AD9675KBCZ datasheet(5/61 Pages) AD

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AD9675

Data Sheet

Rev. A | Page 4 of 60

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, low bandwidth mode, RS = 50 Ω, RFB = ∞ (unterminated), LNA gain = 21.6 dB, LNA bias = mid-high, PGA gain = 27 dB, analog

gain control, VGAIN (V) = (GAIN+) − (GAIN−) = 1.6 V, AAF LPF cutoff = fSAMPLE/3 (Mode I/Mode II) = fSAMPLE/4.5 (Mode III/Mode IV),

HPF cutoff = LPF cutoff/12.00, Mode I = fSAMPLE = 40 MSPS, Mode II = fSAMPLE = 65 MSPS, Mode III = fSAMPLE = 80 MSPS, Mode IV = 125 MSPS,

RF decimator bypassed (Mode I/Mode II), RF decimator enabled (Mode III/Mode IV), digital high-pass filter bypassed, JESD204B link

parameters: M = 8 and L = 2, 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).

Table 1.

Parameter1

Test Conditions/Comments

Min

Typ

Max

Unit

LNA CHARACTERISTICS

Gain

Single-ended input to differential output

15.6/17.9/21.6

Single-ended input to single-ended output

9.6/11.9/15.6

0.1 dB Input Compression Point

LNA gain = 15.6 dB

1000

mV p-p

LNA gain = 17.9 dB

750

mV p-p

LNA gain = 21.6 dB

450

mV p-p

1 dB Input Compression Point

LNA gain = 15.6 dB

1200

mV p-p

LNA gain = 17.9 dB

900

mV p-p

LNA gain = 21.6 dB

600

mV 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, LNA gain = 21.6 dB

RFB = 1350 Ω, LNA gain = 21.6 dB

200

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 Signal-to-Noise Ratio

Noise bandwidth = 15 MHz

Input Noise Current

2.6

pA/√Hz

FULL CHANNEL CHARACTERISTICS

Time gain control (TGC)

AAF Low-Pass Cutoff

−3 dB, programmable, low bandwidth mode

MHz

−3 dB, programmable, high bandwidth mode

13.5

MHz

In Range AAF Bandwidth

Tolerance

±10

Group Delay Variation

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

±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

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, RFB = ∞

3.2

LNA gain = 17.9 dB, RFB = ∞

2.9

LNA gain = 21.6 dB, RFB = ∞

2.6

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