AD9674KBCZ datasheet(5/48 Pages) AD

5 / 48 page

AD9674

Data Sheet

Rev. A | Page 4 of 47

SPECIFICATIONS

AC SPECIFICATIONS

AVDD1 = 1.8 V, AVDD2 = 3.0 V, DVDD = 1.4 V, DRVDD = 1.8 V, 1.0 V internal ADC reference, full temperature range (0°C to 85°C),

fIN = 5 MHz, local oscillator (LO) band mode, RS = 50 Ω, RFB = ∞ (unterminated), LNA gain = 21.6 dB, LNA bias = midhigh, programmable gain

amplifier (PGA) gain = 27 dB, analog gain control, VGAIN = (GAIN+) − (GAIN−) = 1.6 V, AAF LPF cutoff = fSAMPLE/3 in Mode I1/Mode II,1 AAF

LPF cutoff = fSAMPLE/4.5 in Mode III1/Mode IV,1 HPF cutoff = LPF cutoff/12.00, Mode I1 = fSAMPLE = 40 MSPS, Mode II1 = fSAMPLE = 65 MSPS,

Mode III1 = fSAMPLE = 80 MSPS, Mode IV1 = fSAMPLE = 125 MSPS, RF decimator bypassed, digital filter bypassed, and low power LVDS mode,

unless otherwise noted. All gain setting options are listed, which can be configured via SPI registers, and all power supply currents and power

dissipations are listed for the four mode settings (Mode I, Mode II, Mode III, and Mode IV).1

Table 1.

Parameter2

Test Conditions/Comments

Min

Typ

Max

Unit

LNA CHARACTERISTICS

Gain

Single-ended input to differential output

15.6/17.9/21.63

Single-ended input to single-ended

output

9.6/11.9/15.63

0.1 dB Input Compression Point

LNA gain = 15.6 dB

1.00

V p-p

LNA gain = 17.9 dB

0.75

V p-p

LNA gain = 21.6 dB

0.45

V p-p

1 dB Input Compression Point

LNA gain = 15.6 dB

1.20

V p-p

LNA gain = 17.9 dB

0.90

V p-p

LNA gain = 21.6 dB

0.60

V p-p

Input Common Mode (LI-x, LG-x)

2.2

Output Common Mode (LO-x)

Switch off

High-Z

Switch on

1.5

Output Common Mode (LOSW-x)

Switch off

High-Z

Switch on

1.5

Input Resistance (LI-x)

RFB = 300 Ω

RFB = 1350 Ω

200

RFB = ∞ (unterminated)

kΩ

Input Capacitance (LI-x)

Input Referred Noise Voltage

RS = 0 Ω

LNA gain = 15.6 dB

0.83

nV/√Hz

LNA gain = 17.9 dB

0.82

nV/√Hz

LNA gain = 21.6 dB

0.78

nV/√Hz

Input SNR

Noise bandwidth = 15 MHz,

LNA gain = 21.6 dB

Input Referred Noise Current

2.6

pA/√Hz

FULL CHANNEL (TGC) CHARACTERISTICS

AAF Low-Pass Cutoff

−3 dB, programmable, low band mode

MHz

−3 dB, programmable, high band mode

13.5

MHz

In Range AAF Bandwidth Tolerance

±10

Group Delay Variation

f = 1 MHz to 18 MHz, VGAIN = −1.6 V to +1.6V

±350

Input Referred Noise Voltage

LNA gain = 15.6 dB

0.96

nV/√Hz

LNA gain = 17.9 dB

0.90

nV/√Hz

LNA gain = 21.6 dB

0.82

nV/√Hz

Noise Figure

RS = 50 Ω

Active Termination Matched

LNA gain = 15.6 dB, RFB = 150 Ω

5.6

LNA gain = 17.9 dB, RFB = 200 Ω

4.8

LNA gain = 21.6 dB, RFB = 300 Ω

3.8

Unterminated

LNA gain = 15.6 dB

3.2

LNA gain = 17.9 dB

2.9

LNA gain = 21.6 dB

2.6

Correlated Noise Ratio

No signal, correlated/uncorrelated

−30

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