SN761662 [TI]
DTV TUNER IC; 数字电视调谐器IC
| 型号： | SN761662 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DTV TUNER IC |
| 文件： | 总20页 (文件大小：943K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
FEATURES
DBT PACKAGE
(TOP VIEW)
•
•
•
Low-Phase-Noise Mixer/Oscillator and PLL
Synthesizer
1
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
VLO OSC B
VLO OSC C
OSC GND
VHI OSC B
VHI OSC C
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
UHF RF IN2
UHF RF IN1
VHI RF IN
VLO RF IN
BS4
VHF-L, VHF-H, UHF Three-Band Local
Oscillator
I2C Bus Protocol (Bidirectional Data
2
3
4
Transmission)
5
•
•
•
•
•
•
30-V Tuning Voltage Output
Four NPN-Type Band-Switch Drivers
One Auxiliary-Port, Five-Level ADC
RF AGC Detector Circuit
6
RF GND
MIXOUT2
MIXOUT1
NC
7
8
9
10
11
12
13
14
15
16
17
18
19
BUS GND
RF AGC
AGC FIL2
AGC FIL1
BS3
Crystal Oscillator Output
IF OUT1
Programmable Reference Divider Ratio
(24/28/50/64/80/128)
IF OUT2
VCC
•
•
•
Standby Mode
CP
5-V Power Supply
38-Pin TSSOP Package
VTU
BS2
P5/ADC
BS1
XTAL1
SDA
APPLICATIONS
XTAL2
SCL
•
•
•
Digital TV
Digital CATV
Set-Top Box
XTALOUT
AS
P0034-02
DESCRIPTION
The SN761662 is a low-phase-noise synthesized
tuner IC designed for digital TV tuning systems. The
circuit consists of a PLL synthesizer, three-band local
oscillator and mixer, 30-V output tuning amplifier, four
NPN band-switch drivers, and is available in a
small-outline package.
A
15-bit programmable
counter and reference divider are controlled by I2C
bus protocol. Tuning step frequency is selectable by
this reference divider ratio for a crystal oscillator.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright © 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated
circuits be handled with appropriate precautions. Failure to observe proper handling and installation
procedures can cause damage.
MIXOUT1 and MIXOUT2 (pins 31 and 32) withstand 1.5 kV, and all other pins withstand 2 kV, according
to the human body model (1.5 kΩ, 100 pF).
Functional Block Diagram
IF
Amp
VHF-L
Osc
VHF-H
Osc
UHF
Osc
IF OUT1
IF OUT2
AGC FIL1
RF
AGC
VHF-L
Mixer
VHF-H
Mixer
UHF
Mixer
Detect
VLO RF IN
AGC FIL2
RF AGC
VHI RF IN
UHF RF IN1
UHF RF IN2
VCC
N.C.
CP
Programmable
Divider
VTU
RF GND
Op
Amp
XTAL1
XTAL
Osc
128/80/64/50/
Phase
Detector
Charge
Pump
28/24 Div
XTAL2
XTAL OUT
NPN Band Switch Port
2
SCL
I C Bus
Interface
SDA
AS
5-Level
ADC
BUS GND
B0089-01
2
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
Pin Assignments
Pin Description
DESCRIPTION
TERMINAL
NAME
AGC FIL1
SCHEMATIC
NO.
26
27
20
23
24
25
34
29
14
10
11
12
31
32
30
3
Additional peak-hold capacitor pin
Figure 1
Figure 1
Figure 2
Figure 3
Figure 3
Figure 3
Figure 3
AGC FIL2
AS
RF AGC LPF capacitor pin
Address selection input
Band-switch1 output
Band-switch2 output
Band-switch3 output
Band-switch4 output
Serial bus/band-switch ground
Charge pump output
IF ground
BS1
BS2
BS3
BS4
BUS GND
CP
Figure 4
IF GND
IF OUT1
IF OUT2
MIX OUT1
MIX OUT2
N.C.
IF amplifier output
Figure 5
Figure 5
Figure 6
Figure 6
IF amplifier output
Mixer output
Mixer output
No connection
OSC GND
P5/ADC
RF AGC
RF GND
SCL
Oscillator ground
16
28
33
21
22
6
Port 5 output/ADC input
RF AGC output
Figure 7
Figure 8
RF ground
Serial clock input
Figure 9
SDA
Serial data input/output
UHF oscillator base1
UHF oscillator base2
UHF oscillator collector1
UHF oscillator collector2
UHF RF input
Figure 10
Figure 11
Figure 11
Figure 11
Figure 11
Figure 12
Figure 12
UHF OSC B1
UHF OSC B2
UHF OSC C1
UHF OSC C2
UHF RFIN1
UHF RFIN2
VCC
9
7
8
37
38
13
4
UHF RF input
Supply voltage for mixer/oscillator/PLL: 5 V
VHF HIGH oscillator base
VHF HIGH oscillator collector
VHF-H RF input
VHI OSC B
VHI OSC C
VHI RFIN
VLO OSC B
VLO OSC C
VLO RFIN
VTU
Figure 13
Figure 13
Figure 14
Figure 15
Figure 15
Figure 18
Figure 4
5
36
1
VHF LOW oscillator base
VHF LOW oscillator collector
VHF-L RF input
2
35
15
17
18
19
Tuning voltage amplifier output
4-MHz crystal oscillator output
4-MHz crystal oscillator input
4-MHz oscillator output
XTAL1
Figure 16
Figure 16
Figure 17
XTAL2
XTALOUT
3
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
27
30 W
3 kW
25 W
25 kW
20
26
20 pF
S0136-01
S0139-01
Figure 1.
Figure 2.
15
23
24
25
34
10 W
14
50 kW
S0138-01
S0132-01
Figure 3.
Figure 4.
31 32
20 W
25 W
25 W
11
12
25 W
25 W
S0131-01
S0141-01
Figure 5.
Figure 6.
4
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
55 W
25 W
1 kW
28
16
S0140-01
S0133-01
Figure 7.
Figure 8.
1 kW
25 W
1 kW
21
22
S0136-02
S0137-01
Figure 9.
Figure 10.
37
38
8
7
9
6
3 kW
3 kW
S0142-03
S0130-01
Figure 11.
Figure 12.
5
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
4
36
3 kW
5
3 kW
3 kW
S0142-02
S0129-02
Figure 13.
Figure 14.
18
17
1
20 W
10 W
2
3 kW
3 kW
50 kW
S0134-01
S0129-01
Figure 15.
Figure 16.
35
3 kW
25 W
19
S0142-01
S0135-01
Figure 17.
Figure 18.
6
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
(2)
Supply voltage, VCC
Input voltage 1, VGND
VCC
–0.4 V to 6.5 V
–0.4 V to 0.4 V
–0.4 V to 35 V
–0.4 V to 6.5 V
1276 mW
(2)
(2)
RF GND, OSC GND, BUS GND
Input voltage 2, VVTU
VTU
(2)
Input voltage 3, VIN
Continuous total dissipation, PD
Other pins
(3)
TA ≤ 25°C
Operating free-air temperature, TA
Storage temperature range, Tstg
Maximum junction temperature, TJ
Maximum short-circuit time, tSC(max)
–20°C to 85°C
–65°C to 150°C
150°C
Each pin to VCC or to GND
10 s
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Voltage values are with respect to the IF GND of the circuit.
(3) Derating factor is 10.2 mW/°C for TA ≥ 25°C.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
5
MAX
5.5
33
UNIT
V
Supply voltage, VCC
4.5
Tuning supply voltage, VTU
Output current of band switch, IBS
Output current of port 5, IP5
Operating free-air temperature, TA
30
V
One band switch on
10
mA
mA
°C
–5
–20
85
7
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
ELECTRICAL CHARACTERISTICS, Total Device and Serial Interface
VCC = 4.5 V to 5.5 V, TA = –20°C to 85°C, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
75
87
8
MAX
UNIT
mA
mA
mA
V
ICC
1
2
Supply current 1
ICC
Supply current 2
One band switch on (IBS = 10 mA)
STBY = 1
ICC-STBY
VIH
Standby supply current
High-level input voltage (SCL, SDA)
Low-level input voltage (SCL, SDA)
High-level input current (SCL, SDA)
Low-level input current (SCL, SDA)
2.3
VIL
1.35
10
V
IIH
µA
µA
IIL
–10
2.1
Power-on-reset supply voltage
(threshold of supply voltage between
reset and operation mode)
VPOR
2.8
3.5
V
I2C INTERFACE
Address-select high-input voltage
(AS)
VASH
VASM1
VASM2
VASL
IASH
VCC = 5 V
VCC = 5 V
VCC = 5 V
VCC = 5 V
4.5
2
5
3
V
V
Address-select mid-input1 voltage
(AS)
Address-select mid-input2 voltage
(AS)
1
1.5
0.5
10
V
Address-select low-input voltage
(AS)
V
Address-select high-input current
(AS)
µA
µA
Address-select low-input current
(AS)
IASL
–10
0
VADC
IADH
IADL
VOL
ADC input voltage
See Table 10
VADC = VCC
VCC
10
V
µA
µA
V
ADC high-level input current
ADC low-level input current
Low-level output voltage (SDA)
VADC = 0 V
–10
VCC = 5 V, IOL = 3 mA
0.4
10
High-level output leakage current
(SDA)
lSDAH
VSDA = 5.5 V
µA
fSCL
Clock frequency (SCL)
Data hold time
100
400
kHz
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
tHD-DAT
tBUF
tHD-STA
tLOW
See timing chart, Figure 19
0
1.3
0.6
0.6
0.6
0.6
0.1
Bus free time
Start hold time
SCL-low hold time
SCL-high hold time
Start setup time
Data setup time
SCL, SDA rise time
SCL, SDA fall time
Stop setup time
tHIGH
tSU-STA
tSU-DAT
tr
0.3
0.3
tf
tSU-STO
0.6
8
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
ELECTRICAL CHARACTERISTICS, PLL and Band Switch
VCC = 4.5 V to 5.5 V, TA = –20°C to 85°C, unless otherwise noted
PARAMETER
Divider ratio
TEST CONDITIONS
15-bit frequency word
MIN
TYP
MAX
UNIT
N
512
32767
fXTAL
ZXTAL
Crystal oscillator frequency
RXTAL = 25 Ω to 300 Ω
4
MHz
Crystal oscillator input impedance
1.6
kΩ
Load = 10 pF/5.1 kΩ, VCC = 5 V,
TA = 25°C
VXLO
XTALOUT output voltage
0.37
0.3
Vp-p
Tuning amplifier low-level output
voltage
VVTUL
RL = 20 kΩ, VTU = 33 V
0.2
0.46
10
V
IVTUOFF
ICP11
ICP10
ICP01
ICP00
VCP
Tuning amplifier leakage current
Tuning amplifier = off, VTU = 33 V
CP[1:0] = 11
µA
600
300
140
70
CP[1:0] = 10
Charge-pump current
µA
CP[1:0] = 01
CP[1:0] = 00
Charge-pump output voltage
Charge-pump leakage current
PLL locked
1.95
V
ICPOFF
VCP = 2 V, TA = 25°C
–15
15
10
nA
Band-switch driver output current
(BS1–BS4)
IBS
mA
V
VBS1
VBS2
IBS = 10 mA
3
Band-switch driver output voltage
(BS1–BS4)
IBS = 10 mA, VCC = 5 V, TA = 25°C
3.5
3.9
Band-switch driver leakage current
(BS1–BS4)
IBSOFF
IP5
VBS = 0 V
8
–5
µA
mA
V
Band-switch port sink current
(P5/ADC)
Band-switch port output voltage
(P5/ADC)
VP5ON
IP5 = –2 mA, VCC = 5 V, TA = 25°C
0.6
ELECTRICAL CHARACRTERISTICS, RF AGC
VCC = 5 V, TA = 25°C, measured in Figure 20 reference measurement circuit at 50-Ω system, IF = 44 MHz, IF filter
characteristics: fpeak = 44 MHz, unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN
TYP
900
9
MAX
UNIT
nA
IOAGC0
ATC = 0
ATC = 1
RF AGC output current
IOAGC1
µA
VAGCSP00
VAGCSP01
VAGCSP02
VAGCSP03
VAGCSP04
VAGCSP05
VAGCSP06
VAGCSP10
VAGCSP11
VAGCSP12
VAGCSP13
VAGCSP14
VAGCSP15
VAGCSP16
T1/ATSS = 0, ATP[2:0] = 000
T1/ATSS = 0, ATP[2:0] = 001
T1/ATSS = 0, ATP[2:0] = 010
T1/ATSS = 0, ATP[2:0] = 011
T1/ATSS = 0, ATP[2:0] = 100
T1/ATSS = 0, ATP[2:0] = 101
T1/ATSS = 0, ATP[2:0] = 110
T1/ATSS = 1, ATP[2:0] = 000
T1/ATSS = 1, ATP[2:0] = 001
T1/ATSS = 1, ATP[2:0] = 010
T1/ATSS = 1, ATP[2:0] = 011
T1/ATSS = 1, ATP[2:0] = 100
T1/ATSS = 1, ATP[2:0] = 101
T1/ATSS = 1, ATP[2:0] = 110
117
114
111
108
105
102
99
Start-point IF output level
dBµV
112
109
106
103
100
97
94
9
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
ELECTRICAL CHARACTERISTICS, Mixer, Oscillator, IF Amplifier
VCC = 5 V, TA = 25°C, measured in Figure 20 reference measurement circuit at 50-Ω system, IF = 44 MHz, IF filter
characteristics: fpeak = 44 MHz (unless otherwise noted)
PARAMETER
TEST CONDITIONS
fin = 57 MHz(1)
fin = 171 MHz(1)
MIN
TYP
35
MAX
UNIT
Gc1
dB
Conversion gain (mixer-IF amplifier),
VHF-LOW
Gc3
35
Gc4
fin = 177 MHz(1)
fin = 467 MHz(1)
fin = 473 MHz(1)
fin = 864 MHz(1)
35
dB
dB
Conversion gain (mixer-IF amplifier),
VHF-HIGH
Gc6
35
Gc7
35
Conversion gain (mixer-IF amplifier),
VHF-UHF
Gc9
35
NF1
fin = 57 MHz
9
Noise figure, VHF-LOW
Noise figure, VHF-HIGH
Noise figure, UHF
dB
NF3
fin = 171 MHz
9
NF4
fin = 177 MHz
9
dB
NF6
fin = 467 MHz
9
NF7
fin = 473 MHz
12
dB
NF9
fin = 864 MHz
12
CM1
fin = 57 MHz(2)
fin = 171 MHz(2)
fin = 177 MHz(2)
fin = 467 MHz(2)
fin = 473 MHz(2)
fin = 864 MHz(2)
79
1% cross-modulation distortion,
VHF-LOW
dBµV
dBµV
dBµV
dBµV
dBµV
dBµV
CM3
79
CM4
79
1% cross-modulation distortion,
VHF-HIGH
CM6
79
CM7
77
1% cross-modulation distortion, UHF
IF output voltage, VHF-LOW
IF output voltage, VHF-HIGH
IF output voltage, UHF
CM9
77
VIFO1
VIFO3
VIFO4
VIFO6
VIFO7
VIFO9
ΦPLVL11
ΦPLVL12
ΦPLVL31
ΦPLVL32
ΦPLVL41
ΦPLVL42
ΦPLVL61
ΦPLVL62
ΦPLVL71
ΦPLVL72
ΦPLVL91
ΦPLVL92
fin = 57 MHz
117
117
117
117
117
117
–90
–95
–85
–95
–85
–90
–77
–90
–80
–85
–77
–90
fin = 171 MHz
fin = 177 MHz
fin = 467 MHz
fin = 473 MHz
fin = 864 MHz
fin = 57 MHz, offset = 1 kHz(3)
fin = 57 MHz, offset = 10 kHz(4)
fin = 171 MHz, offset = 1 kHz(5)
fin = 171 MHz, offset = 10 kHz(4)
fin = 177 MHz, offset = 1 kHz(3)
fin = 177 MHz, offset = 10 kHz(4)
fin = 467 MHz, offset = 1 kHz(5)
fin = 467 MHz, offset = 10 kHz(4)
fin = 473 MHz, offset = 1 kHz(3)
fin = 473 MHz, offset = 10 kHz(4)
fin = 864 MHz, offset = 1 kHz(5)
fin = 864 MHz, offset = 10 kHz(4)
Phase noise, VHF-LOW
Phase noise, VHF-HIGH
Phase noise, UHF
dBc/Hz
dBc/Hz
dBc/Hz
(1) RF input level = 70 dBµV, differential output
(2) fundes = fdes ±6 MHz, Pin = 80 dBµV, AM 1 kHz, 30%, DES/CM = S/I = 46 dB
(3) CP[1:0] = 10 (CP current 350 µA), RS[2:0] = 011 (reference divider 64)
(4) CP[1:0] = 00 (CP current 70 µA), RS[2:0] = 100 (reference divider 128)
(5) CP[1:0] = 11 (CP current 600 µA), RS[2:0] = 100 (reference divider 128)
10
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
Functional Description
Table 1. Write Data Format
I2C Bus Mode
I2C Write Mode (R/W = 0)
MSB
1
LSB
(1)Address byte (ADB)
Divider byte 1 (DB1)
Divider byte 2 (DB2)
Control byte 1 (CB1)
Band-switch byte (BB)
Control byte 2 (CB2)
1
N14
N6
0
0
N13
N5
0
0
MA1
N10
N2
MA0
N9
R/W = 0
N8
A
A
A
A
A
A
0
N12
N4
N11
N3
N7
1
N1
N0
ATP2
0
ATP1
P5
ATP0
BS4
T3
RS2
BS3
T2
RS1
RS0
CP1
1
CP0
1
BS2
BS1
ATC
STBY
T1/ATSS
T0/XLO
(1) A: Acknowledge
Table 2. Description of Data Symbols
SYMBOL
DESCRIPTION
DEFAULT
MA[1:0]
N[14:0]
Address-set bits (see Table 3, Address Selection)
Programmable counter set bits
N14 = N13 = N12 = ... = N0 = 0
CP = 1
N = N14 × 214 + N13 × 213 + ... + N1 × 2 + N0
Charge-pump current-set bit
CP[1:0]
60 µA (CP = 0); 280 µA (CP = 1)
T[2:0}
RF AGC start-point control bits (see Table 4, RF AGC Start Point)
Reference divider ratio-selection bits (see Table 5, Reference Divider Ratio)
Tuning amplifier control bit
ATP[2:0] = 011
RSA = 0, RSB = 1
OS = 0
RSA, RSB
OS
Tuning voltage on (OS = 0)
Tuning voltage off, high impedance (OS = 1)
Band-switch control bits
BS[4:1]
BSn = 0
BSn = 0: OFF
BSn = 1: ON
Band selection by BS[1:2]
BS1
BS2
1
0
0
1
0
1
0
1
VHF-LO
VHF-HI
UHF
Reserved
X
Don't care
11
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
Table 3. Address Selection
MA1
MA0
Voltage Applied on AS Input
0
0
1
1
0
1
0
1
0 V to 0.1 VCC
OPEN, or 0.2 VCC to 0.3 VCC
0.4 VCC to 0.6 VCC
0.9 VCC to VCC
Table 4. RF AGC Start Point
T1/ATSS
ATP2
ATP1
ATP0
IFOUT Level, dBµV
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
117
114
111
108
105
102
99
Disabled
112
109
106
103
100
97
94
Disabled
Table 5. Reference Divider Ratio
RS2
0
RS1
RS0
0
Reference Divider Ratio
0
0
1
1
0
X
24
28
0
1
0
0
50
0
1
64
1
0
128
80
1
1
Table 6. Charge Pump Current
CP1
CP0
Charge Pump Current, µA
0
0
1
1
0
1
0
1
70
140
350
600
12
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
(1)
Table 7. Test Bits/XTALOUT Control
T3
0
T2
0
T1/ATSS
T0/XLO
Device Operation
Normal operation
Normal operation
Test mode
XTALOUT 4-MHz Output
X
X
X
X
0
1
Enabled
0
0
Disabled
X
1
1
X
X
Not available
Not available
X
Test mode
(1) RFAGC and XTALOUT are not available in test mode.
Example I2C Data Write Sequences
Telegram examples:
Start-ADB-DB1-DB2-CB1-BB-CB2-Stop
Start-ADB-DB1-DB2-Stop
Start-ADB-CB1-BB-CB2-Stop
Start-ADB-CB1-BB-Stop
Start-ADB-CB2-Stop
Abbreviations:
ADB: Address byte
BB: Band-switch byte
CB1: Control byte 1
CB2: Control byte 2
DB1: Divider byte 1
DB2: Divider byte 2
Start: Start condition
Stop: Stop condition
I2C Read Mode (R/W = 1)
Table 8. Read Data Format (A: Acknowledge)
MSB
1
LSB
Address byte (ADB)
Status byte (SB)
1
0
1
0
1
0
MA1
A2
MA0
A1
R/W = 1
A0
A
–
POR
FL
X
Table 9. Description of Data Symbols
SYMBOL
MA[1:0]
DESCRIPTION
DEFAULT
Address set bits (see Table 3, Address Selection)
POR
Power-on-reset flag
POR = 1
POR set: power on
POR reset: end-of-data transmission procedure
FL
In-lock flag
PLL locked (FL = 1), unlocked (FL = 0)
Digital data of ADC (see Table 10, ADC Level)
Bit P5 must be set to 0.
A[2:0]
13
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
Table 10. ADC Level(1)
A2
1
A1
0
A0
0
Voltage Applied on ADC Input
0.6 VCC to VCC
0
1
1
0.45 VCC to 0.6 VCC
0.3 VCC to 0.45 VCC
0.15 VCC to 0.3 VCC
0 V to 0.15 VCC
0
1
0
0
0
1
0
0
0
(1) Accuracy is 0.03 × VCC
.
t
(High)
t
r
t
(Low)
SCL
t
hd(STA)
t
su(DAT)
t
f
t
t
hd(DAT )
su(STO)
t
su(STA)
SDA
t
(BUF)
T0101-01
Figure 19. I2C Timing Chart
14
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
APPLICATION INFORMATION
Reference Measurement Circuit
C4
R1
C1
C35
VC1
C3
R30
C37
1
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
VLO OSC B
VLO OSC C
OSC GND
VHI OSC B
VHI OSC C
UHF OSC B1
UHF OSC C1
UHF OSC C2
UHF OSC B2
IF GND
UHF RF IN2
URF2
C2
L1
2
UHF RF IN1
VHI RF IN
VLO RF IN
BS4
C46
C33
3
VHIRF
VLORF
BS4
R2
VC2
VC4
C32
C45
C11
4
R52
L2
C6
5
C34
C31
C7
R32
6
RF GND
MIXOUT2
MIXOUT1
NC
VC3
L4
C8
7
L10
C15
L3
C30
R4
C9
8
L9
C12
R33
R3
9
R5
C10
10
11
12
13
14
15
16
17
18
19
C36
BUS GND
RF AGC
AGC FIL2
AGC FIL1
BS3
C13
R15
R41
IF OUT1
IF OUT1
RFAGC
C29
C14
R21
R42
IF OUT2
C38
R14
C16
VCC
VCC
C18
C28
C19
C17
CP
BS3
BS2
BS1
SDA
SCL
AS
R6
R8
TU
VTU
BS2
C20
R9
P5/ADC
BS1
C21
C22
R13
R12
R11
XTAL1
SDA
P5/ADC
C27
X1
XTAL2
SCL
C26
C23
XTALOUT
XTALOUT
AS
C25
C24
R10
C39
S0143-01
NOTE: This application information is advisory and a performance-check is required for actual application circuits. TI
assumes no responsibility for the consequences of the use of this circuit nor for any infringement of patent or patent
rights of third parties which may result from its use.
Figure 20. Reference Measurement Circuit
15
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
APPLICATION INFORMATION (continued)
Component Values for Measurement Circuit
PART NAME
C1 (VLO OSCB)
C2 (VLO OSCC)
C3 (VLO OSC)
C4 (VLO OSC)
C6 (VHI OSCC)
C7 (UHF OSCB1)
C8 (UHF OSCC1)
C9 (UHF OSCC2)
C10 (UHF OSCB2)
C11 (VHI OSC)
C12 (UHF OSC)
C13 (IFOUT)
C14 (IFOUT)
C15 (UHF OSC)
C16 (VCC)
VALUE
PART NAME
C39 (XTALOUT)
VALUE
1 pF
2.2 nF
7 pF
2 pF
C45 (VHI OSC)
C46 (URF1)
L1 (VLO OSC)
L2 (VHI OSC)
L3 (UHF OSC)
L4 (UHF OSC)
L9 (MIXOUT)
L10 (MIXOUT)
R1 (VLO OSC)
R2 (VHI OSC)
R3 (UHF OSC)
R4 (UHF OSC)
R5 (VTU)
47 pF
2.2 nF
Open
φ 3,0 mm, 7T, wire 0,32 mm
5 pF
φ2,0 mm, 3T, wire 0,4 mm
1 pF
φ1,8 mm, 3T, wire 0,4 mm
1 pF
φ1,8 mm, 3T, wire 0,4 mm
1 pF
680 nH (LK1608R68K-T)
1 pF
680 nH (LK1608R68K-T)
51 pF
3.3 kΩ
3.3 kΩ
2.2 kΩ
1 kΩ
10 pF
2.2 nF
2.2 nF
100 pF
4.7 nF
0.01 µF/50 V
22 pF/50 V
2.2 nF
2.2 nF/50 V
Open
3 kΩ
R6 (CP)
47 kΩ
20 kΩ
Open
5.1 kΩ
330 Ω
330 Ω
330 Ω
0
C17 (CP)
R8 (VTU)
C18 (CP)
R9 (P5/ADC)
R10 (XTALOUT)
R11 (AS)
C19 (VCC)
C20 (VTU)
C21 (P5/ADC)
C22 (XTAL)
R12 (SCL)
27 pF
R13 (SDA)
C23 (XTAL)
27 pF
R14 (VCC)
C24 (XTALOUT)
C25 (AS)
10 pF
R15 (RFAGC)
R21 (IFOUT)
R30 (VLO OSC)
R32 (UHF OSC)
R33 (UHF OSC)
R41 (IFOUT)
R42 (IFOUT)
R52 (VHI OSC)
U1
0
Open
1 kΩ
C26 (SCL)
Open
10
C27 (SDA)
Open
0
C28 (AGCFIL1)
C29 (RFAGC)
C30 (MIXOUT)
C31 (MIXOUT)
C32 (VLORF)
C33 (VHIRF)
C34 (VHI OSC)
C35 (URF2)
0.1 µF
0.15 µF
5 pF
0
1 kΩ
0
2.2 nF
2.2 nF
2.2 nF
0.5 pF
2.2 nF
Open
3.3 kΩ
SN761662
MA2S374
MA2S374
MA2S372
MA2S372
4-MHz crystal
VC1 (VLO OSC)
VC2 (VHI OSC)
VC3 (UHF OSC)
VC4 (VHI OSC)
X1
C36 (VTU)
C37 (VTU)
2.2 nF/50 V
Open
C38 (RGCFIL2)
16
SN761662
DTV TUNER IC
www.ti.com
Test Circuits
SG
SLES161–NOVEMBER 2005
DUT
Spectrum
Analyzer
V
Diff
OUT
VLO RF IN
(VHI RF IN)
IF OUT1
Gc = 20log(V
= 20log(V
Diff/V )
IN
OUT
50 W
/V ) + 6
OUT IN
V
IN
V
OUT
50 W
IF OUT2
50 W
50 W
S0144-01
Figure 21. VHF-Conversion Gain-Measurement Circuit
DUT
SG
Spectrum
Analyzer
V
Diff
OUT
UHF RF IN1
IF OUT1
Gc = 20log(V
= 20log(V
Diff/V )
IN
OUT
50 W
/V ) + 6
OUT IN
V
IN
V
OUT
50 W
UHF RF IN2
IF OUT2
50 W
50 W
S0145-01
Figure 22. UHF-Conversion Gain-Measurement Circuit
NF
Meter
Noise
DUT
Source
B0090-01
Figure 23. Noise-Figure Measurement Circuit
Signal
Generator
f
: P = 80 dBmV
des
Mix
Pad
Modulation
Analyzer
DUT
f
±6 MHz
des
AM 30%, 1 kHz
Signal
Generator
B0091-01
Figure 24. 1% Cross-Modulation Distortion Measurement Circuit
17
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
TYPICAL CHARACTERISTICS
Band-Switch Driver Output Voltage (BS1–BS4)
BS OUTPUT CURRENT
vs
OUTPUT VOLTAGE
5
4
3
2
1
V
= 5.5 V
CC
V
CC
= 5 V
V
CC
= 4.5 V
0
−2 −4 −6 −8 −10 −12 −14 −16 −18
−20
I
– BS Current – mA
BS
G001
Figure 25. Band-Switch Driver Output Voltage
S-Parameter
1
¥
0
50 MHz
430 MHz
1
M0047-01
Figure 26. VLO RFIN, VHI RFIN
18
SN761662
DTV TUNER IC
www.ti.com
SLES161–NOVEMBER 2005
TYPICAL CHARACTERISTICS (continued)
1
¥
0
440 MHz
660 MHz
1
M0047-02
Figure 27. UHF RFIN
1
60 MHz
¥
0
30 MHz
1
M0047-03
Figure 28. IFOUT
19
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