4

ACE9040

Characteristic

Symbol

Value

Unit

Conditions

Min.

Typ.

Max.

Supply Current and Power Down Modes

Operating supply current

I

DD

15

mA

V

15

mA

V

Standby

Attenuation of all inputs signals

40

dB

Wakeup response time

10

ms

Sleep (Standby with CLK stopped)

Supply current*

I

DD(SLEEP)

200

µA

STBY bit set V

Delay between setting STBY bit and

20

µs

stopping clock

Delay to starting clock after wakeup

100

µs

Characteristic

Value

Unit

Conditions

Min.

Typ.

Max.

Transmission Path

Microphone Amp, MI to SLO pins

Input bias

V

Internal 150 k

Ω bias resistor to V

Microphone input gain (LO)

21

22

23

dB

MIS = 1, MLI = 0, MIG = 0

Microphone input gain (HI)

31

32

33

dB

MIS = 1, MLI = 0, MIG = 1

Microphone crosstalk (no MI signal)

– 40

dB

MIS = 1, MLI = 0, MIG = 1

Line input, LI to SLO pins

Input bias

V

Internal 100 k

Ω bias resistor

LI input Gain (0dB)

– 0.5

0.5

dB

MIS = 0, MLI = 0, MIG = 0

LI input Gain (LO)

21

22

23

dB

MIS = 1, MLI = 1, MIG = 0

LI input gain (HI)

31

32

33

dB

MIS = 1, MLI = 1, MIG = 1

LI input crosstalk (no LI signal)

– 40

dB

MIS = 1, MLI = 1, MIG = 1

Soft Deviation Limiter, LI to SLO pins

Nominal gain

0

dB

Limiter not functioning.

Attenuation range

– 30

– 29

dB

Attenuation steps

0.27

0.5

0.67

dB

Distortion

2

%THD

Output at 1 Vrms

Attack level:Hard limiter output

3

97

% V

DD

Attack level at TBPO pin

92

% V

DD

d.c. input at IPS

TEST[1:0] = 11

Attack time

40

µs

Per gain step when signal outside

threshold

Decay time

1.68

ms

Per gain step

INPSENSE Gain Stage, IPS to TBPO pins

Nominal gain

7.5

8

8.5

dB

INPS[4:0] = 15, THF = 0 dB,

Gain adjustment range

– 12

12.8

dB

Relative to nominal gain

Gain step size

0.6

0.8

1.2

dB

INPS[4:0] = 0 to 31, THF = 0 dB

ELECTRICAL CHARACTERISTICS

These characteristics are guaranteed over the following conditions unless otherwise stated (Note 1):

T

Note 1. 100% production tested at 25

°C but guaranteed over specified temperature range.

* Standby current measured with the 1.008 MHz clock stopped and SCLK at a level <200 mV.