LTC5588-1_15 Datasheet, PDF (5/30 Pages) Linear Technology – 200MHz to 6000MHz Quadrature Modulator with Ultrahigh OIP3

LTC5588-1
ELECTRICAL CHARACTERISTICS V_CC = 3.3V, EN = 3.3V, T_A = 25°C, LOP AC-terminated with 50Ω to ground,
BBPI, BBMI, BBPQ, BBMQ common mode DC voltage V_CMBB = 0.5V_DC, I and Q baseband input signal = 100kHz CW, 1V_P-P(DIFF) each, I
and Q 90° shifted, lower sideband selection, LINOPT pin floating, unless otherwise noted. Test circuit is shown in Figure 8.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
OP1dB
OIP2
OIP3
NFloor
Output 1dB Compression
Output 2nd-Order Intercept
Output 3rd-Order Intercept
RF Output Noise Floor
(Notes 4, 5)
(Notes 4, 6)
No Baseband AC Input Signal (Note 3)
1.9
35.4
17.9
–156.7
dBm
dBm
dBm
dBm/Hz
IR
Image Rejection
(Note 7)
–32.3
dBc
LOFT
Carrier Leakage (LO Feedthrough) (Note 7)
–30.2
dBm
Baseband Inputs (BBPI, BBMI, BBPQ, BBMQ)
BW_BB
Baseband Bandwidth
–1dB Bandwidth, R_SOURCE = 25Ω, Single Ended
430
MHz
I_b(BB)
Baseband Input Current
Single Ended
–136
μA
R_IN(SE)
Input Resistance
Single Ended
–3
kΩ
V_CMBB
DC Common Mode Voltage
Externally Applied
0.5
V
V_SWING Amplitude Swing
No Hard Clipping, Single Ended
0.86
V_P-P
Power Supply (V_CC1, V_CC2)
V_CC
Supply Voltage
3.15
3.3
3.45
V
I_CC(ON)
Supply Current
EN = High
275
303
325
mA
I_CC(OFF) Supply Current, Sleep Mode
EN = 0V
33
900
μA
t_ON
Turn-On Time
EN = Low to High (Notes 8, 13)
17
ns
t_OFF
Turn-Off Time
EN = High to Low (Notes 9, 13)
10
ns
t_ON(IR)
Image Rejection Settling
EN = Low to High, <–60dBc (Note 13)
80
ns
t_ON(LO)
LO Suppression Settling
EN = Low to High, <–60dBm (Note 13)
85
ns
t_ON(PHASE) Phase Settling
EN = Low to High, Phase < 0.5°, f_LOM = f_RF = 2.14GHz,
70
ns
Constant Board Temperature
V_LINOPT(ON) LINOPT Voltage
V_LINOPT(OFF) LINOPT Voltage, Sleep Mode
Enable Pin
Floating LINOPT Pin, EN = High
Floating LINOPT Pin, EN = Low
2.56
V
3.3
V
Enable
Input High Voltage
Input High Current
EN = High
EN = 3.3V
2
V
80
nA
Sleep
Input Low Voltage
Input Low Current
Temperature Sensor (Thermistor) (Note 14)
EN = Low
EN = 0V
1
V
33
μA
R_T
Thermistor Resistance
Temperature Slope
EN = Low, I_RT = 100μA
EN = Low, I_RT = 100μA
1.385
kΩ
11
Ω/°C
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC5588-1 is guaranteed functional over the operating
temperature range from –40°C to 85°C.
Note 3: At 6MHz offset from the LO signal frequency. 100nF between BBPI
and BBMI, 100nF between BBPQ and BBMQ.
Note 4: Baseband inputs are driven with 4.5MHz and 5.5MHz tones.
Note 5: IM2 is measured at f_LO – 10MHz.
Note 6: IM3 is measured at f_LO – 3.5MHz and f_LO – 6.5MHz.
OIP3 = lowest of (1.5 • P{f_LO-5.5MHz} – 0.5 • P{f_LO-6.5MHz})
and (1.5 • P{f_LO-4.5MHz} – 0.5 • P{f_LO-3.5MHz}).
Note 7: Without image or LO feedthrough nulling (unadjusted).
Note 8: RF power is within 10% of final value.
Note 9: RF power is at least 30dB down from its ON state.
Note 10: RF matching center frequency is set below band center
frequency in order to align RF passband center frequency with band center
frequency.
Note 11: An external voltage is optimally set at the LINOPT pin for best
output 3rd-order intercept.
Note 12: I and Q baseband Input signal = 10MHz CW, 0.8V_{P-P, DIFF} each,
I and Q 0° shifted.
Note 13: f_LOM = 2.14GHz, P_LOM = 0dBm, f_BB = 134MHz; LO feedthrough
and image rejection is nulled during previous EN = high cycles, C5 = C6 =
10pF; C13 = 0; Extra 680μF capacitors (SANYO 6SEPC680M) from TP1 to
ground and TP2 to ground, RF noise filter with 93MHz bandwidth is used.
Note 14: Thermistor performance is guaranteed by Design.
55881fb
5