Data Sheet

ADRF6521

Rev. 0 | Page 3 of 33

SPECIFICATIONS

For single-supply operation, VPOS = 5 V, VNEG = 0 V nominal, and VOCM = 2.5 V, and for dual-supply operation, VPOS = 3 V, VNEG =

on VOCM, OFS1, and OFS2 are with respect to COMM (analog ground).

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

FREQUENCY RESPONSE

Single-supply operation

±1 dB Gain Flatness Bandwidth

Channel 1 or 2, maximum gain

2.5

GHz

−3 dB Bandwidth

Maximum gain

3.25

GHz

Pass-Band Flatness

Defined as difference between value at 100 kHz and

1 GHz

0.5

dB

Gain Matching

Channel A and Channel B at same gain

Less than 1 GHz

±0.2

dB

Less than 3 GHz

±0.4

dB

Group Delay

Variation

From 500 MHz to 1 GHz

0.1

ns

Matching

Frequency = 1 GHz

±25

ps

Frequency = 3 GHz

±40

ps

INPUT STAGE

INP1, INM1, INP2, INM2

Maximum Input Swing

At minimum gain, VGN = 0 V

8

V p-p

Differential Input Impedance

100

Ω

Input Common-Mode

(VPOS + VNEG)/2, ac coupling recommended

VOCM undriven, single-supply operation

2.5

V

VOCM undriven, dual-supply operation

0.5

V

GAIN CONTROL

VGN (ground referenced)

Voltage Range1, 2

Minimum

0

V

Maximum

1.5

V

Voltage Gain

VGN = 1.5 V, maximum gain

18

dB

VGN = 0 V, minimum gain

−3

dB

Attenuation Range

21

dB

>20

dB

Gain Slope

45

mV/dB

Gain Error

0.2

dB

VGA Step Response Time

Through full attenuator range

Rise Time

From 10% to 90% of output

240

ns

Fall Time

From 90% to 10% of output

250

ns

COMMON-MODE CONTROL3

VOCM (VPOS and VNEG supply referenced)

Default Value

VOCM floating (nominal)

V

Voltage Range1

Minimum

– 1

V

Maximum

+ 1

V

Output Common Mode4

VOCM = 0 V

0

V

VOCM = 0.2 V

200

mV

VOCM = −0.2 V

−200

mV

VOCM = ±0.3 V, functional maximum

±300

mV

DC OFFSET CONTROL

OFS1 and OFS2 (ground referenced)

Voltage Range1, 2

Minimum

0

V

Maximum

1.5

V