PLL with I2C Bus for AM/FM Receivers |
SDA 4331X |
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Overview |
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1.1 |
Features |
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• 155 MHz FM and 40 MHz AM input frequency |
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• 30 mVeff AM and 50 mVeff FM sensitivity |
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• Additional open drain ports controlled by I2C Bus |
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• 2-pin quartz oscillator |
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Fast phase detector with short anti-backlash pulses |
P-DSO-24-1 |
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and polarity reversal |
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•Charge pump current programmable in four steps up to 4.5 mA
•Frequency resolution of 1, 5 and 10 kHz AM and 12.5, 25 and 50 kHz FM
•P-DSO-24 package
Type |
Ordering Code |
Package |
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SDA 4331X |
Q67100-H5139 |
P-DSO-24-1 |
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1.2Application
The SDA 4331X provides separated input and output ports for AM and FM and is well suited for extremely fast loop settling times in the FM mode.
Semiconductor Group |
1 |
04.96 |
SDA 4331X
1.3Pin Configuration
(top view)
P-DSO-24-1
Figure 1
Semiconductor Group |
2 |
04.96 |
SDA 4331X
1.4Pin Definitions and Functions
Pin No. |
Symbol |
Input (I) |
Function |
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Output (O) |
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1 |
VDD1 |
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Supply voltage digital (5 V) |
2 |
SCL |
I |
Clock I2C Bus |
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3 |
SDA |
I/O |
Data I2C Bus |
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4 |
A0 |
I |
Address selection, sets the LSB of the IC-address |
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5 |
N.C. |
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6 … 9 |
SA1 … SA4 |
O |
10 V open drain output, controlled via I2C Bus |
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10 |
AM/FM |
O |
10 V open drain output, indicating the operation |
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mode (H = AM) |
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11 |
FMIN |
I |
Input for the FM signal from VCO |
12 |
GNDAN |
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Ground analog |
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13 |
AMIN |
I |
Input for the AM signal from VCO |
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14 |
N.C. |
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15 |
N.C. |
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16 |
IREF |
I |
Reference current, setting the base current level |
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for the charge pumps |
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17 |
PDFM |
O |
FM charge pump output |
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18 |
PDAM |
O |
AM charge pump output |
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19 |
PDFMA |
O |
Source follower output FM |
20 |
PDAMA |
O |
Source follower output AM |
21 |
VDD2 |
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Supply voltage digital for charge pump and source |
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followers (up to 10 V) |
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22 |
OSCFB |
I/O |
Oscillator feedback, quartz terminal |
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23 |
OSCIN |
I |
Oscillator input, quartz terminal, optionally input |
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for external reference |
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24 |
GND |
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Ground digital |
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Semiconductor Group |
3 |
04.96 |
SDA 4331X
1.5Functional Block Diagram
Figure 2
Block Diagram
Semiconductor Group |
4 |
04.96 |
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