MC33596FJE Freescale Semiconductor, MC33596FJE Datasheet - Page 8

• Manufacturer Part Number: MC33596FJE
• Description: IC RECEIVER UHF PLL TUNED 32LQFP
• Manufacturer: Freescale Semiconductor
• Type: Receiverr

Specifications of MC33596FJE

• Frequency: 304, 315, 426, 434, 868 & 915MHz
• Sensitivity: -104dBm
• Data Rate - Maximum: 22.4 kBaud
• Modulation Or Protocol: FSK, OOK
• Applications: General Data Transfer
• Current - Receiving: 10.3mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.7 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Operating Frequency: 915 MHz
• Operating Supply Voltage: 3.3 V or 5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Modulation Type: FSK/OOK
• Package Type: LQFP
• Operating Supply Voltage (min): 2.7V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Frequency Planning
8.2
The IF filter is controlled by the crystal oscillator to guarantee the frequency over temperature and voltage
range. The IF filter center frequency, FIF, can be computed using the crystal frequency f
of the CF bits:
The cut-off frequency given in the parametric section can be computed by scaling to the FIF.
8.3
The frequency synthesizer consists of a local oscillator (LO) driven by a fractional N phase locked loop
(PLL).
The LO is an integrated LC voltage controlled oscillator (VCO) operating at twice the RF frequency (for
the 868 MHz frequency band) or four times the RF frequency (for the 434 MHz and 315 MHz frequency
bands). This allows the I/Q signals driving the mixer to be generated by division.
The fractional divider offers high flexibility in the frequency generation for:
Frequencies are controlled by means of registers. To allow for user preference, two programming access
methods are offered (see
1. Refer to parameter 3.3 found in
8
Frequency
433.92
(MHz)
868.3
916.5
304
315
426
•
•
•
•
•
RF
If CF[0] = 0 : FIF = f
If CF[0] = 1 : FIF = f
Compute the low cut-off frequency of the IF filter for a 16.9683 MHz crystal oscillator. For this
reference frequency, FIF = 1.414 MHz.
So, the 1.387 MHz
1.387 × 1.414/1.5 = 1.307 MHz.
Performing multi-channel links.
Trimming the RF carrier.
In friendly access, all frequencies are computed internally from the contents of the carrier
frequency and deviation frequency registers.
Intermediate Frequency
Frequency Synthesizer Description
CF1
0
0
0
0
1
1
CF0
Table 4. Crystal Frequency and CF Values Versus Frequency Band
0
0
1
1
1
1
Section 16.3, “Frequency
LOF1
1
0
1
1
0
0
1
low cut-off frequency specified for a 1.5 MHz IF frequency becomes
Section 19.3, “Receiver Parameters.”
ref
ref
/9×1.5/2
/12×1.5/2
Example 1. Cut-off Frequency Computation
LOF0
0
0
0
1
1
1
MC33596 Data Sheet, Rev. 4
F
Frequency)
REF
16.96745
17.58140
23.74913
24.19066
24.16139
25.50261
(MHz)
(Crystal
Register”).
Frequency)
F
(MHz)
1.414
1.465
1.484
1.512
1.510
1.594
IF
(IF
Dataclk
Divider
60
60
80
80
80
80
282.791
293.023
296.864
302.383
302.017
318.783
F
(kHz)
dataclk
Divider
Digclk
Freescale Semiconductor
30
30
40
40
40
40
ref
565.582
586.047
593.728
604.767
604.035
637.565
F
and the value
(kHz)
digclk
T
1.77
1.71
1.68
1.65
1.66
1.57
(µs)
digclk