Ac electrical characteristics (continued) – Rainbow Electronics MAX3541 User Manual
Page 4
MAX3541
Complete Single-Conversion
Television Tuner
4
_______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX3541 EV kit, V
CC
= +3.1V to +3.5V, T
A
= -40°C to +85°C, 75Ω system impedance, default register settings, V
RFAGC
= V
IFAGC
=
+3V (minimum attenuation), unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum gain setting
(V
IFAGC
= 3V)
54
59
63
Passband Voltage Gain
S our ce l oad =
1.1k
Ω,
output load = 1k
Ω
Minimum gain setting
(V
IFAGC
= 0.5V)
21
dB
Passband Gain Flatness
32MHz to 40MHz (Note 1)
1.2
dB
Output Voltage
V
IFAGC
= 3V (Note 1)
2.5
V
P-P
AGC Gain Slope
V
IFAGC
= 3V to 0.5V (Note 1)
27
dB/V
Equivalent Input Voltage Noise Density
At 36MHz, maximum gain (V
IFAGC
= 3V)
(Note 1)
7.3
nV/
√Hz
Noise Figure Change vs. Attenuation
< 0.35
dB/dB
IM3
V
OUT
= 1V
P-P
, 40dB < gain < 60dB (Note 1)
-56
dBc
IF OVERLOAD DETECTOR (See the IF Overload Detector Section)
Output Overload Attack Point
0.7
V
P-P
Attack Point Accuracy
OD REG = 3
±1
dB
Detector Output Voltage Range
Negative polarity, overload reduces V
DET
(open collector, 0.3mA sink)
0.5
3.0
V
Detector Gain
70
V/V
FREQUENCY SYNTHESIZER
REFERENCE OSCILLATOR
Frequency
8
MHz
DIVIDERS
RF N-Divider Ratio
256
32,767
RF R-Divider Ratio
16
127
LO PHASE DETECTOR AND CHARGE PUMP
Comparison Frequency
63
250
kHz
CP = 00
0.5
CP = 01
1
CP = 10
1.5
Charge-Pump Current
CP = 11
2
mA
Charge-Pump Three-State Current
±5
nA
Charge-Pump Compliance Range
0.4
V
CC
-
0.4
V
Charge-Pump Current Matching
5
%
LOCAL OSCILLATOR
VCO Tuning Range
Tank frequency
2200
4400
MHz
VCO Tuning Gain
Tank oscillator gain
500
MHz/V
2-WIRE SERIAL INTERFACE
Clock Frequency
400
kHz
Note 1: Guaranteed by design and characterization.