Rainbow Electronics MAX3580 - Manual (Page 5)

MAX3580
Direct-Conversion TV Tuner
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AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3580 EV kit, V CC = +3.1V to +3.5V, GND = 0V. RF_AGC = BB_AGC = +2.85V, RF input terminated into a 75Ω load, BBI_ and
BBQ_ loaded by R L greater than 2kΩ and C L less than 10pF, VCO active, registers are set according to the recommended default
register conditions, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V CC = +3.3V, T A = +25°C, unless otherwise
noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
At 5.25MHz (UHF mode) 23
At 4.75MHz (VHF mode) 23
At 13.25MHz (UHF mode) 63
At 11.75MHz (VHF mode) 62
Rejection Ratio
At > 16.2MHz 84
dB
DC Output Voltage V CM Common mode (Note 11) 0.485 x V CC V DC
Output DC Offset BB_AGC = 2.85V -70 +70 mV
Baseband Highpass Cutoff Programmable 20 to 200 Hz
AGC Gain Slope BB_AGC = 0.5V to 2.85V 14 35 dB/V
Ratio of Passband to Stopband
Noise BB_AGC = 2.85V, 10kHz to 3.8MHz vs.
16.2MHz to 23.8MHz
15 dB
MIXER OVERLOAD DETECTOR (RSSI)
Attack-Point Accuracy 5.25MHz test tone ±1 dB
Attack-Point Increment 3-bit DAC 1.5 dB
Detector on, V OUT = 0.5V 0.3 mA
Detector Output Sink
Detector off, V OUT = 2.85V 5 µA
Detector Gain 30 V/V
Detector Response Time < 200 µs
2-WIRE INTERFACE
Clock Rate 400 kHz
Note 1: Min and Max limits are guaranteed by test above T
A
= +25°C and are guaranteed by design and characterization at
T A = -40°C. The default register settings are not production tested. Load registers no sooner than 100µs after power-up.
Note 2: The specified overall voltage gain is suitable to amplify -93dBm to -20dBm to 1V P-P at the baseband output.
Note 3: Guaranteed by design characterization over the specified operating conditions. Not production tested.
Note 4: BB_AGC adjusted for gain = 72dB with RF_AGC at 2.85V.
Note 5: Two tones at a) 230MHz and 431MHz with IM measured at 201MHz and b) 230MHz and 701MHz with IM measured at
471MHz.
Note 6: Two tones at 499MHz and 689MHz with IM measured at 879MHz.
Note 7: IM3 measured with two tones within the adjacent channel. Production tested at 72dB of gain with two tones at a)
205.75MHz and 210.5MHz with IM measured at 201MHz and b) 475.25MHz and 479.5MHz with IM measured at
471MHz. Production tested at 49dB of gain with two tones at 475.25MHz and 479.5MHz with IM measured at 471MHz.
Note 8: Measured at RF = 171MHz with harmonics at 511MHz (3rd harmonic) and 851MHz (5th harmonic).
Note 9: Delay of 2ns equal 2.74° phase error.
Note 10: UHF rolloff of 4dB in addition to gain flatness specification.
Note 11: Production tested at V
CC = +3.5V to limits of 1.7V ±0.1V.