SI4322-A1-FT Silicon Laboratories Inc, SI4322-A1-FT Datasheet - Page 19

• Manufacturer Part Number: SI4322-A1-FT
• Description: IC RCVR FSK 915MHZ 3.8V 16-TSSOP
• Manufacturer: Silicon Laboratories Inc
• Type: FSK Receiverr

Specifications of SI4322-A1-FT

• Package / Case: 16-TSSOP
• Frequency: 868MHz, 915MHz
• Sensitivity: -104dBm
• Data Rate - Maximum: 256 kbps
• Modulation Or Protocol: FSK
• Applications: Remote Control, RKE, Security Systems
• Current - Receiving: 14mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Features: RSSI Equipped
• Voltage - Supply: 2.2 V ~ 3.8 V
• Operating Frequency: 915 MHz
• Operating Supply Voltage: 2.5 V, 3.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Current: 12 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Memory Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed
• Other names: 336-1628-5

Bit 5:4 <g1 : g0>: Set the LNA gain:
Bit 3:1 <r2 : r0>: Control the threshold of the RSSI detector:
The RSSI threshold depends on the LNA gain, the real RSSI threshold can be calculated:
Bit 0 <en>: Enables the whole receiver chain and crystal oscillator when set. Enable/disable of the wake-up timer
and the low battery detect or are not affected by this setting.
5.6. Synchron Pattern Command
The synchron pattern consists of two bytes. Byte 1 is fixed 2Dh, Byte 0 is programmable (default D4h) by B <b7 : b0>. For
more details, see
5.7. Wake-Up Timer Command
The wake-up time period can be calculated by M <m13 : m0> , R <r3 : r0> and C <c1 : c0>:
The upper six bits of M <m13 : m8> and the C <c1 : c0> parameter can be found in the Extended Wake-Up Timer
Command, see below.
Note: The wake-up timer generates interrupts continuously at the programmed interval while the et bit ("5.3. Configuration Set-
Bit
Bit
ting Command" on page 16) is set.
15
15
1
1
14
14
1
1
"5.14. FIFO Settings Command" on page 25
13
13
0
1
RSSI
T
wake-up
12
12
0
0
th
= RSSI
11
11
r3
= M x 2
0
g1
0
0
1
1
10
10
r2
g0
setth
0
0
1
0
1
r2
R – C
0
0
0
0
1
1
1
1
+ G
r1
G
9
0
9
ms
r1
0
0
1
1
0
0
1
1
LNA
LNA
r0
8
1
8
r0
0
1
0
1
0
1
0
1
(dB relative to maximum gain)
m7 m6 m5 m4 m3 m2 m1 m0
b7
Rev. 1.2
7
7
RSSI
.
b6
6
6
–12
–18
–6
setth
0
–103
–97
–91
–85
–79
–73
–67
–61
b5
5
5
[dBm]
b4
4
4
b3
3
3
b2
2
2
b1
1
1
b0
0
0
Si4322
C1D4h
E196h
POR
POR
19