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PDF MAX-3510EEP Data sheet ( Hoja de datos )
| Número de pieza | MAX-3510EEP | |
| Descripción | Upstream CATV Amplifier | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1398; Rev 2; 8/99
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Upstream CATV Amplifier
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
PART
MAX3510EEP
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
20 QSOP
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
CONTROL
LOGIC
12
SHDN
18
TXEN
0.001µF
+
5
VIN+
ANTI-ALIAS
INPUT
FILTER
–
+5V
0.1µF
6
VIN-
0.001µF 2 VCC1
4 GND1
3 GND
7 GND
1 GND
MAX3510
GND2
VCC2
CEXT1
VOUT+
20
19 0.1µF
+5V
17
0.0033µF
16
2:1
15
VOUT-
CEXT2
N.C.
GND
SCLK
SDA
CS
14
13
11
10
9
8
+5V
0.1µF
0.1µF
CONTROL
LOGIC
OUTPUT
________________________________________________________________ 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.
1 page  
Upstream CATV Amplifier
Typical Operating Characteristics (continued)
(VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω through a 2:1 transformer, TA = +25°C, unless
otherwise noted.)
VOLTAGE GAIN vs. GAIN CONTROL WORD
30
28
26 f = 40MHz
24
f = 5MHz
22
20 f = 60MHz
GAIN STEP vs. GAIN CONTROL WORD
1.25
1.15
1.05
0.95
OUTPUT IMPEDANCE
(75Ω REFERENCE)
MAX3510 toc10
5MHz
TRANSMIT-DISABLE
MODE
TRANSMIT
MODE
18
0.85
16
65MHz
14
48
50 52 54 56 58 60 62
GAIN CONTROL WORD (DECIMAL)
64
0.75
0
6 12 18 24 30 36 42 48 54 60
GAIN CONTROL WORD (DECIMAL)
OUTPUT RETURN LOSS vs. FREQUENCY
0
TRANSMIT OUTPUT NOISE vs. GAIN
-20
POWER-UP/POWER-DOWN
TRANSIENTS vs. OUTPUT LEVEL
100
4
TRANSMIT
8 MODE
TRANSMIT-DISABLE
MODE
12
16
-25
-30
-35
-40
-45
10
1
20
5 15 25 35 45 55 65 75 85 95 105
FREQUENCY (MHz)
-50
-33 -27 -21 -15 -9 -3 3 9 15 21 27
GAIN (dB)
0.1
0
10 20 30 40 50
OUTPUT LEVEL (dBmV)
60
2nd HARMONIC DISTORTION vs.
INPUT FREQUENCY AND OUTPUT LEVEL
-40
-45
VOUT = 60dBmV
-50 VOUT = 57dBmV
-55
-60 VOUT = 6dBmV
-65 VOUT = 30dBmV
-70
-75
-80
0
10 20 30 40 50 60 70
FREQUENCY (MHz)
3rd HARMONIC DISTORTION vs.
INPUT FREQUENCY
-35
-40
-45
VOUT = 60dBmV
-50
VOUT = 54dBmV
-55
-60 VOUT = 48dBmV
-65 VOUT = 24dBmV
-70 VOUT = 6dBmV
-75
0
10 20 30 40 50 60 70
INPUT FREQUENCY (MHz)
_______________________________________________________________________________________ 5
5 Page 
Upstream CATV Amplifier
Pin Configuration
TOP VIEW
GND 1
VCC1 2
GND 3
GND1 4
VIN+ 5
VIN- 6
GND 7
CS 8
SDA 9
SCLK 10
MAX3510
20 GND2
19 VCC2
18 TXEN
17 CEXT1
16 VOUT+
15 VOUT-
14 CEXT2
13 N.C.
12 SHDN
11 GND
QSOP
Chip Information
TRANSISTOR COUNT: 736
______________________________________________________________________________________ 11
11 Page | ||
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| PDF Descargar | [ Datasheet MAX-3510EEP.PDF ] | |
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