AD6459

–11–

REV. 0

14

13

12

11

17

16

15

20

19

18

10

9

8

1

2

3

4

7

6

5

AD6459

FREF

IRXP

VPS2

FLTR

VPS1

COM1

PRUP

LOIP

QRXN

QRXP

IRXN

RFLO

RFHI

COM2

GREF

MXOP

MXOM

IFIP

IFIM

GAIN

R1

20k

Ω

VPOS

C1

0.1µF

C10 1nF

R8 1k

Ω

C11

0.1µF

C9

10nF

FREF

R9

50

Ω

R2

50

Ω

LOIP

RFHI

GREF

R3

50

Ω

C12

1nF

C4 1nF

C7

1nF

VPOS

IRXP

QRXN

QRXP

IRXN

GAIN

C2

1nF

C3

SHORT

C5

0.1µF

JUMPER

VPOS

R6

24.9k

Ω

R7

16.9k

Ω

L3

SHORT

C16

22pF

C15

110pF

L2

0.56µH

PRUP

GND

GREF

L4

SHORT

C17

22pF

Figure 27. Evaluation Board as Received with 19.5 MHz Filter

Table II. AD6459 Evaluation Board Input and Output Connection

Reference

Connector

Approximate

Designation

Type

Description

Coupling

Signal Level

Comments

RFHI

SMA

RF Input

AC

–11 dBm max

Input Is Terminated

in 50

Ω

LOIP

SMA

LO Input

AC

500 mV p-p max

Input Is Terminated

in 50

Ω

FREF

SMA

Demodulator Reference

AC

100 mV p-p min

Input Is Terminated

Input

in 50

Ω

MXOP

SMA

Mixer Output

NA

NA

Not Connected

for Unbalanced Output

Use XFMR

IFIP

SMA

IF Input

NA

NA

Not Connected

for Unbalanced Output

Use XFMR

J1

Jumper

On-Board GREF Bias

DC

Two Resistors Divider

GREF

J2-1

External Reference Input

DC

1.2 V dc

Gain Scaling Reference

from External ADC

GAIN

J2-2

Gain Bias Input

DC

0.2 V to 2.4 V dc

Maw Gain at 0.2 V

QRXN

J2-3

Q-Negative Output

DC–2 MHz

NA

Z Series = 4.7 k

Ω

QRXP

J2-4

Q-Positive Output

DC–2 MHz

NA

Z Series = 4.7 k

Ω

IRXN

J2-5

I-Negative Output

DC-2 MHz

NA

Z Series = 4.7 k

Ω

IRXP

J2-6

I-Positive Output

DC-2 MHz

NA

Z Series = 4.7 k

Ω

VPOS

J2-7

Power Supply

DC

2.7 V to 5.5 V

Supply Voltage

Positive Input

PRUP

J2-8

Power Up

DC-2 MHz

CMOS

If Left Unconnected,

Board Is Active

GND

J2-J9

Ground

DC

0 V

NA

GND

J2-10

Ground

DC

0 V

NA