U2794B-NFSH

U2794B-NFSH Datasheet


U2794B

Part Datasheet
U2794B-NFSH U2794B-NFSH U2794B-NFSH (pdf)
Related Parts Information
U2794B-NFSG3H U2794B-NFSG3H U2794B-NFSG3H
PDF Datasheet Preview
• Supply Voltage 5V
• Very Low Power Consumption 125 mW
• Very Good Image Rejection By Means of Phase Control Loop for Precise 90° Phase

Shifting
• Duty-cycle Regeneration for Single-ended LO Input Signal
• Low LO Input Level dBm
• LO Frequency from 70 MHz to 1 GHz
• Power-down Mode
• 25 dB Gain Control
• Very Low I/Q Output DC Offset Voltage Typically < 5 mV
• Low Current Consumption
• Easy to Implement
• Perfect Performance for Large Variety of Wireless Applications

Electrostatic sensitive device. Observe precautions for handling.
1000-MHz Quadrature Demodulator

U2794B

The silicon monolithic integrated circuit U2794B is a quadrature demodulator manufactured using Atmel’s advanced UHF technology. This demodulator features a frequency range from 70 MHz to 1000 MHz, low current consumption, selectable gain, power-down mode and adjustment-free handling. The IC is suitable for direct conversion and image rejection applications in digital radio systems up to 1 GHz such as cellular radios, cordless telephones, cable TV and satellite TV systems.

Figure Block Diagram
5,6 14

Power down

RFin 7 8
11 GC

OUTPUT 2I
90°Control loop
16,18 GND
0° 90°

Frequency doubler

Duty cycle 15 LO regenerator 17
13 PC 12 PCX

OUTPUT 20 QX

Pin Configuration

Figure Pinning SSO20

I2 II 3

IIX 4

RFin 7

RFXin 8

QQX 10
20 QX 19 Q 18 GND 17 LOin 16 GND 15 LOXin 14 PU 13 PC 12 PCX 11 GC
2 U2794B

Table Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Pin Description

Symbol Function

IX output

I output

II lowpass filter I

IIX lowpass filter I

VS RFin RFXin QQ

Supply voltage Supply voltage RF input RFX input QQ lowpass filter Q

QQX lowpass filter Q

GC gain control

PCX phase control
Ordering Information

Extended Type Number U2794B-NFSH U2794B-NFSG3H

Package Information

Package SSO20

Dimensions in mm

Package SSO20

Remarks Tube, MOQ 830 pcs, Pb-free Taped and reeled, MOQ 4000 pcs, Pb-free
technical drawings according to DIN specifications
14 U2794B

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Printed on recycled paper.
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Datasheet ID: U2794B-NFSH 519475