Analog Devices Inc. ADL5505ACBZ-P7

Overview

ADL5505ACBZ-P7 from Analog Devices is a true rms RF power detector IC for high-frequency signal chains, operating from 450 MHz to 6000 MHz. It delivers ±0.25 dB rms detection accuracy over temperature, supports 2.5 V–3.3 V single-supply operation, draws only 1.8 mA, and features 500 Ω nominal input impedance. It is deployed in LTE/WiMAX transmitter power monitoring and W-CDMA base station feedback loops.

For engineers reviewing the ADL5505ACBZ-P7 datasheet, ADL5505ACBZ-P7 pinout, ADL5505ACBZ-P7 application, or ADL5505ACBZ-P7 equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic range performance across 7 frequency bands, and real-world substitution guidance for RF power measurement designs.

Technical Context

The ADL5505ACBZ-P7 implements two-stage rms detection: first stripping the RF carrier to extract the envelope, then performing mathematically accurate square-domain averaging using a proprietary translinear core. Its on-chip 100 Ω output series resistance enables external RC filtering to suppress residual ripple.

It uses internal ac-coupling at RFIN with frequency-dependent input impedance (510||1.01 pF at 450 MHz, 80||0.42 pF at 6000 MHz) and delivers rail-to-rail VRMS output with conversion gain ranging from 1.88 V/V rms (450 MHz) to 0.77 V/V rms (6000 MHz), calibrated against best-fit linear reference at 25°C.

Key Specifications

Pinout & Package

ADL5505ACBZ-P7 is housed in a 4-ball, 0.8 mm × 0.8 mm wafer-level chip-scale package (WLCSP) with bottom-side solder balls. The package is RoHS-compliant and optimized for RF layout with minimal parasitic inductance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar true rms power detection applications.

Compared with AD8361ARMZ and LTC5564IUD#PBF, ADL5505ACBZ-P7 uniquely balances 6 GHz bandwidth, ±0.25 dB rms accuracy over temperature, and 1.8 mA power - making it the preferred choice for calibrated LTE/WiMAX transmitter monitoring where precision and efficiency coexist.

Availability

ADL5505ACBZ-P7 is available at Aetrix Electronics and suitable for LTE base station design, 5G FR1 test instrumentation, and WiMAX CPE development requiring stable component supply and full traceability.

Supply support for ADL5505ACBZ-P7 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 communications, industrial, and aerospace markets with precision signal processing solutions.

The ADL5505ACBZ-P7 belongs to Analog Devices' TruPwr™ detector family, engineered specifically for accurate, temperature-stable rms power measurement in wideband wireless transceivers and infrastructure equipment.

FAQ

What is the RF input impedance of ADL5505ACBZ-P7 at 1900 MHz?

The ADL5505ACBZ-P7 exhibits an input impedance of 270 Ω || 0.67 pF at 1900 MHz, as specified in Table 1 of the Rev. A datasheet. This frequency-dependent impedance requires careful matching-typically via a 75 Ω shunt resistor-to achieve optimal 50 Ω system interface and minimize VSWR across the LTE Band 2/25 operating band. The ADL5505ACBZ-P7 datasheet confirms this value under standard test conditions (TA = 25°C, VS = 3.0 V).

Does ADL5505ACBZ-P7 support 6000 MHz operation with ±1 dB accuracy?

Yes, ADL5505ACBZ-P7 maintains ±1 dB rms detection accuracy from −22 dBm to −17 dBm input power at 6000 MHz, as documented in Table 1 (Rev. A, Page 5). While its ±0.25 dB range narrows to 11 dBm maximum input at this frequency, the device remains fully functional for 5G FR1 upper-band monitoring and millimeter-wave front-end characterization when paired with appropriate input attenuation and matching networks. The ADL5505ACBZ-P7 specification explicitly validates this performance.

How does the internal 100 Ω series resistance at VRMS affect output filtering?

The ADL5505ACBZ-P7 integrates a precise 100 Ω series resistance at the VRMS pin to form a controlled low-pass filter with an external shunt capacitor (e.g., 10 nF → 160 kHz cutoff). This eliminates reliance on op-amp buffers while preserving fast 3 µs pulse response and minimizing board space. The ADL5505ACBZ-P7 datasheet details this architecture in Figure 32 and Section "Selecting the Output Low-Pass Filter", confirming its role in reducing residual ripple to <1 mV_pp without degrading settling time.

Can ADL5505ACBZ-P7 measure W-CDMA signals with 5.8 dB crest factor accurately?

Yes, ADL5505ACBZ-P7 is characterized for W-CDMA reverse link waveforms with up to 5.8 dB crest factor (Figure 22, Rev. A), delivering ≤±0.5 dB error across −20 dBm to +5 dBm input range at 900 MHz. Its translinear rms core inherently rejects crest factor effects, enabling accurate power reporting in HSPA+ base stations and femtocells. The ADL5505ACBZ-P7 datasheet validates this behavior using standardized 3GPP test models.

What is the minimum input level for ±1 dB accuracy at 2600 MHz?

At 2600 MHz, the ADL5505ACBZ-P7 achieves ±1 dB rms detection accuracy down to −22 dBm input power, as specified in Table 1 (Rev. A, Page 4). This enables reliable low-power monitoring in LTE Band 7 small cells and active antenna systems where received signal strength may fall near noise floor. The ADL5505ACBZ-P7 datasheet confirms this limit under continuous-wave conditions across the full industrial temperature range.