Datasheet

AISG Integrated Transceiver
MAX9947
4 ______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 5V, V
L
= 3.3V, TXOUT connected with 50I to RXIN, 4.1kI resistor between BIAS and RES, 10kI resistor between RES and
GND, 1kI resistor between SYNCOUT and V
CC
, T
A
= T
MIN
to T
MAX
, unless otherwise specified. XTAL frequency 8.704MHz ±30ppm.
Typical values are at T
A
= +25°C.) (Note 2)
Note 2: All devices are 100% production tested at T
A
= +25°C. Specification over temperature limits are guaranteed by design.
Note 3: Defined as DV
RXIN
/DV
CC
at DC.
Note 4. Defined as DV
TXOUT
/DV
CC
at DC.
Note 5: Guaranteed by design.
Note 6: See the Transmission Output Power section for external resistor values.
Note 7: Guaranteed by design with a recommended 470pF capacitor between RXIN and ground. Measurements above 150MHz
are determined by setup.
Note 8: See Figure 1.
Note 9: Q2µs envelope rise/fall.
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
SWITCHING CHARACTERISTICS
Receiver Propagation Delay t
RX
RXIN to RXOUT, V
DIRMD1
= V
DIRMD2
= 0V 8.9 11
Fs
RXIN to RXOUT, V
DIRMD1
= 3.3V,
V
DIRMD2
= 0V (38.4kbps), V
DIRMD1
= 0V,
V
DIRMD2
= 3.3V (115.2kbps)
5.5 11
Receiver Output Rise and
Fall Time
t
R
, t
F
10% to 90%, R
L
= 1kI, C
L
= 10pF
20 ns
Transmitter Propagation Delay t
TX
TXIN to TXOUT 5
Fs
DIR to RXOUT Delay (Note 8) t
DIR, SKEW
270 ns
Direction Duration High t
DIR, HIGH
V
DIRMD1
= V
DIRMD2
= 0V (9.6kbps) 1667
Fs
V
DIRMD1
= 3.3V, V
DIRMD2
= 0V (38.4kbps) 417
V
DIRMD1
= 0V, V
DIRMD2
= 3.3V (115.2kbps) 137
Receiver Output Data
Duty-Cycle Variation
DDC
RXIN fed by an OOK
2.176MHz sinusoidal
signal with 50% duty
cycle (Note 9)
RXIN = 0dBm -7.5
Q10
%
RXIN = -10dBm +2
Q10