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TRF4400 Datasheet(PDF) 6 Page - Texas Instruments

Part # TRF4400
Description  SINGLE-CHIP 433-MHz RF TRANSMITTER
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TRF4400 Datasheet(HTML) 6 Page - Texas Instruments

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TRF4400
SINGLECHIP 433MHz RF TRANSMITTER
SLWS113D −NOVEMBER 2000 − REVISED FEBRUARY 2005
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over full range of operating conditions, (typical values are at PA_VCC,
PLL_VCC, DIG_VCC, VCC =
3 V, TA = 25°C) (unless otherwise noted) (continued)
direct digital synthesizer (DDS)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference oscillator input frequency,
ƒref
As oscillator
15
26
MHz
Reference oscillator input frequency,
ƒref
As buffer
15
26
MHz
Programmable DDS divider ratio
22 bits
0
4194303
DDS divider resolution,
∆ƒ
N
× ƒref ÷ 224
FSK − modulation register ratio
8 bits
0
1020
FSK − modulation resolution
N
× ƒref ÷ 222
PLL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
RF input frequency
420
433
450
MHz
RF input power
Internal VCO bypassed; external input applied to VCO_TANK2
−10
dBm
RF input divider ratio, N
256
512
RF output frequency resolution
N
× ƒref ÷ 224
Charge pump current
Programmable with external resistor, 100-k
Ω nominal, APLL = 0
70
µA
power amplifier
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Frequency range
420
433
450
MHz
0-dB attenuation
7
Amplifier output power (see Note 2)
10-dB attenuation
−3
dBm
Amplifier output power (see Note 2)
20-dB attenuation
−12
dBm
Amplifier off
−70
Optimal load impedance
See Figure 11
2nd-order harmonic
VCC = 3 V, 0-dB attenuation
−10
dBc
3rd-order harmonic
VCC = 3 V, 0-dB attenuation
−20
dBc
NOTE 2: The device and output matching network (see Application Information section) is designed to provide the output power into a 50-
Ω load.
The device stability was tested (no parasitic oscillations) with an output VSWR of 10:1 over all phase angles and is not tested in
production.
typical mode switching and lock times
OPERATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Standby to transmit time†
From rising edge of STDBY to valid RF signal at PA_OUT,
APLL = 111b (maximum)
500
µs
† Highly dependent upon loop filter topology


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