Overview
The AD8345AREZ-RL7 is a high-performance quadrature modulator designed and manufactured by Analog Devices Inc. This device operates within a frequency range of 140 MHz to 1000 MHz, making it suitable for various wireless communication and broadcasting applications. Fabricated on Analog Devices' advanced silicon bipolar process, the AD8345 offers excellent phase accuracy and amplitude balance, enabling the direct modulation of IF carriers with high precision.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Frequency | 140 MHz to 1000 MHz |
| P1dB @ 800 MHz | +2.5 dBm |
| Noise Floor | −155 dBm/Hz |
| RMS Phase Error (IS95) | 0.5 degrees |
| Amplitude Balance | 0.2 dB |
| Supply Voltage | 2.7 V to 5.5 V |
| Package Type | 16-lead TSSOP_EP |
| Operating Temperature Range | −40°C to +85°C |
| Storage Temperature Range | −65°C to +150°C |
| Maximum Junction Temperature | 150°C |
Key Features
- Single 2.7 V to 5.5 V supply voltage
- Pin-compatible with AD8346 and AD8349
- Excellent phase accuracy and amplitude balance
- Differential LO drive for maximum LO suppression
- Enable pin with turn-on and turn-off times of 2.5 μs and 1.5 μs, respectively
- Low standby current of 70 μA
Applications
- IF transmit modulator in digital communication systems such as GSM, PCS, W-CDMA, and CDMA transceivers
- Direct modulation of LO signals for QPSK and various QAM formats in 900 MHz communication systems
- Digital TV and CATV systems
- Hybrid phase-locked loops with direct digital synthesizers
- Wireless LAN, wireless local loop, and fixed broadband access systems
Q & A
- What is the operating frequency range of the AD8345? The AD8345 operates from 140 MHz to 1000 MHz.
- What is the typical P1dB at 800 MHz for the AD8345? The typical P1dB at 800 MHz is +2.5 dBm.
- What is the noise floor of the AD8345? The noise floor is −155 dBm/Hz.
- What is the RMS phase error of the AD8345 according to IS95 standards? The RMS phase error is 0.5 degrees.
- What is the amplitude balance of the AD8345? The amplitude balance is 0.2 dB.
- What is the supply voltage range for the AD8345? The supply voltage range is 2.7 V to 5.5 V.
- What package type is the AD8345 available in? The AD8345 is available in a 16-lead TSSOP_EP package.
- What is the operating temperature range of the AD8345? The operating temperature range is −40°C to +85°C.
- How does the enable pin function on the AD8345? The enable pin must be pulled high for normal operation, with a turn-on threshold of VS/2 and turn-on and turn-off times of 2.5 μs and 1.5 μs, respectively.
- What are some common applications of the AD8345? Common applications include IF transmit modulators in digital communication systems, direct modulation in 900 MHz communication systems, and use in digital TV, CATV, and hybrid phase-locked loops.
