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Dual RF LDMOS Bias Controllers
with I 2 C/SPI Interface
Pin Description
PIN
1
2
3
4
5
6
7
8, 19, 25, 28,
35–39, 42, 46
9
10
11
12
13
14
15
16
17
18
20, 21, 22
NAME
DGND
SAFE1
A0/ CSB
CNVST
SEL
ALARM
SAFE2
N.C.
REFDAC
REFADC
DXP1
DXN1
DXP2
DXN2
ADCIN1
ADCIN2
PGAOUT2
AV DD
AGND
FUNCTION
Digital Ground
Safe Status Channel 1 Output. Programmable active-high or active-low. SAFE1 asserts when
programmed channel 1 temperature threshold or current threshold has been reached.
I 2 C-Compatible Address 0/ SPI-Compatible Chip Select. See the Digital Serial Interface section. In
SPI mode, drive A0/ CSB low to select the device.
Active-Low Conversion-Start Input. Drive CNVST low to start a conversion (clock modes 01 and 11).
Connect CNVST to DV DD when initiating conversions through the serial interface (clock mode 00).
Mode Select. Connect SEL to DGND to select I 2 C mode. Connect SEL to DV DD to select SPI mode.
Alarm Output. Program ALARM for comparator or interrupt output modes (see the Alarm Modes
section). Program ALARM to assert on any combination of channel temperature or current
thresholds.
Safe Status Channel 2 Output. Programmable active-high or active-low. SAFE2 asserts when
programmed channel 2 temperature threshold or current threshold has been reached.
No Connection. Not internally connected.
DAC Reference Input/Output
ADC Reference Input/Output
Diode Positive Input 1. Connect to anode of temperature diode or the base and collector of an npn
transistor.
Diode Negative Input 1. Connect to cathode of temperature diode or the emitter of an npn transistor.
Diode Positive Input 2. Connect to anode of temperature diode or the base and collector of an npn
transistor.
Diode Negative Input 2. Connect to cathode of temperature diode or the emitter of an npn transistor.
ADC Input 1
ADC Input 2
Programmable-Gain Amplifier Output 2
Analog Power-Supply Input
Analog Ground
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