5V PRECISION DATA ACQUISITION
SUBSYSTEMS
1
2
3
4
5
6
7
8
TC530
TC534
PIN DESCRIPTION
Pin No.
(TC530
28-Pin
Pin No. Pin No
(TC530 (TC534
Pin No.
(TC534
44-Pin
PQFP)
28-Pin
40-Pin
PDIP)
PDIP, 300 Mil.) SOIC)
Symbol Description
1
1
1
40
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.
2
2
2
41
CINT
Analog Output. Integrator capacitor connection and integrator
output.
3
4
3
4
3
4
42
43
CAZ
Analog Input. Auto Zero capacitor connection.
BUF
Analog Output. Integrator capacitor connection and voltage
buffer output.
5
5
5
2
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 (VI–N or Chx–) should be
within the common mode range, CMR.
6
6
6
7
3
4
5
6
7
CR–EF
CR+EF
VR–EF
VR+EF
CH4–
Analog Input. Reference cap negative connection.
7
7
Analog Input. Reference cap positive connection.
8
9
8
9
8
Analog Input. External voltage reference negative connection.
Analog Input. External voltage reference positive connection.
9
Not Used
Not Used
10
Analog Input. Multiplexer channel 4 negative differential
analog input.
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
11
12
13
14
15
16
17
8
CH3–
CH2–
CH1–
CH4+
CH3+
CH2+
CH1+
Analog Input. Multiplexer channel 3 negative differential
analog input.
9
Analog Input. Multiplexer channel 2 negative differential
analog input.
10
11
12
13
14
Analog Input. Multiplexer channel 1 negative differential
analog input.
Analog Input. Multiplexer channel 4 positive differential
analog input.
Analog Input. Multiplexer channel 3 positive differential
analog input.
Analog Input. Multiplexer channel 2 positive differential
analog input.
Analog Input. Multiplexer channel 1 positive differential
analog input.
10
11
10
11
Not Used
Not Used
VI–N
VI+N
Analog Input. Negative differential analog voltage input.
Analog Input. Positive differential analog voltage input.
Analog Input. Ground connection for serial port circuit.
Logic Level Input. Multiplexer address MSB.
Not Used
Not Used
12
12
18
19
20
21
15
16
17
18
DGND
A1
Not Used
Not Used
14
Not Used
Not Used
14
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 20pF
If an external frequency source is used to clock the TC530/534,
this pin must be left floating.
TELCOM SEMICONDUCTOR, INC.
3-51
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
