AD6458

–3–

REV. 0

ABSOLUTE MAXIMUM RATINGS

1

Supply Voltage VPS1, VPS2 to COM1, COM2 . . . . . +3.6 V

Internal Power Dissipation

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

°C to +85°C

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

°C to +150°C

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

°C

NOTES

nent damage to the device. This is a stress rating only; 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

°C/W.

ORDERING GUIDE

Temperature

Package

Package

Model

Range

Description

Option

AD6458ARS –40

°C to +85°C 20-Lead Shrink Small Outline RS-20

PIN FUNCTION DESCRIPTIONS

Pin

Pin

Number

Label

Description

Function

1

FREF

Frequency Reference Input

Demodulation LO Input. May be 3 V CMOS input or >100 mV ac coupled for

lowest stand by current.

2

COM1

Common 1

Ground.

3

PRUP

Power-Up Input

CMOS compatible power up control; 0 = OFF, 3 V = ON.

4

LOIP

Local Oscillator Input

AC coupled LO input. Only 50 mV drive needed, 500 mV max.

5

RFLO

RF “Low” Input

Usually connected to ac ground.

6

RFHI

RF “High” Input

AC coupled, –109 dBV to –29 dBV RF input from 1 k

Ω filter for optimal operation.

7

COM2

Common 2

Ground.

8

GREF

Gain Reference Input

High impedance input, sets gain scaling, typically 1.2 V.

9

MXOP

Mixer Output

Output of the Mixer.

10

NC

Not internally connected. Should be grounded.

11

IFIP

IF Input “Plus”

Differential Input of variable gain amplifier.

12

IFIM

IF Input “Minus”

Differential Input of variable gain amplifier.

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.

15

QRXP

Q Output “Positive”

Differential Q Output.

16

IRXN

I Output “Negative”

Differential I Output.

17

IRXP

I Output “Positive”

Differential I Output.

18

VPS2

VPOS Supply 2

Supply Voltage.

19

FLTR

PPL Loop Filter

Series RC loop filter, connected to VPS2.

20

VPS1

VPOS Supply 1

Supply Voltage.

PIN CONNECTION

20-Lead 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)

AD6458

FREF

IRXP

VPS2

FLTR

VPS1

COM1

PRUP

LOIP

QRXN

QRXP

IRXN

RFLO

RFHI

COM2

GREF

MXOP

NC

IFIP

IFIM

GAIN

NC = NO CONNECT

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 AD6458 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.