5.5 Electrical Characteristics Low Noise Amplifier (LNA)

at TA = 25°C, VCC = 3.3V to 5V, LNA_Out = 1kΩ to AGND, RSOURCE = 50Ω, and input ac coupling capacitor (CIN) = 10nF

(unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DC PERFORMANCE

GLNA

Internal gain

11

V/V

Internal gain error

TA = –40°C to +125°C

±0.8

±1

%

AC PERFORMANCE

SSBW

Small-signal bandwidth

LNA_Out = 20mVPP

39

MHz

LSBW

Large-signal bandwidth

36

MHz

SR

Slew rate

2V step at LNA_Out

200

V/µs

Total input referred noise

f > 100kHz, includes gain and bias resistors

2.6

nV/√Hz

Overdrive recovery time

2 × output overdrive

1

µs

Capacitive drive(1)

< 3dB of peaking

∞

nF

INPUT

VLNA_In

Linear input voltage

VCC = 5V

200

mVP

VCC = 3.3V

140

VBIAS

Internal bias voltage

At LNA_In, TA = –40°C to +125°C

VCC ×

0.044

mV

Input impedance of LNA

1.7 || 1.8

kΩ || pF

OUTPUT

Output bias point of LNA

LNA_In = open

VBIAS × 11

V

Output impedance of LNA

0.850

1

1.150

kΩ

POWER SUPPLY

Quiescent operating current

LNA_Out = Open

2

2.7

mA

TA = –40°C to +125°C

3

POWER DOWN

LNA enable voltage threshold

VCC −

1.2

V

LNA disable voltage threshold

GND + 0.6

V

Turn-on time

Time from disable to enable

50

µs

Turn off time

Time from enable to disable

130

ns

(1)

Infinite capacitive drive possible due to presence of 1kΩ of isolation resistor

LOG300

SLOSEB7A – SEPTEMBER 2024 – REVISED OCTOBER 2024

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