AD9775 datasheet(18/56 Pages) AD

18 / 56 page

AD9775

Rev. E | Page 18 of 56

MODE CONTROL (VIA SPI PORT)

Table 10. Mode Control via SPI Port1

Address

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

0x00

SDIO

Bidirectional

0 = Input

1 = I/O

LSB, MSB

First, 0 = MSB

1 = LSB

Software

Reset on

Logic 1

Sleep Mode

Logic 1

Shuts Down

the DAC

Output

Currents

Power-Down

Mode Logic 1

Shuts Down All

Digital and

Analog

Functions

1R/2R Mode

DAC Output

Current Set

by One or

Two External

Resistors

0 = 2R,

1 = 1R

PLL_LOCK

Indicator

0x 01

Filter

Interpolation

Rate (1×, 2×,

4×, 8×)

Filter

Interpolation

Rate (1×, 2×, 4×,

8×)

Modulation

Mode

(None, fS/2,

fS/4, fS/8)

Modulation

Mode

(None, fS/2,

fS/4, fS/8)

0 = No Zero

Stuffing on

Interpolation

Filters, Logic 1

Enables Zero

Stuffing.

1 = Real

Mix Mode

0 = Complex

Mix Mode

0 = e−jωt

1 = e+jωt

DATACLK/

PLL_LOCK2

Select

0 = PLLLOCK

1 = DATACLK

0x 02

0 = Signed

Input Data

1 = Unsigned

0 = Two-Port

Mode

1 = One-Port

Mode

DATACLK

Driver

Strength

DATACLK

Invert

0 = No Invert

1 = Invert

ONEPORTCLK

Invert

0 = No Invert

1 = Invert

IQSEL Invert

0 = No Invert

1 = Invert

Q First

0 = I First

1 = Q First

0x 03

Data Rate

Clock Output2

PLL Divide

(Prescaler)

Ratio

PLL Divide

(Prescaler)

Ratio

0x 04

0 = PLL OFF2

1 = PLL ON

0 = Automatic

Charge Pump

Control, 1 =

Programmable

PLL Charge

Pump

Control

PLL Charge

Pump

Control

PLL Charge

Pump Control

0x 05

IDAC Fine Gain Adjustment

0x 06

IDAC Coarse Gain Adjustment

0x 07

IDAC Offset

Adjustment

Bit 9

IDAC Offset

Adjustment

Bit 8

IDAC Offset

Adjustment

Bit 7

IDAC Offset

Adjustment

Bit 6

IDAC Offset

Adjustment

Bit 5

IDAC Offset

Adjustment

Bit 4

IDAC Offset

Adjustment

Bit 3

IDAC Offset

Adjustment

Bit 2

0x 08

IDAC IOFFSET

Direction

0 = IOFFSET

on IOUTA

1 = IOFFSET

on IOUTB

IDAC Offset

Adjustment

Bit 1

IDAC Offset

Adjustment

Bit 0

0x 09

QDAC Fine Gain Adjustment

0x 0A

QDAC Coarse Gain Adjustment

0x 0B

QDAC Offset

Adjustment

Bit 9

QDAC Offset

Adjustment

Bit 8

QDAC Offset

Adjustment

Bit 7

QDAC Offset

Adjustment

Bit 6

QDAC Offset

Adjustment

Bit 5

QDAC Offset

Adjustment

Bit 4

QDAC Offset

Adjustment

Bit 3

QDAC Offset

Adjustment

Bit 2

0x 0C

QDAC IOFFSET

Direction

0 = IOFFSET

on IOUTA

1 = IOFFSET

on IOUTB

QDAC Offset

Adjustment

Bit 1

QDAC Offset

Adjustment

Bit 0

0x 0D

Version Register

1 Default values are shown in bold.

2 See the Two-Port Data Input Mode section.

AD9775 датащи(PDF) 18 Page - Analog Devices

AD9775 датащи(HTML) 18 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

датащи скачать

ссылки URL