LTC2990_15 Datasheet, PDF (14/24 Pages) Linear Technology – Quad I2C Voltage, Current and Temperature Monitor

LTC2990
Applications Information
S ADDRESS W# A COMMAND A DATA A DATA A P
10011a1:a0 0 0 XXXXXb3:b0 0 b7:b0 0 b7:b0 0
2990 F06
Figure 6. LTC2990 Serial Bus Repeated Write Byte Protocol
S ADDRESS W# A COMMAND A S ADDRESS R A DATA A# P
10011a1:a0 0 0 XXXXXb3:b0 0
10011a1:a0 1 0 b7:b0 1
2990 F07
Figure 7. LTC2990 Serial Bus Read Byte Protocol
S ADDRESS W# A COMMAND A S ADDRESS R A DATA A DATA A# P
10011a1:a0 0 0 XXXXXb3:b0 0
10011a1:a0 1 0 b7:b0 0 b7:b0 1
2990 F08
Figure 8. LTC2990 Serial Bus Repeated Read Byte Protocol
Table 2. I²C Base Address
HEX I²C BASE ADDRESS
98h
9Ah
9Ch
9Eh
EEh
*X = R/W Bit
BINARY I²C BASE ADDRESS
1001 100X*
1001 101X*
1001 110X*
1001 111X*
1110 1110
ADR1
ADR0
0
0
0
1
1
0
1
1
Global Sync Address
Table 3. LTC2990 Register Address and Contents
REGISTER ADDRESS*^†
REGISTER NAME
READ/WRITE
DESCRIPTION
00h
STATUS
R
Indicates BUSY State, Conversion Status
01h
CONTROL
R/W
Controls Mode, Single/Repeat, Celsius/Kelvin
02h
TRIGGER**
R/W
Triggers an Conversion
03h
N/A
Unused Address
04h
T_INT (MSB)
R
Internal Temperature MSB
05h
T_INT (LSB)
R
Internal Temperature LSB
06h
V1 (MSB)
R
V1, V1 – V2 or T_R1 MSB
07h
V1 (LSB)
R
V1, V1 – V2 or T_R1 LSB
08h
V2 (MSB)
R
V2, V1 – V2 or T_R1 MSB
09h
V2 (LSB)
R
V2, V1 – V2 or T_R1 LSB
0Ah
V3 (MSB)
R
V3, V3 – V4 or T_R2 MSB
0Bh
V3 (LSB)
R
V3, V3 – V4 or T_R2 LSB
0Ch
V4 (MSB)
R
V4, V3 – V4 or T_R2 MSB
0Dh
V4 (LSB)
R
V4, V3 – V4 or T_R2 LSB
0Eh
V_CC (MSB)
R
V_CC MSB
0Fh
V_CC (LSB)
R
V_CC LSB
*Register Address MSBs b7-b4 are ignored.
**Writing any value triggers a conversion. Data Returned reading this register address is the Status register.
†_{Power-on reset sets all registers to 00h.}
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