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19-1398; Rev 2; 8/99
ANUAL
N KIT M EET
ATIO
SH
EVALU
S DATA
OLLOW
F
Upstream CATV Amplifier
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
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).
MAX3510
Ordering Information
PART
MAX3510EEP
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
20 QSOP
Applications
Cable Modems
CATV Set-Top Box
Telephony over Cable
CATV Status Monitor
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
12
CONTROL
LOGIC
0.001µF
+
5
VIN+
VOUT+
INPUT
ANTI-ALIAS
FILTER
16
SHDN
18
TXEN
V
CC
2
CEXT1
GND2
20
19
17
0.0033µF
2:1
OUTPUT
+5V
0.1µF
+5V
MAX3510
–
+5V
0.1µF
6
0.001µF 2
4
3
7
1
VIN-
V
CC
1
GND1
GND
GND
GND
VOUT-
15
0.1µF
0.1µF
CEXT2
N.C.
GND
SCLK
SDA
CS
14
13
11
10
9
8
CONTROL
LOGIC
________________________________________________________________
Maxim Integrated Products
1
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.
Upstream CATV Amplifier
MAX3510
ABSOLUTE MAXIMUM RATINGS
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
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.
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.)
PARAMETER
Supply Voltage
Supply Current Transmit Mode
Supply Current Transmit-Disable
Mode
Supply Current Software-
Shutdown Mode
Supply Current Shutdown Mode
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
SYMBOL
V
CC
I
CC
I
CC
I
CC
I
CC
V
INH
V
INL
I
BIASH
I
BIASL
-100
TXEN = low
TXEN = low, D7 = 0
SHDN
= low, TXEN = low
2.0
0.8
100
CONDITIONS
MIN
4.75
109
26
1.4
1
TYP
MAX
5.25
126
30
2.0
10
UNITS
V
mA
mA
mA
µA
V
V
µA
µA
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, TXEN =
SHDN
= high, D7 = 1, V
IN
= 34dBmV differential, output impedance = 75Ω through a 2:1 trans-
former, T
A
= -40°C to +85°C, unless otherwise noted. Typical parameters are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
Gain control word = 1,
T
A
= -40°C to +85°C
f
IN
= 5MHz
to 42MHz
Voltage Gain
A
V
Gain control word = 63,
T
A
= 0°C to +85°C
Gain control word = 63,
T
A
= -40°C to 0°C
f
IN
= 10MHz
Bandwidth
Gain Rolloff
1dB Compression Point
P1dB
f
3dB
Gain control word = 50,
T
A
= -40°C to +85°C
27
dB
26
16.7
84
100
-0.9
-1.6
20.0
1
1
-1
-1.8
20.4
MHz
dB
dBm
1.3
dB
0.65
1.3
MIN
TYP
MAX
-26
UNITS
V
OUT
= 60dBmV, -3dB (Note 1)
V
OUT
= 60dBmV, f
IN
= 42MHz (Notes 1, 2)
V
OUT
= 60dBmV, f
IN
= 65MHz (Notes 1, 2)
A
V
= 26dB, 42MHz (Note 1)
A
V
= -26dB to +27dB,
T
A
= -40°C to +85°C
A
V
= -26dB to +26dB,
T
A
= -40°C to 0°C
18.0
0.7
Output Step Size
f
IN
= 5MHz to 42MHz
2
_______________________________________________________________________________________
Upstream CATV Amplifier
AC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +4.75V to +5.25V, TXEN =
SHDN
= high, D7 = 1, V
IN
= 34dBmV differential, output impedance = 75Ω through a 2:1 trans-
former, T
A
= -40°C to +85°C, unless otherwise noted. Typical parameters are at T
A
= +25°C.)
PARAMETER
Transmit Mode Noise
Transmit-Disable Mode Noise
Floor
Isolation in Transmit-Disable
Mode
TXEN Transient Duration
TXEN Transient Step Size
Input Impedance
Output Impedance
Output Return Loss in Transmit
Mode
Output Return Loss in
Transmit-Disable Mode
Z
IN
Z
OUT
R
L
f
IN
= 5MHz to 65MHz
(Note 1)
TXEN = low,
f
IN
= 5MHz to 65MHz
(Note 1)
T
A
= 0°C
T
A
= +25°C
T
A
= +85°C
T
A
= 0°C
T
A
= +25°C
T
A
= +85°C
R
L
8.0
8.7
8.9
7.1
7.7
9.7
SYMBOL
CONDITIONS
BW = 160kHz, A
V
= 26dB (Note 1)
BW = 160kHz, A
V
= -26dB (Note 1)
TXEN = low, BW = 160kHz,
A
V
= +26dB, f
IN
= 5MHz to 65MHz (Note 1)
TXEN low, gain control word = 61,
f
IN
= 65MHz
TXEN rise/fall time < 0.1µs, T
A
= +25°C (Note 1)
Gain = 26dB, T
A
= +25°C (Note 1)
Gain = 2dB or lower, T
A
= +25°C (Note 1)
f
IN
= 5MHz to 65MHz, single-ended,
T
A
= +25°C (Note 1)
1.4
36
45
3.2
7
0.7
1.5
75
13.5
13.5
13.9
12.0
12.2
12.7
-56
-53
dBc
Input tones at 65MHz and 65.2MHz,
V
IN
= 28dBmV/tone, V
OUT
= 53dBmV/tone,
T
A
= +25°C (Note 1)
f
IN
= 33MHz,
T
A
= -40°C to +85°C
V
OUT
= +54dBmV
V
OUT
= +59dBmV
-54
-59
-55
-54
-58
-54
-49
0.1
1
-51
-53
-50
-50
-53
-50
-44
dB
degrees
dBc
dBc
dBc
dB
dB
5
37
3.7
47
MIN
TYP
MAX
-78
-46
-70
UNITS
dBc
dBmV
dBmV
dB
µs
mVp-p
kΩ
Ω
MAX3510
Input tones at 40MHz and 40.2MHz,
V
IN
= 28dBmV/tone, V
OUT
= +54dBmV/tone,
T
A
= +25°C (Note 1)
Two-Tone Third-Order Distortion
IM3
2nd Harmonic Distortion
HD2
f
IN
= 65MHz, V
OUT
= +59dBmV,
T
A
= +25°C (Note 1)
f
IN
= 22MHz,
T
A
= -40°C to +85°C
V
OUT
= +54dBmV
V
OUT
= +59dBmV
3rd Harmonic Distortion
HD3
f
IN
= 65MHz, V
OUT
= +59dBmV,
T
A
= +25°C (Note 1)
AM to AM
AM to PM
AM/AM
AM/PM
A
V
= 26dB, V
IN
swept from 34dBmV to
38dBmV (Note 1)
A
V
= 26dB, V
IN
swept from 34dBmV to
38dBmV (Note 1)
_______________________________________________________________________________________
3
Upstream CATV Amplifier
MAX3510
TIMING CHARACTERISTICS
(V
CC
= +4.75V to +5.25V, TXEN =
SHDN
= high, D7 = 1, T
A
= +25°C, unless otherwise noted.)
PARAMETER
CS
to SCK Rise Setup Time
CS
to SCK Rise Hold Time
SDA to SCK Setup Time
SDA to SCK Hold Time
SDA Pulse Width High
SDA Pulse Width Low
SCK Pulse Width High
SCK Pulse Width Low
SYMBOL
t
SENS
t
SENH
t
SDAS
t
SDAH
t
DATAH
t
DATAL
t
SCKH
t
SCKL
COMMENT
MIN
10
20
10
20
50
50
50
50
TYP
MAX
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
Note 1:
Guaranteed by design and characterization.
Note 2:
Reference to 5MHz.
Typical Operating Characteristics
(V
CC
= +5V, V
IN
= +34dBmV, TXEN =
SHDN
= high, f
IN
= 20MHz, Z
LOAD
= 75Ω through a 2:1 transformer, T
A
= +25°C, unless
otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX3510 toc01
VOLTAGE GAIN vs. SUPPLY VOLTAGE
(GAIN STATE = 33)
-40°C
1.6
VOLTAGE GAIN (dB)
0°C
1.2
MAX3510 toc02
VOLTAGE GAIN vs. SUPPLY VOLTAGE
(GAIN STATE = 60)
MAX3510 toc03
112
2.0
26.8
110
SUPPLY CURRENT (mA)
V
CC
= 5.25V
VOLTAGE GAIN (dB)
108
V
CC
= 4.75V
106
-40°C
0.8
+25°C
0.4
+85°C
+25°C
+85°C
104
102
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
0
4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25
SUPPLY VOLTAGE (V)
26.6
4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25
SUPPLY VOLTAGE (V)
VOLTAGE GAIN vs. TEMPERATURE
(GAIN STATE = 33)
MAX3510 toc04
VOLTAGE GAIN vs. FREQUENCY
30
20
VOLTAGE GAIN (dB)
10
0
-10
-20
-30
-40
D
E
F
G
GAIN CONTROL WORD:
A = 63 C = 48 E = 24 G = 6
B = 57 D = 36 F = 12
1
10
100
1000
FREQUENCY (MHz)
A
B
C
MAX3510 toc05
VOLTAGE GAIN vs. GAIN CONTROL WORD
30
20
VOLTAGE GAIN (dB)
10
0
-10
-20
-30
-40
0
6
12 18 24 30 36 42 48 54 60
GAIN CONTROL WORD (DECIMAL)
f = 40MHz
f = 5MHz
MAX3510 toc06
1.6
1.4
1.2
VOLTAGE GAIN (dB)
1.0
0.8
0.6
0.4
0.2
0
-50
-25
0
25
50
75
5.25V
4.75V
5.0V
40
40
-50
-60
100
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Upstream CATV Amplifier
MAX3510
Typical Operating Characteristics (continued)
(
V
CC
= +5V, V
IN
= +34dBmV, TXEN =
SHDN
= high, f
IN
= 20MHz, Z
LOAD
= 75Ω through a 2:1 transformer, T
A
= +25°C, unless
otherwise noted.)
VOLTAGE GAIN vs. GAIN CONTROL WORD
MAX3510 toc07
GAIN STEP vs. GAIN CONTROL WORD
MAX3510 toc08
30
28
26
VOLTAGE GAIN (dB)
24
f = 5MHz
22
20
18
f = 60MHz
f = 40MHz
OUTPUT IMPEDANCE
(75Ω REFERENCE)
MAX3510 toc10
1.25
1.15
GAIN STEP (dB)
5MHz
1.05
TRANSMIT-DISABLE
MODE
0.95
TRANSMIT
MODE
0.85
16
14
48
50
52
54
56
58
60
62
64
GAIN CONTROL WORD (DECIMAL)
0.75
0
6
12 18 24 30 36 42 48 54 60
GAIN CONTROL WORD (DECIMAL)
65MHz
OUTPUT RETURN LOSS vs. FREQUENCY
MAX3510 toc11
TRANSMIT OUTPUT NOISE vs. GAIN
MAX3510 toc12
POWER-UP/POWER-DOWN
TRANSIENTS vs. OUTPUT LEVEL
MAX3510 toc13
0
-20
OUTPUT NOISE (dBmV IN 160kHz)
-25
-30
-35
-40
-45
-50
100
TRANSIENT LEVEL (mVp-p)
4
RETURN LOSS (dB)
TRANSMIT
MODE
TRANSMIT-DISABLE
MODE
10
8
12
1
16
20
5
15 25 35 45 55 65 75 85 95 105
FREQUENCY (MHz)
0.1
-33 -27 -21 -15 -9 -3
3
9
15 21 27
0
10
20
30
40
50
60
GAIN (dB)
OUTPUT LEVEL (dBmV)
2nd HARMONIC DISTORTION vs.
INPUT FREQUENCY AND OUTPUT LEVEL
MAX3510 toc14
3rd HARMONIC DISTORTION vs.
INPUT FREQUENCY
-40
-45
-50
-55
-60
-65
-70
-75
V
OUT
= 48dBmV
V
OUT
= 24dBmV
V
OUT
= 6dBmV
V
OUT
= 60dBmV
V
OUT
= 54dBmV
MAX3510 toc15
-40
2nd HARMONIC DISTORTION (dBc)
-45
-50
-55
-60
-65
-70
-75
-80
0
10
20
30
40
50
60
V
OUT
= 6dBmV
V
OUT
= 30dBmV
V
OUT
= 60dBmV
V
OUT
= 57dBmV
-35
3rd HARMONIC DISTORTION (dBc)
70
0
10
20
30
40
50
60
70
FREQUENCY (MHz)
INPUT FREQUENCY (MHz)
_______________________________________________________________________________________
5

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