Document
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 L8312G-R16-R
Package SSOP-16
SSOP-16
Packing Tape Reel
L8312G-R16-R
(1)Packing Type (2)Package Type (3)Green Package
(1) R: Tape Reel (2) R16: SSOP-16 (3) G: Halogen Free and Lead Free
MARKING
www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 6
QW-R123-016.c
L8312
Preliminary
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PIN NAME S2A S2B S2C S2D VCC CENB2 FIN2 POL2 POL1 FIN1 CENB1 GND S1D S1C S1B S1A
Channel 2 Switch Output A Channel 2 Switch Output B Channel 2 Switch Output C Channel 2 Switch Output D Supply Voltage Pin Channel 2 Enable 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 Ground Pin Channel 1 Switch Output A Channel 1 Switch Output B Channel 1 Switch Output C Channel 1 Switch Output D
DESCRIPTION
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R123-016.c
L8312
BLOCK DIAGRAM
Preliminary
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 6
QW-R123-016.c
L8312
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING (TA=-25 ~ +85°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage Supply Current
VS
-0.6 ~ 12
V
IS 100 mA
Input Voltage (POL Pin) Power Dissipation (TA=25°C)
VIN PD
25 V 600 mW
Operating Junction Temperature Storage Temperature
TJ TSTG
-40 ~ 70 -50 ~ 85
°C °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
Supply Voltage (TOPR = -40°C ~ 80°C) Supply Current
VCC ICC
Output Voltage High Output Voltage Low
SWHIGH SWLOW
TONE/POLARITY SWITCH CHARACTERISTICS
Tone Switch Threshold
VTST
Low Frequency Rejection Polarity Detector Input Current
fRL IPOL
Polarity Detector Threshold Voltage
VTPOL
Switching Speed Enable Threshold Voltage
TS VENB
TEST CONDITIONS
Standby current, no load ISW =-5mA ISW =5mA
Coupling via 10nF(sin wave) Coupling via 10nF(sin wave) VPOL1, 2 input=25V, via RPOL=1KΩ VPOL1, 2 input applied via RPOL=1KΩ VPOL1, 2 input applied via RPOL=1KΩ ICENB =-50μA
MIN TYP MAX 59 10
VCC-1.0 VCC-0.9 VCC 0 0.3 0.5
100 170 350 1.0 7.5 100 130 200
14.0 14.5 15.0
100
0.7 1.2 1.5
UNIT V mA V
mVPP KHZ μA
V
ms V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R123-016.c
L8312
Preliminary
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
1M (Note 1)
0.1u (Note 2)
VCC
1k 10n 1k
S2A S2B S2C S2D VCC CENB2 FIN2 POL2
S1A S1B S1C S1D GND CENB1 FIN1 POL1
10n 1k 1k
0.1u(Note 3)
VPOL& Tone 4X1 Switch
0.1u(Note 3)
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
www.unisonic.com.tw
5 of 6
QW-R123-016.c
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 ampl.