SA2400A Datasheet, PDF (13/34 Pages) NXP Semiconductors – Single chip transceiver for 2.45 GHz ISM band

Philips Semiconductors
Single chip transceiver for 2.45 GHz ISM band
Product data
SA2400A
10. SA2400A TRANSMITTER
The IQ baseband input signal used is 11 Msymbols/sec QPSK with pulse shaping and 44 MHz D/A sampling rate. The source EVM is less than
3%. The LO frequency is the same as the Transmitter channel center frequency, as the transmit IF input is at 0 Hz.
Table 8. SA2400A Transmitter properties
T_amb = 25 °C; V_CC = 3.3 V.
Specification
Conditions
Min
Typ
RF output frequency
Typical
2.4
–
RF output power incl balun,
for a CCK modulated signal
Output1, maximum
Output2, maximum
4.5
8.0
–5
–1.5
Gain step size
Output1 and Output2
–
1
# gain steps
Output1 and Output2
–
15
Spectral Mask (Output1)
Note 1.
–11 to + 11 MHz, 100 kHz band
–22 to –11 and 11 to 22 MHz, 100 kHz band
< –22, > 22 MHz, 100 kHz band
–
–
–
–40
–
–60
Spectral Mask (Output2)
Note 1.
–11 to + 11 MHz, 100 kHz band
–22 to –11 and 11 to 22 MHz, 100 kHz band
< –22, > 22 MHz, 100 kHz band
–
–
–
–
–
–
Power ramping up time
10% to 90% ramp up. Note 2.
–
0.5
Power ramping up delay
From programming to TRANSMIT mode (TXRX mode, or 0-to-1
–
2
(Note 3)
change of TX/RX pin). Note 2.
Power ramping down
Note 2.
a) 90% to 10% ramp down
b) 10% to carrier leakage level
–
0.5
–
0.5
Carrier Leakage
Analog input mode selected. No signal input, only quiescent current.
a) Uncalibrated
–
–
b) Calibrated
–
–40
Digital input mode selected.
–
–40
Carrier Leakage Adjustment Adjustment range of input current offset
–10
–
Residual Sideband Rejection Includes both IQ phase and gain imbalance
22
–
Error Vector Magnitude
11 Msymbols/s QPSK. Both RF outputs. Measured with maximum –
12
gain. Note 2.
RX to TX switching time
Note 2.
a) Output power within 1 dB of final value. Includes 2.5 µs for
–
3
power-up delay and ramping.
b) Frequency step settles to within 25 ppm of final value
–
3
IQ filter bandwidth
Upper 3 dB cut off frequency, after calibration. Note 2.
9.25
9.75
In-band IQ Common Mode 1–6 MHz common mode signal at –30 dBc relative to IQ differential 30
–
Rejection Ratio
signal. Measured at upconverted transmitter output. Note 2.
Out-of-band IQ Common
22–100 MHz common mode signal at –10 dBc relative to IQ
40
–
Mode Rejection Ratio
differential signal. Measured at upconverted transmitter output
relative to in-band 1 MHz tone. Note 2.
IQ input signal current range Into each arm of differential inputs that sink current to ground.
Analog input selected. Note 4.
50
–
IQ input quiescent current
Into each arm of differential inputs that sink current to ground.
–
300
Analog input selected.
Resulting I/Q bias voltage
With 300 µA quiescent current into each arm of differential inputs. 0.6
0.7
Analog input selected.
IQ AC input impedance
Analog input selected.
–
320
IQ input voltage
Digital input selected
Logic LOW
–
–
Logic HIGH
0.8V_DD –
Max
Units
2.5
GHz
–
dBm
–
dBm
–
dB
–
0
dBc
–36
dBc
–56
dBc
0
dBc
–30
dBc
–50
dBc
–
µs
–
µs
–
µs
–
µs
–25
dBc
–30
dBc
–28
dBc
+10
µA
–
dB
14
%
3.5
3.5
10.25
–
–
µs
µs
MHz
dB
dB
550
µA
–
µA
0.8
V
–
Ω
0.2V_DD V
–
V
2002 Nov 04
13