ADF7021-VBCPZ-RL Analog Devices Inc, ADF7021-VBCPZ-RL Datasheet - Page 52

• Manufacturer Part Number: ADF7021-VBCPZ-RL
• Description: Narrow Band Transceiver 433/868/900 MHz
• Manufacturer: Analog Devices Inc

Specifications of ADF7021-VBCPZ-RL

• Frequency: 80MHz ~ 960MHz
• Data Rate - Maximum: 24 kbps
• Modulation Or Protocol: FSK
• Applications: ISM
• Power - Output: 13dBm
• Sensitivity: -125dBm
• Voltage - Supply: 2.3 V ~ 3.6 V
• Current - Receiving: 21.7mA
• Current - Transmitting: 27.1mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-VFQFN, CSP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADF7021-V
REGISTER 7—READBACK SETUP REGISTER
•
•
Readback of the measured RSSI value is valid only in Rx
mode. Readback of the battery voltage, temperature sensor,
or voltage at the external ADCIN pin is not valid in Rx mode.
To read back the battery voltage, the temperature sensor, or
the voltage at the external ADCIN pin in Tx mode, the user
should first power up the ADC using Register 8, Bit DB8
because it is turned off by default in Tx mode to save power.
RB3
0
1
READBACK_SELECT
DISABLED
ENABLED
Figure 69. Register 7—Readback Setup Register Map
DB8
RB3
RB2
0
0
1
1
READBACK_
SELECT
DB7
RB2
RB1
0
1
0
1
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READBACK MODE
AFC WORD
ADC OUTPUT
FILTER CAL
SILICON REV
DB6
RB1
DB5
AD2
MODE
ADC_
•
DB4
AD1
For AFC readback, use the following equations (see the
Readback Format section):
FREQ RB (Hz) = (AFC READBACK × DEMOD CLK)/2
V
V
Temperature (°C) = −40 + [(68.4 − TEMP READBACK) × 9.32]
BATTERY
ADCIN
AD2
0
0
1
1
C4 (0)
DB3
= ADCIN VOLTAGE READBACK/42.1
AD1
0
1
0
1
= BATTERY VOLTAGE READBACK/21.1
C3 (1)
DB2
CONTROL
ADC_MODE
MEASURE RSSI
BATTERY VOLTAGE
TEMP SENSOR
TO EXTERNAL PIN
BITS
C2 (1) C1 (1)
DB1
DB0
18