MAX1385BUTM+ Maxim Integrated Products, MAX1385BUTM+ Datasheet - Page 52

• Manufacturer Part Number: MAX1385BUTM+
• Description: RF Wireless Misc IC RF LDMOS BIAS CNTRLR
• Manufacturer: Maxim Integrated Products

Specifications of MAX1385BUTM+

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

Dual RF LDMOS Bias Controllers
with I
The following section shows the recommended startup
code for the MAX1385. This code ensures clean startup
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implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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*Double reset. This ensures that the internal ROM is reset correctly after power-up and that the ROM data is latched correctly irre-
spective of power-supply ramp speed.
MNEMONIC
REGISTER
PGACAL
DCFIG
SHUT
SHUT
SCLR
SCLR
SCLR
SCLR
SHUT
SHUT
2
Power-Up Code Sequence
Appendix: Recommended
C/SPI Interface
ADDRESS (hex)
REGISTER
0x64
0x64
0x68
0x68
0x68
0x68
0x64
0x64
0x30
0x4E
WRITTEN
0x000A
0x0080
0x0080
0x0100
0x0200
0x0100
0x0200
0x0080
0x0080
0x0002
CODE
Removes the global power.
Powers up all parts of the MAX1385 and forces the internal reference to
remain powered. The internal oscillator is required for the subsequent
reset command.
Arms the full reset.
Completes the full reset.
Arms the full reset.*
Completes the full reset.*
Removes the global power.
Powers up all parts of the MAX1385 and forces the internal reference to
remain powered. The internal oscillator is required for the subsequent
reset command.
Selects internal references for both DAC and ADC.
Runs autocalibration on both PGA channels to set the input referred
offset to < 50µV. Busy goes low after approximately 30ms and then the
V
GATE
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DACs can be set.
of the part, irrespective of power-supply ramp speed
and starts the device regulating to 312.5mV on both
channels. Change the THRUDAC writes to change the
voltage across the sense resistor. Note it should be run
after the power supplies have stabilized.
NOTES