TA1375FG
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA1375FG
Single Conversion Tuner for Digital TV / CATV
The TA1375FG is a tuner IC for for Digital TV and CATV applications
that integrates a PLL block and mixer, oscillator, IF amplifier and IF
GCA on a single chip.
This oscillator and PLL circuits are low phase noise.
The control data of the PLL block conforms to I²C-bus formats.
Small flat package : LQFP48(0.5mm pitch)
LQFP48-P-0707-0.5
Features
Vcc: 5V（typ.）
Weight: 0.17g (typ.)
Two-band mixer
Three-band oscillator
Low phase noise oscillator circuit
Built-In IF GCA circuit
IF output driver
GCA block: Gain changeover switch (3dB shift possible)
Direct 2 modulus type frequency synthesizer
I²C bus format control
33V high voltage tuning amplifier built-in
Four-bit bandswitch drive transistor
Frequency step : 50kHz, 62.5kHz, 142.86kHz, 166.67kHz (when a 4MHz crystal is used.)
Four-programmable chip address
Power-on reset circuit
Package: Pb-free
Power on reset status
Frequency step : [62.5kHz]
Charge pump current: [Low]
Counter data: ALL [ 0 ]
Band driver: [OFF]
Tuning amplifier: [OFF] (charge pump is sink mode)
Local oscillator and mixer: ALL [OFF]
note1: These devices are easy to be damaged by high voltage or electric fields. In regards to this, please handle with care.
note2: Install the product correctly. Otherwise, it may result in break down, damage and/or degration to the product or
equipment.
2005/05/23
1
TA1375FG
Block Diagram
VHF-H OSC-C2
VHF-H OSC-B1
VHF-H OSC-C1
VHF-L OSC-C
36
Vcc4 (OSC)
IF output
GND5 (IF AMP)
Vcc5 (IF)
GND6 (IF DRIVER)
GND7 (GCA)
IF input1
IF input2
Vcc6 (GCA)
GND8 (AMP)
Gain SW (GCA)
N.C.
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
GND3 (Mix)
UHF RF input2
UHF RF input1
UHF PORT
VHF RF input2
VHF RF input1
Vt output
NF
Vcc3 (MIX)
VHF-H PORT
VHF-L PORT
FMT PORT
37
38
39
40
41
42
43
44
45
46
47
48
1
IF output1
GCA
control
Lock
Detector
Band
Switch
Power on
Reset
VHF-L OSC-B
UHF OSC-B2
UHF OSC-E2
UHF OSC-E1
UHF OSC-B1
GND4 (OSC)
MIX output2
MIX output1
Programmable
Divider
Charege
Pump
Phase
Comparator
Reference
Divider
19
18
17
16
Band
Driver
15
14
I2C bus
Interface
13
8
Vcc1 (PLL)
2
IF output2
3
GCA control
4
GND1 (PLL)
5
SDA in/output
6
SCL input
7
ADR set
9
GND2 (PLL)
10
X'tal 1
11
X'tal 2
12
Vcc2 (BAND)
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory
purpose.
2005/05/23
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TA1375FG
Terminal Name
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin name
IF output 1
IF output 2
GCA control terminal
GND 1 (PLL)
SDA In/out
SCL In
ADR set (address setting)
Vcc 1 (PLL)
GND 2 (PLL)
Crystal 1
Crystal 2
Vcc 2 (BAND)
FMT port (NPN-Tr)
VHF-L port (NPN-Tr)
VHF-H port (NPN-Tr)
Vcc 3 (MIX)
NF
Vt output
VHF RF Input 1
VHF RF Input 2
UHF port (NPN-Tr)
UHF RF Input 1
UHF RF Input 2
GND 3 (MIX)
VHF-L OSC-base
VHF-L OSC-collector
UHF OSC-base1
UHF OSC-emitter1
UHF OSC-emitter2
UHF OSC-base2
VHF-H OSC-collector1
VHF-H OSC-collector2
VHF-H OSC-base1
GND 4 (OSC)
MIX output 1
MIX output 2
Vcc 4 (OSC)
IF out
GND 5 (IF AMP)
Vcc 5 (IF)
GND 6 (IF DRIVER)
GND 7 (GCA)
IF Input 1
IF Input 2
Vcc 6 (GCA)
GND 8 (AMP)
Gain SW（GCA）
（Open:
typical / GND:＋3dB gain up）
N.C.
（This
pin does not connect the Inside circuit.）
2005/05/23
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TA1375FG
Terminal Function
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purpose.
Pin No.
Pin Name.
Function
Interface
Vcc
1
IF output
2
IF output pin for the GCA block.
Symmetrical output type.
1
2
GND
Vcc
Gain control pin of GCA block.
3
GCA control
The gain of GCA block Is controllable
by the voltage given to this pin.
160kΩ
40kΩ
3
GND
4
GND1
This Is the ground pin for the PLL
circuit.
⎯
Vcc
5
SDA
Serial data Input and output pin
5
22Ω
1kΩ
70kΩ
GND
Vcc
6
SCL
Serial clock Input pin
6
1kΩ
GND
2005/05/23
4
TA1375FG
Pin No.
Pin Name.
Function
Interface
Vcc
150kΩ
100kΩ
1kΩ
Address setting pin
7
ADR set
The address of the PLL block Is set
up using the voltage applied to this
pin.
7
100Ω
50kΩ
GND
8
9
Vcc1
GND2
This Is power supply for the PLL
circuit.
This Is the ground pin for the PLL
circuit.
⎯
⎯
Vcc
10
11
Crystal oscillator input pins.
Crystal
A 4MHz crystal is used.
10
11
50kΩ
GND
12
Vcc2
This Is power supply for the Band
circuit.
⎯
Vcc
13
14
15
21
Band driver
Output port
The output port of the band block can
be set up using the control data.
Bear in mind that drive current differs
according to each band drive port.
DATA
I/F
13
14
15
21
GND
16
Vcc3
This Is power supply for the Mixer
circuit.
⎯
Vcc
17
NF
Be sure to connect a resistance (of
about 33kΩ) between pin18 and the
33V external power supply for tuning.
To prevent abnormal oscillation,
connect between pin18 and GND a
capacity element that does not affect
a PLL.
18
Vt output
18
50Ω
50Ω
GND
17
Vcc
2005/05/23
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