2

Acoustic and electrical specifications

2.1

Acoustic and electrical characteristics

The values listed in the table below are specified for Vdd = 1.8 V, Clock = 2.4 MHz, T = 25 °C, unless otherwise

noted.

Symbol

Parameter

Test condition

Min.

Typ.(1)

Max.

Unit

Vdd

Supply voltage

1.6

1.8

3.6

V

Idd

Current consumption in normal mode

Mean value

650

µA

IddPdn

Current consumption in power-down mode(2)

5

µA

Scc

Short-circuit current

1

10

mA

AOP

Acoustic overload point

122.5

dBSPL

So

Sensitivity

-29

-26

-23

dBFS

SNR

Signal-to-noise ratio

A-weighted @1 kHz,

94 dB SPL

64

dB(A)

PSR

Power supply rejection

100 mVpp sine 1 kHz

-90

dBFS

Input clock frequency(3)

1.2

2.4

3.25

MHz

Ton

Turn-on time(4)

Guaranteed by design

10

ms

Top

Operating temperature range

-40

+85

°C

Low-level logic input/output voltage

-0.3

0.35xVdd

V

High-level logic input/output voltage

0.65xVdd

Vdd+0.3

V

Capacitive load

100

pF

1. Typical specifications are not guaranteed.

2. Input clock in static mode.

3. Duty cycle: min = 40% max = 60%.

4. Time from the first clock edge to valid output data.

Parameter

Test condition

Typical value (1)

Distortion

94 dBSPL

0.2% THD + N

Distortion

110 dBSPL

0.7% THD + N

Distortion

120 dBSP

6% THD + N

1. Typical specifications are not guaranteed.

IMP34DT05

Acoustic and electrical specifications

DS12725 - Rev 3

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