Datasheet

LTC2444/LTC2445/
LTC2448/LTC2449
15
2444589fc
For more information www.linear.com/LTC2444
applicaTions inForMaTion
Table 4. Channel Selection for the LTC2444/LTC2445 (Bit A2 Should Always Be 0)
MUX ADDRESS CHANNEL SELECTION
SGL ODD/SIGN A2 A1 A0 0 1 2 3 4 5 6 7 COM
0 0 0 0 0 IN
+
IN
–
0 0 0 0 1 IN
+
IN
–
0 0 0 1 0 IN
+
IN
–
0 0 0 1 1 IN
+
IN
–
0 1 0 0 0 IN
–
IN
+
0 1 0 0 1 IN
–
IN
+
0 1 0 1 0 IN
–
IN
+
0 1 0 1 1 IN
–
IN
+
1 0 0 0 0 IN
+
IN
–
1 0 0 0 1 IN
+
IN
–
1 0 0 1 0 IN
+
IN
–
1 0 0 1 1 IN
+
IN
–
1 1 0 0 0 IN
+
IN
–
1 1 0 0 1 IN
+
IN
–
1 1 0 1 0 IN
+
IN
–
1 1 0 1 1 IN
+
IN
–
*Default at power up
Table 5. LTC2444/LTC2445/LTC2448/LTC2449 Speed/Resolution Selection
OSR3 OSR2 OSR1 OSR0 TWOX
RMS NOISE
LTC2444/LTC2448
RMS NOISE
LTC2445/LTC2449
ENOB
LTC2444/LTC2448
ENOB
LTC2445/LTC2449 OSR LATENCY
0 0 0 0 0 Keep Previous Speed/Resolution
0 0 0 1 0 23µV 23µV 17 17 64 none
0 0 1 0 0 4.4µV 3.5µV 20.1 20.1 128 none
0 0 1 1 0 2.8µV 2µV 20.8 21.3 256 none
0 1 0 0 0 2µV 1.4µV 21.3 21.8 512 none
0 1 0 1 0 1.4µV 1µV 21.8 22.4 1024 none
0 1 1 0 0 1.1µV 750nV 22.1 22.9 2048 none
0 1 1 1 0 720nV 510nV 22.7 23.4 4096 none
1 0 0 0 0 530nV 375nV 23.2 24 8192 none
1 0 0 1 0 350nV 250nV 23.8 24.4 16384 none
1 1 1 1 0 280nV 200nV 24.1 24.6 32768 none
0 0 0 0 1 Keep Previous Speed/Resolution
0 0 0 1 1 23µV 23µV 17 17 64 1 cycle
0 0 1 0 1 4.4µV 3.5µV 20.1 20.1 128 1 cycle
0 0 1 1 1 2.8µV 2µV 20.8 21.3 256 1 cycle
0 1 0 0 1 2µV 1.4µV 21.3 21.8 512 1 cycle
0 1 0 1 1 1.4µV 1µV 21.8 22.4 1024 1 cycle
0 1 1 0 1 1.1µV 750nV 22.1 22.9 2048 1 cycle
0 1 1 1 1 720nV 510nV 22.7 23.4 4096 1 cycle
1 0 0 0 1 530nV 375nV 23.2 24 8192 1 cycle
1 0 0 1 1 350nV 250nV 23.8 24.4 16384 1 cycle
1 1 1 1 1 280nV 200nV 24.1 24.6 32768 1 cycle