MAX2460 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX2460 Datasheet PDF : 14 Pages
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900MHz Image-Reject Transceivers
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX242X/246X EV kit, VCC = +3.3V; fLO = 925.7MHz (MAX2420), fLO = 961MHz (MAX2421), fLO = 985MHz (MAX2422),
fLO = 904.3MHz (MAX2460); fLO = 805MHz (MAX2463); fRXIN = 915MHz; PRXIN = -35dBm; PTXIN = -15dBm (330Ω); LNAGAIN = 2V;
TXGAIN = VCC; VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; TA = +25°C; unless otherwise noted.)
PARAMETER
Output 1dB Compression
Output Third-Order Intercept
(Note 11)
LO to TXOUT Suppression
(Note 12)
Noise Figure
TXGAIN Control Slope (Note 13)
Gain Control Range (Note 13)
Transmitter Turn-On Time (Note 14)
OSCILLATOR AND PRESCALER
Oscillator Frequency Range
(Notes 6, 15)
Oscillator Phase Noise
Oscillator Pulling
Prescaler Output Level
Oscillator Buffer Output Level
(Note 6)
Required Modulus Setup Time
(Note 6)
CONDITIONS
1V ≤ TXGAIN ≤ 2V
10kHz offset (Note 16)
Standby to TX, or standby to RX
RX to TX with PRXIN = -45dBm (RX mode) to
PRXIN = 0dBm (TX mode) (Note 17)
ZL = 100kΩ | | 10pF
DIV1 = 2.4V, ZL = 50Ω, TA = +25°C
DIV1 = 2.4V, ZL = 50Ω, TA = TMIN to TMAX
Divide-by-64/65 mode (Note 18)
MIN
TYP MAX UNITS
2
dBm
11
dBm
34
dBc
23
dB
33
dB/V
36
dB
400
ns
690
1100 MHz
82
dBc/Hz
8
kHz
70
500
-11
-8
-12
mVP-P
dBm
10
ns
Required Modulus Hold Time
(Note 6)
Divide-by-64/65 mode (Note 18)
0
ns
Note 6: Guaranteed by design and characterization.
Note 7: Image rejection typically falls to 30dBc at the frequency extremes.
Note 8: Refer to the Typical Operating Characteristics for plots showing receiver gain vs. LNAGAIN voltage, input IP3 vs.
LNAGAIN voltage, and noise figure vs. LNAGAIN voltage.
Note 9: Two tones at PRXIN = -45dBm each, f1 = 915.0MHz and f2 = 915.2MHz.
Note 10: Time delay from RXON = 0.45V to RXON = 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 11: Two tones at PTXIN = -21dBm each (330Ω), f1 = 10.6MHz, f2 = 10.8MHz (MAX2420/MAX2460), f1 = 45.9MHz,
f2 = 46.1MHz (MAX2421), f1 = 69.9MHz, f2 = 70.1MHz (MAX2422).
Note 12: Refer to the Typical Operating Characteristics for statistical data.
Note 13: Refer to the Typical Operating Characteristics for a plot showing transmitter gain vs. TXGAIN voltage.
Note 14: Time delay from TXON = 0.45V to TXON = 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 15: Refers to useable operating range. Tuning range of any given tank circuit design is typically much narrower (refer to Figure 2).
Note 16: Using tank components L3 = 5.0nH (Coilcraft A02T), C2 = C3 = C26 = 3.3pF, R6 = R7 = 10Ω.
Note 17: This approximates a typical application in which TXOUT is followed by an external PA and a T/R switch with finite isolation.
Note 18: Relative to the rising edge of PREOUT.
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