Datasheet

www.ti.com
ADS8508
SLAS433 – SEPTEMBER 2005
Table 4. Control Truth Table (continued)
Selecting output format x x x x x x 0 Serial data is output in binary 2s complement
format.
x x x x x x 1 Serial data is output in straight binary format.
Table 5. Output Codes and Ideal Input Voltages
DIGITAL OUTPUT
BINARY 2's STRAIGHT
DESCRIP-
ANALOG INPUT COMPLEMENTS BINARY
TION
(SB/ BTC LOW) (SB/ BTC HIGH)
BINARY CODE HEX CODE BINARY CODE HEX CODE
Full-scale ±10 ±5 ±3.33 V 0 V to 5 V 0 V to 10 V 0 V to 4 V
range
Least signifi-
cant bit 4.88 mV 2.44 mV 1.63 mV 1.22 mV 2.44 mV 0.98 mV
(LSB)
Full scale
9.99512 V 4.997567 V 3.33171 V 4.99878 V 9.99756 V 3.99902 V 0111 1111 1111 7FF 1111 1111 1111 FFF
(FS - 1LSB)
Midscale 0 V 0 V 0 V 2.5 V 5 V 2 V 0000 0000 0000 000 1000 0000 0000 800
One LSB
below -4.88 mV -2.44 mV -1.63 mV 2.49878 V 4.99756 V 1.99902 V 1111 1111 1111 FFF 0111 1111 1111 7FF
midscale
-Full scale -10 V -5 V -3.333333 V 0 V 0 V 0 V 1000 0000 0000 800 0000 0000 0000 000
20