ATR0797 datasheet, PDF - EEWORLD Datasheet

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ATR0797: Description65-300 MHZ SIGE IF RECEIVER DEMODULATOR; CategoryWireless rf/communication Telecom circuit; File Size450KB，11 Pages; ManufacturerAtmel (Microchip)

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ATR0797 Overview

65-300 MHZ SIGE IF RECEIVER DEMODULATOR

ATR0797 Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Parts packaging code	SOIC
package instruction	HTSSOP, TSSOP16,.25
Contacts	16
Reach Compliance Code	unknow
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
length	5 mm
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	HTSSOP
Encapsulate equivalent code	TSSOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	5 V
Certification status	Not Qualified
Maximum seat height	1.15 mm
Nominal supply voltage	5 V
surface mount	YES
Telecom integrated circuit types	BASEBAND CIRCUIT
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	4.4 mm
Base Number Matches	1

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Features

•

Gain Control in 20-dB Steps

Very Low I/Q Amplitude and Phase Errors

High Input P1dB

Small and Optimized Package for High Reliability and Performance

Applications

•

Infrastructure Digital Communication Systems

•

GSM/Cellular Transceivers

•

ISM Band Transceivers

Benefits

•

Fully Integrated Device with Reduced External Component Count

65 - 300 MHz

SiGe IF

Receiver/

Demodulator

ATR0797

Electrostatic sensitive device.

Observe precautions for handling.

Description

The ATR0797 is a multi-purpose demodulator RFIC. The silicon monolithic integrated

circuit is designed with Atmel’s advanced SiGe technology. This demodulator is capa-

ble of both quadrature demodulation or direct IF output. Features include switchable

gain control on a frequency range from 65 MHz to 300 MHz. The device performs a

very low amplitude as well as phase error and allows high input P1dB. The ATR0797

targets a variety of system applications for communications including 3G wireless.

Figure 1.

Block Diagram

GC1

GC2

BBIP

BBIN

IFP

IFN

13 12

BBQP

BBQN

LOP

LON

Rev. 4665D–SIGE–08/04

ATR0797

Product Description

Atmel’s ATR0797 is a variable gain I-Q demodulator designed for use in receiver IF sec-

tions, that are typically existing in superheterodyne RF architectures.

The ATR0797 has two gain stages that are independent of each other. These gain

stages are broadband differential amplifiers each with a digital control pin to set the

gain. Since the amplifiers have approximately the same gain, setting GC1 high and GC2

low results in approximately the same gain as setting GC1 low and GC2 high. Former

setting offers better noise figures.

The IF input is a differential input that has internal bias circuitry to set the common mode

voltage. The use of blocking capacitors to facilitate AC coupling is highly recommended

to avoid changing the common mode voltage. Either input may be driven single ended if

the other input is connected to ground through an AC short such as a 1000 pF capacitor.

This typically results in slightly lower input P1dB.

The two matched mixers are configured with the quadrature LO generator to provide in-

phase and quadrature baseband outputs.

The LO and IF ports offer a differential 50

Ω

impedance. The passives at these ports

(parallel L-R network) and the package itself adds inductance that tends to degrade

return loss.

The ATR0797 features immunity from changes in LO power. The gain features change

by less than 0.6 dB over a 6 dB range of LO power. Also note the excellent I/Q balance,

which typically falls within 0.1 dB and 1 degree from 65 MHz to 300 MHz, and varies

less than 0.05 dB and 0.5 degree over temperature (-40°C to +85°C).

The frequency response of the IF and LO ports is dominated by the L-R network on the

input. When de-embedded, the gain and P1dB response is within 0.5 dB from 65 MHz to

300 MHz.

The figures in the datasheet illustrate a typical ATR0797’s performance with respect to

temperature. Note that these numbers include the effect of the R-L network in the IF

port.

Evaluation board design and equipment constraints:

Please take into account that the evaluation board uses baluns on the I/Q outputs, and

these baluns limit the low frequency response of the device. For true baseband opera-

tion, the baluns should be removed, and the differential signals used directly.

The 27 pF capacitor on the evaluation board is appropriate for lower frequencies.

4665D–SIGE–08/04

ATR0797 Related Products

	ATR0797	ATR0797-6CPH
Description	65-300 MHZ SIGE IF RECEIVER DEMODULATOR	65-300 MHZ SIGE IF RECEIVER DEMODULATOR
Is it Rohs certified?	incompatible	conform to
Parts packaging code	SOIC	TSSOP
package instruction	HTSSOP, TSSOP16,.25	TSSOP, SSOP16,.25
Contacts	16	16
Reach Compliance Code	unknow	compli
JESD-30 code	R-PDSO-G16	R-PDSO-G16
JESD-609 code	e0	e3
length	5 mm	5 mm
Number of functions	1	1
Number of terminals	16	16
Maximum operating temperature	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HTSSOP	TSSOP
Encapsulate equivalent code	TSSOP16,.25	SSOP16,.25
Package shape	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	260
power supply	5 V	5 V
Certification status	Not Qualified	Not Qualified
Maximum seat height	1.15 mm	1.15 mm
Nominal supply voltage	5 V	5 V
surface mount	YES	YES
Telecom integrated circuit types	BASEBAND CIRCUIT	BASEBAND CIRCUIT
Temperature level	INDUSTRIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)	Matte Tin (Sn) - annealed
Terminal form	GULL WING	GULL WING
Terminal pitch	0.65 mm	0.65 mm
Terminal location	DUAL	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED	40
width	4.4 mm	4.4 mm
Base Number Matches	1	1

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