Overview
The AD8349ARE-REEL7 is a silicon, monolithic, RF quadrature modulator designed and manufactured by Analog Devices Inc. This component is optimized for operation within the frequency range of 700 MHz to 2700 MHz, making it highly suitable for various wireless communication systems. The AD8349 features excellent phase accuracy and amplitude balance, enabling high-performance direct RF modulation. It is fabricated using Analog Devices’ advanced complementary silicon bipolar process and is available in a 16-lead, exposed-paddle TSSOP package.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Frequency Range | 700 | - | 2700 | MHz |
| Supply Voltage (VPS1 and VPS2) | 4.75 | 5.0 | 5.5 | V |
| Supply Current (ENOP = High) | 130 | - | 150 | mA |
| Supply Current (ENOP = Low) | 130 | - | 145 | mA |
| Phase Quadrature Error @ 2140 MHz | - | 0.3 | - | degrees |
| Amplitude Balance @ 2140 MHz | - | 0.1 | - | dB |
| Output Power (P1dB) | - | - | 5.6 | dBm |
| Operating Temperature Range | -40 | - | +85 | °C |
| Turn-On Settling Time (ENOP Low to High) | - | - | 20 | ns |
| Turn-Off Settling Time (ENOP High to Low) | - | - | 50 | ns |
Key Features
- High dynamic range and modulation accuracy, making it suitable for complex modulation formats.
- Differential LO input signal buffered and split into in-phase (I) and quadrature-phase (Q) signals using a polyphase phase splitter.
- Two Gilbert cell mixers for mixing LO signals with baseband signals.
- Output amplifier designed to drive 50 Ω loads.
- Fast switching capability: RF output can be switched on and off within 50 ns.
- Pin compatible with AD8345/AD8346.
- Available in a 16-lead, exposed-paddle TSSOP package.
Applications
- Cellular/PCS communication systems infrastructure.
- WCDMA/CDMA2000/PCS/GSM/EDGE base stations.
- Wireless LAN and wireless local loop systems.
- Local multipoint distribution systems (LMDS) and broadband wireless access systems.
- QPSK or QAM broadband wireless access transmitters.
Q & A
- What is the frequency range of the AD8349?
The AD8349 operates within the frequency range of 700 MHz to 2700 MHz.
- What is the supply voltage range for the AD8349?
The supply voltage range is from 4.75 V to 5.5 V.
- What is the typical supply current when ENOP is high?
The typical supply current when ENOP is high is 135 mA to 150 mA.
- What is the phase quadrature error at 2140 MHz?
The phase quadrature error at 2140 MHz is 0.3 degrees.
- How quickly can the RF output be switched on and off?
The RF output can be switched on and off within 50 ns.
- What type of package is the AD8349 available in?
The AD8349 is available in a 16-lead, exposed-paddle TSSOP package.
- What are some of the key applications of the AD8349?
Key applications include cellular/PCS communication systems, WCDMA/CDMA2000/PCS/GSM/EDGE base stations, and LMDS/broadband wireless access systems.
- How does the AD8349 handle baseband signals?
The AD8349 uses two Gilbert cell mixers to mix the LO signals with the corresponding I and Q channel baseband signals.
- What is the operating temperature range of the AD8349?
The operating temperature range is from -40°C to +85°C.
- Is the AD8349 pin compatible with other models?
Yes, the AD8349 is pin compatible with AD8345/AD8346.
