PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 124

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C77X
FIGURE 11-7: CALCULATING THE MINIMUM REQUIRED SAMPLE TIME
T
T
T
T
T
T
T
T
T
T
T
† The temperature coefficient is only required for
FIGURE 11-8: ANALOG INPUT MODEL
DS30275A-page 124
ACQ
ACQ
ACQ
ACQ
ACQ
C
C
C
C
C
C
temperatures > 25 C.
=
=
=
=
=
=
=
=
=
=
=
+ Holding Capacitor Charging Time
(C
-25 pF (1 k
-25 pF (13.5 k ) In (1/16384)
-0.338 (-9.704) s
3.3 s
HOLD
Amplifier Settling Time
+ Holding Capacitor Charging Time
+Temperature Coefficient
5 s
+ T
+ [(Temp - 25 C)(0.05 s/ C)] †
5 s
+ 3.3 s
+ [(50 C - 25 C)(0.05 s / C)]
8.3 s + 1.25 s
9.55 s
C
) (R
IC
Legend C
+10 k + 2.5 k ) In (1/16384)
+ R
VA
SS
Rs
V
I
R
SS
C
LEAKAGE
PIN
T
IC
HOLD
+ R
Port Pin
C
5 pF
S
PIN
) In (1/16384)
= input capacitance
= threshold voltage
= leakage current at the pin due to
= interconnect resistance
= sampling switch
= sample/hold capacitance (from DAC)
various junctions
†
Advance Information
V
DD
V
V
T
T
= 0.6V
= 0.6V
I
LEAKAGE
100 nA
R
IC
1k
V
SS R
DD
Sampling
Switch
6V
5V
4V
3V
2V
SS
Sampling Switch
5 6 7 8 9 10 11
V
C
SS
HOLD
( k
1999 Microchip Technology Inc.
)
= 25 pF