Datasheet
PIC12F635/PIC16F636/639
DS41232D-page 188 © 2007 Microchip Technology Inc.
AF14 TLFDATAR Rise time of LFDATA — 0.5 — μsVDD = 3.0V
Time is measured from 10% to 90% of
amplitude
AF15 T
LFDATAF Fall time of LFDATA — 0.5 — μsVDD = 3.0V
Time is measured from 10% to 90% of
amplitude
AF16 T
AGC AGC initialization time — 3.5* — ms Time required for AGC stabilization
AF17 T
PAGC High time after AGC settling time — 62.5 — μs Equivalent to two Internal clock cycle (FOSC)
AF18 T
STAB AGC stabilization time plus high
time (after AGC settling time)
(T
AGC +TPAGC)
4 — — ms AGC stabilization time
AF19 T
GAP Gap time after AGC settling time 200 — — μs Typically 1 TE
AF20 TRDY Time from exiting Sleep or POR to
being ready to receive signal
——50* ms
AF21 T
PRES Minimum time AGC level must be
held after receiving AGC Preserve
command
5* — — ms AGC level must not change more than 10%
during T
PRES.
AF22 F
OSC Internal RC oscillator frequency
(±10%)
28.8 32 35.2 kHz Internal clock trimmed at 32 kHz during test
AF23 T
INACT Inactivity timer time-out 14.4 16 17.6 ms 512 cycles of RC oscillator @ FOSC
AF24 TALARM Alarm timer time-out 28.8 32 35.2 ms 1024 cycles of RC oscillator @ FOSC
AF25 RLC LC Pin Input Impedance
LCX, LCY, LCZ — 1* — MOhm Device in Standby mode
AF26 C
IN LC Pin Input Capacitance
LCX, LCY, LCZ — 24 — pF
LCCOM grounded. Vdd = 3.0V,
F
CARRIER = 125 kHz
AF27 T
E Time element of pulse 100 — — μs
AF28 T
OEH Minimum output enable filter high
time
OEH (Bits Config0<7:6>)
01 = 1ms
10 = 2ms
11 = 4ms
00 = Filter Disabled
32 (~1ms)
64 (~2ms)
128 (~4ms)
—
—
—
—
—
—
—
—
—
clock
count
RC oscillator = F
OSC
Viewed from the pin input:
(Note 1)
AF29 T
OEL Minimum output enable filter low
time
OEL (Bits Config0<5:4>)
00 = 1ms
01 = 1ms
10 = 2ms
11 = 4ms
32 (~1ms)
32 (~1ms)
64 (~2ms)
128 (~4ms)
—
—
—
—
—
—
—
—
clock
count
RC oscillator = F
OSC
Viewed from the pin input:
(Note 2)
15.11 AC Characteristics: Analog Front-End for PIC16F639 (Industrial) (Continued)
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Supply Voltage 2.0V ≤ V
DD ≤ 3.6V
Operating temperature -40°C ≤ T
AMB ≤ +85°C for industrial
LC Signal Input Sinusoidal 300 mV
PP
Carrier Frequency 125 kHz
LCCOM connected to V
SS
Param
No.
Sym. Characteristic Min Typ† Max Units Conditions
* Parameter is characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.
Note 1: Required output enable filter high time must account for input path analog delays (= T
OEH - TDR + TDF).
2: Required output enable filter low time must account for input path analog delays (= T
OEL + TDR - TDF).