MAX2244EBL-T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX2244EBL-T ,2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power ControlApplicationsmethods, circuit board material, and environment. See theUCSP Reliability Notice in the ..
MAX2247EBC ,2.4GHz SiGe Linear Power AmplifierApplicationsIEEE 802.11b DSSS WLANB1 B3 B4IEEE 802.11g OFDM WLANPD_GND3 GND1OUTMAX2247HomeRF™2.4GHz ..
MAX2247EBC-T ,2.4GHz SiGe Linear Power AmplifierApplicationsIEEE 802.11b DSSS WLANB1 B3 B4IEEE 802.11g OFDM WLANPD_GND3 GND1MAX2247 OUTHomeRF™2.4GH ..
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MAX533ACEE ,2.7V, Low-Power, 8-Bit Quad DAC with Rail-to-Rail Output Buffers
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MAX2244EBL-T
2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control
General Description
The MAX2244/MAX2245/MAX2246 single-supply, low-
voltage power amplifiers (PAs) are designed for 20dBm
Bluetooth™ Class 1 applications in the 2.4GHz to 2.5GHz
band. The MAX2244/MAX2245 deliver a peak output
power of 22dBm with greater than 20dB output-power
control range. The 22dBm output power compensates for
the filter loss between the PA and the antenna, allowing
20dBm to be delivered to the antenna. The MAX2246 pro-
vides a peak output power of 20dBm for a 30% reduction
in supply current.
The PAsintegrate a power detector and closed-loop
power-control circuitry to provide nearly constant output
power over the full range of supply voltage, temperature,
and input power level. The voltage at the analog control
input precisely controls the output power level.
The MAX2244/MAX2245/MAX2246 feature a low-current
shutdown mode through a simple logic input. Internal cir-
cuitry automatically controls the ramp-up/down of the
output power level during turn-on and turn-off to meet
Bluetooth spurious emissions requirements.
The devices operate from a 3V to 3.6V single supply.
The MAX2244/MAX2246 have a power-control voltage
range of 0.5V to 2V, and the MAX2245 has a control
voltage range of 0.9V to 2.2V. The devices are pack-
aged in a miniature ultra chip-scale package (UCSP™),
significantly reducing the required board area.
Applications
Bluetooth Class 1 Radios
802.11 FHSS/HomeRF™ Radios
2.4GHz Cordless Phones
Features2.4GHz to 2.5GHz OperationAccurate Closed-Loop Output Power Control
Over Full Temperature, Supply, and Input Power
RangeConvenient Analog Power-Control Interface22dBm Peak Output Power (MAX2244/MAX2245)20dBm Peak Output with 30% Reduced Supply
Current (MAX2246)Internal Bandwidth-Limited Power Ramping50ΩIntegrated Input Match0.5µA Shutdown Supply Current Ultra Chip-Scale Package (1.56mm ✕1.56mm)
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
Ordering Information
19-2204; Rev 2; 8/03
*UCSP reliability is integrally linked to the user's assembly
methods, circuit board material, and environment. See the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
Bluetooth is a trademark of Ericsson Corp.
Functional Diagram
Pin Configuration appears at end of data sheet.
HomeRF is a trademark of The HomeRF Working Group.
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC= 3V to 3.6V, no RF signals applied, VSHDN≥2V, VPC= 0, TA= -40°C to +85°C, unless otherwise
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.
VCC1, VCC2, RFOUT to GND.................................-0.3V to +6.0V
RFIN/SHDN, PC to GND.............................-0.3V to (VCC+ 0.3V)
RF Input Power (RFIN)....................................................+10dBm
Load Mismatch (VSWR) Without Damage ..............................6:1
Continuous Power Dissipation (TA= +85°C)
9-Pin UCSP (derate 8.8mW/°C above TA= +85°C).....700mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Continuous Operating Lifetime............10 years x 0.935(TA- 65°C)
(for operating temperature 65°C < TA< 85°C)
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC= 3V, PRFIN= 0 to 4dBm, fRFIN= 2.45GHz, 50Ωsystem, VSHDN≥2V, TA= +25°C, unless otherwise
noted. Typical values are at VCC= 3V, PRFIN= 2dBm, fRFIN= 2.45GHz, TA= +25°C, unless otherwise noted.)
design and characterization, but are not production tested.
Note 2:Guaranteed by design and characterization.
Note 3:Assumes the output is optimally matched to cover the 2.4GHz to 2.5GHz band.
Note 4:Valid for the case in which the output stage is matched with a two-section transmission line, lowpass matching network to
minimize the 2nd and 3rd harmonics, as shown in the Typical Application Circuit.
Note 5:Output measured in a 100kHz RBW. Power on/off duty cycle = 50%. Test signal: GFSK, BT = 0.5, 1 bit/symbol, 1Mbps,
frequency deviation = 175kHz.
Note 6:The total turn-on and settling time required for the PA output power to settle to within ±1dB of the final value.
Note 7:The total turn-off time for the PA output power to drop to -10dBm.
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
Typical Operating Characteristics
(Typical Application Circuit, VCC= 3V, PRFIN= 2dBm, fRFIN= 2.45GHz, SHDN= VCC, TA= +25°C, unless otherwise noted.)
10dB/div
Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC= 3V, PRFIN= 2dBm, fRFIN= 2.45GHz, SHDN= VCC, TA= +25°C, unless otherwise noted.)
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
MAX2245
OUTPUT POWER vs. POWER CONTROL (VPC)
MAX2244-46 toc09
VPC (V)
OUTPUT POWER (dBm)
MAX2245
OUTPUT POWER vs. POWER CONTROL (VPC)
MAX2244-46 toc10
VPC (V)
OUTPUT POWER (dBm)
MAX2245
SUPPLY CURRENT vs. POWER CONTROL (VPC)
MAX2244-46 toc11
VPC (V)
SUPPLY CURRENT (mA)
MAX2245
OUTPUT POWER vs. FREQUENCY
MAX2244-46 toc12
FREQUENCY (GHz)
OUTPUT POWER (dBm)
MAX2245
OUTPUT POWER vs. INPUT POWER
MAX2244-46 toc13
INPUT POWER (dBm)
OUTPUT POWER (dBm)-5-10
MAX2245
HARMONIC OUTPUT SPECTRUM
MAX2244/45 toc14
10dB/div
0dBm
0.1FREQUENCY (GHz)13
SHUTDOWN CURRENT vs. TEMPERATURE
MAX2244-46 toc16
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)6040200-20
-40
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
MAX2246
OUTPUT POWER vs. POWER CONTROL (VPC)
MAX2244-46 toc017
VPC (V)
OUTPUT POWER (dBm)
MAX2246
OUTPUT POWER vs. POWER CONTROL (VPC)
MAX2244-46 toc18
VPC (V)
OUTPUT POWER (dBm)
MAX2246 SUPPLY CURRENT
vs. POWER CONTROL (VPC)
MAX2244-46 toc19
VPC (V)
SUPPLY CURRENT (mA)
MAX2246
OUTPUT POWER vs. FREQUENCY
MAX2244-46 toc20
FREQUENCY (GHz)
OUTPUT POWER (dBm)
MAX2246
OUTPUT POWER vs. INPUT POWER
MAX2244-46 toc21
INPUT POWER (dBm)
OUTPUT POWER (dBm)-5-10
MAX2246
HARMONIC OUTPUT SPECTRUM
MAX2244-46 toc22
10dB/div
FREQUENCY (GHz)
0dBm
MAX2246
FSK MODULATED OUTPUT SPECTRUM
MAX2244-46 toc23
10dB/div
0dBm
2.45GHz
0.5MHz/div
S11 OF RFIN
MAX2244-46 toc24
FREQUENCY (GHz)
S11 MAGNITUDE (dB)
Typical Operating Characteristics (continued)
(Typical Application Circuit, VCC= 3V, PRFIN= 2dBm, fRFIN= 2.45GHz, SHDN= VCC, TA= +25°C, unless otherwise noted.)
MAX2244/MAX2245/MAX2246
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
Detailed Description
The MAX2244/MAX2245/MAX2246 are nonlinear PAs
guaranteed to operate over a 2.4GHz to 2.5GHz fre-
quency range from a 3V to 3.6V single supply. The
MAX2244/MAX2245 provide 22dBm output power, and
the MAX2246 provides 20dBm output power at the
highest power setting. The signal path consists of three
amplifier stages: an input amplifier stage with
adjustable gain, and two fixed-gain amplifier stages.
The PAs have a dual-function input (RFIN/SHDN) for
the RF input signal and shutdown control. The shut-
down function is controlled with CMOS level signals,
with a logic low putting the PA into low-current shut-
down. The RF input is internally matched to 50Ω, elimi-
nating the need for external matching.
The MAX2244/MAX2245/MAX2246 have interstage
matching to optimize output power and efficiency. The last
amplifier stage is open collector using an external pullup
inductor or RF choke. The output match for the PAs also
acts as a lowpass filter that attenuates harmonics.
These PAs provide closed-loop power control to pro-
vide a stable output power with variations in tempera-
ture, VCC, and RF input power. The control amplifier
varies the gain of the first stage to equalize the power-
control voltage and the internal power-detector output.
The MAX2244/MAX2246 have a 0.5V to 2V power-con-
trol voltage range, and the MAX2245 has a 0.9V to 2.2V
power-control voltage range.
The internal bias circuit provides separate bias volt-
ages and currents to the amplifier stages. An internal
lowpass RC filter isolates the bias currents, preventing
them from being corrupted by the RF signals. The bias
circuit design also ensures the stability of the PA when
connected to high VSWR loads over all power levels.
Applications Information
Power-Supply Connections
The MAX2244/MAX2245/MAX2246 are designed to oper-
ate from a single, positive supply voltage (VCC) with three
connections made to VCC: VCC1, VCC2, and RFOUT bias.
Join the VCCtraces together using a star layout, which
reduces crosstalk and promotes stable operation. At the
common point of the star, connect 10µF and 10nF de-
coupling capacitors to ground to reduce noise and handle
current transients. Additionally, each leg requires a high-
frequency bypass capacitor and a 1nF power-supply
decoupling capacitor near the IC.
High-frequency bypass capacitors are required close
to the IC. For VCC1, connect a capacitor approximately
1mm from the VCC1pad. The distance of the capacitor
from the pad affects the impedance at VCC1, which
affects output power of the first stage. For optimal out-
put power from stage 1, VCC1requires 0.3nH to 0.4nH
inductance.
The output power of the second stage is affected by the
impedance presented to VCC2, which is controlled by
the distance between the VCC2pad and its bypass
capacitor. For optimal electrical distance, see Figure 1
and Table 1.
RFOUT must be pulled up to VCCthrough an inductor
or an inductive transmission line. If using a transmission
line, a high-frequency bypass capacitor from VCCto
ground is necessary to terminate the transmission line
and set its electrical length. The inductance formed by
the length of the transmission line is part of the output-
matching network, and therefore is critical. See the
Output Matchingsection for more information on
RFOUT requirements.
Pin Description

Partno	Mfg	Dc	Qty	Available	Descript
MAX2244EBL-T \|MAX2244EBLT	MAXIM	N/a	4500	avai	2.5GHz, 22dBm/20dBm Power Amplifiers with Analog Closed-Loop Power Control