T4227-FB Atmel, T4227-FB Datasheet - Page 4

• Manufacturer Part Number: T4227-FB
• Manufacturer: Atmel

Specifications of T4227-FB

• Operating Supply Voltage (typ): 1.8/2.5/3.3/5V
• Operating Supply Voltage (min): 1.1V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 16
• Lead Free Status / RoHS Status: Not Compliant

DEM
Demodulator output
To ensure the function, a external capacitor has to be
connected at this output. The value of the capacitor has be
adapted to the frequency of the received signal.
Frequencies below 70 kHz require a value of 68 nF to
100 nF, where as frequencies 70 kHz and above can work
with 47 nF to 68 nF.
HLD
AGC hold mode: HLD high (V
function, SL low (V
voltage. This can be used to prevent the AGC from peak
voltages, created by e.g., a stepper motor.
T4227
4 (14)
DEM
GND
GND
VCC
HLD
VCC
PAD 11
(Pin 14)
PAD12
(Pin15)
PAD 4
(Pin 5)
PAD 2
(Pin 3)
PAD 4
(Pin 5)
PAD 2
(Pin 3)
25k
SL
= 0) holds for a short time the AGC
Figure 8.
Figure 7.
SL
= V
Preliminary Information
CC
) sets normal
PK
Peak detector output: An external capacitor has to be
connected to ensure the function of the peak detector. The
value of the capacitance influences the AGC regulation
time.
VCC, GND
VCC and GND are the supply voltage input. To power
down the circuitry it is recommended to use the PDN
input and not to switch the power supply. Switching the
power supply effects in a long power up waiting time.
PON
If PON is connected to GND, the receiver will be
activated. The set-up time is typically 0.5 s after applying
GND at this pin. If PON is connected to V
will switch to power-down mode.
GND
VCC
PK
PAD 10
(Pin 13)
PAD 4
(Pin 5)
PAD 2
(Pin 3)
VCC
GND
PON
(Pin 12)
PAD 4
PAD 2
(Pin 5)
PAD 9
(Pin 3)
Figure 10.
Figure 9.
BIAS
Generator
Rev. A3, 20-Mar-01
CC
from
Demodulator
, the receiver