SA2400A Datasheet, PDF (11/34 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
Specification
Conditions
Min
Typ
Max
Units
LO leakage to antenna
All gain modes. Incl balun
–
–75
–57
dBm
Residual sideband Rejection
Measured with single tone at 2 MHz offset from
22
29
–
dB
carrier. Includes both IQ gain and phase error.
Notes 3, 7.
Ripple band width of filter
Note 4.
5.6
6.3
7.0
MHz
3 dB band width of filter
Indicative, not tested. Note 4.
–
7
–
MHz
In-band amplitude ripple
DC to ripple band width edge. Note 3.
–
–
0.6
dB peak
Out-of-band attenuation
Relative to minimum in-band gain
> 11 MHz
> 22 MHz
25
–
–
dB
55
–
–
dB
Lower 3 dB cut-off frequency of AC Cascade of two 1st order high-pass filters.
coupling
a) NARROW BAND
–
10
–
kHz
b) INTERMEDIATE BAND
–
100
–
kHz
c) WIDE BAND
–
1000 –
kHz
Output load resistance
Pin to GND, differential. Note 5.
15
–
–
kΩ
Output load capacitance
Pin to GND
–
–
6
pF
Nominal I & Q output voltage
Differential at the load specified. Note 6.
–
0.5
–
V peak
Maximum I & Q output voltage
Saturated, differential
–
–
1.5
V peak
Common mode IQ voltage
Programmable (see 0x04)
Mode 1
Mode 2
V_CC/2–0.25 V_CC/2 V_CC/2+0.25 V
1.0
1.25 1.5
V
1 dB compression level at output
1 MHz tone, differential. Maximum gain.
1
–
–
V peak
Total Harmonic Distortion
Input 1 – 5 MHz signal, 1 V peak differential
–
2
4
%
(measured at max and min gains)
sinusoidal at output, output spurs measured
differential up to 100 MHz. Ratio of rms total
spurious distortion to rms fundamental.
Receiver in minimum gain. Note 3.
Receiver in maximum gain. Note 3.
–
5
10
%
Phase Imbalance
Signal tone input at 2 MHz offset from carrier.
–
4
–
deg
Indicative, not tested.
I, /I to Q, /Q amplitude imbalance
ratio of signal at I pin to /I pin;
Same for Q and /Q pins.
–
0.1
–
dB
RSSI voltage in settled state
(internal AGC)
Corresponds to I, Q output signal levels when
1.25
1.55 1.95
V
AGC_RESET is used, with RF input
between –10 and –80 dBm.
1 MHz tone, 0.5 V peak differential.
ACGTARGET = 0
RSSI voltage difference
1 dB change in input power compared to
settled state
–
64.5 –
mV
RSSI minimum voltage
Signal power = –10 dBc
–
0.9
–
V
RSSI maximum output voltage
Signal power = +10 dBc
–
2.2
–
V
RSSI error
–10 dBc < signal power < +10 dBc
–
±1
–
dB
NOTES:
1. Corresponds to –15 dBm input level at IC input, assuming typical 5 dB loss from the antenna to the IC input. The AGCTARGET register
should be set to “+5” which causes the AGC to settle to an output amplitude greater than the specified nominal value. A resistive divider
network at the output can be used to adjust the actual IQ output levels to the BB ADC range.
2. Guaranteed by design.
3. Verified by bench characterization and found to have sufficient margin for production.
4. At power-up time, the filter bandwidth is undefined. It needs to be calibrated with the internal tuner (FCALIB mode).
5. For unsymmetrical loading, attach the same load impedance to the unused pin; condition: for 80% of nominal output voltage swing.
6. Nominal I/Q output levels are understood as the levels the SA2400A will settle to after an AGCRESET action is performed with an RF input
signal modulated by a Barker sequence, and with AGCTARGET = 0.
7. RSB = 20*log(sqrt([1+K² + 2Kcosϕ]/[1+K² – 2Kcosϕ])), where K = linear gain imbalance, and ϕ = phase imbalance.
2002 Nov 04
11