L8312 [UTC]
DUAL POLARIZATION AND TONE SWITCH CONTROLLER; 双极化及音开关控制器
| 型号： | L8312 |
| 厂家： | 
Unisonic Technologies |
| 描述： | DUAL POLARIZATION AND TONE SWITCH CONTROLLER |
| 文件： | 总6页 (文件大小：159K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
DUAL POLARIZATION AND
TONE SWITCH CONTROLLER
DESCRIPTION
The UTC L8312 is specially designed integrated circuit for
control satellite receiver front-end block switch and provides
customers with dual independent channel of two-control signal:
polarization and tone switch controller for LNB switch signal path
selection.
The UTC L8312 is characterized by its two independent
channels and each provides logical outputs to show status of LNB
switch polarization selection and 22 KHz tone signal.
Minimum number of external discrete components and the wide
range of supply voltage make this device suitable in Twin, Quad and
multiple feed universal LNB switch to get lower cost and minimum
PCB size.
In order to satisfy the special LNB switch model, a tighter
specification has been taken into consideration for the polarization
switch characteristics. The number of external components is also
reduced. The UTC L8312 includes separate 22K tone detection for
each channel. In addition, the built-in tone amplifier circuit is
designed to protect transient signal by an external resistor and
capacitor simply, and it also provides good bandwidth and
sensitivity.
The UTC L8312 is generally applied in multi output LNB and
multi switch.
FEATURES
* Direct Drive PIN Diode and Multiplexer IC.
* High Supply Voltage
ORDERING INFORMATION
Ordering Number
Package
SSOP-16
Packing
Lead Free
Halogen Free
L8312G-R16-R
L8312L-R16-R
Tape Reel
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
1 of 6
QW-R123-016.a
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
PIN NAME
S2A
DESCRIPTION
1
2
Channel 2 Switch Output A
Channel 2 Switch Output B
Channel 2 Switch Output C
Channel 2 Switch Output D
Supply Voltage Pin
S2B
3
S2C
4
S2D
5
VCC
6
CENB
2
Channel 2 Enable
7
FIN2
Channel 2 22KHz Tone Input Pin
Channel 2 Polarization Input Pin
Channel 1 Polarization Input Pin
Channel 1 22KHz Tone Input Pin
Channel 1 Enable
8
POL
POL
2
9
1
10
11
12
13
14
15
16
FIN1
CENB
GND
S1D
S1C
S1B
S1A
1
Ground Pin
Channel 1 Switch Output A
Channel 1 Switch Output B
Channel 1 Switch Output C
Channel 1 Switch Output D
UNISONIC TECHNOLOGIES CO., LTD
2 of 6
QW-R123-016.a
www.unisonic.com.tw
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
3 of 6
QW-R123-016.a
www.unisonic.com.tw
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=-25 ~ +85°C)
PARAMETER
SYMBOL
RATINGS
-0.6 ~ 12
100
UNIT
V
Supply Voltage
Supply Current
VS
IS
mA
V
Input Voltage (POL Pin)
VIN
PD
25
Power Dissipation (TA=25°C)
Operating Junction Temperature
Storage Temperature
600
mW
°C
TJ
-40 ~ 70
-50 ~ 85
TSTG
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (VCC=5V, TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VCC
TEST CONDITIONS
MIN TYP MAX UNIT
Supply Voltage (TOPR = -40°C ~ 80°C)
Supply Current
7
9
V
mA
V
ICC
Standby current, no load
10
Output Voltage High
SWHIGH ISW =-5mA
SWLOW ISW =5mA
VCC
0.5
VCC-1.0 VCC-0.9
Output Voltage Low
0
0.3
TONE/POLARITY SWITCH CHARACTERISTICS
Tone Switch Threshold
VTST
fRL
Coupling via 10nF(sin wave)
Coupling via 10nF(sin wave)
100
1.0
170
7.5
350 mVPP
KHZ
Low Frequency Rejection
Polarity Detector Input Current
IPOL
VPOL1, 2 input=25V, via RPOL=1KΩ 100
POL1, 2 input applied via
POL=1KΩ
POL1, 2 input applied via
POL=1KΩ
ICENB =-50μA
130
200
μA
V
R
Polarity Detector Threshold Voltage
VTPOL
14.0 14.5 15.0
100
V
V
R
Switching Speed
TS
ms
V
Enable Threshold Voltage
VENB
0.7
1.2
1.5
UNISONIC TECHNOLOGIES CO., LTD
4 of 6
QW-R123-016.a
www.unisonic.com.tw
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
S2A
S2B
S1A
1M
(Note 1)
S1B
S1C
S1D
GND
0.1u
(Note 2)
S2C
S2D
VCC
VCC
CENB
FIN2
2
CENB
1
10n
10n
1k
1k
1k
1k
FIN1
POL
1
POL
2
0.1u(Note 3)
0.1u(Note 3)
VPOL& Tone 4X1 Switch
Note:1. Current limitation resistance
2. Required BYPASS capacitor for noise interference elimination
3. Optional BYPASS capacitor for 22KHz tone interference elimination
UNISONIC TECHNOLOGIES CO., LTD
5 of 6
QW-R123-016.a
www.unisonic.com.tw
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
FUNCTIONAL INFORMATION
The UTC L8312 is specially designed integrated circuit for control satellite receiver front-end block switch, it
contains all the circuits necessary to detect the DC voltage and 22KHz signal on the supply input to the LNB switch.
The tone switch circuit incorporates an operational amplifier used as active filter, a rectifier /a comparator and an
output driver. Built-in feedback resistor included in operational amplifier, external component counts are thus
minimized. Therefore, low pass filter response can be achieved with a simple external RC.
The gain of operational amplifier must be adjusted with different supply voltage due to the threshold of
comparator is supply dependent. To optimize the system performance, the external RC values must be adjusted.
The resistor also provides maximum input voltage protection for the POL1, 2 pins. The low pass filter of tone
detection circuit allows the UTC L8312 to reliably detect tone signal. Each channel decodes tone polarization signals
to activate one of four outputs. Each of those outputs has the capability of sinking 5mA and sourcing 5mA, providing
the capability of driving directly signal routing pin diodes.
In addition, the channel outputs would activate when pins voltage of CENB1, 2 set high, which means, CENB1, 2
pins input signal have priority over tone polarization signals to control channel outputs.
Table 1 shows the logical output truth table.
Table1
C
ENB1
Tone
VPOL
S1A
Low
Low
High
Low
Low
Low
S1B
Low
Low
Low
High
Low
Low
S1C
Low
Low
Low
Low
High
Low
S1D
Low
Low
Low
Low
Low
High
≤0.7V
≥1.2V
≥1.2V
≥1.2V
≥1.2V
≥1.2V
<9.5V
≤14V
Off
Off
On
On
≥15.5V
≤14V
≥15.5V
CENB
2
Tone
VPOL
S2A
Low
Low
High
Low
Low
Low
S2B
Low
Low
Low
High
Low
Low
S2C
Low
Low
Low
Low
High
Low
S2D
Low
Low
Low
Low
Low
High
≤0.7V
≥1.2V
≥1.2V
≥1.2V
≥1.2V
≥1.2V
<9.5V
≤14V
Off
Off
On
On
≥15.5V
≤14V
≥15.5V
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
6 of 6
QW-R123-016.a
www.unisonic.com.tw
相关型号：
©2020 ICPDF网 联系我们和版权申明