LTC2348-16

15

234816fa

For more information www.linear.com/LTC2348-16

conFiguraTion Tables

Table 1a. SoftSpan Configuration Table. Use This Table with Table 1b to Choose Independent Binary SoftSpan Codes SS[2:0] for Each

Channel Based on Desired Analog Input Range. Combine SoftSpan Codes to Form 24-Bit SoftSpan Configuration Word S[23:0]. Use

Serial Interface to Write SoftSpan Configuration Word to LTC2348-16, as shown in Figure 19

BINARY SoftSpan CODE

SS[2:0]

ANALOG INPUT RANGE

FULL SCALE RANGE

BINARY FORMAT OF

CONVERSION RESULT

111

Two’s Complement

110

Two’s Complement

101

Straight Binary

100

Straight Binary

011

Two’s Complement

010

Two’s Complement

001

Straight Binary

000

Channel Disabled

Channel Disabled

All Zeros

Table 1b. Reference Configuration Table. The LTC2348-16 Supports Three Reference Configurations. Analog Input Range Scales with

REFERENCE CONFIGURATION

BINARY SoftSpan CODE

SS[2:0]

ANALOG INPUT RANGE

Internal Reference with

Internal Buffer

2.048V

4.096V

111

±10.24V

110

±10V

101

0V to 10.24V

100

0V to 10V

011

±5.12V

010

±5V

001

0V to 5.12V

External Reference with

Internal Buffer

(REFIN Pin Externally

Overdriven)

1.25V

(Min Value)

2.5V

111

±6.25V

110

±6.104V

101

0V to 6.25V

100

0V to 6.104V

011

±3.125V

010

±3.052V

001

0V to 3.125V

2.2V

(Max Value)

4.4V

111

±11V

110

±10.742V

101

0V to 11V

100

0V to 10.742V

011

±5.5V

010

±5.371V

001

0V to 5.5V