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AD8348

Rev. A | Page 4 of 28

Parameter

Conditions

Min

Typ

Max

Unit

IF FRONT END WITHOUT VGA

From MXIP, MXIN to IMXO (QMXO),

ENVG = 0 V, IMXO/QMXO load = 1.5 kΩ

Input Impedance

Measured differentially across MXIP/MXIN

200||1.5

Ω||pF

Conversion voltage Gain

10.5

3 dB Output Bandwidth

MHz

IF Gain Flatness

FIF = 380 MHZ ± 5%

0.1

dB p-p

FIF = 900 MHZ ± 5%

0.15

dB p-p

Input 1 dB Compression Point (P1dB)

−4

dBm

Third-Order Input Intercept (IIP3)

IF1 = 381 MHz, IF2 = 381.02 MHz

dBm

Each tone 10 dB below P1dB from

200 Ω source

LO Leakage

Measured at MXIP/MXIN

−70

dBm

Measured at IMXO, QMXO

−60

dBm

Demodulation Bandwidth

Small signal 3 dB bandwidth

MHz

Quadrature Phase Error

LO = 380 MHz (LOIP/LOIN 760 MHz,

single-ended)

−2

±0.5

Degrees

I/Q Amplitude Imbalance

0.25

Noise Figure (Double Sideband)

From 200 Ω source, FIF = 380 MHz

I/Q BASEBAND AMPLIFIER

From IAIN to IOPP/IOPN and QAIN to QOPP/

QOPN, RLOAD = 2 kΩ, single-ended to ground

Gain

Bandwidth

10 pF differential load

125

MHz

Output DC Offset (Differential)

LO leakage offset corrected using 500 pF

capacitor on IOFS, QOFS (VIOPP − VIOPN)

−50

±12

+50

Output Common-Mode Offset

(VIOPP + VIOPN)/2 − VCMO

−75

±35

+75

Group Delay Flatness

0 MHz to 50 MHz

ns p-p

Input-Referred Noise Voltage

Frequency = 1 MHz

nV/√Hz

Output Swing Limit (Upper)

VS −1

Output Swing Limit (Lower)

0.5

Peak Output Current

Input Impedance

50||1

kΩ||pF

Input Bias Current

μA

RESPONSE FROM IF AND MX INPUTS TO

BASEBAND AMPLIFIER OUTPUT

IMXO and QMXO connected directly to

IAIN and QAIN, respectively

Gain

From MXIP/MXIN

30.5

From IFIP/IFIN, VGIN = 0.2 V

45.5

From IFIP/IFIN, VGIN = 1.2 V

1.5

CONTROL INPUT/OUTPUTS

VCMO Input Range

VS = 5 V

0.5

VS = 2.7 V

0.5

1.7

VREF Output Voltage

0.95

1.05

Gain Control Voltage Range

VGIN

0.2

1.2

Gain Slope

−55

−50

−45

dB/V

Gain Intercept

Linear extrapolation back to theoretical

gain at VGIN = 0 V

Gain Control Input Bias Current

μA

LO INPUTS

LOIP Input Return Loss

LOIN ac-coupled to ground

(760 MHz applied to LOIP)

−6

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