MAX2903 查看數據表（PDF） - Unspecified

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MAX2903

200mW Single-Chip Transmitter ICs for 868MHz/915MHz ISM Bands

Unspecified 

200mW Single-Chip Transmitter ICs for

868MHz/915MHz ISM Bands

AC ELECTRICAL CHARACTERISTICS (continued)

(MAX290_ EV kits. VCC = +2.7V to +4.5V, RRLPF = 68kΩ, RPWRSET = 22kΩ, fRF = 917.28MHz (MAX2900/MAX2901/MAX2902) or fRF

= 868MHz (MAX2903/MAX2904), VASK = VREG, fREF = 14.56MHz (MAX2900/MAX2901/MAX2902) or fREF = 13.62MHz

(MAX2903/MAX2904), chip rate on MODIN = 1.22Mbps, POUT = +23dBm, TA = -40°C to +85°C. Typical values are at VCC = +4.5V,

TA = +25°C, unless otherwise noted.) (Note 1)

PARAMETER

RF Output Power

RF Output Power Flatness

Adjacent Channel Power Ratio

Alternate Channel Power Ratio

OOK Control Range

ASK Output Power Adjustment

Range

RFOUT Rise and Fall Time

Spurious Emissions

CONDITIONS

MIN -3σ TYP +3σ MAX UNITS

PWRSET = 22kΩ, VCC = +4.5V,

TA = +25°C

PWRSET = 22kΩ, VCC = +4.5V,

TA = -40°C to +85°C

PWRSET = 22kΩ, VCC = +3.0V, TA = +25°C

fRF = 900MHz to 930MHz

(MAX2900/MAX2901/MAX2902)

fRF = 867MHz to 870MHz

PN sequence at 1.22MHz

PN sequence at 1.22MHz

21 23.5 25

20.5

25

18

20

21

0.3

0.1

-17

-26

40

80

d Bm

dB

d Bc

d Bc

dB

OOKIN = high,

ASK output power back- VASK = 0

41

off relative to max power OOKIN = high,

VASK = 1V

16

dB

Square-wave signal applied on OOK

1

µs

At 2nd harmonic of RF output frequency

-50

with external matching network

At 3rd harmonic of RF output frequency

-51

with external matching network

At 4th harmonic of RF output frequency

with external matching network

-63

d Bc

Out of 902MHz to 928MHz band other than

harmonics with external matching network

< -70

(MAX2900/MAX2901/MAX2902)

Out of 867MHz to 870MHz band other than

harmonics with external matching network

(MAX2903/MAX2904)

< -70

Unlocked, Out-of-Band Spurious Any condition when synthesizer unlocked

Output Level

(pin LD low)

< -50

d Bm

Noise Level Out of Band

Modulation off, measured at 960MHz, any

gain setting (MAX2900/MAX2901/MAX2902)

Modulation off, measured at 900MHz, any

gain setting (MAX2903/MAX2904)

-126

-126

-120

-120

d Bm /H z

Output VSWR for Guaranteed

2:1

Stability

Maximum Allowable Output VSWR

2:1

Note 1: Devices are production tested at TA = +25°C and +85°C. Min/Max values are guaranteed by design and characterization

over temperature and supply voltage.

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