WM7120IMS/RV Wolfson Microelectronics, WM7120IMS/RV Datasheet - Page 5

• Manufacturer Part Number: WM7120IMS/RV
• Description: IC, MICROPHONE, MEMS, ANALOG SM
• Manufacturer: Wolfson Microelectronics

Specifications of WM7120IMS/RV

• Brief Features: Low Supply Current, Automated Flow Solder Assembly
• Operating Temperature Range: -40°C To +100°C
• Digital Ic Case Style: SMD
• No. Of Pins: 4
• Svhc: No SVHC (15-Dec-2010)
• Package /: RoHS Compliant
• Ic Function: Analogue Silicon Microphone
• Supply Voltage Range: 1.5V To 3.7V
• Rohs Compliant: Yes

Pre-Production
ACOUSTIC AND ELECTRICAL CHARACTERISTICS
TERMINOLOGY
1.
2.
3.
w
Test Conditions: VDD=2.1V, T
PARAMETER
Directivity
Sensitivity
Current Consumption
Total Harmonic Distortion
Signal to Noise Ratio
Input Referred Noise
Power Supply Rejection Ratio
Output DC Impedance
Minimum Load Impedance
Acoustic Overload
Signal-to-Noise Ratio (dB) – SNR is a measure of the ratio between the sensitivity of the microphone to a 94dB SPL
sine wave and the A-Weighted analogue idle noise.
Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative
to the amplitude of the applied sound pressure level.
All performance measurements carried out with 20 kHz low pass filter, and where noted an A-weighted filter. Failure to
use such a filter will result in higher THD and lower SNR readings than are found in the Acoustic and Electrical
Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic
specification values.
A
= 25°C
SYMBOL
PSRR
SNR
THD
ENL
Z
I
VDD
OUT
S
1kHz 104dB SPL
1kHz 94dB SPL
A-
A-
(0dB = 1V/Pa)
20Hz – 20kHz
20Hz – 20kHz
CONDITIONS
THD < 10%
TEST
Weighted
Weighted
MIN
-45
-43
40
Omni-directional
0.25
TYP
140
100
125
-42
-42
59
35
50
20
MAX
190
-39
-41
PP, Rev 3.0, May 2009
dB SPL
dB SPL
UNIT
dB
dB
μA
dB
dB
kΩ
%
Ω
WM7120
Enhanced
Standard
NOTE
5