DS4420 datasheet(3/10 Pages) MAXIM

3 / 10 page

I2C Programmable-Gain Amplifier

for Audio Applications

_____________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +4.5V to +5.5V, TA = -20°C to +70°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

VOUT = VCC

Amplifier Output Current

(Sinking)

IOS2

VOUT = 0.75V

Resistive Load Range

Differential

50k

Capacitive Load

Cap to GND (Note 4)

100

Closed-Loop Bandwidth

All gain settings (Note 5)

20k

Passband Flatness

20Hz to 20kHz (Notes 2, 5)

-1

A = -35dB, 300Hz to 3.4kHz

-123

Output Noise (Note 5)

A = +25dB, 300Hz to 3.4kHz

-88

dBV

RL = 50Ω, VO ≤ +6dBV,

f = 1kHz, A = ±16dB

0.03

1.0

Total Harmonic Distortion (Note 5)

THD

RL = 1kΩ, VO ≤ +6dBV,

f = 1kHz, A = ±16dB

0.01

Gain Range

-35

+25

Gain Step Size

2.0

3.0

4.0

Gain Accuracy

AERR1

(Note 10)

-2.5

+2.5

Mute and Standby Mode Gain

AMUTE

(Note 5)

-90

Standby Mode Exit TimetPU

(Note 6)

µs

I2C AC ELECTRICAL CHARACTERISTICS (See Figure 3)

(VCC = +4.5V to +5.5V, TA = -20°C to +70°C, timing referenced to VIL(MAX) and VIH(MIN), unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SCL Clock Frequency

fSCL

(Note 7)

400

kHz

Bus Free Time Between STOP and

START Conditions

tBUF

1.3

µs

Hold Time (Repeated) START

Condition

tHD:STA

0.6

µs

Low Period of SCL

tLOW

1.3

µs

High Period of SCL

tHIGH

0.6

µs

Data Hold Time

tHD:DAT

0.9

µs

Data Setup Time

tSU:DAT

100

Start Setup Time

tSU:STA

0.6

µs

SDA and SCL Rise Time

(Note 8)

20 +

0.1CB

300

SDA and SCL Fall Time

(Note 8)

20 +

0.1CB

300

STOP Setup Time

tSU:STO

0.6

µs

SDA and SCL Capacitive Loading

(Note 8)

400

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