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AD8341

1.5 GHz to 2.4 GHz RF Vector Modulator

Analog Devices 

AD8341

SPECIFICATIONS

VS = 5 V, TA = 25°C, ZO = 50 Ω, f = 1.9 GHz, single-ended, ac-coupled source drive to RFIP through 1.2 nH series inductor, RFIM

ac-coupled through 1.2 nH series inductor to common, differential-to-single-ended conversion at output using 1:1 balun.

Table 1.

Parameter

Conditions

Min Typ Max Unit

OVERALL FUNCTION

Frequency Range

1.5

2.4 GHz

Maximum Gain

Maximum gain setpoint for all phase setpoints

−4.5

dB

Minimum Gain

VBBI = VBBQ = 0 V differential

(at recommended common-mode level)

−34.5

dB

Gain Control Range

Relative to maximum gain

30

dB

Phase Control Range

Over 30 dB control range

360

Degrees

Gain Flatness

Over any 60 MHz bandwidth

0.5

dB

Group Delay Flatness

Over any 60 MHz bandwidth

50

ps

RF INPUT STAGE

RFIM, RFIP (Pins 21 and 22)

Input Return Loss

From RFIP to CMRF (with 1.2 nH series inductors)

12

dB

CARTESIAN CONTROL INTERFACE (I AND Q) IBBP, IBBM, QBBP, QBBM (Pins 16, 15, 3, 4)

Gain Scaling

2

1/V

Modulation Bandwidth

500 mV p-p, sinusoidal baseband input single-ended

230

MHz

Second Harmonic Distortion

500 mV p-p, 1 MHz, sinusoidal baseband input differential

41

dBc

Third Harmonic Distortion

500 mV p-p, 1 MHz, sinusoidal baseband input differential

47

dBc

Step Response

For gain setpoint from 0.1 to 0.9

(VBBP = 0.5 V, VBBM = 0.55 V to 0.95 V)

45

ns

For gain setpoint from 0.9 to 0.1

(VBBP = 0.5 V, VBBM = 0.95 V to 0.55 V)

45

ns

Recommended Common-Mode Level

0.5

V

RF OUTPUT STAGE

RFOP, RFOM (Pins 9, 10)

Output Return Loss

Measured through balun

7.5

dB

f = 1.9 GHz

Gain

Maximum gain setpoint

−4.5

dB

Output Noise Floor

Maximum gain setpoint, no input

−150.5

dBm/Hz

PIN = 0 dBm, frequency offset = 20 MHz

−149

dBm/Hz

Output IP3

f1 = 1900 MHz, f2 = 1897.5 MHz, maximum gain setpoint

17.5

dBm

Adjacent Channel Power

CDMA2000, single carrier, POUT = -4 dBm,

maximum gain, phase setpoint = 45° (See Figure 35)

−76

dBm

Output 1 dB Compression Point

Maximum gain

8.5

dBm

POWER SUPPLY

VPS2 (Pins 5, 6, and 14), VPRF (Pins 19 and 24),

RFOP, RFOM (Pins 9 and 10)

Positive Supply Voltage

4.75 5

5.25 V

Total Supply Current

Includes load current

105 125 145 mA

OUTPUT DISABLE

DSOP (Pin 13)

Disable Threshold

(See Figure 24)

Vs/2

V

Attenuation

DSOP = 5 V

33

dB

Enable Response Time

Delay following high-to-low transition until

RF output amplitude is within 10% of final value.

30

ns

Disable Response Time

Delay following low-to-high transition until

device produces full attenuation

15

ns

Rev. 0 | Page 3 of 20

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