TA1322FN
Preliminary
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA1322FN
Down-Converter IC with PLL for Satellite Tuner
The TA1322FN is a wideband down-converter which can
operate at input frequency ranging from 850 MHz to 2200 MHz.
Intended primarily for use in satellite tuners, this IC includes an
oscillator, a mixer, an IF amplifier and a PLL.
The I
2
C bus data format is used as the data control format.
The supply voltage of 5.0 V helps minimize the tuner’s power
dissipation, while the compact 30-pin SSOP package allows the
tuner to be kept small.
Features
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Supply voltage: 5.0 V (typ.)
Wide input frequency range
Low phase noise oscillator
Standard I
2
C bus format control
4-MHz (X’tal) buffer output pin
Reference oscillator input change-over switch [X’tal or external input]
33-V high-voltage tuning amplifier built-in
Built-in comparator (P4, P5, P7)
Bandswitch drive transistor (P0) [IBD = 40 mA (max)]
Selected IF output port
Frequency step: 62.5 kHz or 125 kHz (for 4-MHz X’tal)
4-address setting via address selector
Power-on reset circuit
×1/2 prescaler
Flat compact package: SSOP30-P-300-0.65 (0.65-mm pitch)
Weight: 0.17 g (typ.)
Power-On Reset Operation Conditions
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Frequency step: 125 kHz
Charge pump output current: ±50 µA
Counter data: all [0]
Band driver: OFF
Tuning amplifier: OFF
IF output operation: pin 19 is ON
Note 1: This device can easily be damaged by high voltages or electrical fields. For this reason, please handle it
with care.
1
2002-02-12
TA1322FN
Block Diagram
SDA in/out
16
15
SCL in
ADR set
XO SW
30
29
28
27
26
25
24
23
22
21
20
19
18
17
XO-SW
IF-SW
Address
Band
Driver
2
Programmable
Counter
1/2
1/32
1/33
Divider
I C BUS
Data Interface
Phase
Comparator
Comparator
1
GND1
2
V
CC
1
3
OSC-E
4
OSC-B
5
GND2
6
Vt-out
7
NF
8
X’tal
9
V
CC
2
10
XO buff out
11
GND3
12
P4
13
P5
14
P7
2
PO out
IF out2
IF out1
RF in2
RF in1
GND7
GND6
GND5
GND4
TEST
V
CC
4
V
CC
3
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TA1322FN
Pin Functions
Pin No.
1
2
Pin Name
GND1
V
CC
1
Function
Ground pin for oscillator circuit block
Power supply pin for local oscillator
circuit block
2
Interface
¾
3
Oscillator
4
Local oscillator circuit
4
3
GND1
5
GND2
Ground pin for oscillator circuit block
V
CC
2
6
Vt Output
6
Tuning voltage output pin with built-in
tuning amplifier
GND3
7
NF
7
V
CC
2
V
CC
2
1 kW
5 kW
5 kW
5 kW
5 kW
50
W
¾
Crystal oscillator input
Reference Input
8
(4-MHz input)
Can be switched between X’tal
oscillator and external input using pin
24 (XO switch).
8
1 kW
GND3
9
V
CC
2
Power supply pin for PLL circuit block
V
CC
2
¾
10
Reference signal
buffer output
Buffer output pin for reference signal
10
GND3
11
GND3
Ground pin for PLL circuit block
¾
3
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TA1322FN
Pin No.
Pin Name
Function
Interface
12
P4
Output can be controlled by setting
the band switch data.
The circuit configuration is open
collector output.
Each pin has a built-in comparator.
The status of the comparator can be
checked READ mode.
CMOP
12, 13, 14
13
P5
GND3
14
P7
V
CC
2
15
SCL Input
Input pin for I C bus serial clock data
2
15
1 kW
100
W
GND3
V
CC
2
SDA
16
Input/Output
Input/output pin for I C bus serial
clock data
2
16
20
W
1 kW
100
W
100
W
12 kW
GND3
17
PO output
Output can be controlled by setting
band switch data.
17
DATA I/F
GND3
V
CC
2
150 kW
18
100
W
1 kW
50 kW
GND3
18
ADR Set
The address for hardware bit setting
can be selected by applying voltage to
this pin.
4 programmable address can be
programmed.
12 kW
V
CC
2
70 kW
4
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TA1322FN
Pin No.
Pin Name
IF output pin.
19
IF Output 1
Output can be controlled by setting
the band switch data (P6).
IF output impedance is 75
W
each
other.
When P6 data set 0, output pin is Pin
19 (IF output 1).
When P6 data set 1, output pin is Pin
21 (IF output 2).
20
22
23
GND4
V
CC
3
GND5
Ground pin for IF amplifier circuit
block
Power supply pin for IF amplifier
circuit block
Ground pin for IF amplifier circuit
block
V
CC
2
25 kW
Determines reference signal input.
24
XO Switch
If connected to ground:
X’tal oscillator.
If open or connected to V
CC
2:
external input
GND3
24
1 kW
¾
¾
¾
GND4, 5
19, 21
Function
Interface
V
CC
3
21
IF Output 2
V
CC
2
25
TEST
This pin can be used at open.
GND3
¾
26
GND6
Ground pin for mixer circuit block
27
RF Input1
RF signal input pin
Input can be either balanced or
unbalanced.
27
3 kW
3 kW
100 kW
When test mode set, this pin can
confirm X’tal divider signal and 1/2
counter signal.
25 kW
25
25 kW
28
28
RF Input2
GND7
29
30
GND7
V
CC
4
Ground pin for mixer circuit block
Power supply pin for mixer circuit
block
¾
¾
5
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