Analog Devices Inc. ADG901SCPZ-EP

Overview

ADG901SCPZ-EP from Analog Devices is a military-grade, absorptive SPST RF switch fabricated in CMOS, delivering 38 dB off-isolation at 1 GHz, 0.8 dB insertion loss at 1 GHz, and −3 dB bandwidth to 4.5 GHz under 1.65 V to 2.75 V supply. It operates across −55°C to +125°C and serves as a high-speed signal path selector in RF front-ends of defense-grade transceivers.

For engineers reviewing the ADG901SCPZ-EP datasheet, ADG901SCPZ-EP pinout, ADG901SCPZ-EP application, or ADG901SCPZ-EP equivalent, key selection criteria include its 8-lead LFCSP package, CMOS/LVTTL-compatible CTRL input, 50 Ω matched absorptive architecture, and enhanced product qualification for aerospace environments.

Technical Context

The ADG901SCPZ-EP implements an absorptive (terminated shunt-leg) topology with internal 50 Ω terminations on both RF ports, ensuring stable impedance matching and high isolation without external components. Its on-board CMOS control logic accepts direct CMOS or LVTTL signals, eliminating level-shifting circuitry.

Designed for wideband RF routing up to 4.5 GHz, it achieves sub-10 ns switching times (t_ON = 6.5 ns typ, t_OFF = 10.5 ns typ) and maintains low video feedthrough (2.5 mV_p-p)-critical for pulsed radar and time-sensitive diversity switching.

Key Specifications

Pinout & Package

The ADG901SCPZ-EP uses an 8-lead Lead Frame Chip Scale Package (LFCSP, CP-8-13) with exposed pad requiring connection to GND for thermal and electrical integrity. Pin 1 is marked by a corner chamfer; the exposed pad must be soldered to a GND plane via ≥4 thermal vias.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC646LP2E and ADGM1304, the ADG901SCPZ-EP uniquely balances low-voltage CMOS compatibility, military temperature range, and nanosecond switching-making it optimal for size-, power-, and reliability-constrained defense electronics where GaAs complexity or MEMS latency is prohibitive.

Availability

ADG901SCPZ-EP is available at Aetrix Electronics and suitable for defense avionics, secure SATCOM terminals, and ruggedized IoT gateways requiring stable component supply across extended temperature and long production lifecycles.

Supply support for ADG901SCPZ-EP 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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and aerospace markets since 1965.

The ADG901SCPZ-EP belongs to Analog Devices' Enhanced Product (EP) RF switch family, engineered specifically for mission-critical defense and aerospace applications demanding extended temperature operation, controlled manufacturing, and AQEC compliance.

FAQ

What is the maximum RF input power the ADG901SCPZ-EP can handle before compression?

The ADG901SCPZ-EP has a 1 dB input compression point (P1dB) of 17 dBm at 1 GHz, meaning its insertion loss increases by 1 dB when the RF input reaches this level. This value is measured with dc bias not applied and reflects real-world limits for linear operation in receiver front-ends. Exceeding P1dB risks distortion and degraded SNR in the ADG901SCPZ-EP signal path.

Does the ADG901SCPZ-EP require external termination resistors for proper absorptive operation?

No, the ADG901SCPZ-EP integrates 50 Ω shunt terminations on both RF1 and RF2 ports, making it a fully absorptive switch. External termination resistors are unnecessary-this internal matching ensures high off-isolation and stable return loss without additional components, simplifying layout in space-constrained RF modules containing the ADG901SCPZ-EP.

Can the ADG901SCPZ-EP operate with a 1.8 V supply, and how does that affect RF performance?

Yes, the ADG901SCPZ-EP is fully specified from 1.65 V to 2.75 V, including 1.8 V. At 1.8 V, insertion loss increases slightly (e.g., 0.95 dB at 1 GHz vs. 0.8 dB at 2.5 V), and off-isolation decreases modestly (36 dB vs. 38 dB), but all parameters remain within guaranteed specifications across −55°C to +125°C. This makes the ADG901SCPZ-EP ideal for battery-powered defense radios using 1.8 V logic rails.

What is the role of the exposed pad (EPAD) on the ADG901SCPZ-EP, and how must it be connected?

The EPAD on the ADG901SCPZ-EP serves as the primary thermal and electrical ground path. It must be soldered to a solid GND plane on the PCB using at least four thermal vias. Failure to connect the EPAD degrades thermal resistance (θ_JA rises from 48°C/W), increases junction temperature, and compromises RF return loss-directly impacting reliability and performance of the ADG901SCPZ-EP in high-power or high-temperature deployments.

How does the ADG901SCPZ-EP differ from commercial-grade ADG901 variants?

The ADG901SCPZ-EP differs from commercial ADG901 versions through AQEC-standard qualification: extended temperature range (−55°C to +125°C), single-fab/single-test-site manufacturing, controlled process baseline, and enhanced change notification. These attributes ensure supply chain integrity and long-term reliability-critical for programs where the ADG901SCPZ-EP replaces commercial parts in flight-critical or deployed defense systems.