LTC5598 - 5MHz to 1600MHz High Linearity Direct Quadrature Modulator
Features
- Frequency Range: 5MHz to 1600MHz
- High Output IP3:
+27.7dBm at 140MHz
+22.9dBm at 900MHz - Low Output Noise Floor at 6MHz Offset:
No Baseband AC Input: -161.2dBm/Hz
POUT = 5.5dBm: -160dBm/Hz - Low LO Feedthrough: -55dBm at 140MHz
- High Image Rejection: -50.4dBc at 140MHz
- Integrated LO Buffer and LO Quadrature Phase Generator
- 50Ω Single-Ended LO and RF Ports
- >400MHz Baseband Bandwidth
- 24-Lead QFN 4mm x 4mm Package
- Pin-Compatible with Industry Standard Pin-Out
- Shut-down Mode
Typical Application
Description
The LTC5598 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports point-to-point microwave link, GSM, EDGE, CDMA, 700MHz band LTE, CDMA2000, CATV applications and other systems. It may also be configured as an image reject upconverting mixer, by applying 90° phase-shifted signals to the I and Q inputs.The I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to a buffer, which converts the differential mixer signals to a 50Ω single-ended buffered RF output. The four balanced I and Q baseband input ports are intended for DC coupling from a source with a common-mode voltage level of about 0.5V. The LO path consists of an LO buffer with single-ended or differential inputs, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V, with about 168mA current.
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 |
|---|---|---|---|---|---|---|
| LTC5598IUF#PBF | QFN | 24 | I | $7.39 | $5.19 | View |
| LTC5598IUF#TRPBF | QFN | 24 | I | $5.24 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request 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 |
|---|---|---|---|
| DC1455A | LTC5598IUF | 5MHz to 1.6GHz I-Q Modulator | $125.00 | |
| Buy Now | |||
Applications
- Point-to-Point Microwave Link
- Military Radio
- Basestation Transmitter GSM/EDGE/CDMA2K
- 700MHz LTE Basestation Transmitter
- Satellite Communication
- CATV/Cable Broadband Modulators
- 13.56MHz/UHF RFID Modulator
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-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.