LMV1089

SNAS441H – SEPTEMBER 2008 – REVISED MAY 2010

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OPERATING RATINGS

(1)

Supply Voltage

2.7V

1.7V

Temperature Range

−40°C to 85°C

(1)

The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as

otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and

are not ensured.

(2)

ELECTRICAL CHARACTERISTICS 3.3V

(1)

mode

LMV1089

Units

Symbol

Parameter

Conditions

(Limits)

63

dB

SNR

Signal-to-Noise Ratio

65

dB

voice band (300 – 3400Hz)

Input Referred Noise level

A-weighted

5

Maximum Input Signal

THD+N < 1%, Pre Amp Gain = 6dB

910

850

f = 1kHz, Differential Out+, Out-

Maximum AC Output Voltage

1.2

1.1

THD+N < 1%

DC Level at Outputs

Out+, Out-

800

mV

THD+N

Total Harmonic Distortion + Noise

Differential Out+ and Out-

0.1

0.2

% (max)

Input Impedance

142

k

Ω

Output Impedance

300

Ω

Load Impedance (Out+, Out-)

10

k

Ω (min)

100

pF (max)

Microphone Preamplifier Gain Range

6 – 36

dB

Microphone Preamplifier Gain

1.7

dB (min)

f = 1kHz

2

Adjustment Resolution

2.3

dB (max)

Pass Through Mode and Summing

Post Amplifier Gain Range

6 – 18

dB

Mode

2.6

dB (min)

Post Amplifier Gain Resolution

3

3.4

dB (max)

Gain Compensation Range

±3

dB

f = 300Hz

0.5

dB

Maximum Gain Matching Difference

f = 1kHz

0.25

dB

After Calibration

f = 3kHz

0.5

dB

Crosstalk Attenuation between Mic1 and

Measured at M1_UNP and M2_UNP

52

41

dB (min)

Mic2

Calibration Duration

790

ms (max)

f = 1kHz (See TEST METHODS)

32

20

dBV(min)

Far Field Noise Suppression Electrical

f = 300Hz (See TEST METHODS)

37

22

dBV (min)

Signal-to-Noise Ratio Improvement

f = 1kHz (See TEST METHODS)

24

14

dBV (min)

Electrical

f = 300Hz (See TEST METHODS)

28

15

dBV (min)

(1)

“Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of

device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or

other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating

Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. All

voltages are measured with respect to the ground pin, unless otherwise specified.

(2)

(3)

product characterization and are not specified.

(4)

Datasheet min/max specification limits are ensured by test, or statistical analysis.

6

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