MAX2645EUB+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX2645EUB+T ,3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA PredriverApplicationsWireless Local LoopPin Configuration appears at end of data sheet.Wireless Broadband Ac ..
MAX264AEPI ,Pin Programmable Universal and Bandpass FiltersELECTRICAL CHARACTERISTICS (Continued) (v* Td." +5v, v- = -5v, CLK, = CLKB = , 5V, 1.5MHz, tas/to ..
MAX264BCPI ,Pin programmable univesal and bandpass filter. Accuracy 2%.Features . Filter Design Software Available . 32-Step Center Frequency Control . 128-Step 0 Cont ..
MAX264BCWI ,Pin Programmable Universal and Bandpass Filtersapplications. Center frequency, Q, and oper- ating mode are all selected via pin-strapped inputs. ..
MAX2651EUB ,GSM900 and DCS1800/PCS1900 Dual-Band / Low-Noise AmplifiersELECTRICAL CHARACTERISTICS—MAX2652(V = +2.7V to +3.3V, BAND = GAIN = V , no input signal, all input ..
MAX2652EUB ,GSM900 and DCS1800/PCS1900 Dual-Band / Low-Noise AmplifiersELECTRICAL CHARACTERISTICS—MAX2653(V = +2.7V to +3.3V, SHDN = GAIN = V , no input signal, all input ..
MAX6003EUR+T ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesMAX6001–MAX600513-1395; Rev 1; 4/99Low -Cost, Low -Pow er, Low -Dropout, SOT23-3 Voltage References
MAX6003EUR+T ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesApplicationsOrdering InformationPortable/Battery-Powered EquipmentNotebook ComputersPIN- SOTPART TE ..
MAX6004EUR+ ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesMAX6001–MAX600513-1395; Rev 1; 4/99Low -Cost, Low -Pow er, Low -Dropout, SOT23-3 Voltage References
MAX6004EUR+T ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesELECTRICAL CHARACTERISTICS—MAX6001(V = +5V, I = 0, T = T to T , unless otherwise noted. Typical val ..
MAX6004EUR-T , Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage References
MAX6005EUR+ ,Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesFeaturesThe MAX6001–MAX6005 family of SOT23, low-cost♦ 1% max Initial Accuracyseries voltage refere ..

MAX2645EUB+T
3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver
General Description
The MAX2645 is a versatile, high-linearity, low-noise
amplifier designed for 3.4GHz to 3.8GHz wireless local
loop (WLL), wireless broadband access, and digital
microwave radio applications. The device features an
externally adjustable bias control, set with a single resis-
tor, that allows the user to meet minimum linearity require-
ments while minimizing current consumption. The
amplifier’s high-gain, low-noise performance and
adjustable input third-order intercept (IP3) allow it to be
used as a low-noise amplifier (LNA) in the receive path, a
PA predriver in the transmit path, or as an LO buffer.
The MAX2645 features a logic-level gain control that pro-
vides a 25dB step reduction in gain, which improves IP3
performance for operation during high input signal level
conditions. Supply current is reduced from 9mA in high-
gain mode to 3mA in low-gain mode. The device also
includes a logic-controlled shutdown mode, which
reduces supply current to 0.1µA. The MAX2645 operates
from a +3V to +5.5V supply and is offered in the miniature
10-pin µMAX package (5mm ✕3mm) with an exposed
paddle. Its performance has been optimized for use with
the MAX2683/MAX2684 3.5GHz SiGe mixers to provide a
complete high-performance, front-end solution for 3.5GHz
applications.
Applications
Wireless Local Loop
Wireless Broadband Access
Digital Microwave Radios
Features3.4GHz to 3.8GHz Frequency RangeLNA Performance (High/Low-Gain Modes)
Gain: +14.4dB/-9.7dB
NF: 2.3dB/15.5dB
Input IP3: +4dBm/+13dBm
Supply Current: 9.2mA/2.7mAHighly Versatile Application
Receive Path 1st and 2nd Stage LNA
Transmit PA Predriver
LO BufferAdjustable IP3 and Supply Current0.1µA Supply Current in Shutdown Mode+3.0V to +5.5V Single-Supply Operation10-Pin µMAX-EP Package (5.0mm x 3.0mm)
MAX2645
19-1759; Rev 1; 8/03
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
Ordering Information
Pin Configuration appears at end of data sheet.
PARTTEMP RANGEPIN-PACKAGE
MAX2645EUB-40°C to +85°C 10 µMAX-EP*
*EP = exposed paddle.
APPLICATION
CIRCUIT
LNA, LOW NF14.4/-9.72.3/15.5+4/+13
+10/+15.5
+11.8/+16.2
2.6/16
2.6/16
14.9/-10.7
15.2/-9.7
LNA, HIGH IP3
PA PREDRIVER
GAIN(dB)NF(dB)IIP3(dBm)
MAX2645
BIAS AND POWER
MANAGEMENT
RFIN
INPUT
3.5GHz
HIGH
GAIN
LOW
GAIN
GND
GAIN STEP
SHUTDOWN
LOGIC
INPUTS
RBIAS
RADIAL STUB
VCC
OUTPUT
TLINE
Typical Operating Circuit
EVALUATION KIT
AVAILABLE
MAX2645
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
ABSOLUTE MAXIMUM RATINGS
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.
VCCto GND...........................................................-0.3V to +6.0V
GAIN, SHDN, RFOUT to GND.....................0.3V to (VCC+ 0.3V)
RFIN Input Power (50Ωsource)........................................16dBm
Minimum RBIAS....................................................................10kΩ
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX-EP
(derate 10.3mW/°C above TA= +70°C) ....................825mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
DC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +5.5V, GAIN = SHDN= VCC, RBIAS= 20kΩ, no RF signals applied, TA= -40°C to +85°C. Typical values are at VCC
= +3.3V, TA= +25°C, unless otherwise indicated.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
Supply Voltage3.05.5V
GAIN = VCC9.210.9RBIAS = 20kΩ,
TA = +25°CGAIN = GND2.73.9
GAIN = VCC11.6RBIAS = 20kΩ,
TA = -40°C to +85°CGAIN = GND4.0
GAIN = VCC12
Operating Supply Current
RBIAS = 15kΩ,
TA = +25°CGAIN = GND3.6
Shutdown Supply CurrentSHDN = GND0.12µA
Input Logic Voltage HighGAIN, SHDN2.0V
Input Logic Voltage LowGAIN, SHDN0.6V
GAIN = SHDN = VCC1Input Logic Bias CurrentGAIN = SHDN = GND-10µA
CAUTION! ESD SENSITIVE DEVICE
MAX2645
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
AC ELECTRICAL CHARACTERISTICS—LNA (Low-Noise Figure Application Circuit)
(MAX2645 EV kit, VCC= GAIN = SHDN= +3.3V,RBIAS= 20kΩ±1%, PRFIN= -20dBm, fRFIN= 3550MHz, Zo= 50Ω, = +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
Frequency Range(Note 2)34003800MHz
GAIN = VCC12.914.415.4Gain (Note 3)GAIN = GND-11.8-9.7-8.0dB
Gain Variation over TemperatureTA = -40°C to +85°C, GAIN = VCC or GND (Note 4)±0.3±0.7dB
Gain Step±24.1dB
GAIN = VCC (Note 5)+4Input Third-Order InterceptGAIN = GND (Note 6)+13dBm
GAIN = VCC-5Input 1dB Compression PointGAIN = GND0dBm
GAIN = VCC (Notes 4, 7)2.33.0Noise FigureGAIN = GND15.5dB
GAIN = VCC25Reverse IsolationGAIN = GND19dB
Gain Step Transition Time(Note 8)1μs
Turn-On/Turn-Off Time(Note 9)0.5μs
AC ELECTRICAL SPECIFICATIONS—LNA (High-Input IP3 Application Circuit)
(MAX2645 EV kit, VCC= GAIN = SHDN= +3.3V,RBIAS= 20kΩ±1%, PRFIN= -20dBm, fRFIN= 3550MHz, Zo= 50Ω, = +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
Frequency Range(Note 2)34003800MHz
GAIN = VCC14.9GainGAIN = GND-10.7dB
Gain Variation over TemperatureTA = -40°C to +85°C, GAIN = VCC or GND±0.3dB
Gain Step25.6dB
GAIN = VCC (Note 6)+10.0Input Third-Order InterceptGAIN = GND (Note 7)+15.5dBm
GAIN = VCC-4Input 1dB Compression PointGAIN = GND0dBm
GAIN = VCC2.6Noise FigureGAIN = GND16dB
GAIN = VCC25Reverse IsolationGAIN = GND19dB
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(HIGH-GAIN MODE)
MAX2645-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +25°C
TA = +85°C
TA = -40°CTA = +25°C
TA = +85°C
RBIAS = 20kΩTA = -40°C
RBIAS = 15kΩ
SUPPLY CURRENT vs. SUPPLY VOLTAGE
(LOW-GAIN MODE)
MAX2645-02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°C
TA = +25°C
TA = +85°C
TA = -40°C
TA = -40°C
RBIAS = 15kΩ
RBIAS = 20kΩ2025
SUPPLY CURRENT vs. RBIAS
MAX2645-03
RBIAS (kΩ)
SUPPLY CURRENT (mA)
HIGH GAIN
LOW GAIN
VCC = 3.3VVCC = 5V
VCC = 5V
VCC = 3.3V
Typical Operating Characteristics
(MAX2645 EVkit, VCC= +3.3V, RBIAS= 20kΩ, fRFIN= 3550MHz, TA = +25°C, unless otherwise noted.)
MAX2645
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
AC ELECTRICAL SPECIFICATIONS—PA Predriver Application Circuit
(MAX2645 EV kit, VCC= GAIN = SHDN= +3.3V,RBIAS= 20kΩ±1%, PRFIN= -20dBm, fRFIN= 3550MHz, Zo= 50Ω, = +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
Frequency Range(Note 2)34003800MHz
GAIN = VCC15.2GainGAIN = GND-9.7dB
Gain Variation over TemperatureTA = -40°C to +85°C, GAIN = VCC or GND±0.3dB
Gain Step24.9dB
GAIN = VCC (Note 6)+11.8Input Third-Order InterceptGAIN = GND (Note 7)+16.2dBm
GAIN = VCC-1.8Input 1dB Compression PointGAIN = GND0dBm
GAIN = VCC2.6Noise FigureGAIN = GND16dB
GAIN = VCC25Reverse IsolationGAIN = GND19dB
Note 1:Limits over temperature guaranteed by correlation to worst-case temperature testing.
Note 2:This is the recommended operating frequency range. Operation outside this frequency range is possible but has not been
characterized. The device is characterized and tested at 3550MHz. For optimum performance at a given frequency, the out-
put matching network must be properly designed. See Applications Informationsection.
Note 3:Specifications are corrected for board losses (0.25dB at input, 0.25dB at output).
Note 4:Guaranteed by design and characterization.
Note 5:Input IP3 measured with two tones, f1= 3550MHz and f2= 3551MHz, at -20dBm per tone.
Note 6:Input IP3 measured with two tones, f1= 3550MHz and f2= 3551MHz, at -12dBm per tone.
Note 7:Specifications are corrected for board losses (0.25dB at input).
Note 8:Time from when GAIN changes state to when output power reaches 1dB of its final value.
Note 9:Time from when SHDNchanges state to when output power reaches 1dB of its final value.
MAX2645
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
GAIN vs. FREQUENCY
(HIGH-GAIN MODE)
MAX2645-04
FREQUENCY (GHz)
GAIN (dB)
TA = +25°C
TA = +85°C
TA = -40°C
LOW-NOISE FIGURE CIRCUIT-15
GAIN vs. FREQUENCY
(LOW-GAIN MODE)
MAX2645-05
FREQUENCY (GHz)
GAIN (dB)
TA = +85°C
TA = -40°C
TA = +25°C
LOW-NOISE FIGURE CIRCUIT13.0
GAIN vs. SUPPLY VOLTAGE
(HIGH-GAIN MODE)
MAX2645-06
SUPPLY VOLTAGE (V)
GAIN (dB)
TA = +25°C
TA = +85°C
TA = -40°C
LOW-NOISE FIGURE CIRCUIT
GAIN vs. SUPPLY VOLTAGE
(LOW-GAIN MODE)
MAX2645-07
SUPPLY VOLTAGE (V)
GAIN (dB)
TA = -40°C
TA = +25°C
TA = +85°C
LOW-NOISE FIGURE CIRCUIT22.0
GAIN STEP
vs. SUPPLY VOLTAGE
MAX2645-08
SUPPLY VOLTAGE (V)
GAIN STEP (dB)
TA = +25°C
TA = +85°C
TA = -40°C
LOW-NOISE FIGURE CIRCUIT14.0
GAIN vs. RBIAS
(HIGH-GAIN MODE)
MAX2645-09
RBIAS (kΩ)
GAIN (dB)
VCC = 5V
VCC = 3.3V
LOW-NOISE FIGURE CIRCUIT
GAIN vs. RBIAS
(LOW-GAIN MODE)
MAX2645-10
RBIAS (kΩ)
GAIN (dB)VCC = 3.3V
VCC = 5V
LOW-NOISE FIGURE CIRCUIT0
NOISE FIGURE vs. FREQUENCY
(HIGH-GAIN MODE)
MAX2645-11
FREQUENCY (GHz)
NOISE FIGURE (dB)
LOW-NOISE FIGURE CIRCUIT10
NOISE FIGURE vs. FREQUENCY
(LOW-GAIN MODE)
MAX2645-12
FREQUENCY (GHz)
NOISE FIGURE (dB)
LOW-NOISE FIGURE CIRCUIT
Typical Operating Characteristics (continued)
(MAX2645 EVkit, VCC= +3.3V, RBIAS= 20kΩ, fRFIN= 3550MHz, TA = +25°C, unless otherwise noted.)
MAX2645
3.4GHz to 3.8GHz SiGe
Low-Noise Amplifier/PA Predriver
Typical Operating Characteristics (continued)
(MAX2645 EVkit, VCC= +3.3V, RBIAS= 20kΩ, fRFIN= 3550MHz, TA = +25°C, unless otherwise noted.)
NOISE FIGURE vs. RBIAS
(HIGH-GAIN MODE)
MAX2645-13
RBIAS (kΩ)
NOISE FIGURE (dB)
LOW-NOISE FIGURE CIRCUIT1.0
INPUT IP3 vs. SUPPLY VOLTAGE
(HIGH-GAIN MODE)
MAX2645-14
SUPPLY VOLTAGE (V)
INPUT IP3 (dBm)
TA = -40°C
TA = +85°C
TA = +25°C
LOW-NOISE FIGURE CIRCUIT10.5
INPUT IP3 vs. SUPPLY VOLTAGE
(LOW-GAIN MODE)
MAX2645-15
SUPPLY VOLTAGE (V)
INPUT IP3 (dBm)
TA = +85°C
TA = +25°C
TA = -40°C
LOW-NOISE FIGURE CIRCUIT
INPUT IP3 vs. RBIAS
(HIGH-GAIN MODE)
MAX2645-16
RBIAS (kΩ)
INPUT IP3 (dBm)
VCC = 5V
VCC = 3.3V
LOW-NOISE FIGURE CIRCUIT
INPUT IP3 vs. RBIAS
(LOW-GAIN MODE)
MAX2645-17
RBIAS (kΩ)
INPUT IP3 (dBm)
VCC = 5V
VCC = 3.3V
LOW-NOISE FIGURE CIRCUIT-8.5
INPUT P1dB vs. SUPPLY VOLTAGE
(HIGH-GAIN MODE)
MAX2645-18
SUPPLY VOLTAGE (V)
INPUT P1dB (dBm)
TA = -40°C
TA = +25°C
TA = +85°C
LOW-NOISE FIGURE CIRCUIT
OUTPUT POWER vs. INPUT POWER
(LOW-GAIN MODE)
MAX2645-19
INPUT POWER (dBm)
OUTPUT POWER (dBm)
TA = +25°C
TA = +85°C
TA = -40°C
LOW-NOISE FIGURE CIRCUIT
INPUT P1dB vs. RBIAS
(HIGH-GAIN MODE)
MAX2645-20
RBIAS (kΩ)
INPUT P1dB (dBm)
VCC = 5V
VCC = 3.3V
LOW-NOISE FIGURE CIRCUIT1.00
INPUT VSWR vs. FREQUENCY
MAX2645-21
FREQUENCY (GHz)
VSWR
HIGH GAIN
LOW GAIN
LOW-NOISE FIGURE CIRCUIT

Partno	Mfg	Dc	Qty	Available	Descript
MAX2645EUB+T	MAXIM	N/a	24101	avai	3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver