F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz GENERAL DESCRIPTION FEATURES The F2250 is a low insertion loss Voltage Variable RF Attenuator (VVA) designed for a multitude of wireless and other RF applications. This device covers a broad frequency range from 50MHz to 6000MHz. In addition to providing low insertion loss, the F2250 provides excellent linearity performance over its entire voltage control and attenuation range. The F2250 uses a single positive supply voltage of 3.15V to 5.25V. Other features include the VMODE pin allowing either positive or negative voltage control slope vs attenuation and multi-directional operation meaning the RF input can be applied to either RF1 or RF2 pins. Control voltage ranges from 0V to 3.6V using either positive or negative control voltage slope. Control Insertion Loss @ 2000MHz: 1.4dB vs. 2.8dB Insertion Loss @ 6000MHz: 2.7dB vs. 7dB Maximum Attenuation Slope: 33dB/Volt vs. 53dB/Volt Minimum Return Loss up to 6000MHz: 12.5dB vs. 7dB Minimum Output IP3: 31dBm vs. 15dBm Minimum Input IP2: 87dBm vs. 80dBm Maximum Operating Temperature: +105°C vs. +85°C RF2 RF1 ORDERING INFORMATION Tape & Reel 0.9 mm height package APPLICATIONS F2250NLGK8 Base Station 2G, 3G, 4G Portable Wireless Repeaters and E911 systems Digital Pre-Distortion Point to Point Infrastructure Public Safety Infrastructure WIMAX Receivers and Transmitters Military Systems, JTRS radios RFID handheld and portable readers Cable Infrastructure Wireless LAN Test / ATE Equipment Voltage Variable RF Attenuator VDD VMODE F2250 provides extremely low insertion loss and superb IP3, IP2, Return Loss and Slope Linearity across the control range. Comparing to the previous state-of-theart for silicon VVAs this device is better as follows: VCTRL DEVICE BLOCK DIAGRAM COMPETITIVE ADVANTAGE Low Insertion Loss: 1.4dB @ 2000MHz Typical / Min IIP3: 65dBm / 47dBm Typical / Min IIP2: 95dBm / 87dBm 33.6dB Attenuation Range Bi-directional RF ports +34.4dBm Input P1dB compression VMODE pin allows either positive or negative attenuation control response Linear-in-dB attenuation characteristic Supply voltage: 3.15V to 5.25V VCTRL range: 0V to 3.6V using 5V supply +105°C max operating temperature 3mm x 3mm, 16-pin QFN package Green RF Product Line Temp Range PART# MATRIX Part# 1 RF Freq Range (MHz) Insertion Loss (dB) (dBm) F2250 50 - 6000 F2255 F2258 IIP3 Pinout Compatibility 1.4 (at 2GHz) +65 RFMD 1 - 3000 1.1 (at 500MHz) +60 50 - 6000 1.4 (at 2GHz) +65 Hittite REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz ABSOLUTE MAXIMUM RATINGS Parameter / Condition VDD to GND VMODE to GND VCTRL to GND VDD = 0V to 5.25V RF1, RF2 to GND RF1 or RF2 Input Power applied for 24 hours maximum (VDD applied @ 2GHz and +85°C) RF1 or RF2 Continuous Operating Power Maximum Junction Temperature Storage Temperature Range Lead Temperature (soldering, 10s) ESD Voltage– HBM (Per ESD STM5.1-2007) ESD Voltage – CDM (Per ESD STM5.3.1-2009) Symbol VDD VMODE VCTRL VRF Min -0.3 -0.3 -0.3 -0.3 Max 5.5 Minimum ( VDD, 3.9 ) Minimum ( VDD, 4.0 ) 0.3 Units V V V V PMAX24 30 dBm PMAX_OP TJMAX TST TLEAD VESDHBM VESDCDM See Figure 1 +150 +150 +260 Class 1C Class C3 dBm °C °C °C -65 FIGURE 1: MAXIMUM RF INPUT POWER VS. RF FREQUENCY Stresses above those listed above may cause permanent damage to the device. Functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL AND MOISTURE CHARACTERISTICS ΘJA (Junction – Ambient) ΘJC (Junction – Case) The Case is defined as the exposed paddle Moisture Sensitivity Rating (Per J-STD-020) Voltage Variable RF Attenuator 2 80.6°C/W 5.1°C/W MSL 1 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz F2250 OPERATING CONDITIONS Parameter Symbol Operating Freq Range Supply Voltage VDD > 3.9V VDD = 3.15V to 3.9V VIH VMODE Logic Condition FRF VDD VIL VCTRL Range VCTRL Supply Current Logic Current ICTRL Current RF Operating Power VDD = 3.9V to 5.25V VDD = 3.15V to 3.9V IDD IMODE ICTRL 3 RF1 Port Impedance RF2 Port Impedance Operating Temperature Range PMAX, Min Typ 50 3.15 1.17 1.17 0 0 0 0.5 1 -1 -1 TCASE Units 6000 5.25 3.6 2 VDD -0.3 0.63 3.6 VDD-0.3 MHz V -40 V mA μA μA See Figure 1 dBm 50 50 Exposed Paddle Temperature V 2 38 14 1.17 CW ZRF1 ZRF2 Max Ω +105 °C Operating Conditions Notes: 1 – Items in min/max columns in bold italics are Guaranteed by Test. 2 – Items in min/max columns that are not bold/italics are Guaranteed by Design Characterization. 3 – Refer to the Maximum Operating RF Input Power vs. RF Frequency curves in Figure 1. Voltage Variable RF Attenuator 3 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz F2250 SPECIFICATION Refer to EVKit / Applications Circuit, VDD = +3.3V, TC = +25°C, signals applied to RF1 input, FRF = 2000MHz, minimum attenuation, PIN = 0dBm for small signal parameters, +20dBm for single tone linearity tests, +20dBm per tone for two tone tests, two tone delta frequency = 50MHz, PCB board traces and connector losses are de-embedded unless otherwise noted. Refer to Typical Operating Curves for performance over entire frequency band. Parameter Symbol Insertion Loss, IL (Minimum Attenuation) AMIN Maximum Attenuation AMAX ΦΔMAX Insertion Phase Δ ΦΔMID Input 1dB Compression 3 S11 Minimum RF2 Return Loss over control voltage range S22 Input IP3 Input IP3 over Attenuation Minimum Output IP3 IIP3 IIP3ATTEN OIP3MIN Minimum Input IP2 Input IH2 Input IH3 Settling Time Min 2GHz 3GHz 6GHz 34 2 At 36dB attenuation relative to Insertion Loss At 18dB attenuation relative to Insertion Loss IIP2 IIP2MIN HD2 HD3 TSETTL0.1dB Max 1.4 1.6 2.6 35 1.9 1 Units dB 3.1 dB deg 10 50MHz 4 700MHz 2000MHz 6000MHz 50MHz 4 700MHz 2000MHz 6000MHz All attenuation settings Maximum attenuation PIN + IM2dBC, IM2 term is F1+F2 All attenuation settings PIN + H2dBc PIN + (H3dBc/2) Any 1dB step in the 0dB to 33dB control range 50% VCTRL to RF settled to within ± 0.1dB Typ 27 P1dB Minimum RF1 Return Loss over control voltage range Input IP2 Comment 44 34.4 16 17 17 15 16 15 16 13 65 47 35 dBm 95 dBm 87 90 54 dBm dBm dBm 15 µsec dB dB dBm Specification Notes: 1 – Items in min/max columns in bold italics are Guaranteed by Test. 2 – Items in min/max columns that are not bold/italics are Guaranteed by Design Characterization. 3 – The input 1dB compression point is a linearity figure of merit. Refer to Absolute Maximum Ratings section. along with Figure 1 for the maximum RF input power vs. RF frequency. 4 – Set blocking capacitors C7 & C8 to 0.01uF to achieve best return loss performance at 50MHz. Voltage Variable RF Attenuator 4 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS Unless otherwise noted, the following conditions apply: VDD = +3.3V or +5.0V TC = +25ºC VMODE = 0V RF trace and connector losses are de-embedded for S-parameters Pin = 0dBm for all small signal tests Pin = +20dBm for single tone linearity tests (RF1 port driven) Pin = +20dBm/tone for two tone linearity tests (RF1 port driven) Two tone frequency spacing = 50MHz Voltage Variable RF Attenuator 5 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS [S2P BROADBAND PERFORMANCE] (-1-) Attenuation vs. VCTRL Attenuation vs. Frequency 0 0 -10 -10 Attenuation (dB) Attenuation (dB) -5 0.9GHz / Vmode = 0V 0.9GHz / Vmode = 3V -15 2.0GHz / Vmode = 0V 2.0GHz / Vmode = 3V -20 3.0GHz / Vmode = 0V 3.0GHz / Vmode = 3V -25 -30 -20 -30 -40 -35 -40 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -50 2.2 2.4 2.6 Vctrl = 0.8V Vctrl = 1.0V Vctrl = 1.2V Vctrl = 1.4V Vctrl = 1.6V Vctrl = 1.8V Vctrl = 2.4V 0 VCTRL (V) 1 2 3 4 5 6 7 8 9 Frequency (GHz) Min. & Max. Attenuation vs. Frequency 0 Attenuation Delta to 25C vs. Frequency 3.00 -20 -40C / Vctrl = 0.0V 2.50 105C / Vctrl = 0.0V -25 -40C / Vctrl = 3.0V 25C / Vctrl = 3.0V 105C / Vctrl = 3.0V -2 -30 -3 -35 -4 -40 -5 -45 -6 -50 Max. Attenuation (dB) -1 Attenuation Delta to 25C (dB) 25C / Vctrl = 0.0V Min. Attenuation (dB) Vctrl = 0.0V 2.00 -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz 1.50 1.00 0.50 0.00 -0.50 -1.00 -1.50 -2.00 -2.50 0 1 2 3 4 5 6 7 8 -3.00 9 0.0 Frequency (GHz) Voltage Variable RF Attenuator 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 VCTRL (V) 6 REV 4, January 2017 2.4 2.6 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CURVES [S2P vs. VCTRL] (-2-) Attenuation vs. VCTRL Attenuation Slope vs. VCTRL 0 0.4GHz 45 0.7GHz -5 0.7GHz 1.5GHz Attenuation Slope (dB/V) 1.5GHz 2.7GHz -10 Attenuation (dB) 50 0.4GHz 4.0GHz 5.0GHz -15 6.0GHz -20 -25 -30 -35 40 2.7GHz 4.0GHz 35 5.0GHz 30 6.0GHz 25 20 15 10 5 -40 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0.5 0.7 0.9 1.1 VCTRL (V) RF1 Return Loss vs. VCTRL 1.7 1.9 0 0.4GHz 0.7GHz -5 2.1 1.5GHz 2.7GHz -10 4.0GHz 5.0GHz -15 0.4GHz 0.7GHz -5 RF2 Return Loss (dB) RF1 Return Loss (dB) 1.5 RF2 Return Loss vs. VCTRL 0 6.0GHz -20 -25 -30 1.5GHz 2.7GHz -10 4.0GHz 5.0GHz -15 6.0GHz -20 -25 -30 -35 -35 -40 -40 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 100 0.4GHz 0.7GHz Insertion Phase Slope (deg/V) 1.5GHz 2.7GHz 50 4.0GHz 5.0GHz 40 6.0GHz 30 20 10 0 -10 0.0 0.2 0.4 2.6 0.4GHz (positive phase = electrically shorter) 0.7GHz 60 2.4 Insertion Phase Slope vs. VCTRL Insertion Phase vs. VCTRL 70 2.2 VCTRL (V) VCTRL (V) Insertion Phase (deg) 1.3 VCTRL (V) 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.7GHz 4.0GHz 60 5.0GHz 6.0GHz 40 20 0 -20 2.6 0.6 VCTRL (V) Voltage Variable RF Attenuator 1.5GHz 80 0.8 1.0 1.2 1.4 1.6 1.8 2.0 VCTRL (V) 7 REV 4, January 2017 2.2 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS [S2P VS. VCTRL & TEMPERATURE] (-3-) Attenuation Response vs. VCTRL Attenuation Slope vs. VCTRL 0 -40C / 0.9GHz 25C / 0.9GHz 45 25C / 0.9GHz -5 105C / 0.9GHz Attenuation Slope (dB/V) 105C / 0.9GHz -40C / 2.0GHz -10 Attenuation (dB) 50 -40C / 0.9GHz 25C / 2.0GHz 105C / 2.0GHz -15 -40C / 3.0GHz 25C / 3.0GHz -20 105C / 3.0GHz -25 -30 40 -40C / 2.0GHz 25C / 2.0GHz 35 105C / 2.0GHz 30 -40C / 3.0GHz 25C / 3.0GHz 25 105C / 3.0GHz 20 15 10 (positive phase = electrically shorter) -35 5 -40 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0.6 0.8 1.0 1.2 VCTRL (V) 1.8 2.0 2.2 0 0 -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 25C / 0.9GHz 25C / 2.0GHz 25C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz -5 RF2 Return Loss (dB) -5 RF1 Return Loss (dB) 1.6 RF2 Return Loss vs. VCTRL RF1 Return Loss vs. VCTRL -10 -15 -20 -25 -30 -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 25C / 0.9GHz 25C / 2.0GHz 25C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz -10 -15 -20 -25 -30 -35 -35 -40 -40 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 VCTRL (V) VCTRL (V) Insertion Phase Slope vs. VCTRL Insertion Phase vs. VCTRL 50 70 -40C / 0.9GHz Insertion Phase Slope (deg/V) 25C / 0.9GHz 45 105C / 0.9GHz Insertion Phase (deg) 1.4 VCTRL (V) 40 -40C / 2.0GHz 25C / 2.0GHz 35 105C / 2.0GHz -40C / 3.0GHz 30 25C / 3.0GHz 25 105C / 3.0GHz 20 15 10 5 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 -40C / 2.0GHz -40C / 3.0GHz 25C / 0.9GHz 25C / 2.0GHz 25C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz 50 40 30 20 10 0 2.6 0.6 VCTRL (V) Voltage Variable RF Attenuator 60 -40C / 0.9GHz 0.8 1.0 1.2 1.4 1.6 1.8 2.0 VCTRL (V) 8 REV 4, January 2017 2.2 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS [S2P VS. ATTENUATION & TEMPERATURE] (-4-) RF1 Return Loss vs. Attenuation 0 RF1 Return Loss vs. Attenuation (positive phase = electrically shorter) 0 0.4GHz -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 25C / 0.9GHz 25C / 2.0GHz 25C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz 0.7GHz -5 -5 1.5GHz RF1 Return Loss (dB) RF1 Return Loss (dB) 2.7GHz 4.0GHz -10 5.0GHz 6.0GHz -15 -20 -25 -30 -10 -15 -20 -25 -30 -35 -35 -40 -40 0 4 8 12 16 20 24 28 32 0 36 4 8 16 20 24 28 32 0 0 0.4GHz 0.7GHz -5 -5 1.5GHz RF2 Return Loss (dB) 2.7GHz 4.0GHz -10 5.0GHz 6.0GHz -15 -20 -25 -30 -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 25C / 0.9GHz 25C / 2.0GHz 25C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz -10 -15 -20 -25 -30 -35 -35 -40 -40 0 4 8 12 16 20 24 28 32 0 36 8 12 16 20 24 28 32 Insertion Phase Δ vs. Attenuation Insertion Phase Δ vs. Attenuation 70 4 Attenuation (dB) Attenuation (dB) 0.4GHz 0.7GHz 60 1.5GHz 2.7GHz Insertion Phase (deg) 36 RF2 Return Loss vs. Attenuation RF2 Return Loss vs. Attenuation RF2 Return Loss (dB) 12 Attenuation (dB) Attenuation (dB) 4.0GHz 50 5.0GHz 6.0GHz 40 30 20 10 0 -10 0 4 8 12 16 20 24 28 32 36 Attenuation (dB) Voltage Variable RF Attenuator 9 REV 4, January 2017 36 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS [S2P VS. FREQUENCY] (-5-) Min. & Max. Attenuation Slope vs. Frequency -23 -1 -25 -2 -27 -3 -29 -4 -31 -5 -33 -6 -35 -7 -40C / Vctrl = 0V 25C / Vctrl = 0V 105C / Vctrl = 0V -40C / Vctrl = 3V 25C / Vctrl = 3V 105C / Vctrl = 3V 50 -37 -8 Min./Max. Atenuation Slope (dB/V) 0 Max. Attenuation (dB) Min. Attenuation (dB) Min. & Max. Attenuation vs. Frequency -39 0 1 2 3 4 5 Max. Slope 45 Min. Slope 40 35 VCTRL varied from 0.8V to 1.8V 30 25 20 15 10 6 0 1 2 Frequency (GHz) Worst-Case RF1 Return Loss vs. Frequency 5 6 0 -40C Worst-Case RF2 Return Loss (dB) Worst-Case RF1 Return Loss (dB) 4 Worst-Case RF2 Return Loss vs. Frequency 0 25C 105C -5 -10 -15 -20 -25 -40C 25C 105C -5 -10 -15 -20 -25 0 1 2 3 4 5 6 0 1 2 Frequency (GHz) 70 4 5 500MHz 6 Gain Compression vs. Frequency 1 -40C 25C 60 3 Frequency (GHz) Max. Insertion Phase vs. Frequency 105C 0.5 50 Gain Compression (dB) Max. Insertion Phase (deg) 3 Frequency (GHz) 40 30 20 10 (positive phase = electrically shorter) 0 -10 50MHz 100MHz 200MHz 400MHz 1000MHz 2000MHz 4000MHz 6000MHz 0 -0.5 -1 -1.5 -2 0 1 2 3 4 5 6 Frequency (GHz) Voltage Variable RF Attenuator 14 16 18 20 22 24 26 28 30 32 34 36 RF Input Power (dBm) 10 REV 4, January 2017 38 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS [S2P @ LOW FREQUENCY, GROUP DELAY] (-6-) Min. & Max. Attenuation vs. Low Frequency 0 -40C / Vctrl = 0V -40C / Vctrl = 3V 25C / Vctrl = 0V 25C / Vctrl = 3V Low-Frequency Attenuation vs. VCTRL 25C / 43MHz 105C / 43MHz -14 (C7,C8 set to 0.1uF) -3 -22 -10 Attenuation (dB) -18 -40C / 128MHz Max. Attenuation (dB) -2 105C / 128MHz -30 -6 -34 -35 -38 -40 100 200 300 Frequency (MHz) 400 -5 -30 -40C / 43MHz 25C / 43MHz 105C / 43MHz -40C / 128MHz 25C / 128MHz 105C / 128MHz -40C / 255MHz 25C / 255MHz 105C / 255MHz (C7,C8 set to 0.1uF) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 VCTRL (V) 2 2.2 2.4 2.6 Low-Frequency RF2 Return Loss vs. VCTRL 0 -5 RF2 Return Loss (dB) -10 -15 -20 -25 -30 (C7,C8 set to 0.1uF) -35 -25 500 Low-Frequency RF1 Return Loss vs. VCTRL 0 105C / 255MHz -20 -5 0 -40C / 255MHz 25C / 255MHz -26 -7 25C / 128MHz -15 -4 RF1 Return Loss (dB) -40C / 43MHz -5 -1 Min. Attenuation (dB) 0 -10 105C / Vctrl = 0V 105C / Vctrl = 3V -40C / 43MHz 25C / 43MHz 105C / 43MHz -40C / 128MHz 25C / 128MHz 105C / 128MHz -40C / 255MHz 25C / 255MHz 105C / 255MHz -10 -15 -20 -25 -30 (C7,C8 set to 0.1uF) -35 -40 -40 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 VCTRL (V) 2 0 2.2 2.4 2.6 Worst-Case Return Loss vs. Low Frequency 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 VCTRL (V) 2 2.2 2.4 2.6 Group Delay vs. VCTRL 0 -40C /RF1 Worst-Case Return Loss (dB) 25C / RF1 105C / RF1 -40C / RF2 -5 25C / RF2 105C / RF2 (C7,C8 set to 0.1uF) -10 -15 -20 0 100 200 300 400 500 Frequency (MHz) Voltage Variable RF Attenuator 11 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. VCTRL, VMODE] (-7-) Input IP3 vs. VCTRL Output IP3 vs. VCTRL 80 75 75 70 65 60 65 60 55 50 -40C / Vmode = 0V 45 25C / Vmode = 0V 105C / Vmode = 0V 40 55 Output IP3 (dBm) Input IP3 (dBm) 70 50 45 40 35 -40C / Vmode= 3V 35 25C / Vmode= 3V 105C / Vmode= 3V 30 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 -40C / Vmode = 0V 30 25C / Vmode = 0V 25 105C / Vmode = 0V 20 -40C / Vmode= 3V 15 25C / Vmode= 3V 105C / Vmode= 3V 10 2.2 2.4 2.6 0 0.2 0.4 0.6 0.8 1 VCTRL (V) Input IP2 vs. VCTRL 2 2.2 2.4 2.6 Output IP2 vs. VCTRL 120 120 110 110 100 Output IP2 (dBm) Input IP2 (dBm) 1.2 1.4 1.6 1.8 VCTRL (V) 90 80 -40C / Vmode = 0V 70 25C / Vmode = 0V -40C / Vmode = 0V 25C / Vmode = 0V 105C / Vmode = 0V -40C / Vmode = 3V 25C / Vmode = 3V 105C / Vmode = 3V 100 90 80 70 105C / Vmode = 0V -40C / Vmode = 3V 60 60 25C / Vmode = 3V 105C / Vmode = 3V 50 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 50 2.2 2.4 2.6 0 0.2 0.4 0.6 0.8 1 VCTRL (V) 2nd Harm Input Intercept Point vs. VCTRL 130 80 120 70 110 60 100 90 40 -40C / Vmode = 0V 30 25C / Vmode = 0V 25C / Vmode = 0V 105C / Vmode = 0V 105C / Vmode = 0V -40C / Vmode = 3V 70 -40C / Vmode = 3V 20 25C / Vmode = 3V 25C / Vmode = 3V 105C / Vmode = 3V 60 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 105C / Vmode = 3V 10 2.2 2.4 2.6 0 VCTRL (V) Voltage Variable RF Attenuator 2.2 2.4 2.6 50 -40C / Vmode = 0V 80 2 3rd Harm Input Intercept Point vs. VCTRL IH3 (dBm) IH2 (dBm) 1.2 1.4 1.6 1.8 VCTRL (V) 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 VCTRL (V) 12 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. VCTRL, RF1/RF2 DRIVEN] (-8-) Input IP3 vs. VCTRL Output IP3 vs. VCTRL 80 75 75 70 65 Output IP3 (dBm) Input IP3 (dBm) 70 60 55 50 -40C / RF1 Driven 45 25C / RF1 Driven 105C / RF1 Driven 40 35 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 105C / RF1 Driven 60 -40C / RF2 Driven 55 25C / RF2 Driven 105C / RF2 Driven 45 40 35 30 25 -40C / RF2 Driven 20 25C / RF2 Driven 15 2 25C / RF1 Driven 65 50 105C / RF2 Driven 30 -40C / RF1 Driven 10 2.2 2.4 2.6 0 0.2 0.4 0.6 0.8 1 VCTRL (V) Input IP2 vs. VCTRL 2 2.2 2.4 2.6 Output IP2 vs. VCTRL 120 120 110 110 Output IP2 (dBm) Input IP2 (dBm) 1.2 1.4 1.6 1.8 VCTRL (V) 100 90 80 -40C / RF1 Driven 70 25C / RF1 Driven -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 90 80 70 105C / RF1 Driven 60 -40C / RF2 Driven 60 25C / RF2 Driven 105C / RF2 Driven 50 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 50 0 2.2 2.4 2.6 0.2 0.4 0.6 0.8 1 80 120 70 110 60 IH3 (dBm) IH2 (dBm) 130 100 90 50 40 30 25C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 20 -40C / RF2 Driven 25C / RF2 Driven 25C / RF2 Driven 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 2.2 2.4 2.6 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 VCTRL (V) VCTRL (V) Voltage Variable RF Attenuator 105C / RF2 Driven 10 105C / RF2 Driven 60 2.2 2.4 2.6 -40C / RF1 Driven -40C / RF1 Driven 70 2 3rd Harm Input Intercept Point vs. VCTRL 2nd Harm Input Intercept Point vs. VCTRL 80 1.2 1.4 1.6 1.8 VCTRL (V) VCTRL (V) 13 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. ATTENUATION] (-9-) Input IP3 vs. Attenuation Output IP3 vs. Attenuation 80 75 65 Output IP3 (dBm) Input IP3 (dBm) 70 60 55 50 45 -40C 40 25C 35 125C 30 0 4 8 12 16 20 24 28 32 75 70 65 60 55 50 45 40 35 30 25 20 15 10 -40C 25C 105C 36 0 4 8 Attenuation (dB) 12 16 20 24 28 32 36 Attenuation (dB) Input IP2 vs. Attenuation Output IP2 vs. Attenuation 120 120 -40C 110 25C 110 Output IP2 (dBm) Input IP2 (dBm) 105C 100 90 80 70 100 90 80 70 -40C 60 60 25C 105C 50 50 0 4 8 12 16 20 24 28 32 36 0 4 8 Attenuation (dB) 16 20 24 28 32 36 Attenuation (dB) 2nd Harm Input Intercept Point vs. Attenuation 3rd Harm Input Intercept Point vs. Attenuation 130 80 120 70 110 60 IH3 (dBm) IH2 (dBm) 12 100 90 80 40 30 -40C 70 50 25C -40C 25C 20 105C 105C 60 10 0 4 8 12 16 20 24 28 32 36 0 Attenuation (dB) Voltage Variable RF Attenuator 4 8 12 16 20 24 28 32 Attenuation (dB) 14 REV 4, January 2017 36 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. ATTEN, RF1/RF2 DRIVEN] (-10-) Input IP3 vs. Attenuation Output IP3 vs. Attenuation 80 75 75 70 -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 65 60 65 Output IP3 (dBm) Input IP3 (dBm) 70 60 55 50 45 -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 40 35 30 0 4 8 12 16 20 24 28 32 55 50 45 40 35 30 25 20 15 10 0 36 4 8 12 16 20 24 28 32 36 Attenuation (dB) Attenuation (dB) Output IP2 vs. Attenuation Input IP2 vs. Attenuation 120 120 110 110 -40C / RF1 Driven 25C / RF2 Driven 105C / RF1 Driven Output IP2 (dBm) Input IP2 (dBm) -40C / RF2 Driven 100 90 80 -40C / RF1 Driven 70 25C / RF1 Driven 25C / RF2 Driven 100 105C / RF2 Driven 90 80 70 105C / RF1 Driven 60 -40C / RF2 Driven 60 25C / RF2 Driven 105C / RF2 Driven 50 0 4 8 12 16 20 24 28 50 32 0 36 4 8 16 20 24 80 120 70 110 60 IH3 (dBm) 130 100 90 -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven -40C / RF2 Driven 20 25C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 60 0 4 8 12 16 20 24 28 32 105C / RF2 Driven 10 36 0 Attenuation (dB) Voltage Variable RF Attenuator 36 40 30 25C / RF1 Driven 70 32 50 -40C / RF1 Driven 80 28 3rd Harm Input Intercept Point vs. Attenuation 2nd Harm Input Intercept Point vs. Attenuation IH2 (dBm) 12 Attenuation (dB) Attenuation (dB) 4 8 12 16 20 24 28 32 Attenuation (dB) 15 REV 4, January 2017 36 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz PACKAGE DRAWING (3X3 16 PIN) Voltage Variable RF Attenuator 16 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz GND 15 14 GND VDD 16 VCTRL VMODE PINOUT & BLOCK DIAGRAM 13 1 12 GND Control NC 2 11 NC RF1 3 10 RF2 NC 4 9 NC Voltage Variable RF Attenuator 17 GND 7 8 GND 6 GND 5 GND E.P. REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz PIN DESCRIPTION Pin Name 1, 5, 6, 7, 8, 12, 13 GND 2, 4, 9, 11 NC 3 RF1 10 RF2 14 VCTRL 15 VDD 16 VMODE — EP Voltage Variable RF Attenuator Function Ground these pins as close to the device as possible. No internal connection. These pins can be left unconnected or connected to ground (recommended). RF Port 1. Matched to 50 ohms. Must use an external AC coupling capacitor as close to the device as possible. For low frequency operation increase the capacitor value to result in a low reactance at the frequency of interest. RF Port 2. Matched to 50 ohms. Must use an external AC coupling capacitor as close to the device as possible. For low frequency operation increase the capacitor value to result in a low reactance at the frequency of interest. Attenuator control voltage. Apply a voltage in the range as specified in the Operating Conditions. See application section for details about VCTRL. Power supply input. Bypass to GND with capacitors close as possible to pin. Attenuator slope control. Set to logic LOW to enable negative attenuation slope. Set to logic HIGH to enable positive attenuation slope. Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses multiple ground vias to achieve the specified RF performance. 18 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz APPLICATIONS INFORMATION Default Start-up VMODE must be tied to either GND or Logic HIGH. If VCTRL pin is left floating, the part will power up in the minimum attenuation state when VMODE = GND, or the maximum attenuation state when V MODE = High. VCTRL The VCTRl pin is used to control the attenuation of the F2250. With VMODE set to a logic low (high) this places the device in a negative (positive) slope mode where increasing (decreasing) voltage produces an increasing (a decreasing) attenuation from min attenuation (max attenuation) to max attenuation (min attenuation) respectively. The VCTRl pin has an on-chip pullup ESD diode so VDD should be applied before VCTRl is applied. If this sequencing is not possible, then resistor R2 should be set for 1kΩ to limit the current into the VCTRL pin. VMODE The VMODE pin is used to set the attenuation vs. VCTRl slope. With VMODE set to logic low (high) this will set the attenuation slope to be negative (positive). A negative (positive) slope is defined as increased (decreased) attenuation with increasing (decreasing) VCTRl voltage. The EVKIT provides and on-board jumper to manually set the VMODE. Installing a jumper on header J2 from VMODE to GND (VHI) to set the device for a negative (positive) slope. RF1 and RF2 Ports The F2250 is a bi-directional device thus allowing RF1 or RF2 to be used as the RF input. As displayed in the Typical Operating Conditions curves, RF1 shows some enhanced linearity performance and therefore should be used as the RF input, if possible, for best results. This F2250 has been designed to accept high RF input power levels, therefore VDD must be applied prior to the application of RF power to ensure reliability. DC blocking capacitors are required on the RF pins and should be set to a value that results in a low reactance over the frequency range of interest. Power Supplies The supply pin should be bypassed with external capacitors to minimize noise and fast transients. Supply noise can degrade noise figure and fast transients can trigger ESD clamps and cause them to fail. Supply voltage change or transients should have a slew rate smaller than 1V/20uS. In addition, all control pins should remain at 0V (+/-0.3V) while the supply voltage ramps or while it returns to zero. Voltage Variable RF Attenuator 19 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz Control Pin Interface If control signal integrity is a concern and clean signals cannot be guaranteed due to overshoot, undershoot, ringing, etc., the following circuit at the input of control pins 14 and 16 is recommended as shown below. VMODE 5Kohm 5Kohm VCTRL 2pf VDD 2pf 16 15 14 13 12 1 Control RF1 2 11 3 10 4 9 5 Voltage Variable RF Attenuator 6 20 7 RF2 8 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz EVKIT/ APPLICATIONS CIRCUIT Voltage Variable RF Attenuator 21 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz EVKIT PICTURE / LAYOUT (TOP SIDE) Short GND pin to VMODE pin to set for negative attenuation slope. For positive attenuation slope move shorting shunt from VMODE to VHI VDD RF2 RF1 VCTRL Voltage Variable RF Attenuator 22 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz EVKIT PICTURE / LAYOUT (BOTTOM SIDE) VDD RF2 RF1 VCTRL Voltage Variable RF Attenuator 23 REV 4, January 2017 F2250NLGK Datasheet Voltage Variable RF Attenuator 50MHz to 6000MHz EVKIT BOM TOP MARKINGS Lot Code 04Y 446L F2250 Assembler Code Date Code [YWW] (Week 46 of 2014) Part Number Voltage Variable RF Attenuator 24 REV 4, January 2017