The MAX19794 is a monolithic device designed using
one of Maxim’s proprietary SiGe BiCMOS processes. The
part operates from a single +5V supply or alternatively
operates from a single +3.3V supply. It is available
in a compact 36-pin TQFN package (6mm x 6mm x
0.8mm) with an exposed pad. Electrical performance
is guaranteed over the -40NC to +100NC extended
temperature range.
Benefits and Features
S
Wide Band Coverage
RF Frequency Range from 10MHz to 500MHz
S
High Linearity
Greater than +34.4dBm IIP3 over the Full
Attenuation Range
+21.8dBm Input P
1dB
S
Integrates Two Analog Attenuators in One
Monolithic Device
S
Two Convenient Control Options
Single Analog Voltage
On-Chip, SPI-Controlled 10-Bit DAC
S
Step-Up/Down Pulse Command Inputs
S
Flexible Attenuation Control Ranges
22.4dB (per Attenuator)
44.7dB (both Attenuators Cascaded)
S
Linear dB/V Analog Control Response Curve
Simplifies Automatic Leveling Control and Gain
Trim Algorithms
S
Excellent Attenuation Flatness over Wide
Frequency Ranges and Attenuation Settings
S
On-Chip Comparator (for Successive
Approximation Measurement of Attenuator
Control Voltage)
S
Low 13mA Supply Current
S
Single +5V or 3.3V Supply Voltage
S
Pin Similar with MAX19791, MAX19792, and
MAX19793
S
Lead-Free Package
Applications
Broadband System Applications, Including
Wireless Infrastructure Digital and Spread-
Spectrum Communication Systems
WCDMA/LTE, TD-SCDMA/TD-LTE, WiMAX®,
cdma2000®, GSM/EDGE and MMDS Base
Stations
VSAT/Satellite Modems
Military Systems
Microwave Point to Point Systems
Lineup Gain Trim
Temperature Compensation Circuits
Automatic Level Control (ALC)
Transmitter Gain Control
Receiver Gain Control
General Test Equipment
WiMAX is a registered certification mark and regisitered
service mark of WiMAX Forum.
cdma2000 is a registered trademark of Telecommunications
Industry Association.
Ordering Information
appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to
www.maxim-ic.com/MAX19794.related.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX19794
10MHz to 500MHz Dual Analog Voltage Variable
Attenuator with On-Chip 10-Bit SPI-Controlled DAC
ABSOLUTE MAXIMUM RATINGS
V
CC
.......................................................................-0.3V to +5.5V
REF_IN..............................-0.3V to Minimum (V
CC
+ 0.3V, 3.6V)
REF_SEL,DAC_LOGIC,MODE, DWN, UP,
DIN, CLK,
CS
................-0.3V to Minimum (V
CC
+ 0.3V, 3.6V)
COMP_OUT, DOUT ..............................................-0.3V to +3.6V
IN_A, OUT_A, IN_B, OUT_B ....................... -0.3V to V
CC
+ 0.3V
CTRL (except for test mode)....................... -0.3V to V
CC
+ 0.3V
Maximum CTRL Pin Load Current
(CTRL configured as an output)....................................0.3mA
RF Input Power at IN_A, IN_B, OUT_A, OUT_B ........... +20dBm
Continuous Power Dissipation (Note 1) ..............................2.8W
Operating Case Temperature Range (Note 2) ...-40NC to +100NC
Maximum Junction Temperature....................................... 150NC
Storage Temperature ....................................... -65NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
Based on junction temperature T
J
= T
C
+ (B
JC
x V
CC
x I
CC
). This formula can be used when the temperature of the
exposed pad is known while the device is soldered down to a PCB. See the
Application Information
section for details. The
junction temperature must not exceed +150NC.
Note 2:
T
C
is the temperature on the exposed pad of the package. TA is the ambient temperature of the device and PCB.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
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