TRF6900
SINGLE-CHIP RF TRANSCEIVER
SLAS213C – SEPTEMBER 1999 – REVISED MAY 2000
electrical characteristics over full range of operating conditions, (typical values are at PA_VCC,
PLL_VCC, DDS_VCC, DIG_VCC, DEM_VCC, MIX_VCC, LNA_VCC = 3 V, T = 25 °C) (unless otherwise
A
noted) (continued)
direct digital synthesizer (DDS)
PARAMETER
TEST CONDITIONS
MIN
15
15
0
TYP
MAX
26
UNIT
as oscillator
as buffer
Reference oscillator input frequency, ƒ
MHz
ref
26
Programmable DDS divider ratio
DDS divider resolution, ∆ƒ
22 bits
8 bits
4194303
24
N × ƒ ÷ 2
ref
FSK – modulation register ratio
FSK – modulation resolution
0
1020
22
N × ƒ ÷ 2
ref
PLL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
MHz
dBm
RF input frequency
RF input power
850
950
Internal VCO by-passed; external input applied to VCO_TANK2
–10
RF input divider ratio, N
RF output frequency resolution
Charge pump current
256
512
24
N × ƒ ÷ 2
ref
Programmable with external resistor, 100 kΩ nominal, APLL = 0
70
µA
power amplifier
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Frequency range
850
–1
950
MHz
0 dB attenuation
10 dB attenuation
20 dB attenuation
Amplifier off
4.5
–0.5
–8
–5
Amplifier output power
dBm
–14
–56
Optimal load impedance
See Figure 22
–6
Ω
nd
2
-order harmonic
V
V
= 3 V, 0 dB attenuation
= 3 V, 0 dB attenuation
dBc
dBc
CC
rd
3
-order harmonic
–20
CC
typical mode switching and lock times
OPERATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Frequency hop time between adjacent
channels, during receive
From transition of MODE to DATA_OUT valid, Channel
spacing = 500 kHz, APLL = 111b (maximum)
30
µs
‡
Fromtransition of MODE to valid RF signal at PA_OUT,
PLL locked, 10.7 MHz RX to TX separation
‡
Receive-to-transmit turnaround time
200
200
600
µs
µs
µs
From transition of MODE to valid data at DATA_OUT,
PLL locked, 10.7 MHz RX to TX separation
‡
Transmit-to-receive turnaround time
FromrisingedgeofSTDBYtovaliddataatDATA_OUT,
APLL = 111b (maximum)
‡
Standby to receive time
From rising edge of STDBY to valid RF signal at
PA_OUT, APLL = 111b (maximum)
‡
Standby to transmit time
500
µs
‡
Highly dependent upon loop filter topology.
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
