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Analog Devices Inc. AD8346ARU-REEL
- Part No.:
- AD8346ARU-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- RF Modulators
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD8346ARU-REEL.pdf
- Description:
- IC QUADRATURE MOD .8GHZ 16-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
AD8346ARU-REEL from Analog Devices is a silicon RFIC quadrature modulator operating from 0.8 GHz to 2.5 GHz, delivering −10 dBm RF output power with 1° rms quadrature phase error and 0.2 dB I/Q amplitude balance at 1.9 GHz. It integrates differential LO interface, V-to-I converters, Gilbert-cell mixers, and a 50 Ω DC-coupled RF output stage, enabling direct QPSK/QAM modulation in cellular/PCS/ISM transceivers.
For engineers reviewing the AD8346ARU-REEL datasheet, AD8346ARU-REEL pinout, AD8346ARU-REEL application, or AD8346ARU-REEL equivalent, key selection criteria include sideband suppression (−36 dBc @ 1.9 GHz), modulation bandwidth (dc–70 MHz), noise floor (−147 dBm/Hz), and 16-lead TSSOP package compatibility with high-density RF layout requirements.
Technical Context
The AD8346ARU-REEL employs a cascaded polyphase network with buffer amplifiers to generate precise I/Q LO signals across 0.8–2.5 GHz, minimizing phase drift and improving SNR. Its dual Gilbert-cell mixers accept differential baseband inputs (IBBP/IBBN, QBBP/QBBN) converted via voltage-to-current stages with 12 kΩ input impedance.
The RF output stage uses a differential-to-single-ended converter driving a 50 Ω load through the VOUT pin, while ENBL controls bias current distribution across LO buffers, mixers, and V-to-I converters-enabling 1 μA standby current and 2.5 μs turn-on time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Frequency Range | 0.8 GHz to 2.5 GHz - supports PCS, DCS, GSM, CDMA, and ISM band operation without external tuning. |
| Quadrature Phase Error | 1° rms @ 1.9 GHz - enables <2.5% EVM for 16-QAM in CDMA systems. |
| I/Q Amplitude Balance | 0.2 dB @ 1.9 GHz - ensures sideband suppression ≥−36 dBc under nominal conditions. |
| Output Power | −10 dBm typ. @ 1.9 GHz - sufficient for direct drive into 50 Ω PA input or IF stage without gain staging. |
| Modulation Bandwidth | dc to 70 MHz - accommodates wideband OFDM and multi-carrier QAM baseband signals. |
| Noise Floor | −147 dBm/Hz @ 20 MHz offset - preserves SNR in low-level receive-path injection or SSB synthesis. |
| Supply Voltage | 2.7 V to 5.5 V - compatible with single-supply 3.3 V or 5 V system rails. |
| Quiescent Current | 45 mA @ 5 V - enables thermal management in compact RF front-end modules. |
Pinout & Package
The AD8346ARU-REEL is housed in a 16-lead TSSOP package (6.5 mm × 5.1 mm × 1.1 mm), specified for −40°C to +85°C operation and optimized for RF layout with dedicated ground pins (COM1–COM4) and decoupled supply pins (VPS1, VPS2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IBBP / IBBN | I-channel baseband differential input | Accepts 2 V p-p differential signal biased at 1.2 V; 12 kΩ input impedance enables direct interface with DACs like AD9761. |
| QBBP / QBBN | Q-channel baseband differential input | Matches I-channel specs; precise amplitude/phase tracking ensures quadrature integrity for complex modulation. |
| LOIP / LOIN | Differential local oscillator input | AC-coupled; internal ~800 mV bias allows direct balun drive (e.g., M/A-COM ETC1-1-13) without level-shifting. |
| VOUT | DC-coupled 50 Ω RF output | Requires external AC coupling; delivers modulated RF directly to filter or PA stage with −13 to −6 dBm range. |
| ENBL | Enable control input | HI threshold = 2.0 V; LO threshold = 0.5 V; controls full device biasing for 1 μA sleep mode and fast 2.5 μs wake-up. |
| VPS1 / VPS2 | Separate supply pins | VPS1 powers LO buffers and bias cell; VPS2 powers V-to-I converters and mixer core-enables independent decoupling. |
| COM1–COM4 | Dedicated ground terminals | Isolate LO, baseband, mixer, and output stage grounds to minimize crosstalk and preserve sideband suppression. |
Key Features
| Feature | Design Value |
|---|---|
| High-accuracy quadrature generation | 1° rms phase error + 0.2 dB amplitude balance @ 1.9 GHz enables >40 dB carrier feedthrough nulling in SSB systems. |
| Broadband modulation support | dc–70 MHz baseband bandwidth allows direct synthesis of LTE, WiMAX, and WLAN OFDM signals without upconversion. |
| Integrated LO phase splitter | Cascaded polyphase networks with buffer amplifiers maintain quadrature fidelity across 0.8–2.5 GHz without external components. |
| Low-noise RF output stage | −147 dBm/Hz noise floor at 20 MHz offset supports high-dynamic-range transmitters in multi-standard radios. |
| Power-efficient enable control | 1 μA standby current and 2.5 μs turn-on time support burst-mode transmission in battery-powered IoT and handheld devices. |
Applications
| Cellular Transceiver Transmit Path | Wireless LAN Baseband Modulation |
|---|---|
|
Use Scenario: Direct RF upconversion in PCS/DCS/GSM handset transceivers using digital baseband I/Q streams. IC Role / Device Role / Timing Role: Quadrature modulator converting 100 kHz–20 MHz baseband signals to 1.8–1.9 GHz RF carriers with minimal image distortion. Use Value: Eliminates discrete mixer + LO synthesizer + phase shifter complexity; achieves −36 dBc sideband suppression without calibration. |
Use Scenario: OFDM symbol mapping in 802.11a/g/n access point radios requiring wide instantaneous bandwidth. IC Role / Device Role / Timing Role: High-linearity RF modulator accepting 2 V p-p differential baseband inputs synchronized to DAC clock. Use Value: Supports 20 MHz channel bandwidth with −60 dBc IM3 and −72 dBc ACPR for compliant 802.11g transmission. |
| CDMA IS-95 Base Station Modulator | Frequency Synthesizer Image-Reject Mixer |
|
Use Scenario: High-fidelity transmit chain in CDMA base station remote radio heads with stringent EVM requirements. IC Role / Device Role / Timing Role: Final-stage modulator driven by AD9761 TxDAC outputs, providing 2.5% EVM at 1.9 GHz. Use Value: Delivers −72 dBc adjacent channel power ratio (ACPR) and 0.9974 rho waveform quality factor per IS-95 spec. |
Use Scenario: Hybrid PLL-based signal generator using DDS + analog multiplier for millihertz-resolution frequency agility. IC Role / Device Role / Timing Role: Image-reject mixer core accepting DDS-generated quadrature LO and analog baseband tuning voltage. Use Value: Enables wideband frequency hopping with <−42 dBm carrier feedthrough after DC offset nulling. |
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 RF range (300 MHz–4 GHz), higher P1dB (+5 dBm), but 2.5× higher quiescent current (110 mA). | Better suited for macro base stations requiring higher output drive; less optimal for portable battery-powered designs. | Select ADL5375-05 when >0 dBm output and extended low-band coverage are required; AD8346ARU-REEL preferred for low-power, mid-band PCS/ISM. |
| TRF3705 | Integrated LO synthesizer + divider; narrower RF range (1.5–2.5 GHz); lower sideband suppression (−28 dBc @ 1.9 GHz). | Reduces BOM count in self-contained transmitters but sacrifices quadrature accuracy and broadband flexibility. | Choose TRF3705 for simplified single-chip transceiver design where LO integration outweighs sideband performance loss. |
Compared with ADL5375-05 and TRF3705, the AD8346ARU-REEL offers superior quadrature accuracy (1° vs. ≥2.5°) and lower power consumption (45 mA vs. 110 mA or 85 mA), making it optimal for precision SSB and battery-constrained wireless infrastructure.
Availability
AD8346ARU-REEL is available at Aetrix Electronics and suitable for cellular transceivers, wireless LAN access points, CDMA base stations, and frequency synthesizer designs requiring stable component supply and long-term RF performance consistency.
Supply support for AD8346ARU-REEL 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 is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and aerospace markets with precision signal processing solutions.
The AD8346 belongs to Analog Devices' RF transceiver modulator product line, engineered specifically for high-fidelity direct-conversion architectures in digital cellular, wireless LAN, and broadband communication systems.
FAQ
What is the recommended LO drive level for optimal performance of the AD8346ARU-REEL?
The AD8346ARU-REEL specifies an LO drive level of −10 dBm for optimal sideband suppression and linearity. While operation between −6 dBm and −12 dBm is supported, −10 dBm yields best-in-class −36 dBc sideband suppression at 1.9 GHz and maintains stable carrier feedthrough across temperature. Higher levels degrade IM3; lower levels increase noise floor.
Can the AD8346ARU-REEL be used with single-ended LO drive?
Yes, the AD8346ARU-REEL accepts single-ended LO drive via LOIP or LOIN with the other pin AC-coupled to ground, as shown in Figure 26 of the datasheet. However, differential LO drive is strongly recommended-single-ended operation degrades LO feedthrough by up to 8 dB, especially above 1.5 GHz, due to reduced common-mode rejection in the phase splitter.
What is the function of the four COM pins on the AD8346ARU-REEL?
The AD8346ARU-REEL features four dedicated ground terminals: COM1 (LO phase splitter/LO buffers), COM2 (input stage of output amplifier), COM3 (output stage of output amplifier), and COM4 (baseband V-to-I converters/mixer core). Separating these grounds minimizes inter-stage coupling and preserves quadrature accuracy and sideband suppression-critical for meeting −36 dBc specification.
How does the ENBL pin affect power consumption and RF output behavior in the AD8346ARU-REEL?
When ENBL is pulled high (>2.0 V), the AD8346ARU-REEL draws 45 mA and delivers full RF output; when pulled low (<0.5 V), bias current drops to 1 μA and RF output ceases. Turn-on time is 2.5 μs (to within 0.5 dB of final SSB power); turn-off time is 12 μs (for supply current to fall below 2 mA). This enables precise burst-mode control in TDMA systems.
What baseband interface configurations are supported by the AD8346ARU-REEL?
The AD8346ARU-REEL supports both DC-coupled and AC-coupled baseband interfaces. DC coupling (e.g., with AD9761) enables precise 1.2 V common-mode bias and offset nulling for <−60 dBm carrier feedthrough. AC coupling preserves full 2 V p-p differential swing and simplifies bias network design-both methods maintain 12 kΩ input impedance and dc-bias tolerance of 0–2.5 V per pin.
AD8346ARU-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Modulator
- LO Frequency:
- 800MHz ~ 2.5GHz
- RF Frequency:
- 800MHz ~ 2.5GHz
- P1dB:
- -3dBm
- Noise Floor:
- -147dBm/Hz
- Output Power:
- -6dBm
- Current - Supply:
- 55 mA
- Voltage - Supply:
- 2.7V ~ 5.5V
- Test Frequency:
- 1.9GHz
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
AD8346ARU-REEL FAQ
1.How can I place an order for AD8346ARU-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8346ARU-REEL 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 AD8346ARU-REEL reliable?
The price and inventory of AD8346ARU-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8346ARU-REEL is usually 5 days.
3.What payment methods are accepted for AD8346ARU-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8346ARU-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8346ARU-REEL?
AD8346ARU-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8346ARU-REEL 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 AD8346ARU-REEL?
For technical support, including AD8346ARU-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8346ARU-REEL requirements.
6.How does Aetrix verify that AD8346ARU-REEL is sourced from the original manufacturer or authorized distributors?
All AD8346ARU-REEL 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 AD8346ARU-REEL meets industry standards.
7.What is the process for return or replacement of AD8346ARU-REEL?
All AD8346ARU-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD8346ARU-REEL, 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 AD8346ARU-REEL part is unused and in its original packaging.
Return procedure for AD8346ARU-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD8346ARU-REEL Tags
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