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Analog Devices Inc. HMC495LP3TR
- Part No.:
- HMC495LP3TR
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Modulators
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
HMC495LP3TR.pdf
- Description:
- RF MODULATOR 250MHZ-3.8GHZ 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,749
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Product details
Overview
HMC495LP3TR from Analog Devices (formerly Hittite Microwave) is a SiGe wideband direct quadrature modulator RFIC designed for RF signal upconversion in digital communication systems. It operates from 250 MHz to 3800 MHz, delivers −5 dBm typical RF output power, achieves 38 dBc uncalibrated carrier suppression, and features a −158 dBm/Hz noise floor. It serves as the core modulation stage in cellular basestations and broadband wireless transceivers.
For engineers reviewing the HMC495LP3TR datasheet, HMC495LP3TR pinout, HMC495LP3TR application, or HMC495LP3TR equivalent, this page provides verified RF performance data, calibrated vs. uncalibrated suppression behavior, LO drive requirements (−6 to +6 dBm), baseband bandwidth (DC–250 MHz), and supply-sensitive biasing guidance for carrier/sideband optimization.
Technical Context
The HMC495LP3TR implements a direct-conversion I/Q modulator architecture with differential LO (LOP/LON), differential I/Q baseband inputs (Ip/In, Qp/Qn), and single-ended 50 Ω RF output (RFP). Its SiGe process enables wide instantaneous bandwidth and low noise across sub-1 GHz to 3.8 GHz bands.
It supports both differential and single-ended LO drive using an external 68 Ω shunt resistor; baseband DC bias (Vbbdc = 1.0–1.2 V) is adjustable per channel to optimize carrier suppression over temperature and frequency; VB1/VB2 pins enable independent bias control of output and LO stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 250 MHz to 3800 MHz - supports multi-band cellular (UMTS, GSM, CDMA), WLL, and ISM applications without band switching. |
| Carrier Suppression (uncalibrated) | 38 dBc typical - limits unwanted carrier feedthrough without calibration circuitry; degrades to 34 dBc over temperature. |
| Output Noise Floor | −158 dBm/Hz typical - enables high dynamic range in wideband receivers and low-EVM transmission. |
| LO Input Power Range | −6 dBm to +6 dBm - accommodates low-power LO synthesizers and eliminates need for external amplification. |
| Baseband Bandwidth | DC to 250 MHz - supports GMSK, QPSK, QAM, and SSB modulation with 10 pF external shunt capacitors. |
| Supply Voltage & Current | +3.3 V @ 108 mA - single low-current supply simplifies power delivery; operates stably from +3.0 V to +3.6 V. |
| Output IP3 | 17 dBm typical - determines linearity headroom for multi-carrier W-CDMA signals (e.g., ACPR −59 dBc at 2140 MHz). |
Pinout & Package
Housed in a 3 mm × 3 mm, 16-pin QFN package (LP3) with exposed ground paddle; RoHS-compliant variant is HMC495LP3E. All ground pins (1, 4, 9, 12) and the paddle must be soldered to a low-inductance RF ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | GND | RF/DC ground reference; requires low-impedance PCB connection to minimize noise coupling and ensure return loss >13 dB. |
| 2, 3 | LOP, LON | Differential LO input; supports single-ended drive with 68 Ω shunt resistor to improve LO port return loss to 7 dB. |
| 5 | VB2 | LO stage bias voltage (2.7–3.0 V); tuning adjusts sideband suppression and output noise floor. |
| 6, 7 | Qn, Qp | Differential quadrature baseband input; 1.0–1.15 V DC bias optimizes carrier suppression; 800 mVpp differential AC input standard. |
| 8 | VB1 | Output stage bias; connect directly to Vcc (3.3 V); sets output stage quiescent current and P1dB. |
| 10 | N/C | No internal connection; leave unconnected and unstubbed on PCB. |
| 11 | RFP | Single-ended 50 Ω RF output; requires series AC-coupling capacitor to block Vcc from antenna path. |
| 13 | Vcc1 | Supply for mixer/output stages (3.3 V, 37 mA); decoupling critical for output IP3 stability. |
| 14, 15 | Ip, In | Differential in-phase baseband input; identical biasing and AC drive specs as Qp/Qn; I/Q amplitude/phase balance affects sideband suppression. |
| 16 | Vcc2 | Supply for LO stage (3.3 V, 64 mA); separate rail enables independent LO stage optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Wide RF bandwidth | 250–3800 MHz continuous coverage - eliminates need for multiple narrowband modulators in multi-standard radios. |
| Low-noise direct conversion | −158 dBm/Hz noise floor - preserves SNR in high-order QAM systems and enables <−70 dBc ACPR in W-CDMA. |
| Flexible LO interface | Supports differential or single-ended LO drive with external 68 Ω shunt - simplifies integration with existing LO sources. |
| Adjustable I/Q bias | Independent DC bias on Ip/In and Qp/Qn (1.0–1.15 V) - enables manual carrier suppression calibration per band and temperature. |
| Integrated bias control | Separate VB1 (output stage) and VB2 (LO stage) pins - allows fine-tuning of P1dB, noise floor, and sideband suppression independently. |
Applications
| UMTS Basestation Transmitter | ISM Band 2.4 GHz Transceiver |
|---|---|
Use Scenario: UMTS FDD uplink transmission at 1920–1980 MHz with 5 MHz channel bandwidth and 3.84 MHz chip rate. IC Role / Device Role / Timing Role: Direct quadrature modulator converting baseband I/Q symbols to RF carrier; replaces double-conversion architectures. Use Value: Achieves −59.7 dBc ACPR at 1960 MHz with −17.3 dBm channel power, meeting 3GPP TS 25.104 spectral mask without external filtering. |
Use Scenario: 2.4 GHz ISM transceiver supporting IEEE 802.15.4 O-QPSK or proprietary narrowband protocols. IC Role / Device Role / Timing Role: Wideband RF modulator enabling rapid frequency agility across 2.400–2.4835 GHz band. Use Value: Delivers 38 dBc carrier suppression and −158 dBm/Hz noise floor, ensuring robust link budget and coexistence in dense RF environments. |
| GSM/EDGE Basestation | Fixed Wireless Access (FWA) CPE |
Use Scenario: GSM900/1800 basestation transmitting GMSK-modulated signals with 200 kHz channel spacing. IC Role / Device Role / Timing Role: Single-chip modulator handling full 890–960 MHz and 1710–1880 MHz bands without tuning. Use Value: Provides −72.3 dBc ACPR at 880 MHz and −71.5 dBc at 1960 MHz, satisfying ETSI EN 300 910 spectral emission limits. |
Use Scenario: Point-to-multipoint FWA unit operating in 3.4–3.8 GHz licensed band for last-mile broadband. IC Role / Device Role / Timing Role: High-linearity modulator supporting 256-QAM OFDM waveforms with 100 MHz instantaneous bandwidth. Use Value: Delivers 17 dBm output IP3 and 2 dBm P1dB, enabling >30 dB ACLR margin for high-throughput fixed wireless links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband direct quadrature modulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADL5375-05 | Wider baseband bandwidth (DC–2 GHz), higher supply current (190 mA), requires external LO buffer; 3.8 GHz max RF frequency same. | Better suited for LTE-A carrier aggregation with >100 MHz composite bandwidth; less optimal for cost-sensitive ISM designs. | Select ADL5375-05 when baseband signal bandwidth exceeds 250 MHz or when integrated LO buffer is not required. |
| TRF372017 | Lower RF range (300–4000 MHz), integrated LO synthesizer, higher LO power requirement (+10 dBm), 3.3 V only supply. | Reduces BOM count in self-contained transmitters but increases layout complexity due to PLL noise coupling risk. | Choose TRF372017 for compact, integrated transmitter modules where LO synthesis is acceptable trade-off for footprint reduction. |
Compared with ADL5375-05 and TRF372017, the HMC495LP3TR offers superior uncalibrated carrier suppression (38 dBc) and lower noise floor (−158 dBm/Hz) at lower supply current, making it optimal for high-fidelity, externally-synthesized wideband transmitters where LO purity and EVM are critical.
Availability
HMC495LP3TR is available at Aetrix Electronics and suitable for UMTS basestations, ISM transceivers, and fixed wireless access equipment requiring stable component supply across industrial temperature ranges (−40 °C to +85 °C).
Supply support for HMC495LP3TR 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 Hittite Microwave in 2014 and maintains its high-performance RF portfolio, emphasizing precision analog, RF, and microwave ICs for communications, defense, and instrumentation.
The HMC495LP3TR belongs to Hittite's legacy wideband modulator product line, engineered specifically for direct-conversion transmitters in cellular infrastructure and broadband wireless systems demanding wide instantaneous bandwidth and low distortion.
FAQ
What is the recommended LO drive configuration for HMC495LP3TR?
The HMC495LP3TR supports both differential and single-ended LO drive. For single-ended operation, drive LOP while terminating LON with a 50 Ω resistor to ground and adding a 68 Ω shunt resistor on the LO port to achieve ≥7 dB LO return loss. Differential drive yields best sideband suppression but requires matched 50 Ω paths. The HMC495LP3TR datasheet specifies −6 to +6 dBm LO power across both modes.
How does baseband DC bias affect HMC495LP3TR performance?
Adjusting the DC bias voltage (1.0–1.15 V) on Ip/In and Qp/Qn pins directly optimizes carrier suppression for a given LO frequency and power level; typical offset voltage needed is <5 mV. The HMC495LP3TR's VB1 and VB2 pins further allow independent tuning of output stage and LO stage bias to balance P1dB, noise floor, and sideband suppression-critical for temperature-stable operation.
Can HMC495LP3TR operate outside its specified 250–3800 MHz RF range?
No. The HMC495LP3TR is characterized and guaranteed from 250 MHz to 3800 MHz. Performance degrades rapidly below 250 MHz (baseband coupling limitations) and above 3800 MHz (matching network roll-off). The device exhibits 16 dB RF port return loss at band edges but falls below specification outside this range; use within the validated band ensures compliant ACPR, carrier suppression, and noise floor.
What is the role of the 10 pF capacitors on the baseband inputs of HMC495LP3TR?
The 10 pF shunt capacitors (C4, C5, C9, C10 per application schematic) set the high-frequency cutoff of the baseband path, enabling DC–250 MHz bandwidth. Reducing their value extends bandwidth toward 1 GHz but risks increased LO leakage and degraded broadband noise floor. The HMC495LP3TR's baseband input capacitance is 0.5 pF, so external 10 pF caps dominate the AC response and must be placed close to the pins.
Is HMC495LP3TR pin-compatible with HMC495LP3E?
Yes. HMC495LP3TR and HMC495LP3E share identical pinout, footprint, and electrical specifications. The "E" suffix denotes RoHS-compliant packaging (100% matte Sn lead finish, MSL1, 260 °C reflow), while HMC495LP3TR uses Sn/Pb finish (235 °C reflow). Both require the same PCB land pattern and thermal design; no layout changes are needed when substituting between them.
HMC495LP3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Modulator
- LO Frequency:
- 250MHz ~ 3.8GHz
- RF Frequency:
- 250MHz ~ 3.8GHz
- P1dB:
- 2dBm
- Noise Floor:
- -158dBm/Hz
- Output Power:
- -6dBm
- Current - Supply:
- 108 mA
- Voltage - Supply:
- 3V ~ 3.6V
- Test Frequency:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
HMC495LP3TR FAQ
1.How can I place an order for HMC495LP3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for HMC495LP3TR 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 HMC495LP3TR reliable?
The price and inventory of HMC495LP3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HMC495LP3TR is usually 5 days.
3.What payment methods are accepted for HMC495LP3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HMC495LP3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HMC495LP3TR?
HMC495LP3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HMC495LP3TR 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 HMC495LP3TR?
For technical support, including HMC495LP3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HMC495LP3TR requirements.
6.How does Aetrix verify that HMC495LP3TR is sourced from the original manufacturer or authorized distributors?
All HMC495LP3TR 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 HMC495LP3TR meets industry standards.
7.What is the process for return or replacement of HMC495LP3TR?
All HMC495LP3TR units undergo pre-shipment inspection (PSI). If there is an issue with HMC495LP3TR, 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 HMC495LP3TR part is unused and in its original packaging.
Return procedure for HMC495LP3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HMC495LP3TR Tags
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