PRELIMINARY DATA SHEET
ISG510067
DTV IF AGC AMPLIFIER
FEATURES
• 3.3 V SINGLE SUPPLY OPERATION
• LOW POWER CONSUMPTION (330 mW)
SAW FILTER
FUNCTIONAL DIAGRAM
• LOW DISTORTION
• 85 dB TOTAL VOLTAGE GAIN
• 54 dB TOTAL GAIN CONTROL RANGE
• 25-100 MH
Z
OPERATION
1, X
VDD
28,18
27,17
26,19
25, X
24,15
23,14
22,13
DESCRIPTION
The ISG510067 consists of an input AGC amplifier and a
video/AGC amplifier. The amplifiers are designed to interface
directly with standard saw filters. The AGC is delayed between
the two blocks for optimal NF and IM3 performance across the
full AGC range. The final stage is capable of providing 2 V
PP
into a 500
Ω
load. There are two package options MLP28 and
TSSOP 20.
VIDEO
AMP
21,16
2, 20
NC*
3, 1
NC*
4, X
20,11
VID OUT
19,12
OUTPUT
MATCHING
18,10
VDD
5, X
17, 9
6, 2
VDD
7, 6
RF
AMP
16, 8
15, 7
8, 3
9, 4
10, X
11, 5
12, X
13, X
14, X
APPLICATIONS
• Digital Terrestrial Tuners • Digital TV Sets.
RF
AGC
ELECTRICAL CHARACTERISTICS
SYMBOLS PARAMETERS AND CONDITIONS
RF Performance
RF
IN
G
MAX
V
AGC
AGC
IM3
IF
OUT
NF
G
INPUT
G
VIDEO
(T
A
= 25°C, V
DD
= 3.3 V, unless otherwise specified)
UNITS
MIN
TYP
MAX
RF Input Frequency Range
Maximum Gain*
AGC Voltage
AGC Dynamic Range V
AGC
= 0 to 3 V
Third Order Intermodulation, 1 V
PP
Differential Output, 1K ohm load
Third Order Intermodulation, 2 V
PP
Differential Output, 1K ohm load
IF Output Level, Differential Output, 1K ohm load
Noise Figure, V
AGC
= 3 V
Input Amp Gain, V
AGC
= 3 V
Video Amp Gain, V
AGC
= 3 V
MHz
dB
V
dB
dBc
dBc
V
PP
dB
dB
dB
V
mA
43.75
85
0
54
60
48
1
13.5
44
55
3.3
100
100
3
DC Performance
V
DD
Supply Voltage
I
DD
Supply Current
*
Includes saw filter loss.
ABSOLUTE MAXIMUM RATINGS
(T
C
= 25°C unless otherwise noted)
SYMBOLS
V
DD
(GND)
T
OP
T
STG
PARAMETERS
Supply Voltage (GND)
Operating Temperature
Storage Temperature
Junction Temperature
Thermal Resistance (Ø ja)
UNITS
V
°C
°C
°C
°C/W
RATINGS
-0.3 to +3.6
-40 to +85
-65 to +150
+150
34
Note:
1. Operation in excess of any one of these parameters may result
in permanent damage.
REV. C
7/21/2004
1
ISG510067
PIN ASSIGNMENTS
GND VIDEO
AMP OUT 2
AMP OUT 1
VIDEO IN 2
VIDEO IN 1
GND
GND
GC 1
VDD RF
1
2
3
4
5
6
7
8
9
10
20
19
18
GC 2
GND
AMP OUT 2
AMP OUT 1
GND
VID IN 2
VID IN 1
GND VID
VID OUT 1
VID OUT 2
28
27
26
25
24
23
22
GND
1
21
GND
RF IN 1
RF IN 2
V AGC
GC 2
2
20
VID OUT 2
GC 1
3
ISG 510067
( MLP-28 )
ISG 510067
(TSSOP-20)
17
16
15
14
13
12
11
19
VID OUT 1
GND
4
18
VDD VID
GND RF
GND
5
17
VDD
GND
VDD RF
GND RF
6
16
VDD
VDD
7
15
GND
8
9
10
11
12
13
8
1
VDD
VDD VID
V AGC
GND
GND
RF IN 1
PIN FUNCTIONS
TSSOP-20 MLP-28
PIN NO.
7,16,19
PIN NO.
1, 4, 5, 10,
12,13,14, 15
21, 25, 26
2
3
6
7
8
9
11
16
17
18
19
PIN NAME
GND
GC1
GC2
VDD RF
GND RF
RF IN1
RF IN2
AGC
VDD
VDD
VDD VID
VID OUT1
DESCRIPTION
Ground pins. Connect to the ground plane with shortest possible length to minimize inductance.
Optional Gain control
Optional Gain control
INPUT AMP Supply, +3.3 V.
INPUT AMP Ground. See GND.
INPUT AMP Positive Input. Input Impedance 150 ohms.
INPUT AMP Negative Input. Input Impedance 150 ohms.
Automatic Gain Control, Min Gain @ AGC = 0 V, Max Gain @ AGC = 3.0 V.
Supply Voltage, +3.3 V.
Supply Voltage, +3.3 V.
VIDEO AMP Input Stage Supply, +3.3 V.
VIDEO AMP Negative Output. This pin and VID OUT2 form a 1K ohm ouput impedance.
Open Drain - See Application Page 4.
VIDEO AMP Positive Output. See VID OUT1.
VIDEO AMP Ground. See GND.
VIDEO AMP Negative Input.
VIDEO AMP Positive Input.
INPUT AMP Positive Output. Open Drain . See Application Page 4.
INPUT AMP Negative Output. Open Drain .See Application Page 4.
20
1
2
6
3
4
5
8
9
10
12
11
13
14
15
17
18
20
22
23
24
27
28
RF IN 2
VID OUT2
GND VID
VID IN1
VID IN2
AMP OUT1
AMP OUT2
GND
GND
REV. C
7/21/2004
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ISG510067
TYPICAL PERFORMANCE CURVES
OUTPUT SPECTRUM
10
Z
L =
1 K
Ω
0
80
90
Z
L =
1 K
Ω
GAIN vs. AGC
-10
Output (dBm)
-20
-30
-40
-50
70
Gain (dB)
0
50
100
150
200
250
300
60
50
40
-60
-70
30
0
0.5
1
1.5
2
2.5
3
Frequency (MHz)
AGC (V)
IM3 vs. AGC
75
Z
L =
1 K
Ω
70
65
60
55
50
45
40
V
OUT
=
1 V
PP
V
OUT
=
2 V
PP
OUTPUT FLATNESS
10
5
0
P
OUT
(dB)
IM3 (dB)
-5
-10
-15
-20
-25
-30
0
0.5
1
1.5
2
2.5
3
40
41
42
43
44
45
46
47
48
AGC (V)
Frequency (MHz)
IDD vs. VDD
0.16
0.14
0.12
45
40
35
NOISE FIGURE vs. AGC
Noise Figure (dB)
0.1
30
25
20
15
10
I
DD
(A)
0.08
0.06
0.04
0.02
RF=110MHz
5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
0
0
0.5
1
1.5
2
2.5
3
V
DD
(V)
AGC (V)
REV. C
7/21/2004
3
ISG510067
TYPICAL APPLICATION CIRCUIT
EPCOS X6864D
SAW FILTER
PIN Numbers
MLP-28 , TSSOP-20
2K OHM
1uH
VDD
1uH
28,18
27,17 26,19
25, X
24,15
23,14 22,13
0.1uF
AMP OUT 2
AMP OUT 1
VIDEO IN 2
VIDEO IN 1
0 OHM
1, X
GND VIDEO
GND
GND
GND
VIDEO
AMP
GND
21,16
2, 20
NC*
3, 1
NC*
4, X
GC 2
VID OUT 2
20,11
4:1
200 OHM
SPECTRUM
ANALYZER
50 OHM
GC 1
VID OUT 1
19,12
18,10
0.01uF
GND
VDD VIDEO
VDD
0.1uF
5, X
GND
VDD
17, 9
0.01uF
6, 2
VDD
0.01uF
7, 6
VDD RF
RF
AMP
VDD
16, 8
1000pF
GND RF
GND
15, 7
RF IN 1
RF IN 2
V AGC
GND
GND
GND
8, 3
RF
SOURCE
1000pF
9, 4
10, X
11, 5
12, X
13, X
14, X
AGC
1M OHM
1M OHM
1000pF
10K OHM
0.01uF
Input Amplifier
This amplifier provides a maximum gain of 44 dB. The gain is
controlled by applying a DC voltage (from 0 to 3 V) to the AGC
pin, providing 27 dB of range. The output stage current can be
set between 10 mA (R = 20) and 30 mA (R = 0) by connecting
an external resistor from pin 1 to ground.
Video Amplifier
This amplifier provides a maximum gain of 55 dB. The gain is
controlled by applying a DC voltage (from 0 to 3 V) to the AGC
pin, providing 27 dB of range. The outputs of the video amp
are both open drain and require pull-up inductors to V
DD.
Up
to 2 V
PP
can be delivered into a 500
Ω
load.
Note:
1. The input amplifier and video amplifier are controlled by a single
AGC so the overall dynamic range is the sum of the input amplifier
range and the video amplifier range.
2. Inserting a resistor between GC1 and GC2 will reduce overall gain
of the RF Amp stage. (A 300
Ω
resistor will reduce gain by
approximately 10 dB.)
GND
REV. C
7/21/2004
4
ISG510067
PACKAGE INFORMATION MLP-28
(Units in mm)
1.
2.
3.
4.
5.
6.
7.
Dimensions and tolerances conform to ASME Y14.5-1994.
All dimensions are in millimeters. All angles are in degrees.
N is the total number of terminals.
The terminal numbering convention shall conform to JESD 95-1, SPP-012. The terminal #1 identifier may be either a mold or
marked feature.
Dimension b applies to metallized terminal and is measured between 0.25 and 0.3 mm from terminal tip.
ND and NE refer to the number of terminals on each D and E side respectively.
Co-planarity applies to the exposed heatsink slug as well as the terminals.
REV. C
7/21/2004
5
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