HMC1197LP7FE datasheet(50/57 Pages) AD

50 / 57 page

For price, delivery, and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

HMC1197LP7FE

v03.0314

Wideband direct Quadrature Modulator

w/ Fractional-n Pll & Vco, 100 - 4000 MHz

3.0

application information

3.1

Principle of operation

Figure 43. The HMC1197LP7FE Simplified Block Diagram

The HMC1197LP7FE is a low-noise, high-linearity, Direct Quadrature Modulator with Fractional-N

PLL&VCO RFIC designed for directly converting complex modulated baseband signals from zero IF or low

IF to RF transmission levels from 100 MHz to 4 GHz. The HMC1197LP7FE’s excellent noise and linearity

performance makes it suitable for a wide range of transmission standards, including single and multicarrier

CDMA, UMTS, CDMA2000, GSM/EDGE, W-CDMA, TD-SCDMA, and WiMAX/LTE applications.

As shown in the simplified block diagram (Figure 43) the HMC1197LP7FE offers an easy-to-use, complete

direct conversion solution in a highly compact 7 x 7 mm plastic package thereby reducing cost, area, and

power consumption.

The HMC1197LP7FE modulator consists of the following functional blocks:

1. PLL & VCO “1.0 Theory of Operation”

2. I/Q modulator: I and Q input differential voltage-to-current converters, I and Q upconverting mixers and

the differential-to-single-ended converter, high Accuracy LO quadrature phase splitter and LO limiting

amplifiers

3. Harmonic Low Pass Filter

3.2

i/Q Modulator

The differential baseband inputs (QP, QN, IP, and IN) present a high impedance. The DC common-mode

voltage at the baseband inputs sets the currents in the I and Q double-balanced mixers. The nominal

baseband input DC common-mode voltage used in the characterization of the HMC1197LP7FE is 0.45V,

which should be externally applied. The baseband input DC common-mode voltage can be varied between

0.4V and 0.5V to optimize overall modulator performance. It is not recommended to leave the baseband

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D

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