MAX2310_07 Datasheet, PDF (6/22 Pages) Maxim Integrated Products – CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer

CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
Typical Operating Characteristics (continued)
(MAX2310/MAX2314 or MAX2312/MAX2316 EV kit, V_CC = +2.75V, registers set to default power-up states, f_IN = 210.88MHz for
CDMA, f_IN = 85.88MHz for FM, f_REF = 19.68MHz, synthesizer locked with passive 2nd-order lead-lag loop filter, SHDN = high, VGC
set for +35dB voltage gain, differential output load = 10kΩ, all power levels referred to 50Ω, T_A = +25°C, unless otherwise noted.)
FM PORT
S11 vs. FREQUENCY
TANKL PORT
1/S11 vs. FREQUENCY
TANKH PORT
1/S11 vs. FREQUENCY
1
2
4
3
1: 641 - j428 10MHz
2: 27 - j162 85MHz
3: 4 - j73 210MHz
4: 1.8 - j39 600MHz
LOOUT PORT
S22 vs. FREQUENCY
4
4
3
3
2
2
1
1
1: -3.06ms + j349μs, 100MHz
2: -3.01ms + j853μs, 160MHz
3: -3.11ms + j1.45ms, 240MHz
4: -3.04ms + j1.85ms, 300MHz
CDMA PORT
S11 vs. FREQUENCY
1: 1.98ms + j437µs, 100MHz
2: 2.18ms + j853µs, 160MHz
3: 2.11ms +j 2.53ms, 420MHz
4: 2.17ms +j 3.71ms, 600MHz
1: 108.63Ω (Re)
10.266Ω (1m)
40MHz
2: 134.99Ω (Re)
13.71Ω (1m)
150MHz
3: 158.83Ω (Re)
39.58Ω (1m)
300MHz
PIN
MAX2310 MAX2312 MAX2314 MAX2316
NAME
1
1
1, 8
1
BYP
2
2
2
2
CP_OUT
3
3
3
3
GND
4, 5
—
4, 5
5, 6
TANKL+,
TANKL-
—
4
—
4
DIVSEL
1
2
3
4
1: 10MHz, 375Ω - j56Ω
2: 85MHz, 285Ω - j200Ω
3: 210MHz, 73Ω - j169Ω
4: 600MHz, 2.1Ω - j34Ω
Pin Description
FUNCTION
Bypass Node. Must be capacitively decoupled (bypassed)
to analog ground.
Charge-Pump Output
Analog Ground Reference
Differential Tank Input for Low-Frequency Oscillator
High selects M1/R1; low selects M2/R2.
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