MAX11014 Datasheet, PDF (40/69 Pages) Maxim Integrated Products – Automatic RF MESFET Amplifier Drain-Current Controllers

Automatic RF MESFET Amplifier
Drain-Current Controllers
Table 12. ALMHCFG (Read/Write)
BIT NAME
X
DATA BIT
D15–D12
INTEMP
D11
RESET
STATE
X
0
FUNCTION
Don’t care.
Internal temperature conversion bit. Set to 1 to cause ALARM comparisons for
channel 2 to use the internal temperature conversion result. Set to 0 to cause ALARM
comparisons for channel 2 to use the external temperature conversion result.
ALMCMP
D10
0
ALARM comparator bit. Set to 1 to configure the ALARM output in comparator mode.
Set to 0 to configure the ALARM output in interrupt mode.
VGHYST1
D9
VGHYST0
D8
0
GATE voltage hysteresis bits. The VGHYST_ bits control the built-in hysteresis level
when using the ALARM function in windowing mode for GATE voltage
measurements. The same value is used for the GATE voltage ALARM measurements
0
in both channels.
ITHYST1
D7
ITHYST0
D6
ALM2CLMP1
D5
ALM2CLMP0
D4
ALM1CLMP1
D3
ALM1CLMP0
D2
ALMPOL
D1
ALMOPN
D0
0
Sense voltage/temperature hysteresis bits. The ITHYST_ bits control the built-in
hysteresis level when using the ALARM function in windowing mode for sense
voltage and temperature measurements. The same value is used for the sense
0
voltage and temperature ALARM measurements in both channels.
0
Channel 2 ALARM clamp bits.
0
0
Channel 1 ALARM clamp bits.
0
0
ALARM polarity bit. Set to 1 to force the ALARM output to be active-low. Set to 0 to
force the ALARM output to be active-high.
ALARM open-drain/push-pull output bit. Set to 1 to configure the ALARM output as
0
open-drain. An external pullup or pulldown resistor is required. Multiple ALARM
outputs can be wired together onto a single line in open-drain mode. Set to 0 to
configure the ALARM output as a push-pull output (no external resistor required).
ALMHCFG (Read/Write)
The hardware ALARM configuration register controls
the active states of the ALARM output. Set the com-
mand byte to 3Ch to write to the hardware ALARM con-
figuration register. Set the command byte to BCh to
read the hardware ALARM configuration register. Bits
D15–D12 are don’t care. Set the INTEMP bit, D11, to 1
to cause ALARM comparisons for channel 2 to use the
internal temperature conversion result. Set the
ALMCMP bit, D10, to 1 to set the ALARM output in
comparator mode. Set ALMCMP to 0 to set the ALARM
output in interrupt mode. See Figure 25.
When operating in windowing mode, set the
VGHYST1/0 bits, D9 and D8, to control the GATE_ volt-
age ALARM hysteresis level. This hysteresis level
applies to both channel 1 and channel 2. See Table
12a and Figure 25. When operating in windowing
mode, set the ITHYST1/0 bits, D7 and D6, to control the
sense voltage and temperature ALARM hysteresis
level. This hysteresis level applies to both channel 1
and channel 2. See Table 12b.
Set the ALM2CLMP1/0 bits, D5 and D4, to control
whether or not the GATE2 output is clamped to the
external voltage at ACLAMP2. See Table 12c. Set the
ALM1CLMP1/0 bits, D3 and D2, to control whether or
not the GATE1 output is clamped to the external volt-
age at ACLAMP1. See Table 12c and the Automatic
GATE Clamping section. Set the ALMPOL bit, D1, to 1
make the ALARM output active-low. Set ALMPOL to 0
to make the ALARM output active-high. Set the
ALMOPN bit, D0, to 1 to make the ALARM output an
open-drain output. Set ALMOPN to 0 to force the
ALARM output to be push-pull.
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