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Texas Instruments TRF3701IRHC
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- Part No.:
- TRF3701IRHC
- Manufacturer:
- Texas Instruments
- Category:
- RF Modulators
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
TRF3701IRHC.pdf
- Description:
- RF MODULATOR 140MHZ-1.5GHZ 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,566
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Product details
Overview
TRF3701IRHC from Texas Instruments is a 0.4–1.5 GHz silicon germanium quadrature modulator with 7 dBm P1dB, –156 dBm/Hz noise floor at –10 dBm output, >35 dBc unadjusted carrier suppression, and >40 dBc unadjusted sideband suppression at 1 GHz. It converts complex baseband or IF signals directly to RF for cellular BTS transmit channels.
For engineers reviewing the TRF3701IRHC datasheet, TRF3701IRHC pinout, TRF3701IRHC application, or TRF3701IRHC equivalent, key selection criteria include LO input power range (–6 to +6 dBm), VCM = 3.7 V common-mode voltage requirement, differential or single-ended I/Q drive capability, 5 V supply operation, and RHC QFN package thermal pad soldering requirements.
Technical Context
The TRF3701IRHC implements a double-balanced mixer architecture with an internal LO phase splitter enabling single-ended 400–1500 MHz LO input without external balun. Its analog combiner sums real and imaginary RF outputs for direct feeding of RF preamps up to 1.5 GHz.
Baseband inputs (IVIN, QVIN, IREF, QREF) accept either differential or single-ended signals with fixed 3.7 V common-mode voltage; carrier and sideband suppression are optimized via DC offset tuning of these four pins. Power-down control (PWD) enables 120 ns turn-on and 20 ns turn-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 0.4–1.5 GHz RF output; supports GSM, CDMA, UMTS, LTE-FDD uplink bands |
| P1dB Output | 6.5 dBm typical; defines maximum linear output before 1 dB compression |
| Noise Floor | –156 dBm/Hz at 6 MHz offset, POUT = –10 dBm; critical for EVM-sensitive wideband modulation |
| Carrier Suppression | 35 dBc typical unadjusted at 1 GHz; improves to >55 dBc after VCM tuning |
| Sideband Suppression | 37 dBc typical unadjusted at 1 GHz; improves to >55 dBc after amplitude/phase tuning |
| LO Input Power | –6 to +6 dBm into 50 Ω; internal termination eliminates external matching |
| Supply Voltage | 4.5–5.5 V; total current 145 mA active, 13 mA in power-down mode |
Pinout & Package
TRF3701IRHC uses a 4-mm × 4-mm, 16-pin RHC QFN package with exposed thermal die pad requiring PCB soldering for thermal and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1,2,3,5,9,11,12) | Ground reference | Multiple ground pins ensure low-impedance return paths for analog, RF, and digital sections |
| VCC (6,10) | Analog supply | 5 V ±0.5 V supply for core modulator; requires local 1 pF || 0.1 µF decoupling |
| LO (4) | Local oscillator input | Single-ended 400–1500 MHz input; internally terminated to 50 Ω; no external balun needed |
| RFOUT (8) | RF output | AC-coupled single-ended RF output; 26 + j3 Ω impedance at 942.5 MHz; drives 50 Ω load directly |
| IVIN (14), QVIN (13) | I/Q signal inputs | Differential or single-ended baseband inputs; require 3.7 V common-mode bias (VCM) |
| IREF (15), QREF (16) | I/Q reference inputs | DC bias pins for VCM setting when using single-ended I/Q drive; must be decoupled with 0.1 µF |
| PWD (7) | Power-down control | Active-high logic input; 120 ns turn-on, 20 ns turn-off; reduces current from 145 mA to 13 mA |
Key Features
| Feature | Design Value |
|---|---|
| Direct quadrature upconversion | Eliminates IF stage and image-reject filtering; enables zero-IF transmitter architectures |
| Internal LO phase splitter | Removes need for external 90° hybrid or balun; simplifies LO path design and reduces BOM cost |
| Dual I/Q input configuration | Supports both differential and single-ended baseband drive; accommodates DAC5686, THS4503, or ASIC interfaces |
| Optimized suppression tuning | VCM and DC offset adjustment on IVIN/IREF/QVIN/QREF enables >55 dBc carrier/sideband suppression |
| Thermal die pad | Exposed pad under package bottom must be soldered to PCB ground plane for thermal dissipation and RF stability |
Applications
| Cellular Base Transceiver Station (BTS) | Wireless LAN IEEE 802.11a/g/n |
|---|---|
Use Scenario: High-linearity upconversion in macro/microcell BTS transmit chains operating in 800/900/1800/1900/2100 MHz bands. IC Role / Device Role / Timing Role: Quadrature modulator converting baseband I/Q signals to RF; replaces discrete mixer + LO splitter + combiner. Use Value: >35 dBc unadjusted carrier suppression reduces adjacent-channel leakage ratio (ACLR); 7 dBm P1dB supports high-output PA driver stages. | Use Scenario: Direct-conversion transmitter in 5 GHz UNII bands for enterprise APs and client adapters. IC Role / Device Role / Timing Role: RF modulator accepting baseband I/Q from WLAN SoC or DAC; operates up to 1.5 GHz with flat gain response. Use Value: –156 dBm/Hz noise floor ensures <–35 dB EVM at 54 Mbps OFDM; 400–1500 MHz range covers all 802.11a/g/n bands. |
| CDMA2000 / UMTS Infrastructure | LMDS / MMDS Fixed Wireless Access |
Use Scenario: Wideband upconversion in multi-carrier CDMA2000 and W-CDMA base station radios. IC Role / Device Role / Timing Role: Modulator handling complex I/Q waveforms with high dynamic range; supports 3.84 MHz W-CDMA channel bandwidth. Use Value: >40 dBc unadjusted sideband suppression minimizes spectral regrowth; IMD3 = –55 dBc enables multi-tone linearity. | Use Scenario: Point-to-multipoint broadband access equipment operating in 24–38 GHz LMDS or 2.5 GHz MMDS bands. IC Role / Device Role / Timing Role: First-stage modulator in IF-upconvert architecture; feeds external upconverter or directly drives 2.5 GHz PA. Use Value: 0.4–1.5 GHz RF range supports MMDS band; 3.7 V VCM interface matches legacy DACs; thermal pad ensures reliability at ambient >70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadrature modulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADL5375-05 | Wider 300–4000 MHz RF range; higher 10.5 dBm P1dB; requires external LO buffer; 5 mm × 5 mm LFCSP | Better suited for multi-band infrastructure supporting 2.6 GHz LTE and 3.5 GHz 5G NR | Select ADL5375-05 when extending beyond 1.5 GHz or requiring higher output power; verify LO drive level compatibility. |
| MAX2022 | Narrower 700–1000 MHz RF range; lower 4.5 dBm P1dB; integrated LO synthesizer; 7 mm × 7 mm TQFN | Targeted for compact portable infrastructure like small cells and repeaters with integrated frequency generation | Select MAX2022 when system-level integration (LO + modulator) reduces board area; not suitable for 1.5 GHz or above. |
Compared with ADL5375-05 and MAX2022, TRF3701IRHC delivers optimal balance of noise floor (–156 dBm/Hz), suppression performance (>35 dBc), and proven reliability in deployed BTS systems-without requiring external LO synthesis or exceeding 1.5 GHz operational ceiling.
Availability
TRF3701IRHC is available at Aetrix Electronics and suitable for cellular infrastructure, wireless LAN access points, and fixed wireless equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for TRF3701IRHC 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The TRF3701IRHC belongs to TI's RF front-end portfolio designed specifically for high-performance wireless infrastructure transmitters-emphasizing ultralow noise, high linearity, and simplified direct-conversion architecture.
FAQ
What is the recommended common-mode voltage (VCM) for TRF3701IRHC I/Q inputs?
The TRF3701IRHC requires a precise 3.7 V common-mode voltage on all four baseband inputs (IVIN, QVIN, IREF, QREF). This value is specified in the Recommended Operating Conditions table and is critical for achieving >35 dBc unadjusted carrier suppression. Deviations from 3.7 V degrade suppression performance; VCM must be externally generated and decoupled with 0.1 µF capacitors per pin.
Does TRF3701IRHC require an external balun for the LO input?
No, TRF3701IRHC does not require an external balun. Its internal LO phase splitter accepts a single-ended 400–1500 MHz LO signal and generates the required in-phase and quadrature LO signals internally. The LO pin is internally terminated to 50 Ω, allowing direct connection to a 50 Ω LO source delivering –6 to +6 dBm.
How is power-down functionality implemented on TRF3701IRHC?
TRF3701IRHC uses an active-high PWD pin (Pin 7) to enter low-power state. When PWD = 0 V, supply current drops from 145 mA to 13 mA. Turn-on time is 120 ns and turn-off time is 20 ns, enabling rapid power cycling in TDD systems. The PWD pin has 11 kΩ input impedance and must be driven by a logic-compatible voltage source.
What package type and thermal requirements apply to TRF3701IRHC?
TRF3701IRHC uses a 4-mm × 4-mm, 16-pin RHC QFN package with exposed thermal die pad. The pad (1.65 mm × 1.65 mm minimum) must be soldered to a solid PCB ground plane using at least four 0.3-mm-diameter thermal vias on 1.2-mm pitch. Failure to solder the pad degrades RF performance and thermal reliability.
Can TRF3701IRHC accept single-ended I/Q inputs?
Yes, TRF3701IRHC supports single-ended I/Q drive. In this configuration, IVIN and QVIN receive AC-coupled signal inputs while IREF and QREF are biased to the 3.7 V VCM with DC blocking capacitors. Performance matches differential drive when VCM is accurately maintained; the datasheet confirms equivalent harmonic and noise performance in both modes.
TRF3701IRHC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-VQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Modulator
- LO Frequency:
- 140MHz ~ 1.5GHz
- RF Frequency:
- 140MHz ~ 1.5GHz
- P1dB:
- 6.5dBm
- Noise Floor:
- -156dBm/Hz
- Output Power:
- -1dBm
- Current - Supply:
- 145 mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Test Frequency:
- 942.5MHz
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-VQFN (4x4)
TRF3701IRHC FAQ
1.How can I place an order for TRF3701IRHC through Aetrix?
Please submit a Request for Quotation (RFQ) for TRF3701IRHC 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 TRF3701IRHC reliable?
The price and inventory of TRF3701IRHC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TRF3701IRHC is usually 5 days.
3.What payment methods are accepted for TRF3701IRHC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TRF3701IRHC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TRF3701IRHC?
TRF3701IRHC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TRF3701IRHC 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 TRF3701IRHC?
For technical support, including TRF3701IRHC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TRF3701IRHC requirements.
6.How does Aetrix verify that TRF3701IRHC is sourced from the original manufacturer or authorized distributors?
All TRF3701IRHC 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 TRF3701IRHC meets industry standards.
7.What is the process for return or replacement of TRF3701IRHC?
All TRF3701IRHC units undergo pre-shipment inspection (PSI). If there is an issue with TRF3701IRHC, 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 TRF3701IRHC part is unused and in its original packaging.
Return procedure for TRF3701IRHC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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