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TRF3702 Datasheet(PDF) 6 Page - Texas Instruments

Part No. TRF3702
Description  1.5-GHz to 2.5-GHz QUADRATURE MODULATOR
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TRF3702 Datasheet(HTML) 6 Page - Texas Instruments

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RF OUTPUT PERFORMANCE
THERMAL CHARACTERISTICS
DEFINITIONS OF SELECTED SPECIFICATIONS
Unadjusted Carrier Suppression
Adjusted (Optimized) Carrier Suppression
TRF3702
SLWS149A – SEPTEMBER 2004 – REVISED AUGUST 2006
Over recommended operating conditions, VCC = 5 V, VCM = 3.7 V, f
LO = 2.1 GHz at 0 dBm (unless otherwise specified)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Single and Two-Tone Specifications
Output power
–5
–3
dBm
Second baseband harmonic
–50
–42
dBc
(USB or LSB)(2)
I, Q(1) = 1 Vp-p, fBB = 928 kHz
Third baseband harmonic
–60
–51
dBc
(USB or LSB)(2)
I, Q(1) = 1 Vp-p, fBB = 928 kHz (two-tone signal,
IMD3
–55
–47
dBc
fBB1 = 928 kHz, fBB2 = 992 kHz)
P1dB (output compression
7
dBm
point)
NSD
Noise spectral density
60-MHz offset from carrier, Pout = 0 dBm, over temperature
–151
–148.5(3) dBm/Hz
WCDMA ACPR
Single carrier, channel power = –14 dBm
71
dBc
RFOUT pin impedance(4)
35 + j27
I, Q(1) = 1 Vp-p, fBB = 928 kHz, unadjusted
30
Carrier suppression
I, Q(1) = 1 Vp-p, fBB = 928 kHz, optimized
55
dBc
I, Q(1) = 1 Vp-p, fBB = 928 kHz, over temperature(5)
47
I, Q(1) = 1 Vp-p, fBB = 928 kHz, unadjusted
37
Sideband suppression
I, Q(1) = 1 Vp-p, fBB = 928 kHz, optimized
55
dBc
I, Q(1) = 1 Vp-p, fBB = 928 kHz, over temperature(5)
47
(1)
I , Q = 1 Vp-p implies that the magnitude of the signal at each input pin IVIN, IREF, QVIN, QREF is equal to 500 mVp-p.
(2)
USB = upper sideband. LSB = lower sideband.
(3)
Maximum noise values are assured by statistical characterization only, not production testing. The values specified are over the entire
temperature range, TA = –40°C to 85°C.
(4)
For a listing of impedances at various frequencies, see Table 1.
(5)
After optimization at room temperature. See the Definitions of Selected Specifications section.
PARAMETER
CONDITION
NOM
UNIT
RθJA Thermal resistace, junction to ambient
Soldered pad using four-layer JEDEC board with four thermal vias
42.8
°C/W
RθJM Thermal resistace, junction to mounting
24.8
°C/W
surface
RθJC Thermal resistace, junction to case
Soldered pad using two-layer JEDEC board with four thermal vias
67.6
°C/W
This specification measures the amount by which the local oscillator component is attenuated in the output
spectrum of the modulator relative to the carrier. It is assumed that the baseband inputs delivered to the pins of
the TRF3702 are perfectly matched to have the same dc offset (VCM). This includes all four baseband inputs:
IVIN, QVIN, IREF and QREF. Unadjusted carrier suppression is measured in dBc.
This differs from the unadjusted suppression number in that the dc offsets of the baseband inputs are iteratively
adjusted around their theoretical value of VCM to yield the maximum suppression of the LO component in the
output spectrum. Adjusted carrier suppression is measured in dBc.
6
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