CS5530

20

DS742F2

WR3-WR0 (Word Rate) [14:11]

The listed Word Rates are for continuous conversion mode using a 4.9152 MHz clock. All word rates will

scale linearly with the clock frequency used. The very first conversion using continuous conversion mode

will last longer, as will conversions done with the single conversion mode. See the section on Performing

Conversions and Tables 1 and 2 for more details.

Bit

WR (FRS = 0)

WR (FRS = 1)

0000

120 Sps

100 Sps

0001

60 Sps

50 Sps

0010

30 Sps

25 Sps

0011

15 Sps

12.5 Sps

0100

7.5 Sps

6.25 Sps

1000

3840 Sps

3200 Sps

1001

1920 Sps

1600 Sps

1010

960 Sps

800 Sps

1011

480 Sps

400 Sps

1100

240 Sps

200 Sps

All other combinations are not used.

U/B (Unipolar / Bipolar) [10]

0

Select Bipolar mode.

1

Select Unipolar mode.

OCD (Open Circuit Detect Bit) [9]

When set, this bit activates a 300 nA current source on the input channel (AIN+) selected by the channel

select bits. Note that the 300nA current source is rated at 25°C. This feature is particularly useful in ther-

mocouple applications when the user wants to drive a suspected open thermocouple lead to a supply rail.

0

Normal mode.

1

Activate current source.

NU (Not Used) [8:0]

0

Must always be logic 0. Reserved for future upgrades.