AD9670BBCZ datasheet(5/53 Pages) AD

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AD9670

Data Sheet

Rev. A | Page 4 of 52

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, PGA gain = 27 dB,

analog gain control, VGAIN = (GAIN+) − (GAIN−) = 1.6 V, antialiasing filter, low-pass filter (LPF) cutoff = fSAMPLE/3 in Mode I/Mode II,

antialiasing filter LPF cutoff = fSAMPLE /4.5 in Mode III/Mode IV, high-pass filter (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, radio frequency (RF) decimator bypassed, digital demod-

ulator and baseband decimator bypassed, digital high-pass filter bypassed, 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), respectively, via slashes in Table 1.

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

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

LOSW-x

Switch off

High-Z

Switch on

1.5

Input Resistance (LI-x)

RFB = 300 Ω

RFB = 1350 Ω

200

kΩ

Input Capacitance (LI-x)

Input 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 Noise Current

2.6

pA/√Hz

FULL CHANNEL (TGC) CHARACTERISTICS

Antialiasing Filter Low-Pass Cutoff

−3 dB, programmable, low band mode

MHz

−3 dB, programmable, high band mode

13.5

MHz

In Range Antialiasing Filter

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

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

Output Offset

−100

+100

LSB

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