AD9278BBCZ datasheet(5/45 Pages) AD

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AD9278

Data Sheet

Rev. A | Page 4 of 44

Parameter1

Test Conditions/Comments

Min

Typ

Max

Unit

Input-Referred Noise Voltage

GAIN+ = 1.6 V, RFB = ∞

LNA gain = 15.6 dB

1.7

nV/√Hz

LNA gain = 17.9 dB

1.5

nV/√Hz

LNA gain = 21.3 dB

1.3

nV/√Hz

Noise Figure

GAIN+ = 1.6 V, RS = 50 Ω

Active Termination Matched

LNA gain = 15.6 dB, RFB = 200 Ω

9.2

LNA gain = 17.9 dB, RFB = 250 Ω

7.7

LNA gain = 21.3 dB, RFB = 350 Ω

6.3

Unterminated

LNA gain = 15.6 dB, RFB = ∞

6.7

LNA gain = 17.9 dB, RFB = ∞

5.7

LNA gain = 21.3 dB, RFB = ∞

4.9

Correlated Noise Ratio

No signal, correlated/uncorrelated

−30

Output Offset

−35

+35

LSB

Signal-to-Noise Ratio (SNR)

fIN = 5 MHz at −10 dBFS, GAIN+ = 0 V,

dBFS

fIN = 5 MHz at −1 dBFS, GAIN+ = 1.6 V

dBFS

Harmonic Distortion

Second Harmonic

fIN = 5 MHz at −10 dBFS, GAIN+ = 0 V

−70

dBc

fIN = 5 MHz at −1 dBFS, GAIN+ = 1.6 V

−70

dBc

Third Harmonic

fIN = 5 MHz at −10 dBFS, GAIN+ = 0 V

−70

dBc

fIN = 5 MHz at −1 dBFS, GAIN+ = 1.6 V

−70

dBc

Two-Tone Intermodulation (IMD3)

fRF1 = 5.015 MHz, fRF2 = 5.020 MHz,

ARF1 = 0 dB, ARF2 = −20 dB, GAIN+ =

1.6 VIMD3 relative to ARF2

−70

dBc

Channel-to-Channel Crosstalk

fIN1 = 5.0 MHz at −1 dBFS

−60

Overrange condition2

−55

Channel-to-Channel Delay

Variation

Full TGC path, fIN = 5 MHz, GAIN+ = 0 V to

1.6 V

0.3

Degrees

PGA Gain

Differential input to differential output

21/24/27/30

GAIN ACCURACY

25°C

Gain Law Conformance Error

0 < GAIN+ < 0.16 V

0.5

0.16 V < GAIN+ < 1.44 V

−1.6

+1.6

1.44 V < GAIN+ < 1.6 V

0.5

Linear Gain Error

GAIN+ = 0.8 V, normalized for ideal AAF

loss

−1.6

+1.6

Channel-to-Channel Matching

0.16 V < GAIN+ < 1.44 V

0.1

GAIN CONTROL INTERFACE

Control Range

Differential

−0.8

+0.8

Single-ended

1.6

Gain Range

GAIN+ = 0 V to 1.6 V

Scale Factor

dB/V

Response Time

45 dB change

750

Gain+ Impedance

Single-ended

MΩ

Gain− Impedance

Single-ended

kΩ

CW DOPPLER MODE

LO Frequency

fLO = f4LO/4

MHz

Phase Resolution

Per channel

22.5

Degrees

Output DC Bias (Single-Ended)

CWI+, CWI−, CWQ+, CWQ−

1.5

Output AC Current Range

Per CWI+, CWI−, CWQ+, CWQ−, each

channel enabled

±1.25

Transconductance (Differential)

Demodulated IOUT/VIN, per CWI+, CWI−,

CWQ+, CWQ−

LNA gain = 15.6 dB

1.8

mA/V

LNA gain = 17.9 dB

2.4

mA/V

LNA gain = 21.3 dB

3.5

mA/V

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