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LTC5564HUD#TRPBF

IC RF DETECT 600MHZ-15GHZ 16QFN

Part Number: LTC5564HUD#TRPBF

Manufacturer: Analog Devices Inc.

Category: RF Detectors

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Datasheet:: LTC5564HUD#TRPBF.pdf

Description: IC RF DETECT 600MHZ-15GHZ 16QFN

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

LTC5564HUD#TRPBF UltraFast™ 7ns Response Time, 15GHz RF Power Detector with Comparator

A comprehensive technical overview of the LTC5564HUD#TRPBF, a precision RF power detector from Analog Devices featuring a 600MHz to 15GHz frequency range, –24dBm to 16dBm input power range, 7ns detector response time, 9ns comparator response, 75MHz demodulation bandwidth, programmable gain settings, and a 16-lead 3mm × 3mm QFN package. The H-grade version is specified for operation from –40°C to +125°C. Covers device function, core features, electrical specifications, pin configuration, typical applications, and replacement selection guidance.

Analog Devices 16-Lead QFN (3mm × 3mm) 3.3V / 5V Supply

Device Classification RF Power Detector with Fast Comparator

Part Number: LTC5564HUD#TRPBF

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +125°C (H-Grade)

PRODUCT OVERVIEW

What Is the LTC5564HUD#TRPBF?

LTC5564HUD#TRPBF is a precision RF power detector from Analog Devices designed for applications in the 600MHz to 15GHz frequency range. The device combines a temperature-compensated Schottky diode peak detector, a gain-selectable operational amplifier, and a high-speed comparator in a compact 16-lead 3mm × 3mm QFN package[reference:0].

The LTC5564 operates with input power levels from –24dBm to 16dBm, providing a 40dB dynamic range. The detector delivers an ultra-fast 7ns response time to pulsed RF signals, while the internal comparator provides a 9ns response time to input levels exceeding the external reference voltage (VREF) on the VREF pin, with a latch enable/disable function for capturing short-duration or single-event signals[reference:1][reference:2].

The gain-selectable operational amplifier offers four gain settings controlled by the G0 and G1 logic pins, a 350V/µs slew rate, and 75MHz of demodulation bandwidth to the analog output. The VOUTADJ and VREF pins allow adjustment of the VOUT offset voltage and VCOMP switch point voltage, respectively[reference:3].

The LTC5564HUD#TRPBF is the H-grade version in a 16-lead QFN package with an exposed pad, specified for operation from –40°C to +125°C. The device is RoHS compliant, REACH unaffected, and in active production. The nominal supply current in standard operation is 44mA[reference:4][reference:5].

UltraFast 7ns Response Time Detector response time of 7ns for pulsed RF signals, with a built-in comparator providing 9ns propagation delay for fast threshold detection.

Wide 600MHz to 15GHz Range Operates across a broad frequency spectrum with –24dBm to 16dBm input power range and 40dB dynamic range.

Programmable Gain & 75MHz Bandwidth Four gain settings (1.5dB to 18dB) via G0/G1 pins, with 350V/µs slew rate and 75MHz demodulation bandwidth for envelope tracking.

DEVICE HIGHLIGHTS

Key Features and Benefits of LTC5564HUD#TRPBF

UltraFast 7ns Detector Response

7ns typical response time for RF detector output, enabling precise timing measurements and rapid fault detection in microwave and radar systems.

9ns Comparator with Latch

High-speed comparator provides 9ns response to input levels exceeding VREF, with a latch enable (LEN) function to capture short-duration or single-event signals.

Programmable Gain (1.5dB to 18dB)

Four gain settings controlled by G0 and G1 pins allow sensitivity optimization for low-level signal measurement, with VOUTADJ for output offset adjustment.

75MHz Demodulation Bandwidth

The gain-selectable operational amplifier provides 350V/µs slew rate and 75MHz demodulation bandwidth, supporting envelope tracking and wideband signal detection.

Temperature Compensated

Temperature-compensated Schottky diode peak detector ensures repeatable and stable RF power measurements across the –40°C to +125°C operating range.

Compact 3mm × 3mm QFN

16-lead QFN package with exposed pad (Pin 17) provides excellent thermal performance and minimal board space for space-constrained RF designs.

REFERENCE DATA

Technical Specifications for LTC5564HUD#TRPBF

Part Number	LTC5564HUD#TRPBF	Manufacturer	Analog Devices
Device Type	RF Power Detector with Comparator	Family	UltraFast™
Frequency Range	600MHz to 15GHz	Input Power Range	–24dBm to 16dBm
Dynamic Range	40 dB	Detector Response Time	7 ns (Typical)
Comparator Response Time	9 ns (Typical)	Demodulation Bandwidth	75 MHz
Amplifier Slew Rate	350 V/µs	Gain Settings	4 (1.5dB to 18dB via G0/G1 Pins)
Supply Voltage	3V to 5.5V (Single Supply)	Supply Current (Nominal)	44 mA
Output Voltage Swing	~295mV to V_CC – 1.6V	Output Load Drive	1.7 mA
RF Input Termination	250 Ω Internal	Internal Reservoir Capacitor	8 pF
Comparator Latch	LEN Pin (High = Latch, Low = Transparent)	V_REF Input	External Reference Voltage
Package / Case	16-Lead QFN (3mm × 3mm × 0.75mm) with Exposed Pad	Supplier Device Package	16-QFN (UD)
Pin Count	16 (Plus Exposed Pad Pin 17)	Mounting Type	Surface Mount
Operating Temperature (H-Grade)	-40°C to +125°C	RoHS	ROHS3 Compliant
REACH Status	REACH Unaffected	MSL Level	MSL 1 (Unlimited)
ECCN	EAR99	Product Status	Active
Packaging	Tape & Reel (2,500 per Reel)	Grade	H-Grade
Demonstration Board	DC2158A / DC1646A	Input Impedance Data	S1P Files Available (Design Note 1030)

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for LTC5564HUD#TRPBF

RF Input Matching & Gain Configuration

The LTC5564HUD#TRPBF requires careful RF input matching and gain configuration:

RF Input (RFIN, Pin 1): A DC blocking capacitor must be used to connect the RF signal source to Pin 1. The pin has an internal 250Ω termination and an internal 8pF reservoir capacitor[reference:6].
Impedance Matching: The detector's performance (response and bandwidth) depends on proper impedance matching. S1P data (0.5GHz to 16.5GHz) is available in Design Note 1030 for first-cut matching designs[reference:7].
Gain Selection (G0, G1): The G0 and G1 pins select one of four gain settings: Gain1 (1.5dB, both GND), Gain2 (6dB higher, G0=GND/G1=VCCA), Gain4 (12dB higher, G0=VCCA/G1=GND), and Gain8 (18dB higher, both VCCA)[reference:8].
Output Offset (VOUTADJ, Pin 6): Leave floating for nominal quiescent output offset, or apply a voltage to adjust the VOUT DC offset. Setting VOUT to 500mV provides maximum demodulation bandwidth in each gain mode[reference:9].
Comparator Reference (VREF, Pin 14): Apply an external reference voltage to set the comparator switching point. VCOMP responds in 9ns when the detected signal exceeds VREF[reference:10].

PCB and System-Level Guidance

High-speed RF detector performance depends on layout and decoupling:

Power Supply Decoupling: Use bypass capacitors on all supply pins (V_CCRF, V_CCA, V_CCP), the V_OUTADJ pin, and the V_REF pin for stable operation[reference:11].
Ground Return: The return path for all supply currents is through the exposed pad (Pin 17). Ensure a low-impedance ground connection directly beneath the package[reference:12].
RF Trace Routing: Keep RF traces short and matched. Use controlled impedance lines and minimize discontinuities between the connector and the RFIN pin for best high-frequency performance.
NC Pins: Pins 2, 9, and 16 are no-connect and should be left unconnected for best RF performance[reference:13].
Verify the recommended PCB footprint from the official datasheet prior to production.

16-LEAD QFN (3mm × 3mm)

Pin Configuration Reference for LTC5564HUD#TRPBF

LTC5564

QFN TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The QFN package has 16 pins plus an exposed pad (Pin 17) with a 3mm × 3mm body size. The exposed pad is the ground return for all supply currents and must be soldered to the PCB ground plane.

1 RFIN RF Input - Requires DC Blocking Capacitor; Internal 250Ω Termination and 8pF Reservoir Capacitor

2 NC No Connect - Leave Unconnected for Best RF Performance

3 GND Ground - Connect to PCB Ground Plane

4 GND Ground - Connect to PCB Ground Plane

5 LEN Comparator Latch Enable - High = Latch V_COMP, Low = Transparent

6 V_OUTADJ Amplifier Output Offset Adjust - Float for Nominal Offset or Apply Voltage for Adjustment

7 G0 Amplifier Gain Selection Bit 0 - Logic Low/High Sets Gain Mode

8 G1 Amplifier Gain Selection Bit 1 - Logic Low/High Sets Gain Mode

9 NC No Connect - Leave Unconnected for Best RF Performance

10 V_OUT Detector Amplifier Output - Analog Output Voltage

11 V_CCP High Current Power Supply Pin

12 V_CCA Analog Power Supply Pin

13 V_COMP Comparator Output - Digital Logic Output

14 V_REF Comparator Negative Input - Apply External Reference Voltage

15 V_CCRF RF Power Supply Pin

16 NC No Connect - Leave Unconnected for Best RF Performance

17 EPAD Exposed Pad - Ground Return for All Supply Currents; Must Be Soldered to PCB Ground Plane

APPLICATION AREAS

Typical Applications for LTC5564HUD#TRPBF

RF Signal Presence Detectors

Fast 7ns response enables RF signal presence detection for 802.11a/b/g, 802.15, optical data links, and wireless data modems.

PA Envelope Tracking Control

75MHz demodulation bandwidth and fast slew rate support envelope tracking for RF power amplifiers, improving efficiency.

Fast Alarm & Fault Detection

9ns comparator with latch captures short-duration or single-event faults, providing rapid protection for microwave systems.

Radar Detectors

600MHz to 15GHz range and fast response make this detector suitable for radar detection and pulse measurement applications.

Microwave Links (MMDS)

Precision RF power measurement across a wide dynamic range supports MMDS microwave link monitoring and control.

Test Instrumentation

Ultra-fast 7ns response and wide frequency range suit RF test instrumentation and timing measurement applications.

REPLACEMENT GUIDANCE

Selecting an Alternative for LTC5564HUD#TRPBF

A replacement for the LTC5564HUD#TRPBF should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Analog Devices product pages and datasheets.

Type: RF Power Detector with Comparator

Frequency range: 600MHz–15GHz

Input power: –24dBm to 16dBm

Response time: 7ns (detector), 9ns (comparator)

Package: 16-Lead QFN (3mm × 3mm)

Temperature range: –40°C to 125°C (H-Grade)

Gain settings: 4 (1.5dB–18dB)

Demodulation bandwidth: 75MHz

Pin-to-pin and functionally compatible alternatives (same family, different grade or packaging):

Part Number	Package	Temperature Grade	Packaging
LTC5564HUD#TRPBF	16-QFN	H-Grade (-40°C to 125°C)	Tape & Reel
LTC5564HUD#PBF	16-QFN	H-Grade (-40°C to 125°C)	Tube
LTC5564IUD#TRPBF	16-QFN	I-Grade (-40°C to 85°C)	Tape & Reel

All alternative part numbers listed above are documented in the official Analog Devices product pages and datasheets. The LTC5564HUD#TRPBF is the H-grade (–40°C to +125°C) version in a 16-lead QFN package with tape-and-reel packaging (2,500 units per reel). For tube packaging in the same grade, consider LTC5564HUD#PBF. For I-grade (–40°C to +85°C) operation, consider LTC5564IUD#TRPBF. For wider frequency range (up to 40GHz) or RMS detection, consider LTC5596 or ADL5902. Select based on temperature grade, frequency range, detection type, and packaging requirements.

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MANUFACTURER INFORMATION

Analog Devices

The LTC5564 (LTC5564HUD#TRPBF) belongs to the UltraFast™ family of RF power detectors from Analog Devices (originally Linear Technology). The device integrates a temperature-compensated Schottky diode peak detector, a gain-selectable operational amplifier, and a high-speed comparator in a compact 3mm × 3mm QFN package. The LTC5564 operates from 600MHz to 15GHz with a –24dBm to 16dBm input power range, delivering a 7ns detector response time and a 9ns comparator response time. The device is available in H-grade (–40°C to +125°C) and I-grade (–40°C to +85°C) versions, and is widely used in RF signal detection, PA envelope tracking, fast alarm systems, radar detectors, and microwave links.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: LTC5564HUD#TRPBF

Manufacturer: Analog Devices Inc.

Package

Series: -

Packaging: Tape & Reel (TR)

Product Status: -

Frequency: 600MHz ~ 15GHz

RF Type: General Purpose

Input Range: -24dBm ~ 16dBm

Accuracy: -

Voltage - Supply: 5V

Mounting Type: Surface Mount

Supplier Device Package: 16-QFN (3x3)

Current - Supply: -

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Part Number: LTC5564HUD#TRPBF

Manufacturer: Analog Devices Inc.

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