TC500AIJE Microchip Technology, TC500AIJE Datasheet - Page 19

• Manufacturer Part Number: TC500AIJE
• Description: IC ANALOG FRONT END 17BIT 16CDIP
• Manufacturer: Microchip Technology
• Type: Precision Analog Front Endsr

Specifications of TC500AIJE

• Number Of Channels: 1
• Package / Case: 16-CDIP (0.300", 7.62mm)
• Number Of Bits: 17
• Power (watts): 10mW
• Voltage - Supply, Analog: 5V
• Voltage - Supply, Digital: 4.5 V ~ 7.5 V
• Interface Type: Serial (3-Wire)
• Supply Voltage (min): +/- 4.5 V
• Supply Current: 1 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 25 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.0
Refer to Figures 9-1 to 9-4.
EQUATION 9-1:
© 2008 Microchip Technology Inc.
Given:
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Note:
Note:
V
DESIGN EXAMPLES
REF
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 ms. Use 4x line
frequency.
= 66 ms
Calculate R
R
= 100 kΩ
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 ms +66 ms +132 ms +2 ms)
= 3.7 conversions/sec
From which C
(see
Calculate V
=
=
INT
INT
=
1.025 V ( )
(
------------------------------------------------------------------------- -
(
---------------------------------------------------------- -
4.1
Table
V
= V
= (t
AZ
S
–
) 0.33 10
INT
IN(MAX)
+ T
(
0.9
REF
7-1)
) (20 x 10
REF
2 T
INT
INT
IN
INT
2 66 10
) C
(
(
(
: ±2V
AZ
×
:
and C
for maximum (4V)
INT
:
+ 2 T
/20 μA 2 /20 μA
INT
= C
×
–6
)
6 –
) R
) / (4.1)
(
AZ
REF
) 100 10
INT
(
3 –
–6
INT
INT
)
based on
) / (V
+ 2 ms)
= 0.22 μF
) as a multiple
)
×
S
- 0.9)
3
)
TC500/A/510/514
DS21428E-page 19