March 9, 2001
BTI Confidential & Proprietary Information
Page 1 of 4
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OVERVIEW DATA SHEET: BT2577
2.4GHz RF TRANSCEIVER
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Features
2.4GHz ISM Band RF Transceiver
ETS 300 328
Air Interface complies with FCC Part 15 Rules
Power Management for Minimizing Supply Current
Power Supply 3.0V + 10%
Power Control for TX tranmission
Operating Temperature: -40C to +85C
Functions
Receiver:
Low Noise Amplifier (LNA) w/ Gain Control
Image Reject RF Mixer
RSSI
GFSK Demodulator
FM (analog)/FSK (digital) output
Transmitter:
FM/FSK Modulator
Upconversion Mixer
Power Amplifier with Power Control (9 dBm/
16dBm)
RF VCO
Applications
2.4GHz ISM Band Applications
Wireless local loop subscriber unit
Bluetooth
TM
wireless application products
HomeRF
TM
wireless application products
General Description
The BT2577 is a high-performance transceiver for
worldwide 2.4GHz ISM band applications. It includes
on-chip features such as the LNA, Modulator / Demodu-
lator, RF VCO, image-rejection mixer and upconversion
mixer.
The receiver section of the BT2577 contains a Low
Noise Amplifier (LNA), a downconverter (image rejection
mixer), IF AMP, Limiter, FM demodulator, data slicer,
RSSI, and RF Voltage Control Oscillator (VCO). The
receiver is designed to require a minimal number of
external components and pin count for cost effective-
ness.
The transmitter section will share the same RF VCO with
the receiver, but also includes FSK modulator, upcon-
verter, and power amplifier. The transmitter also
requires minimal external components for reducing mass
production cost.
Since there is no IF or RF PLL included on the BT2577,
the design engineer can choose the most appropriate
RF-IF PLL to use based upon their unique system power
consumption, cost and performance requirements.
Keeping the PLL Synthesizer separate from the rest of
the RFIC Transceiver also makes it possible to accom-
plish lower noise, and higher peformance designs, due
to the improved isolation between the high and low fre-
quency synthesizer sections and the RX and TX signal
conversion chains.
Ordering Information
BT2577
2.4GHz RF Transceiver
BTI, 13825 Cerritos Corporate Dr., Cerritos CA. 90703, U.S.A.
Tel (562) 407-0500 Fax (562) 407-0510 sales@betheltronix.com www.betheltronix.com
2.4GHz RF TRANSCEIVER
BT2577
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March 9, 2001
BTI Confidential & Proprietary Information
Page 3 of 4
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Absolute Maximum Ratings
Electrical Characteristics
Design Specifications
TX SPECIFICATIONS
RX SPECIFICATIONS
Parameters
Value
Unit
Supply voltage
3.0 + 10%
V
Storage temperature
-40 to 85
o
C
Parameter
Min
Typ
Max
Unit
Remarks
Note
Power supply voltage (Vcc)
2.7
3.0
3.3
V
Power supply current (Rx):
18.7
mA
Power supply current (Tx):
- High power (16dBm) mode:
- Low power (9dBm) mode:
31.6
19.8
mA
mA
Power supply current
(RFVCO):
17.4
mA
Parameter
Min
Typ
Max
Unit
Remarks
Note
General
RF Frequency
2400
2442
2484
MHz
RF Output Power
High Power Mode
Low Power Mode
16
9
dBm
dBm
DC Current
High Power Mode
Low Power Mode
31.6
19.8
mA
mA
Parameter
Min
Typ
Max
Unit
Remarks
Note
General
RF Frequency
2400
2442
2484
MHz
IF Frequency
260
MHz
Current Consumption
11.4
18.7
23.4
mA
Input 1dB Compression Point
-23.8
dBm
IIP3
-19.7
dBm
RF Sensitivity
-91
dBm
RSSI Sensitivity
-91
dBm
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