3-51

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

PIN DESCRIPTION

Pin No.

Pin No.

Pin No

Pin No.

(TC530

(TC530

(TC534

(TC534

28-Pin

28-Pin

40-Pin

44-Pin

PDIP, 300 Mil.) SOIC)

PDIP)

PQFP)

Symbol

Description

11

1

40

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.

22

2

41

Analog Output. Integrator capacitor connection and integrator

output.

33

3

42

Analog Input. Auto Zero capacitor connection.

4

4

4

43

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 (V

–

within the common mode range, CMR.

66

6

3

C

–

REF

Analog Input. Reference cap negative connection.

77

7

4

C

+

REF

Analog Input. Reference cap positive connection.

88

8

5

V

–

REF

Analog Input. External voltage reference negative connection.

99

9

6

V

+

REF

Analog Input. External voltage reference positive connection.

Not Used

Not Used

10

7

Analog Input. Multiplexer channel 4 negative differential

analog input.

Not Used

Not Used

11

8

Analog Input. Multiplexer channel 3 negative differential

analog input.

Not Used

Not Used

12

9

Analog Input. Multiplexer channel 2 negative differential

analog input.

Not Used

Not Used

13

10

Analog Input. Multiplexer channel 1 negative differential

analog input.

Not Used

Not Used

14

11

Analog Input. Multiplexer channel 4 positive differential

analog input.

Not Used

Not Used

15

12

Analog Input. Multiplexer channel 3 positive differential

analog input.

Not Used

Not Used

16

13

Analog Input. Multiplexer channel 2 positive differential

analog input.

Not Used

Not Used

17

14

Analog Input. Multiplexer channel 1 positive differential

analog input.

10

10

Not Used

Not Used

V

–

IN

Analog Input. Negative differential analog voltage input.

11

11

Not Used

Not Used

V

+

IN

Analog Input. Positive differential analog voltage input.

12

12

18

15

DGND

Analog Input. Ground connection for serial port circuit.

Not Used

Not Used

19

16

A1

Logic Level Input. Multiplexer address MSB.

Not Used

Not Used

20

17

A0

Logic Level Input. Multiplexer address LSB.

14

14

21

18

Analog Input. Timebase for state machine. This pin connects

to one side of an AT-cut crystal having an effective series

resistance of 100

Ω (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.

5V PRECISION DATA ACQUISITION

SUBSYSTEMS

TC530

TC534