to 85°C 61 dB A Output Slope 31 36.6 43 mV/dB Output Variation vs Temperature P = –48dBm to –14dBm, T = –40°C to 85°C 0.012 dB/°C IN A Output Intercept 50Ω External Termination, T = –40°C to 85°C –70 –64 –58 dBm A f = 2500MHz RF RF Input Power Range –63 to –3 dBm Dynamic Range (Note 3) ±3dB Linearity Error, T = –40°C to 85°C 60 dB A 5534fc 2

LT5534 ELECTRICAL CHARACTERISTICS V = 3V, EN = 3V, T = 25°C, source impedance = 50Ω, unless otherwise CC A noted. Test circuit shown in Figure 1. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Output Slope 35 mV/dB Output Variation vs Temperature P = –48dBm to –14dBm, T = –40°C to 85°C 0.025 dB/°C IN A Output Interface Output DC Voltage No RF Input Signal 0 142 380 mV Output Impedance 32 Ω Output Bandwidth 30 MHz Full-Scale Setting Time Input from No Signal to –2dBm, to 90% 38 ns Sinking/Sourcing 10/200 mA/µA V = 3V, EN = 3V, T = 25°C, unless otherwise noted. Test circuit shown in Figure 1. (Note 2) CC A PARAMETER CONDITIONS MIN TYP MAX UNITS Power Up/Down Turn-On Time 200 ns Turn-Off Time 800 ns EN = High (On) 0.9 V EN = Low (Off) 0.6 V Power Supply Supply Voltage 2.7 5.25 V Supply Current EN = High 5 7 9 mA Shutdown Current EN = Low 0.1 10 µA Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 3: The linearity error is calculated by the difference between the may cause permanent damage to the device. Exposure to any Absolute incremental slope of the output and the average output slope from Maximum Rating condition for extended periods may affect device –48dBm to –14dBm. The dynamic range is defined as the range over reliability and lifetime. which the linearity error is within ±3dB. Note 2: Specifications over the –40°C to 85°C temperature range are assured by design, characterization and correlation with statistical process control. TTYYPPIICCAALL PPEERRFFOORRMMAANNCCEE CCHHAARRAACCTTEERRIISSTTIICCSS (Test circuit shown in Figure 1) Output Voltage vs Frequency Linearity Error vs Frequency Output Voltage vs RF Input Power 2.8 3 2.4 3 VCC = 3V 50MHz VCC = 3V VCC = 3V 2.4 TA = 25°C 2 TA = 25°C 2.0 AT 50MHz 2 900MHz 900MHz 2.0 50MHz 1.9GHz R (dB) 1 1.6 1 LINEA O R V (V)OUT 11..62 2.5GHz ARITY ERR 0 2.5GHz 1.9GHz V (V)OUT1.2 0 ITY ERROR 0.8 LINE–1 0.8 –1 (dB) 0.4 –2 0.4 TA = 25°C –2 TA = 85°C TA = –40°C 0 –3 0 –3 –70 –60 –50 –40 –30 –20 –10 0 –70 –60 –50 –40 –30 –20 –10 0 –60 –50 –40 –30 –20 –10 0 RF INPUT POWER (dBm) RF INPUT POWER (dBm) RF INPUT POWER (dBm) 5534 G01 5534 G02 5534 G03 5534fc 3

LT5534 TYPICAL PERFORMANCE CHARACTERISTICS (Test circuit shown in Figure 1) V Variation vs RF Input Power Output Voltage vs RF Input Power OUT 3 2.4 3 VCC = 3V AT 50MHz VCC = 3V NORMALIZED AT 25°C AT 900MHz 2 2.0 2 B) LIN N (d 1 TA = –40°C 1.6 1 EAR VARIATIO 0 TA = 85°C V (V)OUT 1.2 0 ITY ERRO OUT –1 0.8 –1 R (d V B ) –2 0.4 TA = 25°C –2 TA = 85°C TA = –40°C –3 0 –3 –60 –50 –40 –30 –20 –10 0 –60 –50 –40 –30 –20 –10 0 RF INPUT POWER (dBm) RF INPUT POWER (dBm) 5534 G05 5534 G04 V Variation vs RF Input Power Output Voltage vs RF Input Power OUT 3 2.4 3 VCC = 3V AT 900MHz VCC = 3V NORMALIZED AT 25°C AT 1.9GHz 2 2.0 2 B) LIN N (d 1 TA = –40°C 1.6 1 EAR VARIATIO 0 TA = 85°C V (V)OUT1.2 0 ITY ERRO OUT –1 0.8 –1R (d V B ) –2 0.4 TA = 25°C –2 TA = 85°C TA = –40°C –3 0 –3 –60 –50 –40 –30 –20 –10 0 –60 –50 –40 –30 –20 –10 0 RF INPUT POWER (dBm) RF INPUT POWER (dBm) 5534 G07 5534 G06 V Variation vs RF Input Power Output Voltage vs RF Input Power OUT 3 2.4 3 VCC = 3V AT 1.9GHz VCC = 3V NORMALIZED AT 25°C AT 2.5GHz 2 2.0 2 B) LIN N (d 1 TA = 85°C 1.6 1 EAR VARIATIO 0 TA = –40°C V (V)OUT1.2 0 ITY ERRO OUT –1 0.8 –1R (d V B ) –2 0.4 TA = 25°C –2 TA = 85°C TA = –40°C –3 0 –3 –60 –50 –40 –30 –20 –10 0 –60 –50 –40 –30 –20 –10 0 RF INPUT POWER (dBm) RF INPUT POWER (dBm) 5534 G09 5534 G08 5534fc 4

LT5534 TYPICAL PERFORMANCE CHARACTERISTICS (Test circuit shown in Figure 1) Output Voltage vs RF Input Power Output Voltage Distribution V Variation vs RF Input Power at V = 3V and 5V vs Temperature OUT CC 3 2.8 35 VCC = 3V AT 2.5GHz TA = 25°C RF PIN = –48dBm AT 1.9GHz TA = 25°C 2 NORMALIZED AT 25°C 2.4 %) 30 VCC = 3V TTAA == –8450°C°C 50MHz N ( dB) 1 2.0 VCC = 3V, 5V TIO 25 N ( TA = –40°C BU V VARIATIOOUT –10 TA = 85°C V (V)OUT 110...628 1V.C9CG =H z3V, 5V ENTAGE DISTRI 211005 C R –2 0.4 PE 5 –3 0 0 –60 –50 –40 –30 –20 –10 0 –60 –50 –40 –30 –20 –10 0 0.540.560.58 0.6 0.620.640.660.68 0.7 RF INPUT POWER (dBm) RF INPUT POWER (dBm) 5534 G11 VOUT (V) 5534 G10 5534 G12 Output Voltage Distribution vs Temperature Supply Voltage vs Supply Current 40 10 RF PIN = –14dBm AT 1.9GHz TA = 25°C 35 VCC = 3V TA = –40°C %) TA = 85°C 9 CENTAGE DISTRIBUTION ( 2131200055 SUPPLY CURRENT (mA) 678 TTTAAA === –824550°°°CCC R PE 5 5 0 4 1.79 1.81 1.83 1.85 1.87 1.89 1.91 1.93 2.5 3 3.5 4 4.5 5 5.5 VOUT (V) SUPPLY VOLTAGE (V) 5534 G13 5530 G14 RF Input Return Loss vs Frequency Output Transient Response 0 –5 1V/DIV dB)–10 VOUT S ( S O L–15 N R U T RE–20 RF PULSED RF INPUT 0dBm AT 100MHz –25 –30 0 0.5 1 1.5 2 2.5 3 50ns/DIV 5534 G16 RF INPUT FREQUENCY (GHz) 5534 G15 5534fc 5

LT5534 PIN FUNCTIONS EN (Pin 1): Enable. When the input voltage is higher than V (Pin 4): Power Supply. This pin should be decoupled CC 0.9V, the circuit is completely turned on. When the input using 100pF and 0.1µF capacitors. voltage is less than 0.6V, the circuit is turned off. RF (Pin 6): RF Input. This pin is internally biased to GND (Pins 2, 5): Ground. V – 0.18V. A coupling capacitor must be used to connect CC to the RF signal source. V (Pin 3): RF Detector Output. OUT BLOCK DIAGRAM 4 VCC DET DET DET DET DET + VOUT RF LIMITER RF LIMITER RF LIMITER RF LIMITER 3 RF – 6 VREF OFFSET COMP BIAS GND EN 2 5 1 5534 BD TEST CIRCUIT C1 1nF 1 6 J1 EN EN RF LT5534 R1 RF R2 2 5 47Ω 0Ω GND GND OPTIONAL OPTIONAL 3 4 VOUT VOUT VCC VCC C5 C3 C2 OPTIONAL 100pF 0.1µF 5534 F01 REF DES VALUE SIZE PART NUMBER C1 1nF 0402 AVX 04025C102JAT2A C2 0.1µF 0603 TAIYO YUDEN TMK107BJ104KA C3 100pF 0603 AVX 06035C101KAT2A C5 0603 OPTIONAL R1 47Ω 0402 OPTIONAL R2 0Ω 0603 OPTIONAL Figure 1. Evaluation Circuit Schematic 5534fc 6

LT5534 TEST CIRCUIT Figure 2. Component Side Silkscreen of Evaluation Board Figure 3. Component Side Layout of Evaluation Board APPLICATIONS INFORMATION The LT5534 is a logarithmic-based detector, capable of Table 1. RF Input Impedance measuring an RF signal over the frequency range from FREQUENCY INPUT S11 50MHz to 3GHz. The 60dB linear dynamic range is (MHz) IMPEDANCE (Ω) MAG ANGLE (DEG) achieved with very stable output over the full temperature 50 1429-j429 0.938 –1.1 range from –40°C to 85°C. The absolute variation over 100 947-j710 0.934 –2.9 temperature is typically within ±1dB over a 47dB dynamic 200 509-j609 0.922 –5.6 range at 1.9GHz. 400 250-j440 0.908 –9.9 600 149-j344 0.900 –14.1 RF Input Port 800 96.8-j278 0.896 –18.3 The RF port is internally biased at V -0.18V. The pin 1000 67.6-j229 0.893 –22.7 CC should be DC blocked when connected to ground or other 1200 49.7-j193 0.889 –27.3 matching components. A 47Ω resistor (R1) connected to 1400 38.4-j165 0.883 –32.3 ground will provide better than 10dB input return loss up 1600 30.8-j143 0.879 –37.3 to 2.5GHz. An additional 2nH inductance in series with 1800 25.4-j125 0.873 –42.6 R1 will provide improved input matching up to 3GHz. 2000 21.4-j109 0.866 –48.0 The impedance vs frequency of the RF input is detailed 2200 18.5-j96.2 0.862 –53.6 in Table 1. 2400 16.6-j85.0 0.848 –59.6 2600 15.2-j75.7 0.834 –65.6 The approximate linear RF input power range of the LT5534 2800 13.7-j67.5 0.826 –71.8 is from –62dBm to –2dBm with a 50Ω source impedance. 3000 12.1-j60.1 0.822 –78.2 However, this range can be adjusted either upward or 5534fc 7

LT5534 APPLICATIONS INFORMATION downward to tailor for a particular application need. By When the output is terminated with a load capacitance simply inserting an attenuator in front of the RF input, the C , the slew rate is then limited to 200µA/(C + 1.5pF). L L power range is shifted higher by the amount of the attenu- For example, the slew rate is reduced to 17.4V/µs when ation. Moreover, due to the high RF input impedance of C = 10pF. A capacitive load may result in output voltage L the LT5534, the detecting range can be moved downward overshoot, which can be minimized with a series compen- for better detection sensitivity by using a narrow band sation resistor R2, as shown in Figure 1. The suggested L-C matching network. By this means, the sensitivity of resistor values for various capacitive loads are listed in the detector can be extended to as low as –75dBm. By Table 2. changing the value of resistor R1, the sensitivity of the Table 2. Resistor Value for Capacitive Output detector can be fine-tuned within the range from –75dBm C5 (pF) R2 (kΩ) to –62dBm. Though the range is adjustable, the overall 1.5 5 linear dynamic range remains the same. 5 4 Output Interface 10 2.5 20 2 The output interface of the LT5534 is shown in Figure 4. The output currents from the RF detectors are summed and converted into an output voltage, V . The maximum The optional RC network at the output (R2 and C5 on the OUT charging current available to the output load is about demo board) can also provide further output filtering, if 200µA. The internal compensation capacitor C is used needed. The output bandwidth is primarily dictated by the C to guarantee stable operation for a large capacitive output RC constant of this lowpass filter when its corner frequency load. The slew rate is 133V/µs, and the small-signal output is less than 30MHz. bandwidth is approximately 30MHz when the output is When a large signal (e.g., –2dBm) is present at the RF resistively terminated or open. The fastest output transient input port, the output voltage swing can be as high as response is achieved when a large signal is applied to the 2.4V. To assure proper operation of the chip, the minimum RF input port. See the Output Transient Response plot in resistive load at the output termination should be greater the Typical Performance Characteristics section. than 18kΩ. VCC + 200µA + CC VOUT – 5534 F04 OUTPUT CURRENTS FROM RF DETECTORS Figure 4. Simplified Circuit Schematic of the Output Interface 5534fc 8

LT5534 REVISION HISTORY (Revision history begins at Rev B) REV DATE DESCRIPTION PAGE NUMBER B 8/10 Revised Output DC Voltage minimum and maximum values in Electrical Characteristics section 3 Updated package drawing in Package Description section 10 C 12/10 Corrected part numbers in Order Information 2 5534fc Information furnished by Linear Technology Corporation is believed to be accurate and reliable. 9 However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

LT5534 PACKAGE DESCRIPTION SC6 Package 6-Lead Plastic SC70 (Reference LTC DWG # 05-08-1638 Rev B) 0.47 0.65 1.80 – 2.20 MAX REF (NOTE 4) 1.00 REF INDEX AREA (NOTE 6) 2.8 BSC 1.8 REF 1.80 – 2.40 1(.1N5O T–E 1 4.3)5 PIN 1 RECOMMENDED SOLDER PAD LAYOUT 0.15 – 0.30 0.65 BSC PER IPC CALCULATOR 6 PLCS (NOTE 3) 0.10 – 0.40 0.80 – 1.00 0.00 – 0.10 REF 1.00 MAX GAUGE PLANE 0.15 BSC 0.26 – 0.46 0.10 – 0.18 SC6 SC70 1205 REV B (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 6. DETAILS OF THE PIN 1 IDENTIFIER ARE OPTIONAL, 2. DRAWING NOT TO SCALE BUT MUST BE LOCATED WITHIN THE INDEX AREA 3. DIMENSIONS ARE INCLUSIVE OF PLATING 7. EIAJ PACKAGE REFERENCE IS EIAJ SC-70 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 8. JEDEC PACKAGE REFERENCE IS MO-203 VARIATION AB 5. MOLD FLASH SHALL NOT EXCEED 0.254mm RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT5504 800MHz to 2.7GHz RF Measuring Receiver 80dB Dynamic Range, Temperature Compensated, 2.7V to 5.25V Supply LT5506 500MHz Quadrature IF Demodulator with VGA 1.8V to 5.25V Supply, 40MHz to 500MHz IF, –4dB to 57dB Linear Power Gain, 8.8MHz Baseband Bandwidth LT5511 High Linearity Upconverting Mixer RF Output to 3GHz, 17dBm IIP3, Integrated LO Buffer LT5512 DC-3GHz High Signal Level Downconverting Mixer DC to 3GHz, 21dBm IIP3, Integrated LO Buffer LT5515 1.5GHz to 2.5GHz Direct Conversion Quadrature Demodulator 20dBm IIP3, Integrated LO Quadrature Generator LT5516 0.8GHz to 1.5GHz Direct Conversion Quadrature Demodulator 21.5dBm IIP3, Integrated LO Quadrature Generator LT5517 40MHz to 900MHz Direct Conversion Quadrature Demodulator 21dBm IIP3, Integrated LO Quadrature Generator LT5519 0.7GHz to 1.4GHz High Linearity Upconverting Mixer 17.1dBm IIP3, 50Ω Single-Ended RF and LO Ports LT5520 1.3GHz to 2.3GHz High Linearity Upconverting Mixer 15.9dBm IIP3, 50Ω Single-Ended RF and LO Ports LT5522 600MHz to 2.7GHz High Linearity Downconverting Mixer 4.5V to 5.25V Supply, 25dBm IIP3 at 900MHz, NF = 12.5dB, 50Ω Single-Ended RF and LO Ports LTC®5532 300MHz to 7GHz Precision RF Power Detector Precision V Offset Control, Adjustable Gain and Offset OUT LT5546 500MHz Quadrature IF Demodulator with VGA and 17MHz 17MHz Baseband Bandwidth, 40MHz to 500MHz IF, 1.8V to 5.25V Baseband Bandwidth Supply, –7dB to 56dB Linear Power Gain 5534fc 10 Linear Technology Corporation LT 1210 REV C • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com  LINEAR TECHNOLOGY CORPORATION 2004

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: A nalog Devices Inc.: LT5534ESC6#PBF LT5534ESC6#TRMPBF LT5534ESC6#TRPBF LT5534ESC6 LT5534ESC6#TRM LT5534ESC6#TR