MAX3532EAX ,Upstream CATV Driver AmplifierApplicationsGND 2 35 TXENCable Modems Telephony over CableGND 3 34 VOUT-CATV Set-Top Box GND 4 33 V ..
MAX3535ECWI+ ,+3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with ±15kV ESD ProtectionApplicationsST2 3 26 DEGND1 4 25 DIIsolated RS-485 SystemsSystems with Large Common-Mode VoltagesIn ..
MAX3535EEWI ,+3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with 【15kV ESD ProtectionELECTRICAL CHARACTERISTICS TABLE (MAX3535E)(V = +3.0V to +5.5V, V = +3.13V to +7.5V, T = -40°C to + ..
MAX3535EEWI+T ,+3V to +5V, 2500VRMS Isolated RS-485/RS-422 Transceivers with ±15kV ESD ProtectionFeatures♦ 2500V RS-485 Bus Isolation Using On-ChipThe MAX3535E/MXL1535E isolated RS-485/RS-422 full ..
MAX3538UTC+ ,Broadband Variable-Gain AmplifiersApplicationsRANGE CODEOpenCable Set-Top Boxes and Televisions MAX3537UTC 0°C to +85°C 12 Thin QFN-E ..
MAX353CSE ,Precision, Quad, SPST Analog Switches
MAX7219CWG ,Serially Interfaced / 8-Digit LED Display DriversGeneral Description ________
MAX7219CWG+ ,Serially Interfaced, 8-Digit, LED Display DriversFeaturesThe MAX7219/MAX7221 are compact, serial input/out-♦♦ 10MHz Serial Interfaceput common-catho ..
MAX7219CWG+T ,Serially Interfaced, 8-Digit, LED Display DriversFeaturesThe MAX7219/MAX7221 are compact, serial input/out-♦♦ 10MHz Serial Interfaceput common-catho ..
MAX7219ENG ,Serially Interfaced / 8-Digit LED Display DriversGeneral Description ________
MAX7219ENG+ ,Serially Interfaced, 8-Digit, LED Display DriversFeaturesThe MAX7219/MAX7221 are compact, serial input/out-♦♦ 10MHz Serial Interfaceput common-catho ..
MAX7219EWG ,Serially Interfaced / 8-Digit LED Display DriversFeaturesThe MAX7219/MAX7221 are compact, serial input/out-' 10MHz Serial Interfaceput common-cathod ..
MAX3532EAX
Upstream CATV Driver Amplifier
________________General DescriptionThe MAX3532 is a programmable power amplifier for
use in upstream cable applications. The device outputs
up to 62dBmV (continuous wave) through a 1:2 (voltage
ratio) transformer when driven with 36dBmV at its input.
It features variable gain, which is controlled via a 3-wire
digital serial bus and available in 1dB steps. The operat-
ing frequency ranges from 5MHz to 42MHz.
The MAX3532 offers three operating modes: high power,
low noise, and transmit disable. High-power mode
achieves the highest output levels, while low-noise mode
achieves the lowest output noise when driving lower out-
put levels. Transmit disable mode places the device in a
high-isolation state with minimum output noise, for use
between bursts in TDMA systems.
Two power-down modes are also available. Software shut-
down mode permits power-down of all analog circuitry while
maintaining the programmed gain setting. Shutdown mode
disables all circuitry and reduces current consumption
below 10µA.
The MAX3532 comes in a 36-pin SSOP package screened
for the extended-industrial temperature range (-40°C to
+85°C).
________________________ApplicationsCable Modems Telephony over Cable
CATV Set-Top Box
____________________________FeaturesSingle +5V SupplyOutput Level Ranges from Less than 8dBmV
to 62dBmV, in 1dB StepsGain Programmable in 1dB Steps350mW Typical Power Dissipation Transmit-Disable ModeTwo Shutdown Modes
MAX3532
Upstream CATV Driver Amplifier
___________________Pin Configuration
__________Typical Operating Circuit†Protected under U.S. Patent5,748,027
MAX3532
Upstream CATV Driver Amplifier
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +4.75V to +5.25V, no RF applied, TA= -40°C to +85°C, unless otherwise noted.)
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.
VCC........................................................................-0.5V to +7.0V
Input Voltage Levels (all inputs).................-0.3V to (VCC+ 0.3V)
Continuous RMS Input Voltage (VIN+, VIN-)..................60dBmV
Continuous Current (VOUT+, VOUT-)...............................100mA
Continuous Power Dissipation (TA= +70°C)
36-Pin SSOP (denote at 11mW/°C above +70°C)........900mW
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
AC ELECTRICAL CHARACTERISTICS(VCC= +5V, VIN= 36dBmV, SHDN= TXEN = 1, fIN= 20MHz, ZLOAD= 75Ωthrough a 1:2 transformer with two precision 8.0Ωback-
termination resistors, TA= -40°C to +85°C, unless otherwise noted. Typical values are measured at TA= +25°C.)
MAX3532
Upstream CATV Driver Amplifier
Note 1:Guaranteed by design and characterization.
AC ELECTRICAL CHARACTERISTICS (continued)(VCC= +5V, VIN= 36dBmV, SHDN= TXEN = 1, fIN= 20MHz, ZLOAD= 75Ωthrough a 1:2 transformer with two precision 8.0Ωback-
termination resistors, TA= -40°C to +85°C, unless otherwise noted. Typical values are measured at TA= +25°C.)
__________________________________________Typical Operating Characteristics(VCC= 5.0V, VIN= 36dBmV, fIN= 20MHz, SHDN=TXEN = 1, ZLOAD= 75Ωthrough a 1:2 transformer with two precision 8.0Ωback-
termination resistors, TA= +25°C, unless otherwise noted.)
MAX3532
Upstream CATV Driver Amplifier
_____________________________Typical Operating Characteristics (continued)(VCC= +5V, VIN= 36dBmV, SHDN= TXEN = 1, fIN= 20MHz, ZLOAD= 75Ωthrough a 1:2 transformer with two precision 8.0Ωback-
termination resistors, TA= -40°C to +85°C, unless otherwise noted. Typical values are measured at TA= +25°C.)
MAX3532
Upstream CATV Driver Amplifier
______________________________________________________________Pin Description
MAX3532
_______________Detailed DescriptionThe following sections describe the blocks shown in the
Functional Diagram (Figure 1).
Programmable-Gain AmplifierThe MAX3532’s processing path is made up of the pro-
grammable-gain amplifier (PGA) and the transmit
power amplifier, which together provide better than
64dB of output level control in 1dB steps.
The PGA is implemented as a programmable Gilbert
cell attenuator. It uses a differential architecture to
achieve maximum linearity. When it is driven single
ended, specified performance is achieved given that
the unused input is decoupled to ground. The gain of
the PGA is determined by the serial-data interface. See
Table 2.
Transmit Power AmplifierThe transmit power amp is capable of driving +8dBmV
to +62dBmV differentially when driven with +36dBmV. To
achieve the necessary swing from a single +5V supply,
an external 1:2 transformer must be used. The output of
the transmit power amplifier is a very low-impedance
emitter follower, which requires two 8Ωseries termination
resistors to achieve adequate output return loss.
The power amplifier’s gain is set via the serial-data
interface. The transmit power amplifier has a switchable
+16dB or +0dB gain to achieve high linearity or low
noise, respectively. High-gain mode sets the power
amp’s gain to +16dB, allowing for the highest output
signal swings. Low-noise mode sets the gain to 0dB,
which achieves the lowest output noise.
Shutdown ModeIn normal operation the shutdown pin (SHDN) is driven
high. When SHDNis asserted low, all circuits within the
IC are disabled. Only leakage currents flow in this
state. Data stored within the serial-data interface latch-
es will be lost upon shutting down the part.
Transmit-Disable ModeWhen the TXEN pin is asserted high, the device is in
transmit mode. When TXEN is driven low, the transmit
amplifier switches to common-mode operation and the
output signal appears at the output pins VOUT+ and
VOUT- with the same phase. These identical signals
cancel within the output transformer core, providing
high isolation from input to output. Optimum isolation is
achieved in low-noise mode with a low gain setting.
Serial InterfaceThe serial interface has an active-low enable (CS) to
bracket the data, with data clocked in MSB first on the
rising edge of SCLK. Data is stored in the storage latch
on the rising edge of CS. The serial interface controls
the state of the PGA and output amplifier. The register
format is shown in Tables 1 and 2. Serial-interface tim-
ing is shown in Figure 2.
Transmit ModesThe hardware TXEN line is ANDed with software bit D7,
so both TXEN and D7 must be high to transmit. Bit D6
governs whether the device is set to high-gain mode (D6
= 1) or to low-noise mode (D6 = 0). High-power mode
should be used for output levels above 45dBmV. This
transition point optimizes the MAX3532’s distortion perfor-
mance, but either mode may be used throughout the full
complement of programmed gain states. Bits D5–D0
define 64 PGA gain states, nominally 1dB each.
Upstream CATV Driver Amplifier
