MAX1471
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(
Typical Application Circuit
, V
AVDD
= V
DVDD
= V
HVIN
= +2.4V to +3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to +125°C, unless other-
wise noted. Typical values are at V
AVDD
= V
DVDD
= V
HVIN
= +3.0V, f
RF
= 434 MHz, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ANALOG BASEBAND
Maximum Data Filter Bandwidth BW
DF
50 kHz
Maximum Data Slicer Bandwidth BW
DS
100 kHz
Maximum Peak Detector
Bandwidth
BW
PD
50 kHz
Manchester coded 33
Maximum Data Rate
Nonreturn to zero (NRZ) 66
kbps
CRYSTAL OSCILLATOR
Crystal Frequency f
XTAL
9.04 13.728 MHz
Frequency Pulling by V
DD
3 ppm/V
Crystal Load Capacitance 3pF
DIGITAL INTERFACE TIMING (see Figure 8)
Minimum SCLK Setup to Falling
Edge of CS
t
SC
30 ns
Minimum CS Falling Edge to
SCLK Rising-Edge Setup Time
t
CSS
30 ns
Minimum CS Idle Time t
CSI
125 ns
Minimum CS Period t
CS
2.125 µs
Maximum SCLK Falling Edge to
Data Valid Delay
t
DO
80 ns
Minimum Data Valid to SCLK
Rising-Edge Setup Time
t
DS
30 ns
Minimum Data Valid to SCLK
Rising-Edge Hold Time
t
DH
30 ns
Minimum SCLK High Pulse Width t
CH
100 ns
Minimum SCLK Low Pulse Width t
CL
100 ns
Minimum CS Rising Edge to
SCLK Rising-Edge Hold Time
t
CSH
30 ns
Maximum CS Falling Edge to
Output Enable Time
t
DV
25 ns
Maximum CS Rising Edge to
Output Disable Time
t
TR
25 ns
Note 1: Production tested at T
A
= +85°C. Guaranteed by design and characterization over entire temperature range.
Note 2: Guaranteed by design and characterization. Not production tested.
Note 3: The oscillator register (0x3) is set to the nearest integer result of f
XTAL
/ 100kHz (see the
Oscillator Frequency Register
section).
Note 4: Input impedance is measured at the LNAIN pin. Note that the impedance at 315MHz includes the 15nH inductive degeneration
from the LNA source to ground. The impedance at 434MHz includes a 10nH inductive degeneration connected from the LNA
source to ground. The equivalent input circuit is 50Ω in series with 2.2pF. The voltage conversion gain is measured with the
LNA input matching inductor, the degeneration inductor, and the LNA/mixer resonator in place, and does not include the IF fil-
ter insertion loss.
