MAX9611 Maxim, MAX9611 Datasheet - Page 16

• Manufacturer Part Number: MAX9611
• Description: The MAX9611/MAX9612 are high-side current-sense amplifiers with an integrated 12-bit ADC and a gain block that can be configured either as an op amp or comparator, making these devices ideal for a number of industrial and automotive applications
• Manufacturer: Maxim

Table 5. Control Register 1 Bit Description
High-Side, Current-Sense Amplifiers with
12-Bit ADC and Op Amp/Comparator
Control Register 2 is an 8-bit write/read register that provides the different time delay options for asserting the com-
parator output when monitoring fault events. Tables 6 and 7 show the bit location and function for Control Register 2.
Table 6. Control Register 2
Table 7. Control Register 2 Bit Descriptions
16
BIT NUMBER
POR VALUE
7, 6, 5, 4
2, 1, 0
7, 6, 5
BIT NAME
BIT
_____________________________________________________________________________________
1, 0
BIT
3
4
3
2
MODE2, MODE1,
MUX2, MUX1,
BIT NAME
BIT NAME
MODE0
DTIM
RTIM
SHDN
MUX0
X
X
LR
7
X
0
Set to 0
Watchdog delay time
0 = 1ms
1 = 100Fs
Watchdog retry delay time
0 = 50ms
1 = 10ms
Set to 0
000 Channel A: Read current-sense amplifier output from ADC, gain = 1x
001 Channel A: Read current-sense amplifier output from ADC, gain = 4x
010 Channel A: Read current-sense amplifier output from ADC, gain = 8x
011 Channel B: Read average voltage of RS+ (input common-mode voltage) from ADC
100 Channel C: Read voltage of OUT from ADC
101 Channel D: Read voltage of SET from ADC
110 Channel E: Read internal die temperature from ADC
111 Read all channels in fast-read mode, sequentially every 2ms. Uses last gain setting.
Power-on state = 0
0 = Normal operation
1 = Shutdown mode
0 = Normal operation
1 = Reset if comparator is latched due to MODE = 111. This bit is automatically reset after a
000 = Normal operation for op amp/comparator
111 = Comparator mode. OUT remains low until CSA output > V
011 = Op-amp mode. OUT regulates pFET for 1ms at V
6
X
0
1 is written.
reversed.
high for 50ms, then OUT autoretries by going low. The comparator has an internal
±10mV hysteresis voltage to help with noise immunity. For MAX9612, the polarity is
then OUT autoretries by going low. For MAX9612, the polarity is reversed.
5
X
0
4
X
0
FUNCTION
FUNCTION
DTIM
3
0
RTIM
SET
2
0
, OUT latches high for 50ms,
SET
for 1ms, OUT latches
1
X
0
Control Register 2
0
X
0