MC13155D [FREESCALE]
Wideband FM IF; WIDEBAND FM IF
| 型号： | MC13155D |
| 厂家： | 
Freescale |
| 描述： | Wideband FM IF |
| 文件： | 总16页 (文件大小：306K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Freescale Semiconductor, Inc.
Order this document by MC13155/D
The MC13155 is a complete wideband FM detector designed for satellite
TV and other wideband data and analog FM applications. This device may
be cascaded for higher IF gain and extended Receive Signal Strength
Indicator (RSSI) range.
WIDEBAND FM IF
• 12 MHz Video/Baseband Demodulator
• Ideal for Wideband Data and Analog FM Systems
• Limiter Output for Cascade Operation
• Low Drain Current: 7.0 mA
SEMICONDUCTOR
TECHNICAL DATA
• Low Supply Voltage: 3.0 to 6.0 V
• Operates to 300 MHz
MAXIMUM RATINGS
16
Rating
Pin
11, 14
1, 16
–
Symbol
V (max)
EE
Value
6.5
Unit
Vdc
Vrms
°C
1
Power Supply Voltage
Input Voltage
V
in
1.0
Junction Temperature
Storage Temperature Range
T
J
+150
D SUFFIX
PLASTIC PACKAGE
CASE 751B
–
T
stg
– 65 to +150
°C
NOTE: Devices should not be operated at or outside these values. The “Recommended
(SO–16)
Operating Conditions” provide for actual device operation.
PIN CONNECTIONS
Input
1
2
3
4
5
6
7
8
Input
16
15
14
13
12
11
10
9
Figure 1. Representative Block Diagram
Decouple
Decouple
Buffered
V
1
V
1
EE
CC
RSSI
Output
RSSI
Output
Limiter
Output
Decouple
15
Output
Output
RSSI Buffer
RSSI
13
12
10
V
2
V
2
CC
EE
16
1
9
8
Input
Input
Limiter Out
Quad Coil
Limiter Out
Quad Coil
Three Stage
Amplifier
Quad
Coil
Detector
(Top View)
2
Decouple
4
5
7
Balanced
Outputs
Limiter
Output
ORDERING INFORMATION
Operating
Temperature Range
Device
Package
MC13155D
T
A
= – 40 to +85°C
SO–16
NOTE: This device requires careful layout and decoupling to ensure stable operation.
Motorola, Inc. 1996
Rev 1
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
RECOMMENDED OPERATING CONDITIONS
Rating
Pin
Symbol
Value
Unit
Power Supply Voltage (T = 25°C)
11, 14
3, 6
V
V
– 3.0 to – 6.0
Grounded
Vdc
A
EE
CC
– 40°C ≤ T ≤ 85°C
A
Maximum Input Frequency
Ambient Temperature Range
1, 16
–
f
300
MHz
in
T
– 40 to + 85
°C
J
DC ELECTRICAL CHARACTERISTICS (T = 25°C, no input signal.)
A
Characteristic
Pin
Symbol
Min
Typ
Max
Unit
Drain Current
11
14
14
I
I
I
2.0
3.0
3.0
2.8
4.3
4.3
4.0
6.0
6.0
mA
11
14
14
(V
EE
(V
EE
= – 5.0 Vdc)
= – 5.0 Vdc)
Drain Current Total (see Figure 3)
11, 14
I
5.0
5.0
5.0
4.7
7.1
7.5
7.5
6.6
10
mA
Total
(V
EE
(V
EE
(V
EE
= – 5.0 Vdc)
= – 6.0 Vdc)
= – 3.0 Vdc)
10.5
10.5
9.5
AC ELECTRICAL CHARACTERISTICS (T = 25°C, f = 70 MHz, V
IF
= – 5.0 Vdc Figure 2, unless otherwise noted.)
EE
A
Characteristic
Input for – 3 dB Limiting Sensitivity
Differential Detector Output Voltage (V = 10 mVrms)
Pin
1, 16
4, 5
Min
Typ
Max
Unit
–
1.0
2.0
mVrms
mV
p–p
in
(f
dev
= ± 3.0 MHz) (V
= – 6.0 Vdc)
= – 5.0 Vdc)
= – 3.0 Vdc)
470
450
380
590
570
500
700
680
620
EE
EE
EE
(V
(V
Detector DC Offset Voltage
RSSI Slope
4, 5
13
– 250
1.4
–
250
2.8
39
mVdc
µA/dB
dB
2.1
35
RSSI Dynamic Range
RSSI Output
13
31
12
µA
(V = 100 µVrms)
(V = 1.0 mVrms)
in
–
–
16
–
2.1
2.4
24
65
75
–
–
36
–
in
(V = 10 mVrms)
in
(V = 100 mVrms)
in
(V = 500 mVrms)
in
–
–
RSSI Buffer Maximum Output Current (V = 10 mVrms)
in
13
–
2.3
–
mAdc
Differential Limiter Output
mVrms
(V = 1.0 mVrms)
(V = 10 mVrms)
in
7, 10
100
–
140
180
–
–
in
Demodulator Video 3.0 dB Bandwidth
4, 5
–
12
–
MHz
Input Impedance (Figure 14)
1, 16
@ 70 MHz Rp (V
= – 5.0 Vdc)
–
–
450
4.8
–
–
Ω
pF
EE
@ 70 MHz Cp (C =C = 100 p)
2
15
Differential IF Power Gain
1, 7, 10, 16
–
46
–
dB
NOTE: Positive currents are out of the pins of the device.
2
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
CIRCUIT DESCRIPTION
The MC13155 consists of a wideband three–stage limiting
amplifier, a wideband quadrature detector which may be
operated up to 200 MHz, and a received signal strength
indicator (RSSI) circuit which provides a current output
linearly proportional to the IF input signal level for
approximately 35 dB range of input level.
Figure 2. Test Circuit
1.0n
1.0n
27
V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
IN2
in
10n
49.9
DEC1
DEC2
V
1
V
1
CC
EE
V
EE
1.0n
100n
1.0k
10
µ
µ
+
+
RSSI
Buffer
DETO1
DETO2
Video
Output
RSSI
V
V
EE
1.0n
1.0n
V
2
V
2
CC
EE
EE
10
100n
Limiter 1
Output
Limiter 2
Output
LIMO1
LIMO2
1.0n
1.0n
330
330
QUAD1
QUAD2
499
20p
L1 – Coilcraft part number 146–09J08S
L1
260n
APPLICATIONS INFORMATION
Evaluation PC Board
The evaluation PCB shown in Figures 19 and 20 is very
versatile and is designed to cascade two ICs. The center
section of the board provides an area for attaching all surface
mount components to the circuit side and radial leaded
components to the component ground side of the PCB (see
Figures 17 and 18). Additionally, the peripheral area
surrounding the RF core provides pads to add supporting
and interface circuitry as a particular application dictates.
This evaluation board will be discussed and referenced in
this section.
Scattering parameter (S–parameter) characterization of
the IF as a two port linear amplifier is useful to implement
maximum stable power gain, input matching, and stability
over a desired bandpass response and to ensure stable
operation outside the bandpass as well. The MC13155 is
unconditionally stable over most of its useful operating
frequency range; however, it can be made unconditionally
stable over its entire operating range with the proper
decoupling of Pins 2 and 15. Relatively small decoupling
capacitors of about 100 pF have a significant effect on the
wideband response and stability. This is shown in the
scattering parameter tables where S–parameters are shown
Limiting Amplifier
Differential input and output ports interfacing the three
stage limiting amplifier provide a differential power gain of
typically 46 dB and useable frequency range of 300 MHz.
The IF gain flatness may be controlled by decoupling of the
internal feedback network at Pins 2 and 15.
for various values of C2 and C15 and at V
– 5.0 Vdc.
of – 3.0 and
EE
3
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
TYPICAL PERFORMANCE AT TEMPERATURE
(See Figure 2. Test Circuit)
Figure 4. RSSI Output versus Frequency and
Input Signal Level
Figure 3. Drain Current versus Supply Voltage
10
100
80
T
= 25
°C
V
= – 5.0Vdc
A
EE
0 dBm
8.0
I
= I + I
Total 14 11
–10 dBm
60
6.0
4.0
2.0
0.0
I
14
– 20 dBm
40
20
0
– 30 dBm
– 40 dBm
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
10
100
f, FREQUENCY (MHz)
1000
V
, SUPPLY VOLTAGE (–Vdc)
EE
Figure 5. Total Drain Current versus Ambient
Temperature and Supply Voltage
Figure 6. Detector Drain Current and Limiter
Drain Current versus Ambient Temperature
9.0
8.5
8.0
5.5
5.0
f = 70 MHz
V
= – 5.0 Vdc
– 5.0 Vdc
EE
V
= – 6.0 Vdc
– 3.0 Vdc
EE
I
14
4.5
4.0
3.5
3.0
2.5
7.5
7.0
6.5
I
11
6.0
5.5
5.0
2.0
– 50
– 50
– 30
–10
10
30
50
70
C)
90
110
– 30
–10
10
30
50
70
C)
90
110
T
AMBIENT TEMPERATURE (
°
T
AMBIENT TEMPERATURE (°
A,
A,
Figure 7. RSSI Output versus Ambient
Temperature and Supply Voltage
Figure 8. RSSI Output versus Input Signal
Voltage (V at Temperature)
in
25.0
24.5
100
80
V
= – 6.0 Vdc
EE
T
= + 85°C
A
24.0
23.5
23.0
22.5
22.0
21.5
+ 25
°C
60
V
= – 5.0 Vdc
EE
– 40°C
40
20
0
V
= – 3.0 Vdc
EE
– 50
– 30
–10
10
30
50
70
C)
90
110
0.1
1.0
10
V , INPUT VOLTAGE (mVrms)
in
100
1000
T
AMBIENT TEMPERATURE (
°
A,
4
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
Figure 9. Differential Detector Output
Voltage versus Ambient Temperature
and Supply Voltage
Figure 10. Differential Limiter Output Voltage
versus Ambient Temperature
(V = 1 and 10 mVrms)
in
750
700
650
600
220
200
180
V
= – 6.0 Vdc
f = 70 MHz
= – 5.0 Vdc
EE
V
= 10 mVrms
in
V
EE
– 5.0 Vdc
– 3.0 Vdc
550
500
450
400
350
160
140
120
V
= 1.0 mVrms
in
– 50
– 30
–10
10
30
50
70
C)
90
110
– 50
– 30
–10
AMBIENT TEMPERATURE (
A,
10
30
50
70
90
T
AMBIENT TEMPERATURE (
°
T
°
C)
A,
Figure 11A. Differential Detector Output Voltage
versus Q of Quadrature LC Tank
Figure 11B. Differential Detector Output Voltage
versus Q of Quadrature LC Tank
1600
1400
2400
2000
1600
1200
800
V
V
f
= – 30 dBm
= – 5.0 Vdc
= 70 MHz
V
V
f
= – 30 dBm
= – 5.0 Vdc
= 70 MHz
in
EE
c
in
EE
c
f
=
±
6.0 MHz
dev
f
=
±
±
±
6.0 MHz
5.0 MHz
4.0 MHz
dev
f
= 1.0 MHz
f
= 1.0 MHz
1200 mod
mod
±
±
5.0 MHz
4.0 MHz
(Figure 16 no external capacitors
1000 between Pins 7, 8 and 9, 10)
(Figure 16 no external capacitors
between Pins 7, 8 and 9, 10)
±
±
3.0 MHz
2.0 MHz
800
600
400
200
0
±
±
±
3.0 MHz
2.0 MHz
1.0 MHz
±
1.0 MHz
5.5
400
0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
6.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Q OF QUADRATURE LC TANK
Q OF QUADRATURE LC TANK
Figure 12. RSSI Output Voltage versus IF Input
Figure 13. – S+N, N versus IF Input
10
0
0
V
f
= – 5.0 Vdc
= 70 MHz
EE
c
S+N
Capacitively coupled
interstage: no attenuation
–1.0
(See Figure 16)
–10
– 20
– 30
– 40
– 50
– 60
– 70
–2.0
–3.0
15 dB Interstage
Attenuator
–4.0
–5.0
f
f
f
= 70 MHz
c
N
= 1.0 MHz
mod
dev
EE
=
± 5.0 MHz
V
= – 5.0 Vdc
– 80
– 60
– 40
– 20
0
20
– 90
– 70
– 50
– 30
–10
10
IF INPUT, (dBm)
IF INPUT (dBm)
5
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
In the S–parameters measurements, the IF is treated as a
Available Gain (MAG). These terms are related in the
following equations:
two–port linear class A amplifier. The IF amplifier is
measured with a single–ended input and output configuration
in which the Pins 16 and 7 are terminated in the series
2
2
2
K = (1– IS I – I S I + I ∆ I ) / ( 2 I S
S
I )
11
22
12 21
where: I ∆ I = I S
S
– S
S
I.
11 22
12 21
combination of a 47 Ω resistor and a 10 nF capacitor to V
ground (see Figure 14. S–Parameter Test Circuit).
CC
2
1/2
I
MAG = 10 log I S I / I S I + 10 log I K – ( K – 1)
21 12
The S–parameters are in polar form as the magnitude
(MAG) and angle (ANG). Also listed in the tables are the
calculated values for the stability factor (K) and the Maximum
where: K > 1. The necessary and sufficient conditions for
unconditional stability are given as K > 1:
2
2
2
B1 = 1 + I S I – I S I – I ∆ I > 0
11
22
Figure 14. S–Parameter Test Circuit
1.0n
C15
SMA
1.0n
47
IF
Input
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
IN2
C2
DEC1
DEC2
V
V
1
V
1
EE
CC
EE
1.0n
100n
10µ
+
RSSI
Buffer
DETO1
DETO2
RSSI
V
2
V
2
CC
EE
SMA
IF
Output
LIMO1
LIMO2
1.0n
1.0n
47
QUAD1
QUAD2
6
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
S–Parameters (V
= – 5.0 Vdc, T = 25°C, C and C = 0 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
Rev S12
Output S22
MAG
K
MAG
dB
32
MHz
1.0
2.0
5.0
7.0
10
MAG
0.94
0.78
0.48
0.59
0.75
0.95
0.98
0.95
0.93
0.91
0.87
0.89
0.61
0.56
0.54
ANG
–13
– 23
1.0
MAG
8.2
ANG
143
109
51
MAG
ANG
7.0
ANG
– 22
– 31
–17
–13
–1.0
0
MAG
2.2
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.002
0.022
0.03
0.87
0.64
0.34
0.33
0.41
0.45
0.52
0.54
0.53
0.50
0.42
0.40
0.52
0.47
0.44
23.5
39.2
40.3
40.9
42.9
42.2
39.8
44.2
39.5
34.9
11.1
3.5
– 40
– 97
– 41
– 82
– 42
– 9.0
112
80
4.2
33.5
33.7
34.6
36.7
46.4
–
8.7
15
34
10.6
5.7
17
19
20
7.0
– 6.0
– 48
– 68
– 93
–139
–179
– 58
–164
92
1.05
0.29
1.05
0.76
0.94
0.97
0.75
2.6
50
–10
–16
– 23
– 34
– 47
–103
–156
162
131
– 3.0
–16
– 22
– 34
– 44
–117
179
112
70
46.4
–
100
150
200
500
700
900
1000
106
77
–
–
57
–
0
13.7
4.5
0.4
1.2
0.048
0.072
– 44
– 48
4.7
0.8
42
76
5.1
S–Parameters (V
= – 5.0 Vdc, T = 25°C, C and C = 100 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
Rev S12
Output S22
K
MAG
1.2
6.0
4.2
3.1
2.4
2.4
2.3
2.2
1.3
1.4
1.3
1.7
6.3
13.3
12.5
MAG
dB
MHz
1.0
2.0
5.0
7.0
10
MAG
0.98
0.50
0.87
0.90
0.92
0.92
0.91
0.91
0.91
0.90
0.86
0.80
0.62
0.56
0.54
ANG
–15
MAG
ANG
174
MAG
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.002
0.012
0.013
0.020
0.034
ANG
–14
–108
100
– 40
– 40
– 87
85
MAG
0.84
0.62
0.47
0.45
0.44
0.49
0.50
0.52
0.50
0.43
0.43
0.57
0.49
0.44
0.44
ANG
– 27
– 35
– 9.0
– 8.0
– 5.0
– 6.0
– 5.0
– 4.0
–11
11.7
39.2
39.9
40.4
41
37.4
35.5
39.2
40.3
41.8
41.9
42
– 2.0
8.0
85.5
19
5.0
9.0
3.0
1.0
20
– 2.0
– 8.0
–11
42.4
41.2
39.1
43.4
38.2
35.5
8.3
–14
50
– 45
– 63
– 84
–126
–160
– 9.0
– 95
–171
154
70
76
41.6
43.6
41.8
39.4
23.5
12.5
2.8
100
150
200
500
700
900
1000
–15
85
– 22
– 33
– 66
– 96
–120
–136
96
– 22
– 21
– 63
–111
–150
–179
78
75
2.9
50
1.0
53
0.69
65
– 0.8
7
MOTOROLA ANALOG IC DEVICE DATA
For More Information On This Product,
Go to: www.freescale.com
Freescale Semiconductor, Inc.
MC13155
S–Parameters (V
= – 5.0 Vdc, T = 25°C, C and C = 680 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
Rev S12
MAG
Output S22
MAG
K
MAG
0.58
1.4
MAG
dB
MHz
1.0
2.0
5.0
7.0
10
MAG
0.74
0.90
0.91
0.91
0.91
0.91
0.90
0.90
0.91
0.94
0.95
0.82
0.66
0.56
0.54
ANG
4.0
MAG
53.6
70.8
87.1
90.3
92.4
95.5
89.7
82.6
77.12
62.0
56.9
12.3
3.8
ANG
110
55
ANG
101
60
ANG
– 35
– 34
– 60
– 67
– 67
–15
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.003
0.007
0.014
0.028
0.048
0.97
0.68
0.33
0.25
0.14
0.12
0.24
0.33
0.42
0.42
0.33
0.44
0.40
0.39
0.41
–
3.0
45.6
49
0
21
–121
–18
33
1.1
0
11
1.2
48.4
47.5
48.2
46.5
47.4
49
– 2.0
– 4.0
– 8.0
–10
–14
– 20
– 33
– 63
– 98
–122
–139
2.0
1.5
20
–16
– 50
–70
–93
–122
–148
–12
–107
177
141
63
1.3
50
– 43
92
26
1.8
70
21
1.4
100
150
200
500
700
900
1000
23
–1.0
– 22
– 62
– 67
–115
–166
165
1.05
0.54
0.75
1.8
96
–
146
79
–
26.9
14.6
4.7
84
4.8
1.3
78
8.0
0.87
76
7.4
0.96
S–Parameters (V
= – 3.0 Vdc, T = 25°C, C and C = 0 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
Rev S12
Output S22
K
MAG
3.2
3.5
10.6
9.1
5.7
0.94
1.4
2.2
3.0
1.7
2.4
2.4
3.0
5.1
7.5
MAG
dB
MHz
1.0
2.0
5.0
7.0
10
MAG
0.89
0.76
0.52
0.59
0.78
0.95
0.96
0.93
0.91
0.86
0.81
0.70
0.62
0.39
0.44
ANG
–14
– 22
5.0
MAG
ANG
136
105
46
MAG
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.003
0.015
0.049
0.11
ANG
2.0
MAG
0.84
0.67
0.40
0.40
0.40
0.51
0.48
0.52
0.51
0.49
0.55
0.40
0.40
0.25
0.33
ANG
– 27
– 37
–13
9.3
30.7
34.3
33.3
34.6
36.3
–
24.2
35.7
38.1
37.2
38.2
39.1
36.8
34.7
33.8
27.8
6.2
– 90
– 32
– 41
– 92
47
12
34
–10
15
16
–1.0
– 4.0
– 6.0
–13
20
5.0
– 9.0
– 50
– 71
– 99
–143
86
50
–11
–17
– 25
– 37
– 49
– 93
–144
–176
166
–103
– 76
–152
53
43.7
41.4
39.0
39.1
35.1
19.5
8.25
–1.9
– 4.8
70
100
150
200
500
700
900
1000
–19
– 34
– 56
–110
–150
163
76
– 41
–133
125
80
93
1.9
56
0.72
0.49
–18
– 52
0.10
127
8
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MC13155
S–Parameters (V
= – 3.0 Vdc, T = 25°C, C and C = 100 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
Rev S12
MAG
Output S22
MAG
K
MAG
1.4
6.0
3.4
2.3
2.0
1.9
2.3
2.3
1.7
1.6
1.7
1.9
4.1
10.0
15.4
MAG
dB
MHz
1.0
2.0
5.0
7.0
10
MAG
0.97
0.53
0.88
0.90
0.92
0.92
0.91
0.91
0.91
0.89
0.86
0.78
0.64
0.54
0.53
ANG
–15
MAG
11.7
37.1
37.7
37.7
38.3
39.6
38.5
36.1
39.6
34.4
32
ANG
171
80
ANG
– 4.0
– 91
– 9.0
–11
– 59
29
ANG
– 27
– 31
– 7.0
– 7.0
– 9.0
– 3.0
– 7.0
– 8.0
–13
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.002
0.013
0.027
0.040
0.043
0.84
0.57
0.48
0.49
0.51
0.48
0.51
0.50
0.52
0.48
0.40
0.46
0.42
0.35
0.38
36.8
34.8
39.7
41
2.0
7.0
18
5.0
8.0
2.0
1.0
41.8
42.5
41.4
40.8
37.8
40.1
37.8
22.1
10.1
– 0.14
– 4.52
20
– 2.0
– 8.0
–11
–15
– 46
– 64
– 85
–128
–163
–12
–102
179
144
50
– 21
49
70
100
150
200
500
700
900
1000
–15
114
120
86
– 22
– 33
– 64
– 98
–122
–136
– 23
– 26
– 71
–109
–147
–171
7.6
94
2.3
58
0.78
0.47
38.6
23
S–Parameters (V
= – 3.0 Vdc, T = 25°C, C and C = 680 pF)
15
EE
Input S11
A
2
Frequency
Forward S21
MAG ANG
Rev S12
Output S22
K
MAG
1.1
MAG
dB
MHz
1.0
2.0
5.0
7.0
10
MAG
0.81
0.90
0.91
0.90
0.91
0.91
0.90
0.90
0.91
0.93
0.90
0.79
0.65
0.56
0.55
ANG
3.0
MAG
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.003
0.008
0.016
0.031
0.50
ANG
–19
– 82
104
– 76
105
59
MAG
0.90
0.66
0.37
0.26
0.18
0.11
0.22
0.29
0.36
0.35
0.17
0.44
0.38
0.38
0.41
ANG
– 32
– 39
– 56
– 55
– 52
–13
33
37
101
52.7
20
43.5
–
2.0
47.8
58.9
60.3
61.8
63.8
60.0
56.5
52.7
44.5
41.2
7.3
0.72
2.3
0
44
–1
11
2.04
2.2
44
– 2.0
– 4.0
– 8.0
–11
3.0
43.9
44.1
43.7
43.2
43
20
– 15
– 48
– 67
– 91
–126
–162
–13
–107
174
137
2.0
50
96
2.3
70
113
177
155
144
80
15
2.3
100
150
200
500
700
900
1000
–14
– 21
– 43
– 65
– 97
–122
–139
5.0
2.0
–17
– 31
– 75
–124
–174
157
1.8
42.7
34.1
22
1.6
3.0
2.3
86
7.1
10.2
0.37
– 3.4
0.80
0.52
73
12
71
11.3
9
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MC13155
DC Biasing Considerations
The DC biasing scheme utilizes two V
connections
selection of the resistor from Pin 12 to V . The RSSI slope
EE
CC
connections (Pins 14 and 11).
(Pins 3 and 6) and two V
is typically 2.1 µA/dB ; thus, for a dynamic range of 35 dB, the
current output is approximately 74 µA. A 47 k resistor will
yield an RSSI output voltage swing of 3.5 Vdc. The RSSI
buffer output at Pin 13 is an emitter–follower and needs an
EE
1 (Pin 14) is connected internally to the IF and RSSI
V
EE
circuits’ negative supply bus while V 2 (Pin 11) is connected
EE
internally to the quadrature detector’s negative bus. Under
positive ground operation, this unique configuration offers the
ability to bias the RSSI and IF separately from the quadrature
detector. When two ICs are cascaded as shown in the 70
MHz application circuit and provided by the PCB (see
Figures 17 and 18), the first MC13155 is used without biasing
its quadrature detector, thereby saving approximately 3.0
mA. A total current of 7.0 mA is used to fully bias each IC,
thus the total current in the application circuit is
external emitter resistor of 10 k to V
.
EE
In a cascaded configuration (see circuit application in
Figure 16), only one of the RSSI Buffer outputs (Pin 13) is
used; the RSSI outputs (Pin 12 of each IC) are tied together
and the one closest to the V
supply trace is decoupled to
ground. The two pins are connected to V through a 47
EE
V
CC
EE
k resistor. This resistor sources a RSSI current which is
proportional to the signal level at the IF input; typically,
1.0 mVrms (– 47 dBm) is required to place the MC13155 into
limiting. The measured RSSI output voltage response of the
application circuit is shown in Figure 12. Since the RSSI
current output is dependent upon the input signal level at the
IF input, a careful accounting of filter losses, matching and
other losses and gains must be made in the entire receiver
system. In the block diagram of the application circuit shown
below, an accounting of the signal levels at points throughout
the system shows how the RSSI response in Figure 12 is
justified.
approximately 11 mA. Both V
pins are biased by the same
CC
supply. V 1 (Pin 3) is connected internally to the positive
CC
bus of the first half of the IF limiting amplifier, while V 2 is
CC
internally connected to the positive bus of the RSSI, the
quadrature detector circuit, and the second half of the IF
limiting amplifier (see Figure 15). This distribution of the V
enhances the stability of the IC.
CC
RSSI Circuitry
The RSSI circuitry provides typically 35 dB of linear
dynamic range and its output voltage swing is adjusted by
Block Diagram of 70 MHz Video Receiver Application Circuit
Input
Level:
– 45 dBm
1.26 mVrms
– 70 dBm
71 Vrms
– 72 dBm
57 Vrms
– 32 dBm
57 Vrms
– 47 dBm
1.0 mVrms
Minimum Input to Acquire
Limiting in MC13155
µ
µ
µ
IF
Input
16
1
16
1
10
7
Saw
Filter
MC13155
MC13155
1:4
Transformer
2.0 dB
(Insertion Loss)
– 25 dB
(Insertion Loss)
40 dB Gain
–15 dB
(Attenuator)
40 dB Gain
Cascading Stages
The limiting IF output is pinned–out differentially,
cascading is easily achieved by AC coupling stage to stage.
In the evaluation PCB, AC coupling is shown, however,
interstage filtering may be desirable in some applications. In
which case, the S–parameters provide a means to implement
a low loss interstage match and better receiver sensitivity.
Where a linear response of the RSSI output is desired
when cascading the ICs, it is necessary to provide at least
10 dB of interstage loss. Figure 12 shows the RSSI response
with and without interstage loss. A 15 dB resistive attenuator
is an inexpensive way to linearize the RSSI response. This
has its drawbacks since it is a wideband noise source that is
dependent upon the source and load impedance and the
amount of attenuation that it provides. A better, although
more costly, solution would be a bandpass filter designed to
the desired center frequency and bandpass response while
carefully selecting the insertion loss. A network topology
shown below may be used to provide a bandpass response
with the desired insertion loss.
Network Topology
1.0n
10
7
16
1
0.22µ
1.0n
10
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MC13155
Quadrature Detector
The quadrature detector is coupled to the IF with internal
2.0 pF capacitors between Pins 7 and 8 and Pins 9 and 10.
For wideband data applications, such as FM video and
satellite receivers, the drive to the detector can be increased
with additional external capacitors between these pins, thus,
the recovered video signal level output is increased for a
given bandwidth (see Figure 11A and Figure 11B).
The wideband performance of the detector is controlled by
the loaded Q of the LC tank circuit. The following equation
defines the components which set the detector circuit’s
bandwidth:
The value of the total damping resistor to obtain the
required loaded Q of 5 can be calculated by rearranging
Equation 1:
R = Q(2πfL)
T
R = 5 (2π)(70)(0.22) = 483.8 Ω.
T
The internal resistance, Rint between the quadrature tank
Pins 8 and 9 is approximately 3200 Ω and is considered in
determining the external resistance, Rext which is calculated
from:
Rext = ((R )(Rint))/ (Rint – R )
T
T
Q = R /X
(1)
T
L
Rext = 570, thus, choose the standard value.
Rext = 560 Ω.
where: R is the equivalent shunt resistance across the LC
T
Tank and X is the reactance of the quadrature inductor at the
L
SAW Filter
IF frequency (X = 2πfL).
L
In wideband video data applications, the IF occupied
bandwidth may be several MHz wide. A good rule of thumb is
to choose the IF frequency about 10 or more times greater
than the IF occupied bandwidth. The IF bandpass filter is a
SAW filter in video data applications where a very selective
response is needed (i.e., very sharp bandpass response).
The evaluation PCB is laid out to accommodate two SAW
filter package types: 1) A five–leaded plastic SIP package.
Recommended part numbers are Siemens X6950M which
operates at 70 MHz; 10.4 MHz 3 dB passband, X6951M
(X252.8) which operates at 70 MHz; 9.2 MHz 3 dB passband;
and X6958M which operates at 70 MHz, 6.3 MHz 3 dB
passband, and 2) A four–leaded TO–39 metal can package.
Typical insertion loss in a wide bandpass SAW filter is 25 dB.
The above SAW filters require source and load
impedances of 50 Ω to assure stable operation. On the PC
board layout, space is provided to add a matching network,
such as a 1:4 surface mount transformer between the SAW
filter output and the input to the MC13155. A 1:4 transformer,
made by Coilcraft and Mini Circuits, provides a suitable
interface (see Figures 16, 17 and 18). In the circuit and
layout, the SAW filter and the MC13155 are differentially
configured with interconnect traces which are equal in length
and symmetrical. This balanced feed enhances RF stability,
phase linearity, and noise performance.
The inductor and capacitor are chosen to form a resonant
LC Tank with the PCB and parasitic device capacitance at the
desired IF center frequency as predicted by:
–1
(2)
fc = (2π √(LC ))
p
where: L is the parallel tank inductor and C is the equivalent
p
parallel capacitance of the parallel resonant tank circuit.
The following is a design example for a wideband detector
at 70 MHz and a loaded Q of 5. The loaded Q of the
quadrature detector is chosen somewhat less than the Q of
the IF bandpass. For an IF frequency of 70 MHz and an
IF bandpass of 10.9 MHz, the IF bandpass Q is
approximately 6.4.
Example:
Let the external Cext = 20 pF. (The minimum value here
should be greater than 15 pF making it greater than the
internal device and PCB parasitic capacitance, Cint ≈
3.0 pF).
C = Cint + Cext = 23 pF
p
Rewrite Equation 2 and solve for L:
2
2
L = (0.159) /(C fc )
p
L = 198 nH, thus, a standard value is chosen.
L = 0.22 µH (tunable shielded inductor).
11
MOTOROLA ANALOG IC DEVICE DATA
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MC13155
12
MOTOROLA ANALOG IC DEVICE DATA
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MC13155
Figure 16. 70 MHz Video Receiver Application Circuit
If Input
1:4
1
5
4
SAW Filter
2
3
220
SAW Filter is Siemens
Part Number X6950M
1.0n
1.0n
RSSI
Output
MC13155
1
2
3
4
5
6
7
8
IN1
IN2 16
DEC1
DEC2 15
10k
100p
100p
10n
V
1
V
1
14
13
CC
EE
RSSI
Buffer
47k
DETO1
DETO2
100n
RSSI 12
1.0n
10n
V
2
V
2
11
CC
EE
LIMO1
LIMO2 10
QUAD1
QUAD2
9
V
1
EE
10µ
+
820
820
820
820
1.0n
1.0n
MC13155
1
2
3
4
5
6
7
8
IN1
IN2 16
DEC1
DEC2 15
100p
100p
10n
V
1
V
1
14
13
CC
EE
100n
RSSI
Buffer
DETO1
DETO2
Detector
Output
33p 1.0k
33p
RSSI 12
1.0k
100n
V
2
V
2
11
V
2
CC
EE
EE
10µ
10n
+
LIMO1
LIMO2 10
2.0p
2.0p
QUAD1
QUAD2
9
560
20p
L
L– Coilcraft part number 146–08J08S
0.22µ
13
MOTOROLA ANALOG IC DEVICE DATA
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MC13155
Figure 17. Component Placement (Circuit Side)
Figure 18. Component Placement (Ground Side)
14
MOTOROLA ANALOG IC DEVICE DATA
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MC13155
Figure 19. Circuit Side View
4.0″
4.0″
Figure 20. Ground Side View
15
MOTOROLA ANALOG IC DEVICE DATA
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MC13155
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC PACKAGE
CASE 751B
(SO–16)
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. 751B–03 IS OBSOLETE, NEW STANDARD
751B–04.
–A
–
16
1
9
M
M
0.25 (0.010)
B
–B
–
P
C
8 PL
8
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
9.80
3.80
1.35
0.35
0.40
MAX
10.00
4.00
1.75
0.49
MIN
MAX
0.393
0.157
0.068
0.019
0.049
0.386
0.150
0.054
0.014
0.016
G
R X 45°
F
1.25
1.27 BSC
0.050 BSC
G
J
K
SEATING
PLANE
0.19
0.10
0.25
0.25
0.008
0.004
0.009
0.009
–T
–
J
M
F
D
16 PL
K
M
P
R
0
5.80
0.25
°
7
6.20
0.50
°
0
°
7°
0.244
0.019
0.229
0.010
M
S
S
0.25 (0.010)
T
B
A
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
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