AD9670EBZ datasheet(42/48 Pages) AD

42 / 48 page

Data Sheet

AD9674

Rev. A | Page 41 of 47

Addr.

(Hex) RegisterName

Bit 7 (MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

Default

Value Comments

0x00D TEST_IO

User test mode: 0 =

continuous, repeat

user patterns

(1, 2, 3, 4, 1, 2, 3, 4, …)

(default), 1 = single

clock cycle user

patterns, then zeros

(1, 2, 3, 4, 0, 0, …)

Reset PN

long gen

0 = on,

PN long

running

(default),

1 = off,

PN long

held in

reset

Reset PN

short gen:

0 = on,

PN short

running

(default),

1 = off,

PN short

held in

reset

Output test mode:

0000 = off (default),

0001 = midscale short,

0010 = positive full-scale short,

0011 = negative full-scale short,

0100 = checkerboard output,

0101 = PN sequence long,

0110 = PN sequence short,

0111 = one-word/zero-word toggle,

1000 = user input,

1001:1110 = reserved,

1111 = ramp output (see Table 16)

0x00

When register is set, the

test data is placed on the

output pins in place of

normal data (local).

0x00E GPO

GPO3

output:

0 = low

(default);

1 = high

GPO2

output:

0 = low

(default);

1 = high

GPO1

output:

0 = low

(default):

1 = high

GPO0

output:

0 = low

(default);

1 = high

0x00

Values placed on GPOx

pins (global).

0x00F FLEX_CHANNEL

_INPUT

Filter cutoff frequency control:

00000 = 1.45 × (1/3) × fSAMPLE,

00001 = 1.25 × (1/3) × fSAMPLE,

00010 = 1.13 × (1/3) × fSAMPLE,

00011 = 1.0 × (1/3) × fSAMPLE (default),

00100 = 0.9 × (1/3) × fSAMPLE,

00101 = 0.8 × (1/3) × fSAMPLE,

00110 = 0.75 × (1/3) × fSAMPLE,

00111 = reserved,

01000 = 1.45 × (1/4.5) × fSAMPLE,

01001 = 1.25 × (1/4.5) × fSAMPLE,

01010 = 1.13 × (1/4.5) × fSAMPLE,

01011 = 1.0 × (1/4.5) × fSAMPLE,

01100 = 0.9 × (1/4.5) × fSAMPLE,

01101 = 0.8 × (1/4.5) × fSAMPLE,

01110 = 0.75 × (1/4.5) × fSAMPLE,

01111 = reserved,

10000 = 1.45 × (1/6) × fSAMPLE,

10001 = 1.25 × (1/6) × fSAMPLE,

10010 = 1.13 × (1/6) × fSAMPLE,

10011 = 1.0 × (1/6) × fSAMPLE,

10100 = 0.9 × (1/6) × fSAMPLE,

10101 = 0.8 × (1/6) × fSAMPLE,

10110 = 0.75 × (1/6) × fSAMPLE,

1 0111 = reserved

Band

mode:

0 = low

(default,

8 MHz to

18 MHz),

1 = high

(13.5 MHz

to 30 MHz)

0x18

Antialiasing filter cutoff

(global).

0x010 FLEX_OFFSET

0x20

Reserved.

0x011 FLEX_GAIN

Digital VGA gain control:

0000 = GAIN± pins enabled (default),

0001 = 0.0 dB (maximum gain, GAIN± pins disabled),

0010 = −3.5 dB,

0011 = −7.0 dB,

….,

1110 = 45 dB

1111 = 45 dB

PGA gain:

00 = 21 dB,

01 = 24 dB (default),

10 = 27 dB,

11 = 30 dB

LNA gain:

00 = 15.6 dB,

01 = 17.9 dB,

10 = 21.6 dB

(default)

0x06

LNA and PGA gain

adjustment (global).

0x012 BIAS_CURRENT

PGA bias:

0 = 100%

(default),

1 = 60%

LNA bias:

00 = high,

01 = midhigh (default),

10 = midlow,

11 = low

0x09

LNA bias current

adjustment (global).

0x013 RESERVED_13

0x00

Reserved.

0x014 OUTPUT_MODE

Output data

enable:

0= enable

(default),

1 = disable

Output

data

invert:

0=disable

(default),

1=enable

Output data format:

00 = offset binary,

01 = twos complement

(default),

10 = gray code,

11 = reserved

0x01

Data output modes (local).

0x015 OUTPUT_ADJUST LVDS output

standard:

0 = ANSI-644

(default),

1 = IEEE 1596.3

(low power)

LVDS drive

strength

enable:

0=disable

(default),

1=enable

LVDS drive current:

000 = 3.72 mA,

001 = 3.5 mA (default),

010 = 3.30 mA,

011 = 2.96 mA,

100 = 2.82 mA,

101 = 2.57 mA,

110 = 2.27 mA,

111 = 2.0 mA (reduced range)

0x61

Data output levels (global).

AD9670EBZ Datasheet(PDF) 42 Page - Analog Devices

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