F2258EVKITREV02

F2258 IDT | Alldatasheet

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Technical content

Voltage Variable RF Attenuator 50 to 6000 MHz F2258, Rev 1 01/20/2017 1 © 2015 Integrated Device Technology, Inc. GENERAL DESCRIPTION The F2258 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 50 MHz to 6000 MHz. In addition to providing low insertion loss, the F2258 provides excellent linearity performance over its entire voltage control and attenuation range. The F2258 uses a single positive supply voltage of 3.15 V to 5.25 V. Another feature includes multi- directional operation meaning the RF input can be applied to either RF1 or RF2 pins. Control voltage ranges from 0 V to 3.6 V. COMPETITIVE ADVANTAGE F2258 provides extremely low insertion loss and superb IP3, IP2, Return Loss and Slope Linearity across the control range. Comparing to the previous state-of-the-art for silicon VVAs this device is better as follows:  Insertion Loss: @ 2000 MHz: 1.4 dB vs. 2.8 dB @ 6000 MHz: 2.7 dB vs. 7.0 dB  Maximum Attenuation Slope: 33 dB/Volt vs. 53 dB/Volt  Minimum Return Loss up to 6000 MHz: 12.5 dB vs. 7 dB  Minimum Output IP3: 31 dBm vs. 15 dBm  Minimum Input IP2: 87 dBm vs. 80 dBm  Maximum Operating Temperature: +105 °C vs. +85 °C

APPLICATIONS

 Base Station 2G, 3G, 4G,  Portable Wireless  Repeaters and E911 systems  Digital Pre-Distortion  Point to Point Infrastructure  Public Safety Infrastructure  Satellite Receivers and Modems  WIMAX Receivers and Transmitters  Military Systems, JTRS radios  RFID handheld and portable readers  Cable Infrastructure  Wireless LAN  Test / ATE Equipment

FEATURES

 Low Insertion Loss: 1.4 dB @ 2000 MHz  Typical / Min IIP3: 65 dBm / 47 dBm  Typical / Min IIP2: 95 dBm / 87 dBm  33.6 dB Attenuation Range  Bi-directional RF ports  +34.4 dBm Input P1dB compression  Linear-in-dB attenuation characteristic  Supply voltage: 3.15 V to 5.25 V  VCTRL range: 0 V to 3.6 V using 5 V supply  +105 °C max operating temperature  3 mm x 3 mm, 16-pin QFN package FUNCTIONAL BLOCK DIAGRAM Control RF1RF2 VCTRLVDD

ORDERING INFORMATION

0.9 mm height package Green Tape & Reel Omit IDT prefix RF Product Line

Voltage Variable RF Attenuator 2 Rev 1 01/20/2017 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min Max Units VDD to GND VDD -0.3 +5.5 V VCTRL to GND (with 0 V ≤ VDD ≤ 5.25 V) VCTRL -0.3 Minimum (VDD, +4.0) V RF1, RF2 to GND VRF -0.3 0.3 V RF1 or RF2 Input Power applied for 24 hours maximum (VDD applied @ 2000 MHz and Tcase=+85°C) PMAX24 30 dBm Junction Temperature Tj 150 °C Storage Temperature Range Tst -65 150 °C Lead Temperature (soldering, 10s) 260 °C ElectroStatic Discharge – HBM (JEDEC/ESDA JS-001-2012) VESDHBM (Class 1C) ElectroStatic Discharge – CDM (JEDEC 22-C101F) VESDCDM (Class C3) 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) 80.6 °C/W θJC (Junction – Case) [The Case is defined as the exposed paddle] 5.1 °C/W Moisture Sensitivity Rating (Per J-STD-020) MSL1

Voltage Variable RF Attenuator 4 Rev 1 01/20/2017 F2258 SPECIFICATION Refer to EVKit / Applications Circuit, VDD = +3.3 V, TCASE = +25 °C, signal applied to RF1 input, FRF = 2000 MHz, minimum attenuation, PIN = 0 dBm for small signal parameters, +20 dBm for single tone linearity tests, +20 dBm per tone for two tone tests, two tone delta frequency = 50 MHz, 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 Conditions Min Typ Max Units Supply Current IDD 0.5 1 1.17 2 mA ICTRL Current ICTRL -1.0 14 μA Insertion Loss, IL AMIN Minimum Attenuation 1.4 1.9 dB Maximum Attenuation AMAX 34 2 35 dB Insertion Phase Δ ΦΔMAX At 36 dB attenuation relative to Insertion Loss 27 Deg ΦΔMID At 18 dB attenuation relative to Insertion Loss 10 Input 1dB Compression 3 P1dB 34.4 dBm Minimum RF1 Return Loss over control voltage range S11

50 MHz4 16

2000 MHz 17

6000 MHz 15

over control voltage range S22

2000 MHz 16

6000 MHz 13

Input IP3 IIP3 65 dBm IIP3MIN All attenuation settings 44 47 Output IP3 OIP3MIN Maximum attenuation 35 dBm Input IP2 IIP2 PIN + IM2dBc, IM2 term is F1+F2 95 dBm IIP2MIN All attenuation settings 87 Input IH2 HD2 PIN + H2dBc 90 dBm Input IH3 HD3 PIN + (H3dBc/2) 54 dBm Settling Time TSETTL0.1dB Any 1 dB step in the 0 dB to 33 dB control range 50% VCTRL to RF settled to within ± 0.1 dB 15 µs Note 1: Items in min/max columns in bold italics are Guaranteed by Test. Note 2: Items in min/max columns that are not bold/italics are Guaranteed by Design Characterization. Note 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. Note 4: Set blocking capacitors C1 & C2 to 0.01uF to achieve best return loss performance at 50 MHz.

Rev 1 01/20/2017 5 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS (TOC) Unless otherwise noted for the TOC graphs on the following pages, the following conditions apply.  VDD = +3.3 V or +5.0 V  TCASE = +25 ºC  FRF = 2000 MHz  RF trace and connector losses are de-embedded for S-parameters  Pin = 0 dBm for all small signal tests  Pin = +20 dBm for single tone linearity tests (RF1 port driven)  Pin = +20 dBm/tone for two tone linearity tests (RF1 port driven)  Two tone frequency spacing = 50 MHz

Voltage Variable RF Attenuator 6 Rev 1 01/20/2017 TYPICAL OPERATING CONDITIONS [S2P BROADBAND PERFORMANCE] (- 1 -) Attenuation vs. VCTRL Min. & Max. Attenuation vs. Frequency Attenuation vs. Frequency Attenuation Delta to 25C vs. Frequency -40 -35 -30 -25 -20 -15 -10 Attenuation (dB) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -50 -40 -30 -20 -10 0 1 2 3 4 5 6 7 8 9 Attenuation (dB) Frequency (GHz) Vctrl = 0.0V Vctrl = 0.8V Vctrl = 1.0V Vctrl = 1.2V Vctrl = 1.4V Vctrl = 1.6V Vctrl = 1.8V Vctrl = 2.4V -3.00 -2.50 -2.00 -1.50 -1.00 -0.50 0.00 0.50 1.00 1.50 2.00 2.50 3.00 Attenuation Delta to 25C (dB) VCTRL (V) -40C / 0.9GHz -40C / 2.0GHz -40C / 3.0GHz 105C / 0.9GHz 105C / 2.0GHz 105C / 3.0GHz

Rev 1 01/20/2017 7 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS [S2P VS. VCTRL] (- 2 -) Attenuation vs. VCTRL RF1 Return Loss vs. VCTRL Insertion Phase  vs. VCTRL Attenuation Slope vs. VCTRL RF2 Return Loss vs. VCTRL Insertion Phase Slope vs. VCTRL -40 -35 -30 -25 -20 -15 -10 Attenuation (dB) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -40 -35 -30 -25 -20 -15 -10 RF1 Return Loss (dB) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -10 Insertion Phase  (deg) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz Attenuation Slope (dB/V) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -40 -35 -30 -25 -20 -15 -10 RF2 Return Loss (dB) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -20 100 Insertion Phase Slope (deg/V) VCTRL (V) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz (positive phase = electrically shorter)

Voltage Variable RF Attenuator 8 Rev 1 01/20/2017 TYPICAL OPERATING CONDITIONS [S2P VS. VCTRL & TEMPERATURE] (- 3 -) Attenuation Response vs. VCTRL RF1 Return Loss vs. VCTRL Insertion Phase  vs. VCTRL Attenuation Slope vs. VCTRL RF2 Return Loss vs. VCTRL Insertion Phase Slope vs. VCTRL -40 -35 -30 -25 -20 -15 -10 Attenuation (dB) VCTRL (V) -40C / 0.9GHz 25C / 0.9GHz 105C / 0.9GHz -40C / 2.0GHz 25C / 2.0GHz 105C / 2.0GHz -40C / 3.0GHz 25C / 3.0GHz 105C / 3.0GHz -40 -35 -30 -25 -20 -15 -10 RF1 Return Loss (dB) VCTRL (V) -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 Attenuation Slope (dB/V) VCTRL (V) -40C / 0.9GHz 25C / 0.9GHz 105C / 0.9GHz -40C / 2.0GHz 25C / 2.0GHz 105C / 2.0GHz -40C / 3.0GHz 25C / 3.0GHz 105C / 3.0GHz -40 -35 -30 -25 -20 -15 -10 RF2 Return Loss (dB) VCTRL (V) -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 (positive phase = electrically shorter)

Rev 1 01/20/2017 9 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS [S2P VS. ATTENUATION & TEMPERATURE] (- 4 -) RF1 Return Loss vs. Attenuation RF2 Return Loss vs. Attenuation Insertion Phase Δ vs. Attenuation RF1 Return Loss vs. Attenuation RF2 Return Loss vs. Attenuation Insertion Phase Δ vs. Attenuation -40 -35 -30 -25 -20 -15 -10 0 4 8 12 16 20 24 28 32 36 RF1 Return Loss (dB) Attenuation (dB) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -40 -35 -30 -25 -20 -15 -10 0 4 8 12 16 20 24 28 32 36 RF2 Return Loss (dB) Attenuation (dB) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -10 0 4 8 12 16 20 24 28 32 36 Insertion Phase  (deg) Attenuation (dB) 0.4GHz 0.7GHz 1.5GHz 2.7GHz 4.0GHz 5.0GHz 6.0GHz -40 -35 -30 -25 -20 -15 -10 0 4 8 12 16 20 24 28 32 36 RF1 Return Loss (dB) Attenuation (dB) -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 -40 -35 -30 -25 -20 -15 -10 0 4 8 12 16 20 24 28 32 36 RF2 Return Loss (dB) Attenuation (dB) -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 4 8 12 16 20 24 28 32 36 Insertion Phase  (deg) Attenuation (dB) -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 (positive phase = electrically shorter) (positive phase = electrically shorter)

Voltage Variable RF Attenuator 10 Rev 1 01/20/2017 TYPICAL OPERATING CONDITIONS [S2P VS. FREQUENCY] (- 5 -) Min & Max. Attenuation vs. Frequency Worst-Case RF1 Return Loss vs. Frequency Max. Insertion Phase  vs. Frequency Min. & Max. Attenuation Slope vs. Frequency Worst-Case RF2 Return Loss vs. Frequency Gain Compression vs. Frequency -25 -20 -15 -10 0 1 2 3 4 5 6 Worst-Case RF1 Return Loss (dB) Frequency (GHz) -40C 25C 105C -10 0 1 2 3 4 5 6 Max. Insertion Phase  (deg) Frequency (GHz) -40C 25C 105C 0 1 2 3 4 5 6 Min./Max. Atenuation Slope (dB/V) Frequency (GHz) Max. Slope Min. Slope -25 -20 -15 -10 0 1 2 3 4 5 6 Worst-Case RF2 Return Loss (dB) Frequency (GHz) -40C 25C 105C (positive phase = electrically shorter) VCTRL varied from 0.8V to 1.8V

Rev 1 01/20/2017 11 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS [S2P @ LOW FREQUENCY, GROUP DELAY] (- 6 -) Min & Max. Attenuation vs. Low Frequency Low-Frequency RF1 Return Loss vs. VCTRL Worst-Case Return Loss vs. Low Frequency Low-Frequency Attenuation vs. VCTRL Low-Frequency RF2 Return Loss vs. VCTRL Group Delay vs. VCTRL -40 -35 -30 -25 -20 -15 -10 RF1 Return Loss (dB) VCTRL (V) -40C / 43MHz 25C / 43MHz 105C / 43MHz -40C / 128MHz 25C / 128MHz 105C / 128MHz -40C / 255MHz 25C / 255MHz 105C / 255MHz -20 -15 -10 0 100 200 300 400 500 Worst-Case Return Loss (dB) Frequency (MHz) -40C /RF1 25C / RF1 105C / RF1 -40C / RF2 25C / RF2 105C / RF2 -40 -35 -30 -25 -20 -15 -10 Attenuation (dB) VCTRL (V) -40C / 43MHz 25C / 43MHz 105C / 43MHz -40C / 128MHz 25C / 128MHz 105C / 128MHz -40C / 255MHz 25C / 255MHz 105C / 255MHz -40 -35 -30 -25 -20 -15 -10 RF2 Return Loss (dB) VCTRL (V) -40C / 43MHz 25C / 43MHz 105C / 43MHz -40C / 128MHz 25C / 128MHz 105C / 128MHz -40C / 255MHz 25C / 255MHz 105C / 255MHz 100 0 1 2 3 4 5 6 Group Delay (ps) Frequency (GHz) -40C / Insertion Loss 25C / Insertion Loss 105C / Insertion Loss -40C / Max. Attenuation 25C / Max. Attenuation 105C / Max. Attenuation (C1, C2 set to 0.1uF) (C1, C2 set to 0.1uF) (C1, C2 set to 0.1uF) (C1, C2 set to 0.1uF) (C1, C2 set to 0.1uF)

Voltage Variable RF Attenuator 12 Rev 1 01/20/2017 TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. VCTRL] (- 7 -) Input IP3 vs. VCTRL Input IP2 vs. VCTRL 2nd Harm Input Intercept Point vs. VCTRL Output IP3 vs. VCTRL Output IP2 vs. VCTRL 3rd Harm Input Intercept Point vs. VCTRL Input IP3 (dBm) VCTRL (V) -40C 25C 105C 100 110 120 Input IP2 (dBm) VCTRL (V) -40C 25C 105C 100 110 120 130 IH2 (dBm) VCTRL (V) -40C 25C 105C Output IP3 (dBm) VCTRL (V) -40C 25C 105C 100 110 120 Output IP2 (dBm) VCTRL (V) -40C 25C 105C IH3 (dBm) VCTRL (V) -40C 25C 105C

Rev 1 01/20/2017 13 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. VCTRL, RF1/RF2 DRIVEN] (- 8 -) Input IP3 vs. VCTRL Input IP2 vs. VCTRL 2nd Harm Input Intercept Point vs. VCTRL Output IP3 vs. VCTRL Output IP2 vs. VCTRL 3rd Harm Input Intercept Point vs. VCTRL Input IP3 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 Input IP2 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 130 IH2 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven Output IP3 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 Output IP2 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven IH3 (dBm) VCTRL (V) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven

Voltage Variable RF Attenuator 14 Rev 1 01/20/2017 TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. ATTENUATION] (- 9 -) Input IP3 vs. Attenuation Input IP2 vs. Attenuation 2nd Harm Input Intercept Point vs. Attenuation Output IP3 vs. Attenuation Output IP2 vs. Attenuation 3rd Harm Input Intercept Point vs. Attenuation 0 4 8 12 16 20 24 28 32 36 Input IP3 (dBm) Attenuation (dB) -40C 25C 105C 100 110 120 0 4 8 12 16 20 24 28 32 36 Input IP2 (dBm) Attenuation (dB) -40C 25C 105C 100 110 120 130 0 4 8 12 16 20 24 28 32 36 IH2 (dBm) Attenuation (dB) -40C 25C 105C 0 4 8 12 16 20 24 28 32 36 Output IP3 (dBm) Attenuation (dB) -40C 25C 105C 100 110 120 0 4 8 12 16 20 24 28 32 36 Output IP2 (dBm) Attenuation (dB) -40C 25C 105C 0 4 8 12 16 20 24 28 32 36 IH3 (dBm) Attenuation (dB) -40C 25C 105C

Rev 1 01/20/2017 15 Voltage Variable RF Attenuator TYPICAL OPERATING CONDITIONS 2GHZ, VDD=3.3V [IP3, IP2, IH2, IH3 VS. VCTRL, RF1/RF2 DRIVEN] (- 10 -) Input IP3 vs. Attenuation Input IP2 vs. Attenuation 2nd Harm Input Intercept Point vs. Attenuation Output IP3 vs. Attenuation Output IP2 vs. Attenuation 3rd Harm Input Intercept Point vs. Attenuation 0 4 8 12 16 20 24 28 32 36 Input IP3 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 0 4 8 12 16 20 24 28 32 36 Input IP2 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 130 0 4 8 12 16 20 24 28 32 36 IH2 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 0 4 8 12 16 20 24 28 32 36 Output IP3 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 100 110 120 0 4 8 12 16 20 24 28 32 36 Output IP2 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF2 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven 0 4 8 12 16 20 24 28 32 36 IH3 (dBm) Attenuation (dB) -40C / RF1 Driven 25C / RF1 Driven 105C / RF1 Driven -40C / RF2 Driven 25C / RF2 Driven 105C / RF2 Driven

Voltage Variable RF Attenuator 16 Rev 1 01/20/2017 PACKAGE DRAWING (3mm x 3mm 16-pin QFN), NLG16

Rev 1 01/20/2017 17 Voltage Variable RF Attenuator LAND PATTERN DIMENSION

Voltage Variable RF Attenuator 18 Rev 1 01/20/2017 PIN DIAGRAM PIN DESCRIPTION Pin Name Function 4, 9 GND Ground these pins as close to the device as possible.

3 RF2

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. 5 VDD Power supply input. Bypass to GND with capacitors close as possible to pin. 14, 15, 16 NC No internal connection. These pins can be left unconnected or connected to ground. 7 VCTRL Attenuator control voltage. Apply a voltage in the range as specified in the Operating Conditions Table. See application section for details about VCTRL.

10 RF1

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. — EP 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.

Rev 1 01/20/2017 19 Voltage Variable RF Attenuator APPLICATIONS INFORMATION Default Start-up The VCTRL pin has an internal pull-down resistor. If left floating, the part will power up in the minimum attenuation state. VCTRL The VCTRl pin is used to control the attenuation of the F2258. With VDD = 5 V the control range of VCTRl is from 0 V (minimum attenuation) to 3.6 V (maximum attenuation). For other settings of VDD refer to the Operating Conditions Table. Apply VDD before applying voltage to the VCTRl pin to prevent damage to the on-chip pull-up ESD diode. If this sequencing is not possible, then set resistor R2 to 1kΩ to limit the current into the VCTRl pin. RF1 and RF2 Ports The F2258 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 enhanced linearity. 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. 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 pin 7 is recommended as shown below. Control 5 6 7 8 13141516 2pf 5Kohm VCTRL RF2 RF1 VDD

Voltage Variable RF Attenuator 20 Rev 1 01/20/2017 EVKIT PICTURE Top View Bottom View

Rev 1 01/20/2017 21 Voltage Variable RF Attenuator EVKIT / APPLICATIONS CIRCUIT

Voltage Variable RF Attenuator 22 Rev 1 01/20/2017 EVKIT BOM (REV 02) Item # Part Reference QTY DESCRIPTION Mfr. Part # Mfr.

1 C3, C6 2 10nF ±5%, 50V, X7R Ceramic Capacitor (0603) GRM188R71H103J Murata

2 C4, C5 2 1000pF ±5%, 50V, C0G Ceramic Capacitor

(0402) GRM1555C1H102J Murata

3 C1, C2 2 100pF ±5%, 50V, C0G Ceramic Capacitor (0402) GRM1555C1H101J Murata

4 R1, R2 2 0Ω Resistors (0402) ERJ-2GE0R00X Panasonic

5 J1, J2, J3, J4 4 Edge Launch SMA (0.375 inch pitch ground tabs) 142-0701-851 Emerson Johnson

6 U1 1 Voltage Variable Attenuator F2258NLGK IDT

7 1 Printed Circuit Board F2258 EVKIT REV 02 IDT TOP MARKINGS 04Y 446L F2258 Part Number Date Code [YWW] (Week 46 of 2014) Lot Code Assembler Code

Rev 1 01/20/2017 23 Voltage Variable RF Attenuator REVISION HISTORY SHEET Rev Date Page Description of Change O 2015-Aug-03 Initial Release 1 2017-Jan-20 4 Increased the Max limits for IDD and ICTRL

Voltage Variable RF Attenuator 24 Rev 1 01/20/2017 Corporate Headquarters

6024 Silver Creek Valley Road

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