X3211 [UTC]
LINEAR INTEGRATED CIRCUIT; 线性集成电路
| 型号： | X3211 |
| 厂家： | 
Unisonic Technologies |
| 描述： | LINEAR INTEGRATED CIRCUIT |
| 文件： | 总12页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTCX3211
LINEAR INTEGRATED CIRCUIT
FET BIAS CONTROLLER WITH
POLARISATION SWITCH AND TONE
DETECTION
DESCRIPTION
The UTC X3211 is designed to meet the bias requirements
of GaAs and HEMT FETs commonly used in satellite receiver
LNBs, PMR, cellular telephones etc. with a minimum of
external components.
SSOP-
20(150mil)
FEATURES
* Provides bias for GaAs and HEMT FETs
* Drives up to three FETs
* Dynamic FET protection
* Drain current set by external resistor
* Polarisation switch for LNBs –supporting zero volt gate
switching topology.
* 22kHz tone detection for band switching
APPLICATIONS
*Satellite receiver LNBs
* Private mobile radio (PMR)
* Cellular telephones
PIN CONFIGURATION
1
20
19
18
17
16
15
14
13
G1
D1
G2
D2
G3
D3
GND
CNB1
CNB2
VCC
2
RCA L
VP OL
FIN
3
4
5
N/C
6
FOUT
LOV
HB
LB
CS UB
7
8
12
11
9
10
N/C
1
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Vcc
ICC
ID
VIN
Topr
TStg
PD
VALUE
-0.6~12
100
UNIT
V
mA
mA
V
°C
°C
mW
Supply Voltage
Supply Current
Drain Current (per FET) (set by RCAL )
Input Voltage (VPOL)
Operating Temperature
Storage Temperature
0~15
25 continuous
-40~70
-50~85
500
Power Disspation(Ta=25°C)
ELECTRICAL CHARACTERISTICS
(Ta = 25 °C,Vcc=5V,ID=10mA, RCAL =33kΩUnless otherwise specified)
PARAMETER
Supply Voltage
SYMBOL
Vcc
TEST CONDITIONS
MIN
5
TYP
MAX
10
UNIT
V
Supply Current
ICC
ID1 to ID3=0
ID1 =0, ID2 to ID3=10mA,VPOL=14V
ID2=0, ID1 to ID3=10mA,VPOL=15.5V
ID1 to ID3=0,ILB=10mA
ID1 to ID3=0,IHB=10mA
6
15
35
mA
mA
mA
mA
mA
V
25
25
16
16
-3
35
25
25
-2.5
-2.4
Substrate Voltage
VSUB
(Internally generated) ISUB =0
-3.5
200
I
SUB = -200µA
V
Output Noise
Drain Voltage
Gate Voltage
Oscillator Freq
END
ENG
fO
CG=4.7nF,CD=10nF
CG=4.7nF,CD=10nF
0.02
0.005
800
Vpkpk
Vpkpk
kHz
350
GATE CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
-30
TYP
MAX
2000
UNIT
µA
Output Current Range
IGO
Output Voltage
Gate 1 Off
Low
VG1O
VG1L
VG1H
ID1=0mA, VPOL=14V, IGO1=0µA
ID1=12mA, VPOL=15.5V, IGO1=-10µA
ID1=8mA, VPOL=15.5V, IGO1=0µA
-0.05
-2.7
0.4
0
-2.4
0.75
0.05
-2
1.0
V
High
Output Voltage
Gate 2 Off
Low
VG2O
VG2L
VG2H
ID2=0mA, VPOL=15.5V, IGO2=0µA
ID2=12mA, VPOL=14V, IGO2=-10µA
ID2=8mA, VPOL=14V, IGO2=0µA
-0.05
-2.7
0.4
0
-2.4
0.75
0.05
-2
V
V
High
1.0
Output Voltage
Gate 3 Low
High
VG3L
VG3H
ID3=12mA, IGO3=-10µA
ID3=8mA, IGO3=0µA
-3.5
0.4
-2.9
0.75
-2
1.0
2
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
DRAIN CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Current
ID
8
10
12
mA
Current Change
With Vcc
ΔIDV
ΔIDT
VD1
VD2
VD3
Vcc=5 to12V
0.5
0.05
2.0
2.0
2.0
%/V
%/°C
V
V
V
With Tj
Tj= -40 to +70°C
ID1 =10mA VPOL=15.5V
ID2 =10mA VPOL=14V
ID3 =10mA
Drain 1 Change : High
Drain 2 Change : High
Drain 3 Change : High
Voltage Change
With Vcc
1.8
1.8
1.8
2.2
2.2
2.2
ΔVDV
ΔVDT
Vcc=5 to10V
Tj= -40 to +70°C
0.5
50
%/V
ppm
With Tj
Leakage Current
Drain 1
IL1
IL2
VD1=0.5V, VPOL=14V
VD2=0.5V, VPOL=15.5V
10
10
µA
Drain 2
TONE DETECTION CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Filter Amplifier
µA
RF1=150kΩ
RF1=150kΩ
VOUT=1.96V, VFIN=2.1V
f=22kHz, VIN=1mV
V(AC)IN=1V p/p sq.w6
Input Bias Current
Output Voltage 5
Output Current 5
Voltage Gain
IB
VOUT
IOUT
Gv
fR
FVT
0.02
1.75
400
0.07
1.95
520
46
0.25
2.05
650
V
µA
dB
kHz
mV p/p
Rejection Frequency
1.0
100
7.5
V Threshold 5
350
Output Stage
Lov Volt.Range
Lov Bias Current
LB Output Low
VLOV
ILOV
IL=50mA(LB or HB)
VLOV=0
-0.5
0.02
-3.5
-0.01
-0.025
2.9
Vcc-1.8
1.0
-2.5
0.01
0.025
3.1
V
µA
V
0.15
-2.75
0
VLOV=0, IL= -10µA, Enable 6
VLOV=3V, IL=0, Enable 7
VLOV=0, IL=10 mA, Disable 6
VLOV=3V, IL=50mA, Disable 7
VLOV=0, IL= -10μA, Disable 6
VLOV=3V, IL=0, Disable 7
VLOV=0, IL=10mA, Enable 6
VLOV=3V, IL=50mA, Enable 7
VLBL
VLBH
VHBL
VHBH
V
LB Output High
HB Output Low
HB Output High
0
V
V
V
V
V
V
3.0
-2.75
0
-3.5
-2.5
-0.01
-0.025
2.9
0.01
0.025
3.1
0
3.0
POLY SWITCH CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
40
15.5
100
UNIT
VPOL=25V (Applied via RPOL=10kΩ)
Input Current
IPOL
10
14
20
14.75
µA
V
ms
VPOL=25V (Applied via RPOL=10kΩ)
VPOL=25V (Applied via RPOL=10kΩ)
Threshold Voltage
Switching Speed
VTPOL
TSPOL
3
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
NOTES:
1.
The negative bias voltages specified are generated on-chip using an internal oscillator. Two external capacitors,
CNB and CsuB of 47nFare required for this purpose.
2.
The characteristics are measured using an external reference resistors RCAL of value 33kΩ wired from pins
RCAL to ground.
3.
4.
Noise voltage is not measured in production.
Noise voltage measurement is made with FETs and gate drain capacitors in place on all outputs. CG,4.7nF,are
connected between gate outputs and ground,CD,10nF,are connected between drain outputs and ground.
These parameters are linearly related to Vcc
These parameters are measured using Test Circuit 1
These parameters are measured using Test Circuit 2
5.
6.
7.
TEST CIRCUIT 1
Vcc
R2
VPOL
FIN
V1
5V DC
+
-
CF1
10K
470pF
R3
150K
Lov
GND FOUT
CNB1 RCAL
CF2
+
-
V2
68pF
CNB2 CSUB
CNB
RCAL
33K
47nF
CSUB
47nF
V2
Characteristics
AC source
Type
Frequency 22kHz
Voltage
350mV p/p enabled
100mV p/P disabled
4
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT 2
R5
Vcc
2.0K
R2
VPOL
V1
5V DC
+
CF1
10K
-
FIN
470pF
R3
150K
Lov
GND FOUT
CNB1 RCAL
CF2
+
-
V2
68pF
CNB2 CSUB
CNB
RCAL
33K
CSUB
47nF
47nF
V2
Characteristics
AC source
Type
Frequency 22kHz
Voltage
350mV p/p enabled
100mV p/P disabled
TYPICAL CHARACTERISTICS
Vsub v External Load
JFET Drain Current v Rcal
16
Note :Operation with load>200μA
Vcc =5V
is not guranteed.
-0.0
14
12
10
8
-0.5
-1.0
-1.5
Vcc =5V
Vcc =6V
6
4
-2.0
-2.5
-3.0
2
0
Vcc =8V
0.6
Vcc =10V
0.8 1.0
0
0.2
0.4
0
20
40
60
Rcal (k)
80
100
External Vsub Load (mA)
5
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
Open Loop Gain v Frequency
JFET Drain Voltage v Drain Current
70
2.2
2.1
2.0
Vcc =5V
60
50
40
Vcc =5V
Vcc =6V
30
20
10
0
Vcc =8V
Vcc =10V
1.9
1.8
100
1k
10k
100k
1M
10M
2
4
6
8
10
12
14
16
Frequency (Hz)
LB/HB Offset Voltage v Load Current
Open Loop Phase v Frequency
Vcc =5V
Vcc =5V
VLOV=0V
4
2
180
150
120
90
Tamb=70℃
0
-2
Tamb= -40℃
Tamb=25℃
60
-4
-6
30
-8
0
0
10
20
30
40
50
100
1k
10k
100k
1M
10M
Frequency (Hz)
Load Current (mA)
LB/HB Dropout Voltage v Load Current
Vcc =5V
2.0
1.9
1.8
1.7
Filter Response
1.4
1.2
Tamb= -40℃
1.0
0.8
0.6
0.4
1.6
1.5
1.4
Tamb=25℃
Tamb=70℃
0.2
0
1.3
1.2
0
10
20
30
40
50
100
1k
10k
100k
1M
Load Current (mA)
Frequency (Hz)
6
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
FUNCTIONAL DIAGRAM
-
+
Vcc
ID
+
-
DN
VD
Sense
Set
ON
+
-
I D Set
RCAL
GN
+
-
RCAL
20μA
SetS ID
CSUB
Negative
Supply
Gen.
GND
CSUB
CNB1
CNB2
CNB
FUNCTIONAL DESCRIPTION
The X3211 provides all the bias requirements for external FETs, including the generation of the negative supply
required for gate biasing, from the single supply voltage. It contains 3 such stages. The negative rail generator is
common to all devices.
The drain voltage of the external FET QN is set by the X3211 device to its normal operating voltage. This is
determined by the on board VD Set reference, the X3211 provides nominally 2 volts .
The drain current taken by the FET is monitored by the low value resistor ID Sense. The amplifier driving the gate of
the FET adjusts the gate voltage of QN so that the drain current taken matches the current called for by an external
resistor RCAL.
Since the FET is a depletion mode transistor, it is usually necessary to drive its gate negative with respect to ground
to obtain the required drain current. To provide this capability powered from a single positive supply, the device
includes a low current negative supply generator. This generator uses an internal oscillator and two external
capacitors, CNB and CSUB.
The following schematic shows the function of the Vpol input. Only one of the two external FETs numberd Q1 and
Q2 are powered at any one time, their selection is controlled by the input Vpol. This input is designed to be wired to
7
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
the power input of the LNB via a high value (10k) resistor. With th input voltage of the LNB set at or below 14V.FET
Q2 will be enabled. With the input voltage at or above 15.5V,FET Q1 will be enabled.The disabled FET has its gate
driven to 0V and its drain terminal is switched open circuit.FET number Q3 is always active regardless of the voltage
applied to Vpol.
D1
Drain
Q1
voltage&
Current
VPOL Input
G1
Enable
-
Controller
+
14.75V
Reference
20μA
VSUB
D2
Drain
Q2
voltage&
Current
G2
Enable
Controller
20μA
VSUB
D3
Drain
Q3
voltage&
Current
G3
Enable
Controller
20μA
VSUB
Control input switch function
INPUT SENSE
<= <= ≤14 volts
≥15.5 volts
POLARISATION
Vertical
SELECT
FET Q2
FET Q1
Horizontal
For many LNB application tone detection and band switching is required.The X3211 includes the circuitry necessary
to detect the presence of a 22kHz tone modulated on the supply input to the LNB.Referrring to the following
schematic diagram,the main elements of this detector are an op-amp enabling the construction of a Sallen key
filter,a rectifier/smoother and a comparator.Full control is given over the center frequency and bandwidth of the filter
8
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
by the selection of two external resistors and capacitors (one of these resistors,R2, shares the functionof overvoltge
protection of pin Vpol ).
LOV
Input
-
LB
Output
+
Enable
VSUB
DETECTOR
COMPARATOR
FILTER
CF2
FOUT
-
HB
+
Output
68pF
CF1
Enable
R3
LNB input
150k
R2
D1
C1
-
-
FIN
+
10k
VSUB
470pF
+
REF2
REF1
OUTPUT DRIVERS
APPLICATION CIRCUIT
*L1
C2
Q1
*C2
10nF
*L2
Vcc
GN
DN
HB
VPOL
FIN
*C3
CG
4.7nF
LB
LOV
*Stripline
Elements
FOUT
GND
CNB1 RCAL
CNB2 CSUB
CNB
47nF
CSUB
47nF
RCAL
33K
9
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
APPLICATIONS INFORMATION
The device is a partial application circuit for the X3211 showing all external components required for appropriate
biasing. The bias circuits are unconditionally stable over the full temperature range with the associated FETs and
gate drain capacitors in circuit.
Capacitors CD and CG ensure that residual power supply and substrate generator noise is not allowed to affect
other external circuits which may be sensitive to RF interference. They also serve to suppress any potential RF
feedthrough between stages via the X3211. These capacitor are required for all stages used Values of 10nF and
4.7nF respectively are recommended however this is design dependent and any value between 1nFand 100nF
could be used.
The capacitors CNB and CSUB are an integral part of the X3211 negative supply generator. The negative bias
voltage is generated on-chip using an internal oscillator. The required value of capacitors CNB and CsuB is 47nF.
This generator produces a low current supply of approximately –3 volts. Although this generator is intended purely to
bias the external FETs, it can be used to power other external circuits via the CsUB pin.
Resistors RcAL sets the drain current at which all external FETs are operated. If any bias control circuit is not
required, its related drain and gate connections may be left open circuit without affecting the operation of the
remaining bias circuits.
The X3211 has been designed to protect the external FETs from adverse operating conditions. With a JFET
connected to any bias circuit, the gate output voltage of the bias circuit can not exceed the range –3.5V to 1V,under
any conditions including power up and powerdown transients. Should the negative bias generator be shorted or
overloaded so that the drain current of the external FETs can no longer be controlled, the drain supply to FETs is
shut down to avoid damage to the FETs by excessive drain current.
Tone detection and band switching is provided on the X3211. The following diagrams describes how this feature
operates in an LNB and the external components required. The presence or absence of a 22kHz tone applied to pin
FIN enables one of two outputs, LB and HB.A tone present enables HB and tone absent enables LB. The LB and HB
outputs are designed to be compatible with both MMIC and discrete local oscillator applications, selected by pin LOV.
Referring to Figure 1 wiring pin LOV to ground will force LB and HB to switch between –2.6V (disabled) and 0V
(enabled).Referring to Figure 2 wiring pin LOV to a positive voltage source (e.g. a potential divider across Vcc and
ground set to the required oscillator supply,Vosc when enabled.
Tone Detection Function
FIN
LB
HB
LB
HB
LOV
22kHz
Disabled
Enabled
-2.6 volts
GND
GND
GND
-
22kHz
-
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
GND
Note 1
Vosc
-2.6 volts
Vosc
Note 1
Note 1: 0 volts in typical LNB applications but dependent on external circuits.
10
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
APPLICATIONS INFORMATION (cont)
Vcc
LNB Downfeed
R2
CF1
10k
X3211
470pF
R3
150k
1
G1
Vcc
RCAL
VPOL
FIN
R1
33k
D1
CF2
G2
D2
G3
68pF
N/C
FOUT
LOV
Vcc
D3
GND
R4
G2
HB
CNB1
Local
Osc.
MMIC
CHB
CNB2 LB
10
R5
CSUB
100nF
N/C
CNB
G1
47nF
CUB
10
47nF
CLB
100nF
Figure 1 Lov grounded
Vcc
LNB Downfeed
R2
CF1
10k
X3211
470pF
1
R3
G1
Vcc
RCAL
VPOL
FIN
R1
33k
150k
D1
CF2
G2
D2
G3
68pF
N/C
FOUT
LOV
D3
GND
10.6GHz Local Osc
R4
10
HB
CNB1
CNB2 LB
CSUB
N/C
R5
10
9.75GHz Local Osc
CNB
CHB
47nF
CUB
R7
3k
100nF
R9
47nF
CLB
R8
100nF
Figure 2 Lov connected to Vosc
11
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
UTCX3211
LINEAR INTEGRATED CIRCUIT
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.
12
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R122-004,C
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