AD6459

–3–

REV. 0

WARNING!

ESD SENSITIVE DEVICE

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily

accumulate on the human body and test equipment and can discharge without detection.

Although the AD6459 features proprietary ESD protection circuitry, permanent damage may

occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD

precautions are recommended to avoid performance degradation or loss of functionality.

ABSOLUTE MAXIMUM RATINGS

1

Supply Voltage VPS1, VPS2 to COM1, COM2 . . . . . +5.5 V

Internal Power Dissipation

2

. . . . . . . . . . . . . . . . . . . 600 mW

Operating Temperature Range . . . . . . . . . . . –40

°C to +85°C

Storage Temperature Range . . . . . . . . . . . . –65

°C to +150°C

Lead Temperature, Soldering (60 sec) . . . . . . . . . . . . +300

°C

NOTES

permanent damage to the device. This is a stress rating only, and functional

operation of the device at these or any other conditions above those indicated in the

operational section of this specification is not implied. Exposure to absolute

maximum rating conditions for extended rating conditions for extended periods

may affect device reliability.

θ

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

AD6459ARS

–25

°C to +85°C

20-Pin Plastic

RS-20

for 2.7 V to 5.5 V

SSOP

–40

°C to +85°C

for 3.3 V to 5.5 V

PIN DESCRIPTIONS

Pin

Pin

Label

Description

Function

1

FREF

Frequency Reference Input

Demodulation LO Input. May either be 3 V CMOS input or >100 mV p-p.

AC-coupled for lowest stand by current.

2

COM1

Common 1

Ground.

3

PRUP

Power Up Input

CMOS Compatible Power-Up Control; <1.5 V = OFF, >1.5 V = ON.

4

LOIP

Local Oscillator Input

AC-Coupled LO Input. 50 mV p-p drive needed, 500 mV p-p max.

5

RFLO

RF “Low” Input

Mixer Differential Input. AC-coupled.

6

RFHI

RF “High” Input

Mixer Differential Input. AC-coupled.

7

COM2

Common 2

Ground.

8

GREF

Gain Reference Input

High Impedance Input. Sets gain scaling, typically 1.2 V.

9

MXOP

Mixer Output “Plus”

Differential Output of the Mixer. See Figure 22.

10

MXOM

Mixer Output “Minus”

Differential Output of the Mixer. See Figure 22.

11

IFIP

IF Input “Plus”

Differential Input of Variable Gain Amplifier. AC-coupled.

12

IFIM

IF Input “Minus”

Differential Input of Variable Gain Amplifier. AC-coupled.

13

GAIN

Gain Control Input

0.2 V–2.4 V Using 3 V Supply. Max gain at 0.2 V.

14

QRXN

Q Output “Negative”

Differential Q Output. Output resistance 4.7 k

Ω.

15

QRXP

Q Output “Positive”

Differential Q Output. Output resistance 4.7 k

Ω.

16

IRXN

I Output “Negative”

Differential I Output. Output resistance 4.7 k

Ω.

17

IRXP

I Output “Positive”

Differential I Output. Output resistance 4.7 k

Ω.

18

VPS2

VPOS Supply 2

Supply Voltage.

19

FLTR

PLL Loop Filter

Series RC Loop Filter. Connected to VPS2.

20

VPS1

VPOS Supply 1

Supply Voltage.

PIN CONNECTION

20-Pin SSOP (RS-20)

14

13

12

11

17

16

15

20

19

18

10

9

8

1

2

3

4

7

6

5

TOP VIEW

(Not to Scale)

AD6459

FREF

IRXP

VPS2

FLTR

VPS1

COM1

PRUP

LOIP

QRXN

QRXP

IRXN

RFLO

RFHI

COM2

GREF

MXOP

MXOM

IFIP

IFIM

GAIN