Datasheet

Appendix:

Startup Code Example

Below is a sample startup code for the MAX11014.

This code ensures clean startup of the part irrespec-

tive 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 ran after the power

supplies have stabilized. A PGA calibration can be run,

but is not required for the part to function.

MAX11014/MAX11015

Automatic RF MESFET Amplifier

Drain-Current Controllers

______________________________________________________________________________________ 69

Note double reset. This ensures that the internal ROM is reset correctly after power-up and that the ROM data is latched correctly

irrespective of the power-supply ramp speed.

MNEMONIC

ADDRESS (hex)

CODE WRITTEN

NOTES

SHUT 0x64 0x0000 Removes the global power-down.

SHUT 0x64 0x0000 Powers up all parts of the MAX11014.

SCLR 0x74 0x0020 Arms the full reset.

SCLR 0x74 0x0040 Completes the full reset.

SCLR 0x74 0x0020 Arms the full reset.*

SCLR 0x74 0x0040 Completes the full reset.*

FLAG 0xF6

Read of FLAG register to verify reset good. Code should read

0xX042 if reset good.

SHUT 0x64 0x0000 Removes the global power-down.

SHUT 0x64 0x0000 Powers up all parts of the MAX11014.

HCFG 0x38 0x004F Sets internal references for both DAC and ADC.

THRUDAC1 0x4A 0x7FF Midscale on DAC1, sets sense voltage to 312.5mV.

THRUDAC2 0x4E 0x7FF Midscale on DAC2, sets sense voltage to 312.5mV.

PGACAL 0x5E 0x0002 Completes tracking CAL (wait for BUSY to fall).

ALMHCFG 0x3C 0x0014 Releases GATE clamps and regulation begins.

Package Information

For the latest package outline information and land patterns, go

to www.maxim-ic.com/packages

PACKAGE TYPE PACKAGE CODE DOCUMENT NO.

48 TQFN-EP T4877-6

21-0144