Multirange, Single +5V, 12-Bit DAS

with 12-Bit Bus Interface

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9

Table 2. Control-Byte Format

D7 (MSB)

D6

D5

D4

D3

D2

D1

D0 (LSB)

PD1

PD0

ACQMOD

RNG

BIP

A2

A1

A0

Table 4. Clock and Power-Down Selection

PD1 PD0

DEVICE MODE

0

0

Normal Operation / External Clock Mode

0

1

Normal Operation / Internal Clock Mode

1

0

Standby Power-Down (STBYPD); clock mode

is unaffected

1

1

Full Power-Down (FULLPD); clock mode is

unaffected

Table 3. Range and Polarity Selection

BIP

RNG

INPUT RANGE (V)

(MAX196)

0

0

0 to 5

0

1

0 to 10

1

0

±5

1

1

±10

Table 5. Channel Selection

A2

A1

A0

CH0

CH1

CH2

CH3

CH4

CH5

0

0

0

∗

0

0

1

∗

0

1

0

∗

0

1

1

∗

1

0

0

∗

1

0

1

∗

BIT

NAME

DESCRIPTION

7, 6

PD1, PD0

These two bits select the clock and power-down modes (Table 4).

5

ACQMOD

0 = internally controlled acquisition (6 clock cycles), 1 = externally controlled acquisition

4

RNG

Selects the full-scale voltage magnitude at the input (Table 3).

3

BIP

Selects unipolar or bipolar conversion mode (Table 3).

2, 1, 0

A2, A1, A0

These are address bits for the input mux to select the “on” channel (Table 5).

INPUT RANGE (V)

(MAX198)