MAX1385BETM+ Maxim Integrated Products, MAX1385BETM+ Datasheet - Page 28

• Manufacturer Part Number: MAX1385BETM+
• Description: RF Wireless Misc IC CTRLR LDMOS BIAS 5V
• Manufacturer: Maxim Integrated Products

Specifications of MAX1385BETM+

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual RF LDMOS Bias Controllers
with I
Write to Channel 1 and Channel 2 High-Current-
Threshold registers by sending the appropriate write
command byte followed by data bits D15–D0 (see
Table 5). Bits D15–D12 are don’t care. Read channel 1
and channel 2 high-current thresholds by sending the
appropriate read command byte. Channel 1 and
Channel 2 Current-Threshold registers are compared to
ADC readings at PGAOUT1 and PGAOUT2. Use the
following equation to find the required threshold code
for a specified threshold current:
Figure 10. Hysteresis-Threshold-Mode Timing Diagram
Table 3. TH1 and TH2 (Read/Write)
X = Don’t care.
28
POR
Bit Value
(°C)
I
THRESH
HIGH THRESHOLD
LOW THRESHOLD
______________________________________________________________________________________
COMPARATOR MODE
INTERRUPT MODE
(ACTIVE LOW)
(ACTIVE LOW)
(TEMPERATURE OR CURRENT)
D15
=
MEASUREMENT VALUE
OUTPUT-
OUTPUT-
X
X
I
2
ALARM OUTPUT
DRAIN
C/SPI Interface
D14
X
X
×
R
D13
SENSE
X
X
D12
X
X
IH1 and IH2 (Read/Write)
FLAG REGISTER
×
Av
READ
(MSB)
PGA
-256
D11
0
×
V
+128
REFADC
D10
4096
1
+64
D9
1
+32
D8
1
where I
R
of the PGA, V
I
in decimal.
Write to Channel 1 and Channel 2 Low-Current-
Threshold registers by sending the appropriate write
command byte followed by data bits D15–D0 (see
Table 6). Bits D15–D12 are don’t care. Read channel 1
and channel 2 low-current thresholds by sending the
appropriate read command byte. Channel 1 and
Channel 2 Low-Current Threshold registers are com-
pared to ADC readings at PGAOUT1 and PGAOUT2.
THRESH
SENSE
+16
D7
1
DRAIN
is the sense resistor, Av
D6
+8
1
is the resulting threshold register value
REFADC
D5
is the current threshold in amperes,
+4
1
is the ADC reference voltage, and
D4
+2
1
FLAG REGISTER
READ
D3
+1
1
IL1 and IL2 (Read/Write)
PGA
+0.5
D2
1
is the voltage gain
+0.25
D1
1
TIME
TIME
+0.125
(LSB)
D0
1