Datasheet

(Typical Operating Circuit, 50Ω system impedance, V
AVDD
= V
DVDD
= V
PAVDD
= +2.1V to +3.6V, f
RF
= 315MHz or 390MHz,
T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
PAVDD
= +2.7V, T
A
= +25°C, unless otherwise
noted. All min and max values are 100% tested at T
A
= +125°C, and guaranteed by design and characterization over temperature,
unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL CHARACTERISTICS
Frequency Range 300 315/390 450 MHz
Power-On Time t
ON
ENABLE transition low-to-high, frequency
settled to within 50kHz of the desired carrier
110
µs
ENABLE transition low-to-high, frequency
settled to within 5kHz of the desired carrier
250
Maximum Data Rate
Manchester encoded 50
kbps
Nonreturn to zero (NRZ) 100
Frequency Switching Time
Time from low-to-high or high-to-low
transition of FSEL to frequency settled to
within 5kHz of the desired carrier
30 µs
PHASE-LOCKED LOOP (PLL)
VCO Gain KVCO 320 MHz/V
PLL Phase Noise
f
RF
= 315MHz
10kHz offset -87
dBc/Hz
1MHz offset -98
f
RF
= 390MHz
10kHz offset -84
1MHz offset -98
Loop Bandwidth 600 kHz
Reference Frequency Input Level 500 mV
P-P
Frequency-Divider Range 21 26
CRYSTAL OSCILLATOR
Crystal Frequency f
XTAL
15 MHz
Frequency Pulling by V
DD
4 ppm/V
Crystal Load Capacitance (Note 4) 10 pF
www.maximintegrated.com
Maxim Integrated │ 3
MAX7058 315MHz/390MHz Dual-Frequency ASK Transmitter
AC Electrical Characteristics