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Analog Devices Inc. LTC5531ES6#TRMPBF
- Part No.:
- LTC5531ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Detectors
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC5531ES6#TRMPBF.pdf
- Description:
- IC RF DETECT 300MHZ-7GHZ TSOT23
- Quantity:
- Payment:
- Shipping:
Inventory:511
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Product details
Overview
LTC5531ES6#TRMPBF from Analog Devices (formerly Linear Technology) is a precision RF power detector IC designed for real-time RF signal strength measurement in wireless transceivers. It operates across 300MHz–7GHz, supports input power from –32dBm to 10dBm, features buffered VOUT with adjustable 120mV ±35mV offset via VOS pin, and delivers 2MHz bandwidth with 3V/µs slew rate - enabling accurate RSSI generation in 802.11a/g/n, LTE front-end, and mobile phone PA control loops.
For engineers reviewing the LTC5531ES6#TRMPBF datasheet, LTC5531ES6#TRMPBF pinout, LTC5531ES6#TRMPBF application, or LTC5531ES6#TRMPBF equivalent, key selection considerations include its temperature-compensated Schottky diode architecture, shutdown current <2µA, 6-pin TSOT-23 package compatibility, and VOS-adjustable DC output scaling for ADC interfacing in compact RF power monitoring systems.
Technical Context
The LTC5531ES6#TRMPBF integrates an on-chip temperature-compensated Schottky diode peak detector, level-shift amplifier, and unity-gain buffer with fixed ×2 internal gain. Its RF input (RFIN) is referenced to VCC and includes a 500Ω internal termination and 25pF peak-detector capacitor, enabling direct coupling via AC-coupling capacitor without external biasing.
It implements a dedicated shutdown path (SHDN pin) that disconnects internal bias and shorts VOUT to GND via 280Ω resistor, reducing supply current to <2µA. The VOS pin provides precise DC offset control: below 120mV it has no effect; above 120mV, VOUT = VOS + detected RF voltage - supporting flexible ADC input range alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 300MHz to 7GHz - covers all major cellular (GSM, PCS, LTE Bands 1–40), Wi-Fi (2.4/5/6 GHz), and WiMAX bands without external tuning. |
| Input Power Range | –32dBm to 10dBm - enables detection from weak received signals to strong PA output levels in closed-loop transmit power control. |
| VOUT Bandwidth | 2MHz - supports demodulation of AM/ASK signals up to 2MHz data rate and fast RSSI response in AGC loops. |
| Supply Voltage | 2.7V to 6V - compatible with single Li-ion (3.0–4.2V), 3×NiMH (3.6V), or 5V system rails without LDO. |
| Operating Current | 500µA typical - allows continuous operation in battery-powered IoT sensors and portable radios with minimal quiescent load. |
| Shutdown Current | <2µA - enables ultra-low-power sleep mode during RF idle periods, critical for duty-cycled transceivers. |
| VOUT Slew Rate | 3V/µs - ensures fast settling after RF envelope transients, minimizing distortion in pulsed-RF applications like TDMA or TDD systems. |
Pinout & Package
Package: 6-lead TSOT-23 (Thin Small Outline Transistor), 1.0mm height, JEDEC MO-193 compliant, footprint compatible with standard SOT-23 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIN (Pin 1) | RF Input | AC-coupled RF port referenced to VCC; includes 500Ω internal termination and temperature-compensated Schottky diode detector. |
| GND (Pin 2) | Ground Reference | Primary analog ground return for detector core and buffer amplifier; must be low-inductance connection to minimize noise. |
| SHDN (Pin 3) | Shutdown Control | Active-high logic input; internal 160kΩ pulldown ensures default shutdown; asserts VOUT-to-GND short (280Ω) when low. |
| VOS (Pin 4) | Offset Adjustment | Analog voltage input (0–1V) that sets baseline VOUT; only affects output when >120mV, enabling precise ADC input scaling. |
| VOUT (Pin 5) | Detector Output | Buffered DC voltage proportional to RF input power; capable of sourcing 4mA into 2kΩ load with 33pF max capacitive loading. |
| VCC (Pin 6) | Power Supply | 2.7–6V supply input; requires local 0.1µF ceramic bypass capacitor to GND for stable RF detection performance. |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Schottky diode detector | Maintains ±0.5dB accuracy over –40°C to 85°C without external calibration, critical for outdoor base stations and automotive telematics. |
| VOS-adjustable output offset | Enables VOUT to start at user-defined DC level (e.g., 0.5V or 1.0V), eliminating need for external op-amp level-shifting before 12-bit ADC inputs. |
| 2MHz bandwidth with 3V/µs slew rate | Supports real-time envelope tracking of burst-mode RF (e.g., GSM EDGE, LTE TDD), ensuring fidelity up to 2MHz modulation bandwidth. |
| Low 500µA operating current | Reduces thermal drift and PCB self-heating effects, preserving detector linearity in densely packed RF modules. |
| Integrated 280Ω VOUT-to-GND shutdown switch | Provides deterministic zero-VOUT state during sleep, preventing false triggering in downstream comparators or ADC reference circuits. |
Applications
| Mobile Phone Transmit Power Control | Wi-Fi 5/6 RSSI Monitoring |
|---|---|
|
Use Scenario: Real-time feedback loop measuring PA output power in multiband smartphones using capacitive tap (e.g., 0.5pF + 200Ω) before antenna switch. IC Role / Device Role / Timing Role: RF power detector providing DC voltage (VOUT) proportional to Tx power level for DSP-based closed-loop PA bias adjustment. Use Value: Enables ±0.5dB transmit power accuracy across temperature and battery voltage variation, meeting 3GPP ACLR and EVM requirements. |
Use Scenario: Integrated RSSI generation in dual-band 2.4/5GHz Wi-Fi 6 access point RF front-end for dynamic channel selection and interference mitigation. IC Role / Device Role / Timing Role: Wideband RF detector converting received signal envelope into calibrated DC voltage for MCU-based link quality assessment. Use Value: Delivers consistent –32dBm to 10dBm response across 300MHz–7GHz, eliminating need for band-switched detectors in MIMO AP designs. |
| Optical Data Link Signal Strength Monitor | Wireless Infrastructure RF Alarm |
|
Use Scenario: Monitoring photodiode TIA output in fiber-to-the-home (FTTH) ONT receivers where RF-modulated optical signal carries DOCSIS or GPON data. IC Role / Device Role / Timing Role: Envelope detector converting baseband RF output (up to 2MHz) into DC level for optical power health diagnostics. Use Value: 2MHz bandwidth and 3V/µs slew rate preserve pulse integrity of upstream burst transmissions, enabling accurate per-slot power reporting. |
Use Scenario: Standalone RF presence alarm in microwave backhaul radios detecting loss-of-signal (LOS) or excessive reflected power at PA output. IC Role / Device Role / Timing Role: High-dynamic-range detector feeding comparator circuit to trigger fault flag when VOUT falls outside preset thresholds. Use Value: –32dBm sensitivity detects pilot tones even under deep fade; <2µA shutdown current enables always-on monitoring in solar-powered remote sites. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power detector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC5508ESC#TRMPBF | Same 300MHz–7GHz range and –32dBm–12dBm input, but in SC70-6 package; lacks VOS offset adjustment pin. | Requires external DAC or resistor divider for offset trimming; better suited for space-constrained layouts where VOS flexibility is not needed. | Select LTC5508ESC#TRMPBF if board area is critical and offset is fixed or calibrated in software. |
| LTC5532ES6#TRMPBF | Successor with identical pinout and frequency range, adds programmable gain (×1/×2) and extended VOS range (0–2V); higher cost. | Enables wider dynamic range mapping and improved SNR in high-precision PA control; requires updated firmware for gain register access. | Select LTC5532ES6#TRMPBF when future-proofing for adaptive gain or tighter than ±0.3dB linearity is required. |
Compared with LTC5508ESC#TRMPBF, the LTC5531ES6#TRMPBF offers essential VOS adjustability for ADC interface optimization without added complexity; versus LTC5532ES6#TRMPBF, it provides proven performance at lower BOM cost where gain flexibility is unnecessary.
Availability
LTC5531ES6#TRMPBF is available at Aetrix Electronics and suitable for 802.11a/g/n client devices, LTE small-cell base stations, and mobile handset PA control requiring stable component supply across extended temperature and long production lifecycles.
Supply support for LTC5531ES6#TRMPBF 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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear RF components.
The LTC5531ES6#TRMPBF belongs to Linear's precision RF detector family, engineered specifically for wideband, low-power, temperature-stable envelope detection in wireless infrastructure and handheld RF systems.
FAQ
What is the absolute maximum RF input power rating for the LTC5531ES6#TRMPBF?
The LTC5531ES6#TRMPBF has an absolute maximum RFIN power rating of 12dBm (RMS), as specified in the Absolute Maximum Ratings table. Exceeding this may cause permanent damage to the internal Schottky diode or input structure. For reliable operation, keep continuous RF input within the functional range of –32dBm to 10dBm.
Can the LTC5531ES6#TRMPBF detect AM or ASK modulated signals?
Yes, the LTC5531ES6#TRMPBF can demodulate AM and ASK signals with data rates up to 2MHz, thanks to its 2MHz VOUT bandwidth and 3V/µs slew rate. Its peak-detect architecture preserves envelope fidelity, making it suitable for simple receiver front-ends in RFID readers or low-complexity wireless sensor nodes using ASK modulation.
How does the VOS pin affect the LTC5531ES6#TRMPBF output when no RF signal is present?
With no RF input, the LTC5531ES6#TRMPBF outputs a baseline VOUT determined by VOS: below 120mV, VOUT remains ~120mV ±35mV; above 120mV, VOUT = VOS exactly. This allows precise setting of zero-signal output level - e.g., connecting VOS to 0.5V yields VOUT = 0.5V at Pin 5 with no RF applied.
Is the LTC5531ES6#TRMPBF pin-compatible with other detectors in the LTC55xx family?
No - the LTC5531ES6#TRMPBF uses a unique 6-pin TSOT-23 pinout (RFIN, GND, SHDN, VOS, VOUT, VCC). While LTC5508ESC#TRMPBF shares the same frequency range and package footprint, its pin assignment differs (e.g., VOS is absent), requiring PCB layout changes for substitution.
What is the recommended bypass capacitor for VCC on the LTC5531ES6#TRMPBF?
The LTC5531ES6#TRMPBF datasheet specifies a 0.1µF ceramic capacitor placed as close as possible to the VCC pin (Pin 6) and GND (Pin 2). A 100pF capacitor is also recommended in parallel for high-frequency decoupling, especially in 5–7GHz applications where supply noise rejection is critical to detector accuracy.
LTC5531ES6#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Frequency:
- 300MHz ~ 7GHz
- RF Type:
- 802.11a/b/g/WiFi, 802.16/WiMax, WLAN
- Input Range:
- -32dBm ~ 10dBm
- Accuracy:
- -
- Voltage - Supply:
- 2.7V ~ 6V
- Mounting Type:
- 500 µA
- Supplier Device Package:
- Surface Mount
- Current - Supply:
- TSOT-23-6
LTC5531ES6#TRMPBF FAQ
1.How can I place an order for LTC5531ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5531ES6#TRMPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC5531ES6#TRMPBF reliable?
The price and inventory of LTC5531ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5531ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC5531ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5531ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5531ES6#TRMPBF?
LTC5531ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5531ES6#TRMPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC5531ES6#TRMPBF?
For technical support, including LTC5531ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5531ES6#TRMPBF requirements.
6.How does Aetrix verify that LTC5531ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC5531ES6#TRMPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC5531ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC5531ES6#TRMPBF?
All LTC5531ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5531ES6#TRMPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC5531ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LTC5531ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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