TC500ACPE TELCOM SEMICONDUCTOR, TC500ACPE Datasheet - Page 12
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TC500ACPE
Manufacturer Part Number
TC500ACPE
Description
IC, ANALOGUE PROCESSOR, DIP16, 500
Manufacturer
TELCOM SEMICONDUCTOR
Datasheet
1.TC500ACPE.pdf
(34 pages)
Specifications of TC500ACPE
Brief Features
Low Power Dissipation, Automatic Input Voltage Polarity Detection
Supply Voltage Range
4.5V To 7.5V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
DIP
No. Of
RoHS Compliant
Ic Function
Precision Analogue Front Ends
Rohs Compliant
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC500ACPE
Manufacturer:
JRC
Quantity:
6 225
Part Number:
TC500ACPE
Manufacturer:
MIC
Quantity:
20 000
TC500/A/510/514
7.0
7.1
The procedure outlined below allows the user to arrive
at values for the following TC5XX design variables:
1.
2.
3.
4.
7.2
Integration time must be picked as a multiple of the
period of the line frequency. For example, T
33 msec, 66 msec and 132 msec maximize 60 Hz line
rejection.
7.3
The duration of the DINT phase is a function of the
amount of voltage stored on the integrator during T
and the value of V
immediately following INT and terminated when an inte-
grator output zero-crossing is detected. In general, the
maximum number of counts chosen for DINT is twice
that of INT (with V
7.4
The desired full-scale input voltage and amplifier output
current capability determine the value of R
buffer and integrator amplifiers each have a full-scale
current of 20 µA.
The value of R
following equation:
EQUATION 7-1:
7.5
C
polypropylene). The slower the conversion rate, the
larger the value C
capacitors for C
Larger values for C
limit rollover errors.
DS21428C-page 12
Where:
V
R
For loop stability, R
REF
IN(MAX)
INT
Integration Phase Timing.
Integrator Timing Components (R
Auto-zero and Reference Capacitors.
Voltage Reference.
and C
= Integrating Resistor (in M )
TYPICAL APPLICATIONS
Component Value Selection
Select Integration Time
DINT and IZ Phase Timing
Calculate Integrating Resistor
(R
Select Reference (C
zero (C
= Maximum input voltage (full count voltage)
AZ
INT
INT
must be low leakage capacitors (such as
R
)
INT
REF
REF
REF
is, therefore, directly calculated in the
AZ
AZ
INT
in M
. The DINT phase must be initiated
and C
) Capacitors
REF
chosen at V
and C
should be
must be. Recommended
AZ
=
REF
are shown in Table 7-1.
V
---------------------- -
IN MAX
IN(MAX)
may also be used to
20
REF
50 k .
INT
) and Auto-
, C
/2).
INT
INT
INT
).
times of
. The
INT
TABLE 7-1:
7.6
The integrating capacitor must be selected to maximize
integrator output voltage swing. The integrator output
voltage swing is defined as the absolute value of V
(or V
Using the 20 µA buffer maximum output current, the
value of the integrating capacitor is calculated using the
following equation.
EQUATION 7-2:
It is critical that the integrating capacitor has a very low
dielectric absorption. Polypropylene capacitors are an
example of one such dialectic. Polyester and poly-
bicarbonate capacitors may also be used in less critical
applications. Table 7-2 summarizes recommended
capacitors for C
TABLE 7-2:
7.7
The reference de-integration voltage is calculated
using the following equation:
EQUATION 7-3:
* Manufactured by Evox Rifa, Inc.
* Manufactured by Evox-Rifa, Inc.
Where:
T
V
V
Conversions
Per Second
INT
S
S
2 or less
= IV
= IV
SS
2 to 7
= Integration Period
>7
) less 0.9V (i.e., IV
DD
DD
Calculate Integrating Capacitor
(C
Calculate V
Value
V
I or IV
I (TC510, TC514)
0.22
0.33
0.47
INT
0.1
REF
C
)
INT
INT
SS
=
Typical Value of
C
C
RECOMMENDED CAPACITOR
FOR C
.
I, whichever is less (TC500/A)
---------------------------------------------------------- - V
REF
REF
=
V
S
-------------------------------------------- -
, C
0.22
0.47
–
0.1
T
2004 Microchip Technology Inc.
REF
AND C
INT
0.9
AZ
INT
DD
2 R
V
(µF)
SMR5 104K50J01L4
SMR5 224K50J02L4
SMR5 334K50J03L4
SMR5 474K50J04L4
S
C
- 0.9VI or IV
20 10
–
INT
INT
0.9
AZ
Part Number*
SMR5 104K50J01L4
SMR5 224K50J02L4
SMR5 474K50J04L4
Suggested
SELECTION
R
Suggested* Part
6 –
INT
Number
SS
+ 0.9VI).
DD