Data Sheet

ADRF6658

Rev. A | Page 25 of 31

REGISTER 15

Control Bits

Program Register 15 by setting Bits[C4:C1] to 1111. This

register controls the built in DGA block.

Figure 42 shows the input data format for programming this

register.

DGAs—Low Power Mode

When set to 1, Bit DB16 enables the DGA low power mode.

When programmed to 0, both DGA blocks work in normal

mode.

In normal mode, the typical current used by each DGA block is

approximately 140 mA. In low power mode, this current

reduces to 23 mA.

Mixer Standby Mode

DB14 determines whether a mixer enters a low power mode or

completely shuts off when the channel is disabled using

Register 13, Bits DB4 and DB5. When DB14 is 0, the mixer is

powered down. When DB14 is 1, the mixer stays in a low power

mode. The band gap reference for the mixer bias circuit remains

on in either case.

Figure 42. Register 15 (R15)

DB31 DB30 DB29 DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 DB18 DB17 DB16 DB15 DB14 DB13 DB12 DB11 DB10 DB9

DB8

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

0

1

0

0

CONTROL BITS

0

0

0

0

0

0

0

DLP

0

MSB

0

0

0

0

0

0

0

0

0

1

C3(1) C2(1) C1(1)

C4(1)

0

1

0

RESERVED

RESERVED

DLP

DIGITALLY CONTROLLED GAIN

0

DISABLED

1

ENABLED

AMPLIFIERS—LOW POWER MODE

MSM

MIXER STANDBY MODE

0

MIXER TURNED OFF WHEN CHANNE L ENABLE = 0

1

MIXER IN LOW POWER WHEN CHANNEL ENABLE = 0