TRF371135 Datasheet, PDF (6/54 Pages) Texas Instruments – INTEGRATED IQ DEMODULATOR

TRF371135
SLWS220A – FEBRUARY 2010 – REVISED MARCH 2010
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ELECTRICAL CHARACTERISTICS
V_CC = 5 V, LO power = 0 dBm, T_A = 25°C (unless otherwise noted)
PARAMETERS
TEST CONDITIONS
MIN TYP
MAX UNIT
DC PARAMETERS
I_CC
Total supply current
Power-down current
370
mA
2
mA
IQ DEMODULATOR AND BASEBAND SECTION
f_RF
Frequency range
Gain range
Gain step
See ⁽¹⁾
1700
22
24
1
6000
MHz
dB
dB
Pin_max
OIP3
P1dB_min
f_min
Max. RF power input
Output third-order intercept point
Min. output compression point
Min. baseband low-pass filter cutoff
frequency
Before damage
Gain setting = 24⁽²⁾
1 tone⁽³⁾
1-dB point⁽⁴⁾
25
dBm
30
dBV_RMS
3
dBV_RMS
700
kHz
f_max
Max. baseband low-pass filter cutoff
frequency
3-dB point⁽⁴⁾
15
MHz
f_bypass
Baseband low-pass filter cutoff frequency in
bypass mode
3-dB point⁽⁵⁾
30
MHz
1 × f_C
1.5 × f_C
F_sel
Baseband relative attenuation at LPF cutoff ^{2 × f}C
frequency (f_C)⁽⁶⁾
3 × f_C
4 × f_C
5 × f_C
Image suppression
f_LO = 3550 MHz
Output BB attenuator
1
8
32
dB
54
75
90
–35
dB
3
dB
Output load impedance
Parallel resistance
Parallel capacitance
1
kΩ
20
pF
Vcm
Output, common-mode
Baseband harmonic level
Measured at I- and Q-channel
baseband outputs
Second harmonic⁽⁷⁾
Third harmonic⁽⁷⁾
1.5
V
–95
dBc
–103
dBc
LOCAL OSCILLATOR PARAMETERS
Local oscillator frequency
LO input level
See ⁽⁸⁾
1700
–3
0
6000
6
MHz
dBm
LO leakage
At MIXinn/p at 0-dBm LO drive level
–58
dBm
DIGITAL INTERFACE
V_IH
High-level input voltage
V_IL
Low-level input voltage
V_OH
High-level output voltage
V_OL
Low-level output voltage
0.6 × V_CC
0
0.8 × V_CC
5
V_CC
V
0.8 V
V
0.2 × V_CC
V
(1) Two consecutive gain settings
(2) Two CW tones at an offset from LO frequency smaller than the baseband-filter cutoff frequency. Performance is set by baseband
circuitry regardless of LO frequency.
(3) Single CW tone at an offset from LO frequency smaller than the baseband-filter cutoff frequency. Performance is set by baseband
circuitry regardless of LO frequency.
(4) Baseband low-pass filter cutoff frequency is programmable through SPI register LPFADJ. LPFADJ = 0 corresponds to maximum
bandwidth; LPFADJ = 255 corresponds to minimum BW.
(5) Filter Ctrl setting equal to 0
(6) Attenuation relative to passband gain
(7) LO frequency set to 3.55 GHz. I or Q output power level –6 dBV_RMS differential. Gain setting at 24. DC offset calibration engaged. Input
signal set at 1-MHz offset.
(8) LO power outside of this range is possible but may introduce degraded performance.
6
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