ABSOLUTE MAXIMUM RATINGS

TSA1401

3/19

PIN DESCRIPTIONS

Pin Name

I/O

No

Pin Description

IPOL

I

1

Analog bias current input - adjusts polarization current versus Fs.

VREFP

I/O

2

Top Reference Voltage - may be used as a voltage generator output or used as an

input to adjust the input dynamic range (VIN-VINB=2x(VREFP-VREFM)).

VREFM

I

3

Bottom Reference Voltage. Usually connected to GND (see AN p12 for details)

AGND

I

4, 6, 8, 10, 48 Analog ground.

VIN

I

5

Positive Analog input.

VINB

I

7

Negative Analog Input.

INCM

I/O

9

Internal Common Mode - may be used as a voltage generator output for input sig-

nal common mode or used as an input to force the internal common mode (see AN

p12 for more details).

AVCC

I

11, 12, 46, 47 Analog Power Supply (2.5V).

DVCC

I

13, 14

Digital Power Supply (2.5V) (Clock).

DGND

I

15, 17,19

Digital Ground (Clock).

CLK

I

16

CMOS Clock Input.

NC

NA

18, 42

Non Connected Pin.

GNDBI

I

20

Digital Ground (Internal Buffer).

GNDBE

I

21,40

Digital Ground (External Buffer).

VCCBE

I

22, 39

Digital Power Supply (External Buffer, 2.5V/3.3V).

OR

O

23

Over Range Indicator, if D0-D13=’1’ or ‘0’, OR=’1’.

D13(MSB)-

D0(LSB)

O

24-37

Data CMOS Outputs (2.5V/3.3V).

DR

O

38

Data Ready Signal (2.5V/3.3V).

VCCBI

I

41

Digital Power Supply (Internal Buffers 2.5V).

REFMODE

I

43

REFMODE=’VIL’, internal references active.

REFMODE=‘VIH’, external references must be applied.

OEB

I

44

Output Enable Input. If OEB=’VIH’ then D0-D13 in ‘High Z’ state.

DFSB

I

45

Data Format Select Input - If DFSB=’VIH’ then D13 is standard binary output cod-

ing; if DFSB=’VIL’ then D13 is two’s complemented.