FM Transmitter & Receiver Modules

DS-070-9

Technical Specifications

Pin Description

RSSI Output*

RRFQ1

Pin Description

1

+Vcc

2, 7,11

GND

3

Data In (Antenna)

12

NC

13

Received Signal Strength Out-

put

N/A

AF Output

14

Data Out

15

Power Down 0V = Standby

5V = Operating

RF In (dBm)

RSSI (V)

-120

1.20

-110

1.32

-100

1.50

-90

1.78

-80

2.06

-70

2.35

-60

2.62

-50

2.72

-40

2.75

Electrical Characteristics

Min

Typical

Max

Dimension

Notes

Supply Voltage (Vcc)

4.5

5

5.5

V

Supply Current (Operating)

5.7

6.8

mA

Supply Current (Standby)

100

nA

Receiver Frequency

315.00

433.92

868.35

MHz

R.F Sensitivity

315 ,433MHZ versions

868MHz versions

-103

-100

dBm

3dB Bandwidth

+/-150

KHz

Data Rate

RRFQ1 CTC

RRFQ1 /RRFQ2

300

300

9,600

4,800

Hz

Turn on Time

5

mSecs

1

Turn on Time

8

mSecs

2

Level of Emitted Spectrum

-70

dBm

Low Level Output Voltage

0.8

V

I = 200uA

High Level Output Voltage

Vcc-1

V

I = 200uA

RSSI Output

0.95

mA

Operating Temperature Range

-25

+80

o

C

Notes

Time from PD pin going high to stable data. (RRFQ1 only)

Time from Power ON to stable data.

RSSI Output

The RSSI provides a DC Voltage proportional to the peak value of the receive data signal. This

output can be used as an indicator for the received signal strength to use in wake-up circuits etc.

An used to provide the timing for the RSSI signal. The modules have a 10nF capacitor internally

connected tRC circuit is normally o GND, therefore a pull down resistor (to GND) connected to

the RSSI pin may be used to generate a simple RC network time constant for the RSSI signal

output.

Please note that the maximum output current is typically 950µA, the discharge current is lower

than 2µA.