LTC5585 - Wideband IQ Demodulator with IIP2 and DC Offset Control
Features
- 700MHz to 3GHz Operating Frequency
- High IIP3: 28.7dBm at 700MHz, 25.7dBm at 1.95GHz
- High IIP2: 70dBm at 700MHz, 60dBm at 1.95GHz
- User Adjustable IIP2 Up to 80dBm
- User Adjustable DC Offset Null
- High Input P1dB: 16dBm at 1950MHz
- I/Q Bandwidth of 530MHz or Higher
- Image Rejection: 43dB at 1950MHz
- Noise Figure: 13.5dB at 700MHz
12.7dB at 1.95GHz - Conversion Gain: 2.0dB at 700MHz
2.4dB at 1.95GHz - Single-Ended RF with On-Chip Transformer
- Shutdown Mode
- Operating Temperature Range (TC): –40°C to 105°C
- 24-Lead 4mm × 4mm QFN Package
Typical Application
Description
The LTC®5585 is a direct conversion quadrature demodulator optimized for high linearity receiver applications in the 700MHz to 3GHz frequency range. It is also usable in the 400MHz to 700MHz and 3GHz to 4GHz ranges with reduced performance. It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth of 530MHz or higher. The LTC5585 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter. The integrated on-chip broadband transformer provides a single-ended interface at the RF input with simple off-chip L-C matching. In addition, the LTC5585 provides four analog control voltage interface pins for IIP2 and DC offset correction, greatly simplifying system calibration.
The high linearity of the LTC5585 provides excellent spurfree dynamic range for the receiver. This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering. These I/Q outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
QFN-24
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LTC5585IUF#PBF | QFN | 24 | I | $8.54 | $5.98 | View |
| LTC5585IUF#TRPBF | QFN | 24 | I | $6.04 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1662A | LTC5585 Demo | Wideband I/Q Demodulator with IIP2 and DC Offset Control | Contact Factory | |
| Buy Now | |||
Applications
- LTE/W-CDMA/TD-SCDMA Base Station Receivers
- Wideband DPD Receivers
- Point-To-Point Broadband Radios
- High Linearity Direct Conversion I/Q Receivers
- Image Rejection Receivers
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Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.