For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Description
The MAX3510 is a programmable power amplifier for
use in CATV upstream applications. The device outputs
up to 64dBmV (continuous wave) through a 2:1 (voltage
ratio) transformer. It features variable gain controlled by
a 3-wire digital serial bus. Gain control is available in
1dB steps. The device operates over a frequency
range of 5MHz to 65MHz.
The MAX3510 offers a transmit-disable mode, which
places the device in a high-isolation state for use
between bursts in TDMA systems. In this mode the out-
put stage is shut off, minimizing output noise. When
entering and leaving transmit-disable mode, transients
are kept to 7mV nominal at full gain. In addition, supply
current is reduced to 25mA.
Two power-down modes are available. Software-shutdown
mode permits power-down of all analog circuitry while
maintaining the programmed gain setting. Shutdown
mode disables all circuitry and reduces current consump-
tion to less than 10µA.
The MAX3510 is available in a 20-pin QSOP package
for the extended-industrial temperature range (-40°C to
+85°C).
Applications
Cable Modems
Telephony over Cable
CATV Set-Top Box
CATV Status Monitor
Features
o
Ultra-Low Power-Up/Down Transients,
7mV Typical at 59dBmV Output
o
Single +5V Supply
o
Output Level Ranges from <8dBmV to 64dBmV
o
Gain Programmable in 1dB Steps
o
Low Transmit Output Noise Floor: -47dBmV
(160kHz BW)
o
Low Transmit-Disable Output Noise: -70dBmV
o
Two Power-Down Modes
MAX3510
Upstream CATV Amplifier
________________________________________________________________
Maxim Integrated Products
1
12
SHDN
CONTROL
LOGIC
MAX3510
18
5
TXEN
VIN+
6
2
4
3
VIN-
+5V
V
CC
1
GND1
GND
20
GND2
19
OUTPUT
+5V
2:1
0.1
µ
F
0.1
µ
F
0.1
µ
F
0.001
µ
F
0.001
µ
F
CONTROL
LOGIC
0.0033
µ
F
0.1
µ
F
+5V
V
CC
2
17
16
15
CEXT1
VOUT+
VOUT-
14
CEXT2
13
N.C.
11
10
9
8
GND
SCLK
SDA
CS
7
GND
1
GND
INPUT
+
ANTI-ALIAS
FILTER
Typical Operating Circuit
19-1398; Rev 2; 8/99
PART
MAX3510EEP
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
20 QSOP
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Pin Configuration appears at end of data sheet.
Ordering Information
MAX3510
Upstream CATV Amplifier
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, TXEN = SHDN = high, D7 = 1, T
A
= -40°C to +85°C, unless otherwise noted. No input signal applied.
Typical parameters are at T
A
= +25°C.)
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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
(V
CC
1, V
CC
2), VOUT+, VOUT- ................... -0.5V to +10.0V
Input Voltage Levels (all inputs),
CEXT1, CEXT2.........................................-0.3V to (V
CC
+ 0.3V)
Continuous Input Voltage (VIN+, VIN-)...............................2Vp-p
Continuous Current (VOUT+, VOUT-).................................80mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin QSOP (derate at 12.3mW/°C above +70°C)....1067mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
TXEN = low
TXEN = low, D7 = 0
SHDN = low, TXEN = low
CONDITIONS
mA
26
30
I
CC
Supply Current Transmit-Disable
Mode
mA
109
126
I
CC
V
4.75
5.25
V
CC
Supply Voltage
Supply Current Transmit Mode
µA
-100
I
BIASL
Input Low Current
µA
100
I
BIASH
Input High Current
mA
1.4
2.0
I
CC
Supply Current Software-
Shutdown Mode
µA
1
10
I
CC
Supply Current Shutdown Mode
V
2.0
V
INH
Input High Voltage
V
0.8
V
INL
Input Low Voltage
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, TXEN = SHDN = high, D7 = 1, V
IN
= 34dBmV differential, output impedance = 75
through a 2:1 trans-
former, T
A
= -40°C to +85°C, unless otherwise noted. Typical parameters are at T
A
= +25°C.)
V
OUT
= 60dBmV, f
IN
= 42MHz (Notes 1, 2)
V
OUT
= 60dBmV, f
IN
= 65MHz (Notes 1, 2)
dB
-0.9
-1
-1.6
-1.8
A
V
= 26dB, 42MHz (Note 1)
V
OUT
= 60dBmV, -3dB (Note 1)
CONDITIONS
Gain Rolloff
dBm
18.0
20.0
P1dB
1dB Compression Point
MHz
84
100
f
3dB
Bandwidth
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
-26
Gain control word = 1,
T
A
= -40°C to +85°C
26
Gain control word = 63,
T
A
= 0°C to +85°C
27
Gain control word = 63,
T
A
= -40°C to 0°C
Gain control word = 50,
T
A
= -40°C to +85°C
f
IN
= 5MHz
to 42MHz
16.7
20.4
dB
A
V
Voltage Gain
dB
0.7
1
1.3
Output Step Size
A
V
= -26dB to +27dB,
T
A
= -40°C to +85°C
f
IN
= 5MHz to 42MHz
A
V
= -26dB to +26dB,
T
A
= -40°C to 0°C
0.65
1
1.3
f
IN
= 10MHz
dBc
MAX3510
Upstream CATV Amplifier
_______________________________________________________________________________________
3
BW = 160kHz, A
V
= -26dB (Note 1)
BW = 160kHz, A
V
= 26dB (Note 1)
f
IN
= 5MHz to 65MHz
(Note 1)
f
IN
= 5MHz to 65MHz, single-ended,
T
A
= +25°C (Note 1)
CONDITIONS
dBc
47
-46
-78
Transmit Mode Noise
7.7
12.2
8.0
13.5
Z
IN
k
1.4
1.5
Input Impedance
75
Z
OUT
Output Impedance
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +4.75V to +5.25V, TXEN = SHDN = high, D7 = 1, V
IN
= 34dBmV differential, output impedance = 75
through a 2:1 trans-
former, T
A
= -40°C to +85°C, unless otherwise noted. Typical parameters are at T
A
= +25°C.)
Input tones at 40MHz and 40.2MHz,
V
IN
= 28dBmV/tone, V
OUT
= +54dBmV/tone,
T
A
= +25°C (Note 1)
f
IN
= 33MHz,
T
A
= -40°C to +85°C
-59
-53
-55
-50
dBc
-54
-50
2nd Harmonic Distortion
f
IN
= 22MHz,
T
A
= -40°C to +85°C
-54
-50
-58
-53
dBc
A
V
= 26dB, V
IN
swept from 34dBmV to
38dBmV (Note 1)
dB
0.1
AM/AM
AM to AM
A
V
= 26dB, V
IN
swept from 34dBmV to
38dBmV (Note 1)
degrees
1
AM/PM
AM to PM
HD2
f
IN
= 65MHz, V
OUT
= +59dBmV,
T
A
= +25°C (Note 1)
HD3
3rd Harmonic Distortion
f
IN
= 65MHz, V
OUT
= +59dBmV,
T
A
= +25°C (Note 1)
-49
-44
IM3
Two-Tone Third-Order Distortion
dBc
dB
8.9
13.9
R
L
Output Return Loss in Transmit
Mode
8.7
13.5
TXEN = low,
f
IN
= 5MHz to 65MHz
(Note 1)
7.1
12.0
R
L
dB
Output Return Loss in
Transmit-Disable Mode
-56
-53
T
A
= 0°C
T
A
= +25°C
T
A
= +85°C
T
A
= 0°C
T
A
= +25°C
T
A
= +85°C
V
OUT
= +54dBmV
V
OUT
= +59dBmV
V
OUT
= +54dBmV
V
OUT
= +59dBmV
Input tones at 65MHz and 65.2MHz,
V
IN
= 28dBmV/tone, V
OUT
= 53dBmV/tone,
T
A
= +25°C (Note 1)
-54
-51
9.7
12.7
Gain = 2dB or lower, T
A
= +25°C (Note 1)
Gain = 26dB, T
A
= +25°C (Note 1)
mVp-p
0.7
3.7
7
37
TXEN Transient Step Size
dBmV
TXEN = low, BW = 160kHz,
A
V
= +26dB, f
IN
= 5MHz to 65MHz (Note 1)
dBmV
-70
Transmit-Disable Mode Noise
Floor
TXEN low, gain control word = 61,
f
IN
= 65MHz
dB
36
45
Isolation in Transmit-Disable
Mode
TXEN rise/fall time < 0.1µs, T
A
= +25°C (Note 1)
µs
3.2
5
TXEN Transient Duration
MAX3510
Upstream CATV Amplifier
4
_______________________________________________________________________________________
Note 1:
Guaranteed by design and characterization.
Note 2:
Reference to 5MHz.
TIMING CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, TXEN = SHDN = high, D7 = 1, T
A
= +25°C, unless otherwise noted.)
COMMENT
ns
10
t
SDAS
SDA to SCK Setup Time
ns
20
t
SENH
ns
10
t
SENS
CS to SCK Rise Setup Time
CS to SCK Rise Hold Time
ns
50
t
SCKL
SCK Pulse Width Low
ns
20
t
SDAH
SDA to SCK Hold Time
ns
50
t
DATAH
SDA Pulse Width High
ns
50
t
DATAL
SDA Pulse Width Low
ns
50
t
SCKH
SCK Pulse Width High
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Typical Operating Characteristics
(V
CC
= +5V, V
IN
= +34dBmV, TXEN = SHDN = high, f
IN
= 20MHz, Z
LOAD
= 75
through a 2:1 transformer, T
A
= +25°C, unless
otherwise noted.)
102
104
108
106
110
112
-50
0
-25
25
50
75
100
SUPPLY CURRENT vs. TEMPERATURE
MAX3510 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
CC
= 5.25V
V
CC
= 4.75V
0
0.4
0.8
1.2
1.6
2.0
4.75
4.95 5.0
4.85 4.9
4.8
5.05 5.1 5.15 5.2 5.25
VOLTAGE GAIN vs. SUPPLY VOLTAGE
(GAIN STATE = 33)
MAX3510 toc02
SUPPLY VOLTAGE (V)
VOLTAGE GAIN (dB)
-40°C
0°C
+25°C
+85°C
26.6
26.8
4.75
4.95 5.0
4.85 4.9
4.8
5.05 5.1 5.15 5.2 5.25
VOLTAGE GAIN vs. SUPPLY VOLTAGE
(GAIN STATE = 60)
MAX3510 toc03
SUPPLY VOLTAGE (V)
VOLTAGE GAIN (dB)
-40°C
+25°C
+85°C
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
-50
0
-25
25
50
75
100
VOLTAGE GAIN vs. TEMPERATURE
(GAIN STATE = 33)
MAX3510 toc04
TEMPERATURE (°C)
VOLTAGE GAIN (dB)
5.25V
5.0V
4.75V
40
-60
1
10
100
1000
VOLTAGE GAIN vs. FREQUENCY
-40
MAX3510 toc05
FREQUENCY (MHz)
VOLTAGE GAIN (dB)
-20
0
20
30
-50
-30
-10
10
G
F
E
D
C
B
A
A = 63
B = 57
C = 48
D = 36
E = 24
F = 12
G = 6
GAIN CONTROL WORD:
-40
-30
30
-10
-20
0
10
20
40
0
12 18 24
6
30 36
54
48
60
42
VOLTAGE GAIN vs. GAIN CONTROL WORD
MAX3510 toc06
GAIN CONTROL WORD (DECIMAL)
VOLTAGE GAIN (dB)
f = 5MHz
f = 40MHz
MAX3510
Upstream CATV Amplifier
_______________________________________________________________________________________
5
-80
-70
-75
-60
-65
-45
-50
-55
-40
0
20
10
30
40
50
60
70
2nd HARMONIC DISTORTION vs.
INPUT FREQUENCY AND OUTPUT LEVEL
MAX3510 toc14
FREQUENCY (MHz)
2nd HARMONIC DISTORTION (dBc)
V
OUT
= 60dBmV
V
OUT
= 30dBmV
V
OUT
= 6dBmV
V
OUT
= 57dBmV
-75
-65
-70
-55
-60
-40
-45
-50
-35
0
20
10
30
40
50
60
70
MAX3510 toc15
INPUT FREQUENCY (MHz)
3rd HARMONIC DISTORTION (dBc)
3rd HARMONIC DISTORTION vs.
INPUT FREQUENCY
V
OUT
= 24dBmV
V
OUT
= 48dBmV
V
OUT
= 6dBmV
V
OUT
= 60dBmV
V
OUT
= 54dBmV
20
12
16
8
4
0
5
45
35
15 25
55 65 75 85 95 105
OUTPUT RETURN LOSS vs. FREQUENCY
MAX3510 toc11
FREQUENCY (MHz)
RETURN LOSS (dB)
TRANSMIT-DISABLE
MODE
TRANSMIT
MODE
-50
-35
-40
-45
-30
-25
-20
-33
-9
-15
-27 -21
-3
9
3
15 21 27
TRANSMIT OUTPUT NOISE vs. GAIN
MAX3510 toc12
GAIN (dB)
OUTPUT NOISE (dBmV IN 160kHz)
0.1
1
10
100
0
40
30
10
20
50
60
POWER-UP/POWER-DOWN
TRANSIENTS vs. OUTPUT LEVEL
MAX3510 toc13
OUTPUT LEVEL (dBmV)
TRANSIENT LEVEL (mVp-p)
14
18
16
22
20
24
26
28
30
48
52
54
50
56
58
60
62
64
VOLTAGE GAIN vs. GAIN CONTROL WORD
MAX3510 toc07
GAIN CONTROL WORD (DECIMAL)
VOLTAGE GAIN (dB)
f = 5MHz
f = 40MHz
f = 60MHz
0.75
0.85
0.95
1.05
1.15
1.25
0
12 18
6
24 30 36 42 48 54 60
GAIN STEP vs. GAIN CONTROL WORD
MAX3510 toc08
GAIN CONTROL WORD (DECIMAL)
GAIN STEP (dB)
OUTPUT IMPEDANCE
(75
REFERENCE)
MAX3510 toc10
5MHz
65MHz
TRANSMIT-DISABLE
MODE
TRANSMIT
MODE
Typical Operating Characteristics (continued)
(
V
CC
= +5V, V
IN
= +34dBmV, TXEN = SHDN = high, f
IN
= 20MHz, Z
LOAD
= 75
through a 2:1 transformer, T
A
= +25°C, unless
otherwise noted.)
PDF 
ZIP