MAX7036 datasheet(6/12 Pages) MAXIM

Part #	MAX7036

Description	300MHz to 450MHz ASK Receiver with Internal IF Filter

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Manufacturer	MAXIM [Maxim Integrated Products]

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6 / 12 page

300MHz to 450MHz ASK Receiver

with Internal IF Filter

6

_______________________________________________________________________________________

Pin Description

Typical Operating Characteristics (continued)

(

Typical Application Circuit, VAVDD = VDD = VDVDD = 3.3V, fRF = 315MHz, TA = +25°C, unless otherwise noted.)

NAME

FUNCTION

1

ENABLE

Enable Input. Internally pulled down to ground. Set VENABLE = VDD for normal operation.

2

XTAL2

Crystal Input 2. Connect an external crystal from XTAL2 to XTAL1. Can also be driven with an AC-

coupled external reference oscillator (see the Crystal Oscillator section).

3

XTAL1

Crystal Input 1. Connect an external crystal from XTAL2 to XTAL1. Bypass to GND if XTAL2 is driven

from an AC-coupled external reference (see the Phase-Locked Loop section).

4

AVDD

Positive Analog Supply Voltage. Connect to DVDD. Bypass to GND with a 0.1µF capacitor as close as

possible to the device (see the Typical Application Circuit). For 5.0V operation, AVDD is internally

connected to an on-chip 3.2V LDO regulator. For 3.3V operation, connect AVDD to VDD.

5

LNAIN

Low-Noise Amplifier Input. Must be AC-coupled (see the Low-Noise Amplifier section).

6

LNAOUT

Low-Noise Amplifier Output. Must be connected to AVDD through a parallel LC tank circuit. AC-

couple to MIXIN2 (see the Low-Noise Amplifier section).

7

MIXIN2

2nd Differential Mixer Input. Connect to the LNAOUT side of the LC tank filter through a 100pF

capacitor (see the Typical Application Circuit).

8

MIXIN1

1st Differential Mixer Input. Connect to the AVDD side of the LC tank filter through a 100pF capacitor

(see the Typical Application Circuit).

9

IFC2

IF Filter Capacitor Connection 2. This is for the Sallen-Key IF filter. Connect a capacitor from IFC2 to GND.

The value of the capacitor is determined by the IF filter bandwidth (see the Typical Application Circuit).

10

IFC1

IF Filter Capacitor Connection 1. This is for the Sallen-Key IF filter. Connect a capacitor from IFC1 to IFC3.

The value of the capacitor is determined by the IF filter bandwidth (see the Typical Application Circuit).

11

IFC3

IF Filter Capacitor Connection 3. This is for the Sallen-Key IF filter. Connect a capacitor from IFC3 to IFC1.

The value of the capacitor is determined by the IF filter bandwidth (see the Typical Application Circuit).

12

DVDD

Positive Digital Supply Voltage Input. Connect to AVDD. Bypass to GND with a 0.01µF capacitor as

close as possible to the device (see the Typical Application Circuit).

REGULATOR VOLTAGE

vs. REGULATOR CURRENT

REGULATOR CURRENT (mA)

20

25

15

10

5

3.05

3.10

3.15

3.00

0

TA = -40

°C

TA = +25

°C

TA = +85

°C

TA = +105

°C

VDD = 5V, +5V CIRCUIT

PHASE NOISE vs. OFFSET FREQUENCY

OFFSET FREQUENCY (kHz)

100

10,000

1

-70

-60

-50

-120

-110

-100

-90

-80

0.01

fRF = 315MHz

PHASE NOISE vs. OFFSET FREQUENCY

OFFSET FREQUENCY (kHz)

100

10,000

1

-70

-60

-50

-120

-110

-100

-90

-80

0.01

fRF = 433MHz

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