TC514COI Microchip Technology, TC514COI Datasheet - Page 15

• Manufacturer Part Number: TC514COI
• Description: IC ANALOG FRONT END 17BIT 28SOIC
• Manufacturer: Microchip Technology
• Type: Precision Analog Front Endsr

Specifications of TC514COI

• Number Of Channels: 4
• Package / Case: 28-SOIC (7.5mm Width)
• Number Of Bits: 17
• Power (watts): 18mW
• Voltage - Supply, Analog: 5V
• Voltage - Supply, Digital: 4.5 V ~ 5.5 V
• Interface Type: Serial (3-Wire)
• Supply Voltage (min): 4.5 V
• Supply Current: 1.8 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.0
Refer to Figures 9-1 to 9-4.
EQUATION 9-1:
 2004 Microchip Technology Inc.
Given:
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Note:
Note:
DESIGN EXAMPLES
V
Microchip recommended capacitor:
Evox-Rifa p/n: 5MR5 334K50J03L4.
Microchip recommended capacitor:
Evox-Rifa p/n: 5MR5 224K50J02L4
Required Resolution: 16 bits (65,536
counts).
Maximum V
Power Supply Voltage: +5V
60 Hz System
Pick integration time (t
of the line frequency:
1/60 Hz = 16.6 msec. Use 4x line
frequency.
= 66 msec
Calculate R
R
= 100 k
Calculate C
integrator output swing.
C
= (.066) (20 x 10
= 0.32 µF (use closest value: 0.33 µF)
Choose C
conversion rate.
Conversions/sec:
= 1/(T
= 1/(66 msec +66 msec
= 3.7 conversions/sec
From which C
(see Table 7-1)
Calculate V
REF
INT
INT
+132 msec +2 msec)
=
=
------------------------------------------------------------- -
=
= V
= (t
AZ
---------------------------------------------------------- -
1.025
V
4.1 0.33 1
INT
IN(MAX)
+ T
S
REF
–
) (20 x 10
REF
INT
INT
IN
INT
0.9
2 0.66
: ±2V
AZ
and C
:
2 T
for maximum (4V)
:
+ 2 T
/20 µA 2 /20 µA
= C
–6
C
INT
INT
) / (4.1)
–
AZ
REF
INT
6
–6
INT
based on
) / (V
R
10
+ 2 msec)
= 0.22 F
) as a multiple
INT
5
S
- 0.9)
TC500/A/510/514
DS21428C-page 15