Analog Devices Inc. ADG902BCP-500RL7

Overview

ADG902BCP-500RL7 from Analog Devices is a reflective single-pole single-throw (SPST) RF switch optimized for 0 Hz to 4.5 GHz operation, delivering 40 dB off-isolation at 1 GHz, 0.8 dB insertion loss at 1 GHz, and 17 dBm P1dB compression point - enabling high-fidelity signal routing in antenna diversity and tuner modules without DC blocking capacitors.

For engineers reviewing the ADG902BCP-500RL7 datasheet, ADG902BCP-500RL7 pinout, ADG902BCP-500RL7 application, or ADG902BCP-500RL7 equivalent, key selection criteria include its reflective architecture, LFCSP-8 package thermal performance, 1.65 V–2.75 V CMOS/LVTTL control compatibility, and verified RF port handling of up to 0.5 V DC bias.

Technical Context

The ADG902BCP-500RL7 implements a reflective SPST topology with 0 Ω shunt-to-ground termination on the off port, distinguishing it from the absorptive ADG901. Its internal CMOS control logic accepts 1.65 V–2.75 V logic levels and draws <1 µA quiescent current.

It operates across DC to 4.5 GHz (−3 dB frequency), maintains 34–40 dB isolation from 100 MHz to 1 GHz, and achieves 25–28 dB return loss on the on-channel at 1 GHz - all specified over −40°C to +85°C with 8-lead LFCSP packaging and exposed pad grounding.

Key Specifications

Pinout & Package

ADG902BCP-500RL7 uses an 8-lead Lead Frame Chip Scale Package (LFCSP), 3 mm × 3 mm body, 0.75 mm height, with exposed pad requiring connection to PCB ground plane for thermal and electrical performance. Pin 1 identifier located at top-left corner; exposed pad (EPAD) must be soldered to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF SPST switch applications.

Compared with ADG902BCP-500RL7, ADG902BRMZ shares identical RF performance but trades thermal efficiency for legacy package compatibility, while QM11036 extends frequency range at the cost of DC coupling - making ADG902BCP-500RL7 optimal for thermally constrained, DC-biased, sub-4.5 GHz RF routing.

Availability

ADG902BCP-500RL7 is available at Aetrix Electronics and suitable for wireless communications infrastructure, tuner modules, and antenna diversity systems requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.

Supply support for ADG902BCP-500RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, headquartered in Norwood, MA, serving precision instrumentation, communications, and industrial markets since 1965.

The ADG902BCP-500RL7 belongs to Analog Devices' wideband RF switch product line, engineered specifically for high-isolation, low-loss, DC-coupled signal routing in compact, thermally demanding wireless front-ends.

FAQ

What is the maximum DC voltage that can be passed through ADG902BCP-500RL7 without damage?

The ADG902BCP-500RL7 supports DC-coupled operation up to 0.5 V on RF1 or RF2 ports under normal conditions. Exceeding this voltage risks violating absolute maximum ratings - specifically, RFx inputs must remain within −0.5 V to V_DD − 0.5 V. At V_DD = 2.75 V, the safe DC range is −0.5 V to +2.25 V, but functional DC pass-through is limited to 0.5 V per the datasheet's operational specification. Always verify bias network compliance with Table 3's input voltage limits.

Is ADG902BCP-500RL7 pin-compatible with ADG901BCPZ-500RL7?

No, ADG902BCP-500RL7 is not pin-compatible with ADG901BCPZ-500RL7 despite identical LFCSP-8 packaging and pinout numbering. The ADG901 is an absorptive switch with 50 Ω shunt terminations, while the ADG902 is reflective with 0 Ω shunts - resulting in fundamentally different RF port behavior, VSWR characteristics, and system-level matching requirements. Swapping them requires redesign of surrounding impedance-matching networks and may degrade isolation or return loss.

Does ADG902BCP-500RL7 require external DC-blocking capacitors in RF signal paths?

No, ADG902BCP-500RL7 does not require external DC-blocking capacitors when passing DC voltages ≤ 0.5 V superimposed on RF signals. Its internal architecture allows true DC-coupled operation, enabling direct integration into bias tee networks, envelope tracking paths, and DC-biased mixer interfaces - reducing bill-of-materials count and preserving signal integrity at baseband frequencies.

What is the thermal resistance (θ_JA) of ADG902BCP-500RL7 in standard PCB layouts?

The ADG902BCP-500RL7 has a junction-to-ambient thermal resistance (θ_JA) of 48°C/W when mounted on a 4-layer PCB with proper thermal vias connecting the exposed pad to internal ground planes. On a 2-layer board, θ_JA rises to 84°C/W. These values assume full EPAD soldering to GND and conform to JEDEC standards MO-229-WEED-4. Thermal performance degrades significantly if the exposed pad is left unconnected or undersized.

Can ADG902BCP-500RL7 operate with a 1.8 V supply, and how does that affect RF performance?

Yes, ADG902BCP-500RL7 is fully specified for operation from 1.65 V to 2.75 V, including 1.8 V. At 1.8 V, insertion loss increases by ~0.1–0.2 dB across 100 MHz–1 GHz versus 2.5 V operation, and off-isolation decreases by ~2–3 dB at 1 GHz. P1dB drops to ~16 dBm. All timing parameters (t_ON, t_OFF) remain within spec. System-level validation is recommended when operating at minimum V_DD.