AD9670BBCZ datasheet(49/53 Pages) AD

49 / 53 page

AD9670

Data Sheet

Rev. A | Page 48 of 52

Addr.

(Hex)

Bit 7 (MSB)

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0 (LSB)

Default

Value

Comments

0x116

ANALOG_TEST_

TONE

Analog test signal

amplitude

(see Table 17 to Table 19)

Analog test signal

frequency

00 = fSAMPLE/4 (default)

01 = fSAMPLE/8

10 = fSAMPLE/16

11 = fSAMPLE/32

0x00

Analog test tone

amplitude and

frequency (global).

0x117

DIG_SINE_TEST_

FREQ

Digital test tone frequency

0 0000 = 1 × fSAMPLE/64

0 0001 = 2 × fSAMPLE/64

…

1 1111 = 32 × fSAMPLE/64

0x00

Digital sine test

tone frequency

(global).

0x118

DIG_SINE_TEST_

AMP

Digital test tone amplitude

0000 = AFULL SCALE (default)

0001 = AFULL SCALE/2

0010 = AFULL SCALE/22

…

1111 = AFULL SCALE/215

0x00

Digital sine test

tone amplitude

(global).

0x119

DIG_SINE_TEST_

OFFSET

Offset multiplier (a)

0 1111 = +15

0 1110 =+14

…

0 0000 = 0 (default)

1 1111 = −1

…

1 0000 = −16

Offset exponent (b)

000 = 0 (default)

001 = 1

…

111 = 7

0x00

Digital sine test

tone offset

(global).

Offset = AFULL-SCALE × a × 2 − (13 − b)

Offset range is ~0.5 dB

Maximum positive offset = 15 × 2 − (13 − 7) = +0.25 × AFULL SCALE

Maximum negative offset = –16 × 2 − (13 − 7) ≈ –0.25 × AFULL SCALE

0x11A

TEST_MODE_

CH_ENABLE

Channel H

enable

0 = off

(default)

1 = on

Channel G

enable

0 = off

(default)

1 = on

Channel F

enable

0 = off

(default)

1 = on

Channel E

enable

0 = off

(default)

1 = on

Channel D

enable

0 = off

(default)

1 = on

Channel C

enable

0 = off

(default)

1 = on

Channel B

enable

0 = off

(default)

1 = on

Channel A

enable

0 = off

(default)

1 = on

0x00

Enable channels

for test mode

(global).

0x11B

TEST_MODE_

CONFIG

Test mode selection

000 = disable test modes (default)

001 = enable digital sine test mode

010 = enable decimator filter test

(output of decimator is the sequence

of filter coefficients)

011 = enable channel ID test mode

16-bit data = digital ramp (7 bits) +

I/Q bit + Channel ID (3 bits) +

Chip Address (5 bits)

100 = enable analog test tone

101 = reserved

110 = reserved

111 = reserved

0x00

Enable digital test

modes (global).

0x11C

RESERVED_11C

0x00

Reserved.

0x11D

RESERVED_11D

0x00

Reserved.

0x11E

RESERVED_11E

0x00

Reserved.

0x11F

RESERVED_11F

0x00

Reserved.

0x120

CW_TEST_TONE

CW I/Q

output

swap

0 =

disable

(default)

1 =

enable

LNA offset

cancel-

lation

0 = enable

(default)

1 = disable

LNA offset cancellation

transconductance

00 = 0.5 mS (default)

01 = 1.0 mS

10 = 1.5 mS

11 = 2.0 mS

CW analog test tone

override for Reg. 0x116,

Bits[1:0]

00 = disable override

(default)

01 = set analog test

tone frequency to fLO

1X = set analog test

tone frequency to dc

0x00

Sets the frequency

of the analog test

tone to fLO in CW

Doppler mode.

Enables I/Q output

swap. LNA offset

cancellation

control (global).

0x180

RESERVED_180

0x87

Reserved.

0x181

RESERVED_181

0x00

Reserved.

0x182

PLL_STARTUP

PLL auto

configure

0 = disable

(default)

1 = enable

0x02

PLL control

(global).

0x183

RESERVED_183

0x07

Reserved.

0x184

RESERVED_184

0x00

Reserved.

0x186

RESERVED_186

0xAE

Reserved.

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