Siemens SDA4331X Datasheet
PLL with I2C Bus for AM/FM Receivers SDA 4331X
1 Overview
1.1 Features
• 155 MHz FM and 40 MHz AM input frequency
• 30 mVeff AM and 50 mVeff FM sensitivity
2
• Additional open drain ports controlled by I
• 2-pin quartz oscillator
• Fast phase detector with short anti-backlash pulses
and polarity reversal
• 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
C Bus
P-DSO-24-1
Type Ordering Code Package
SDA 4331X Q67100-H5139 P-DSO-24-1
1.2 Application
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
1.3 Pin Configuration
(top view)
SDA 4331X
P-DSO-24-1
Figure 1
Semiconductor Group 2 04.96
1.4 Pin Definitions and Functions
SDA 4331X
Pin No. Symbol Input (I)
Function
Output (O)
1 V
DD1
2 SCL I Clock I
3 SDA I/O Data I
Supply voltage digital (5 V)
2
C Bus
2
C Bus
4 A0 I Address selection, sets the LSB of the IC-address
5 N.C.
6 … 9 SA1 … SA4 O 10 V open drain output, controlled via I
2
C Bus
10 AM/FM O 10 V open drain output, indicating the operation
mode (H = AM)
11 FM
IN
12 GND
13 AM
IN
AN
I Input for the FM signal from VCO
Ground analog
I Input for the AM signal from VCO
14 N.C.
15 N.C.
16
I
REF
I Reference current, setting the base current level
for the charge pumps
17 PD
18 PD
19 PD
20 PD
21
V
DD2
FM
AM
FMA
AMA
O FM charge pump output
O AM charge pump output
O Source follower output FM
O Source follower output AM
Supply voltage digital for charge pump and source
followers (up to 10 V)
22 OSC
23 OSC
FB
IN
I/O Oscillator feedback, quartz terminal
I Oscillator input, quartz terminal, optionally input
for external reference
24 GND Ground digital
Semiconductor Group 3 04.96
1.5 Functional Block Diagram
SDA 4331X
Figure 2
Block Diagram
Semiconductor Group 4 04.96
Loading...