MAX7030 datasheet(11/20 Pages) MAXIM

Part #	MAX7030

Description	Low-Cost, 315MHz, 345MHz, and 433.92MHz ASK Transceiver with Fractional-N PLL

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Manufacturer	MAXIM [Maxim Integrated Products]

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Low-Cost, 315MHz, 345MHz, and 433.92MHz

ASK Transceiver with Fractional-N PLL

______________________________________________________________________________________

11

Pin Description

NAME

FUNCTION

1

PAVDD

Power-Amplifier Supply Voltage. Bypass to GND with 0.01µF and 220pF capacitors placed as close

to the pin as possible.

2

ROUT

Envelope-Shaping Output. ROUT controls the power-amplifier envelope’s rise and fall times. Connect

ROUT to the PA pullup inductor or optional power-adjust resistor. Bypass the inductor to GND as

close to the inductor as possible with 680pF and 220pF capacitors, as shown in the Typical

Application Circuit.

3

TX/RX1

Transmit/Receive Switch Throw. Drive T/R high to short TX/RX1 to TX/RX2. Drive T/R low to disconnect

TX/RX1 from TX/RX2. Functionally identical to TX/RX2.

4

TX/RX2

Transmit/Receive Switch Pole. Typically connected to ground. See the Typical Application Circuit.

5

PAOUT

Power-Amplifier Output. Requires a pullup inductor to the supply voltage (or ROUT if envelope

shaping is desired), which can be part of the output-matching network to an antenna.

6AVDD

Analog Power-Supply Voltage. AVDD is connected to an on-chip +3.0V regulator in 5V operation.

Bypass AVDD to GND with a 0.1µF and 220pF capacitor placed as close to the pin as possible.

7

LNAIN

Low-Noise Amplifier Input. Must be AC-coupled.

8

LNASRC

Low-Noise Amplifier Source for External Inductive Degeneration. Connect an inductor to GND to set

the LNA input impedance.

9

LNAOUT

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

to MIXIN+.

10

MIXIN+

Noninverting Mixer Input. Must be AC-coupled to the LNA output.

11

MIXIN-

Inverting Mixer Input. Bypass to AVDD with a capacitor as close to the LNA LC tank filter as possible.

12

MIXOUT

330

Ω Mixer Output. Connect to the input of the 10.7MHz filter.

13

IFIN-

Inverting 330

Ω IF Limiter-Amplifier Input. Bypass to GND with a capacitor.

14

IFIN+

Noninverting 330

Ω IF Limiter-Amplifier Input. Connect to the output of the 10.7MHz IF filter.

15

PDMIN

Minimum-Level Peak Detector for Demodulator Output

16

PDMAX

Maximum-Level Peak Detector for Demodulator Output

17

DS-

Inverting Data Slicer Input

18

DS+

Noninverting Data Slicer Input

19

OP+

Noninverting Op-Amp Input for the Sallen-Key Data Filter

20

DF

Data-Filter Feedback Node. Input for the feedback capacitor of the Sallen-Key data filter.

21, 25

N.C.

No Connection. Do not connect to this pin.

22

T/R

Transmit/Receive. Drive high to put the device in transmit mode. Drive low or leave unconnected to

put the device in receive mode. It is internally pulled down.

23

ENABLE

Enable. Drive high for normal operation. Drive low or leave unconnected to put the device into shut-

down mode.

24

DATA

Receiver Data Output/Transmitter Data Input

26

DVDD

Digital Power-Supply Voltage. Bypass to GND with a 0.01µF and 220pF capacitor placed as close to

the pin as possible.

27

HVIN

High-Voltage Supply Input. For 3V operation, connect HVIN to AVDD, DVDD, and PAVDD. For 5V

operation, connect only HVIN to 5V. Bypass HVIN to GND with a 0.01µF and 220pF capacitor placed

as close to the pin as possible.

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