TC530 Datasheet, PDF (5/22 Pages) TelCom Semiconductor, Inc – 5V PRECISION DATA ACQUISITION SUBSYSTEMS

TC530/TC534
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1
TABLE 2-1: PIN FUNCTION TABLE
Pin Number Pin Number
(TC530)
(TC530)
28-Pin PDIP 28-Pin SOIC
Pin Number
(TC534)
40-Pin PDIP
Pin Number
(TC534)
44-Pin
PQFP
Symbol
Description
1
1
2
2
3
3
4
4
5
5
6
7
8
9
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
10
11
12
Not Used
Not Used
14
6
7
8
9
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
10
11
12
Not Used
Not Used
14
15
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Not Used
Not Used
18
19
20
21
22
40
41
42
43
2
3
4
5
6
7
8
9
10
11
12
13
14
Not Used
Not Used
15
16
17
18
19
V_SS 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.
C_INT Analog output. Integrator capacitor connection and
integrator output.
C_AZ
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 (V_IN- or
CHX-) should be within the common mode range, CMR.
C_REF-
C_REF+
V_REF-
Analog Input. Reference cap negative connection.
Analog Input. Reference cap positive connection.
Analog Input. External voltage reference negative connec-
tion.
V_REF+ Analog Input. External voltage reference positive connec-
tion.
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
V_N-
V_IN+
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.
OSC_OUT
Analog Input. Timebase for state machine. This pin con-
nects to one side of an AT-cut crystal having an effective
series resistance of 100Ω (typ) and a parallel capacitance of
20pF. If an external frequency source is used to clock the
TC530/TC534 this pin must be left floating.
OSC_IN
Analog Input. This pin connects to the other side of the crys-
tal described in OSC_OUT above. The TC530/TC534 may
also be clocked from an external frequency source con-
nected to this pin. The external frequency source must be a
pulse wave form with a minimum 30% duty cycle and rise
and fall times 15nsec (Max). If an external frequency source
is used, OSC_OUT must be left floating. A maximum operat-
ing frequency of 2MHz (crystal) or 4MHz (external clock
source) is permitted.
© 2002 Microchip Technology Inc.
DS21433B-page 5