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TC530 Datasheet PDF : 28 Pages
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TC530/TC534
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
Pin Number Pin Number Pin Number
(TC530)
(TC530)
(TC534)
28-Pin PDIP 28-Pin SOIC 40-Pin PDIP
1
1
1
Pin
Number
(TC534)
44-Pin
MQFP
40
2
2
2
41
3
3
3
42
4
4
4
43
5
5
5
2
6
6
6
3
7
7
7
4
8
8
8
5
9
9
9
6
—
—
10
7
—
—
11
8
—
—
12
9
—
—
13
10
—
—
14
11
—
—
15
12
—
—
16
13
—
—
17
14
10
10
—
—
11
11
—
—
12
12
18
15
—
—
19
16
—
—
20
17
14
14
21
18
15
15
22
19
Sym
Description
VSS Analog output. Negative power supply converter output and
reservoir capacitor connection. This output can be used to
provide negative bias to other devices in the system.
CINT Analog output. Integrator capacitor connection and
integrator output.
CAZ
BUF
Analog input. Auto Zero capacitor connection.
Analog output. Integrator capacitor connection and voltage
buffer output.
ACOM
Analog input. This pin is ground for all of the analog
switches in the A/D converter. It is grounded for most
applications. ACOM and the input common pin (VIN- or
CHX-) should be within the common mode range, CMR.
CREF-
CREF+
VREF-
Analog Input. Reference cap negative connection.
Analog Input. Reference cap positive connection.
Analog Input. External voltage reference negative
connection.
VREF+ Analog Input. External voltage reference positive
connection.
CH4- Analog Input. Multiplexer channel 4 negative differential
CH3- Analog Input. Multiplexer channel 3 negative differential
CH2- Analog Input. Multiplexer channel 2 negative differential
CH1- Analog Input. Multiplexer channel 1 negative differential
CH4+ Analog Input. Multiplexer channel 4 positive differential
CH3+ Analog Input. Multiplexer channel 3 positive differential
CH2+ Analog Input. Multiplexer channel 2 positive differential
CH1+ Analog Input. Multiplexer channel 1 positive differential
VN-
VIN+
DGND
Analog Input. Negative differential analog voltage input.
Analog Input. Positive differential analog voltage input.
Analog Input. Ground connection for serial port circuit.
A1 Logic Level Input. Multiplexer address MSB.
A0 Logic Level Input. Multiplexer address LSB.
OSCOUT
Analog Input. Timebase for state machine. This pin
connects to one side of an AT-cut crystal having an effective
series resistance of 100Ω (typ) and a parallel capacitance
of 20 pF. If an external frequency source is used to clock
the TC530/TC534 this pin must be left floating.
OSCIN
Analog Input. This pin connects to the other side of the
crystal described in OSCOUT above. The TC530/TC534
may also be clocked from an external frequency source
connected to this pin. The external frequency source must
be a pulse waveform with a minimum 30% duty cycle and
rise and fall times 15nsec (Max). If an external frequency
source is used, OSCOUT ) must be left floating. A maximum
operating frequency of 2 MHz (crystal) or 4 MHz (external
clock source) is permitted.
DS21433C-page 6
© 2007 Microchip Technology Inc.
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