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Analog Devices Inc. LTC5564HUD#PBF
- Part No.:
- LTC5564HUD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Detectors
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LTC5564HUD#PBF.pdf
- Description:
- IC RF DETECT 600MHZ-15GHZ 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC5564HUD#PBF from Analog Devices is an ultrafast 7ns-response, temperature-compensated Schottky RF peak detector IC with integrated gain-selectable amplifier and high-speed comparator, operating from 600MHz to 15GHz across –24dBm to 16dBm input power range, used in RF signal presence detection and envelope demodulation for wireless infrastructure and radar systems.
For engineers reviewing the LTC5564HUD#PBF datasheet, LTC5564HUD#PBF pinout, LTC5564HUD#PBF application, or LTC5564HUD#PBF equivalent, key selection criteria include its 9ns comparator response time, 75MHz demodulation bandwidth at GAIN1, programmable gain (1×/2×/4×/8×), adjustable VOUT offset via VOUTADJ, and H-grade operation up to 125°C.
Technical Context
The LTC5564HUD#PBF integrates a temperature-compensated Schottky diode peak detector, a four-gain-mode operational amplifier (GAIN1–GAIN8), and a latch-enabled comparator in a single monolithic die. Its RF path features internal 250Ω termination and 8pF reservoir capacitance, while the analog output supports 350V/µs slew rate at GAIN1 with 500mV output swing.
Comparator operation relies on external reference voltage applied to VREF, with propagation delay as low as 9ns for rising-edge detection of RFIN ≥10dBm; latch enable (LEN) provides synchronous capture of VCOMP state. Gain selection (G0/G1) directly trades off bandwidth (75MHz → 15MHz), slew rate (350V/µs → 50V/µs), and response time (7ns → 14ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 600MHz to 15GHz - enables use in 5.8GHz ISM, mmWave links, and radar bands without external frequency translation. |
| Input Power Range | –24dBm to 16dBm - supports detection from weak receive signals to strong transmit leakage monitoring. |
| VOUT Response Time | 7ns (GAIN1, 10–16dBm) - ensures sub-10ns real-time RF event triggering for fast alarm and envelope tracking. |
| Comparator Response Time | 9ns - delivers deterministic digital flag generation for time-critical RF presence detection. |
| Demodulation Bandwidth | 75MHz at GAIN1, VOUT = 500mV - sufficient for ASK/AM demodulation up to ~30MHz modulation rates. |
| Operating Temperature | –40°C to 125°C (H-grade) - qualified for under-hood automotive, base station PA control, and industrial radar environments. |
| Supply Voltage Range | 3.1V to 5.5V - compatible with standard 3.3V and 5V system rails without level-shifting. |
Pinout & Package
Package: 16-lead 3mm × 3mm plastic QFN (UD package) with exposed thermal pad (Pin 17) soldered to PCB ground for optimal thermal performance and VOUT offset stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFIN (1) | RF Input | Internal 250Ω termination + Schottky peak detector + 8pF reservoir capacitor; requires AC coupling capacitor. |
| LEN (5) | Comparator Latch Enable | High = latches VCOMP state; low = transparent mode; enables synchronized sampling of RF events. |
| VOUTADJ (6) | Amplifier Offset Adjustment | DC bias control pin; sets VOUT quiescent offset (e.g., 500mV for max bandwidth) via resistor divider or DAC. |
| G0, G1 (7, 8) | Gain Selection Inputs | Digital control lines selecting one of four amplifier gains (1×/2×/4×/8×), directly affecting bandwidth and slew rate. |
| VOUT (10) | Analog Output | Demodulated RF envelope output; drives ≤10pF load directly; series resistor required for larger capacitive loads. |
| VCOMP (13) | Comparator Output | CMOS-compatible digital output indicating RFIN > VREF; 9ns propagation delay enables high-speed threshold detection. |
| VREF (14) | Comparator Reference Input | External reference voltage setting detection threshold; accepts DC or slow-varying analog signals. |
| VCCRF/VCCA/VCCP (11,12,15) | Separate Supply Rails | Isolated power domains reduce noise coupling: VCCRF for RF core, VCCA for analog, VCCP for comparator/output driver. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast 7ns VOUT response | Enables real-time RF envelope tracking in fast-hopping or pulsed radar systems without signal distortion. |
| Four programmable gain modes | Allows dynamic sensitivity adjustment: GAIN1 (max BW) for wideband demodulation; GAIN8 (max sensitivity) for low-power detection. |
| Adjustable VOUT offset via VOUTADJ | Supports interface to ADCs or comparators requiring specific DC bias points (e.g., 500mV for rail-to-rail input ranges). |
| Latch-enable comparator with 9ns delay | Provides glitch-free, synchronized digital flag generation for FPGA or microcontroller interrupt-driven RF event capture. |
| Temperature-compensated Schottky detector | Maintains ±0.5dB output accuracy over –40°C to 125°C, eliminating need for external calibration in harsh environments. |
Applications
| 5.8GHz ISM Band Radios | PA Power Supply Envelope Tracking Control |
|---|---|
Use Scenario: Detecting active transmission in unlicensed 5.8GHz Wi-Fi or point-to-point radios to trigger sleep/wake cycles or channel occupancy sensing. IC Role / Device Role / Timing Role: RF signal presence detector generating TTL-level VCOMP pulse within 9ns of RFIN exceeding VREF threshold. Use Value: Enables rapid duty-cycle optimization and coexistence management without adding latency to MAC-layer decisions. |
Use Scenario: Monitoring RF output envelope of a power amplifier to dynamically adjust its supply voltage for efficiency improvement. IC Role / Device Role / Timing Role: High-bandwidth envelope detector feeding analog feedback loop to DC-DC converter controller. Use Value: Achieves >15% PA efficiency gain by tracking fast AM envelopes up to 75MHz modulation bandwidth. |
| Radar Detector | Fast Alarm System |
Use Scenario: Identifying incoming pulsed RF energy in automotive or security radar receivers for collision warning or intrusion detection. IC Role / Device Role / Timing Role: Ultra-low-latency peak detector converting GHz-range pulses into clean digital alerts via VCOMP output. Use Value: Delivers <10ns detection-to-alert latency critical for real-time safety-critical response timing. |
Use Scenario: Triggering immediate hardware interrupts upon sudden RF energy surge (e.g., EMI event, jammer detection, or fault condition). IC Role / Device Role / Timing Role: Fast comparator with latch enable providing glitch-immune, edge-triggered alarm signal to safety MCU. Use Value: Eliminates software polling delays; guarantees sub-10ns alarm assertion for fail-safe system shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RF power detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC5536 | Slower 25ns response time; –26dBm to +12dBm input range; no VOUTADJ; same 16-pin QFN package. | Lower sensitivity and speed limit use in fast-pulsed radar or envelope tracking; suitable for cost-sensitive 3G/4G infrastructure monitoring. | Select LTC5536 when 25ns latency is acceptable and extended low-end sensitivity (–26dBm) is prioritized over speed. |
| LTC5532 | 300MHz–7GHz range; precision VOUT offset and gain control; SC70-6 package; no comparator output. | Cannot replace VCOMP functionality; lacks latch enable and fast comparator; limited to lower-frequency wireless and test equipment. | Choose LTC5532 only when pure analog RSSI output is needed and 15GHz operation or digital alert generation is unnecessary. |
Compared with LTC5536 and LTC5532, the LTC5564HUD#PBF uniquely combines 15GHz bandwidth, 7ns analog response, 9ns comparator latency, and H-grade 125°C operation-making it the only option for millimeter-wave radar envelope detection and ultrafast RF alarm systems.
Availability
LTC5564HUD#PBF is available at Aetrix Electronics and suitable for 5.8GHz ISM radios, PA envelope tracking control, radar detectors, fast alarm systems, and mmWave communication links requiring stable component supply and guaranteed 125°C operation.
Supply support for LTC5564HUD#PBF 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, serving communications, industrial, automotive, and aerospace markets with precision signal processing solutions.
The LTC5564HUD#PBF belongs to Analog Devices' high-speed RF detector product line, designed specifically for ultrafast envelope detection, real-time RF event monitoring, and millimeter-wave system integration where latency, bandwidth, and temperature robustness are critical.
FAQ
What is the maximum RF input frequency supported by the LTC5564HUD#PBF?
The LTC5564HUD#PBF is specified and guaranteed for operation from 600MHz to 15GHz. At 15GHz, performance metrics such as detector sensitivity and linearity are maintained per datasheet curves (e.g., Figure G28), though higher frequencies may be achievable with reduced dynamic range. The LTC5564HUD#PBF is validated for full 15GHz operation in H-grade temperature range.
How does the gain selection (G0/G1) affect the performance of the LTC5564HUD#PBF?
G0 and G1 pins configure the internal amplifier's gain mode: GAIN1 (1×), GAIN2 (2×), GAIN4 (4×), or GAIN8 (8×). Each step increases sensitivity but reduces demodulation bandwidth (75MHz → 15MHz) and slew rate (350V/µs → 50V/µs), while increasing VOUT response time (7ns → 14ns). The LTC5564HUD#PBF datasheet Table 1 defines exact VOUTADJ voltages required per gain mode to maintain target offset.
Can the LTC5564HUD#PBF operate from a 3.3V supply?
Yes, the LTC5564HUD#PBF supports supply voltages from 3.1V to 5.5V across its full –40°C to 125°C operating range. At 3.3V, key specs remain functional: VOUT slew rate is 325/70 V/µs (rise/fall), comparator response is 9ns, and demodulation bandwidth at GAIN1 is still 75MHz. The LTC5564HUD#PBF maintains full specification compliance at 3.3V, enabling direct integration into low-voltage RF subsystems.
What is the function of the exposed pad (Pin 17) on the LTC5564HUD#PBF?
Pin 17 is the exposed thermal pad, internally connected to GND. It must be soldered to a PCB ground plane to ensure proper thermal dissipation, minimize VOUT offset drift, and maintain RF performance stability. Failure to connect this pad results in elevated junction temperature, degraded accuracy, and potential VOUT offset error due to ground path resistance. The LTC5564HUD#PBF thermal data (θJC = 7.5°C/W) assumes full pad soldering.
Does the LTC5564HUD#PBF require external passive components for basic operation?
Yes - minimal external components are required: AC coupling capacitor on RFIN, bypass capacitors on VCCRF/VCCA/VCCP/VREF/VOUTADJ (per datasheet Figure 5), and optional resistors for VOUT load matching (>10pF) or VOUTADJ biasing. No external op-amp, comparator, or temperature compensation circuitry is needed, as all functions are integrated. The LTC5564HUD#PBF achieves full functionality with fewer than 10 passives in typical 15GHz-optimized layouts.
LTC5564HUD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- UltraFast™
- Packaging:
- Tube
- Product Status:
- Active
- Frequency:
- 600MHz ~ 15GHz
- RF Type:
- General Purpose
- Input Range:
- -24dBm ~ 16dBm
- Accuracy:
- -
- Voltage - Supply:
- 5V
- Mounting Type:
- -
- Supplier Device Package:
- Surface Mount
- Current - Supply:
- 16-QFN (3x3)
LTC5564HUD#PBF FAQ
1.How can I place an order for LTC5564HUD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC5564HUD#PBF 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 LTC5564HUD#PBF reliable?
The price and inventory of LTC5564HUD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC5564HUD#PBF is usually 5 days.
3.What payment methods are accepted for LTC5564HUD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC5564HUD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC5564HUD#PBF?
LTC5564HUD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC5564HUD#PBF 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 LTC5564HUD#PBF?
For technical support, including LTC5564HUD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC5564HUD#PBF requirements.
6.How does Aetrix verify that LTC5564HUD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC5564HUD#PBF 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 LTC5564HUD#PBF meets industry standards.
7.What is the process for return or replacement of LTC5564HUD#PBF?
All LTC5564HUD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC5564HUD#PBF, 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 LTC5564HUD#PBF part is unused and in its original packaging.
Return procedure for LTC5564HUD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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