ISD9300 Datasheet, PDF (22/26 Pages) List of Unclassifed Manufacturers – ISD Cortex-M0 ChipCorder

ISD9300 Datasheet
6.4.3 Specification of ALC and MICBIAS
Conditions: VCCD = 3.3V, VCCA = 3.3V, TA = 25C, 1kHz signal, fs = 16kHz, 16-bit audio data, unless otherwise
stated.
Parameter
Symbol Comments/Conditions Min Typ Max Units
Automatic Level Control (ALC) & Limiter:
Target record level
Programmable gain
Gain hold time ³
tHOLD
Gain ramp-up (decay) ³
tDCY
Gain ramp-down (attack) ³
tATK
Mute Attenuation
Microphone Bias
Doubles every gain step,
with 16 steps total
ALC Mode
ALC = 0
Limiter Mode
ALC = 1
ALC Mode
ALC = 0
Limiter Mode
ALC = 1
-22.5
-1.5
-12
35.25
0 / 2.67 / 5.33 / … / 43691
4 / 8 / 16 / … / 4096
1 / 2 / 4 / … / 1024
1 / 2 / 4 / … / 1024
0.25 / 0.5 / 1 / … / 128
120
dBFS
dB
ms
ms
ms
ms
ms
dB
Bias voltage
Bias current source
Output noise voltage
Notes:
VMICBIAS
IMICBIAS
Vn
1kHz to 20kHz
0.90, 0.65 ,0.75, 0.50,
2.4, 1.7,2.0
3
14
VDDA
V
mA
nV/√Hz
1. Full Scale is relative to the magnitude of VCCA and can be calculated as FS=VCCA/3.3.
2. Distortion is measured in the standard way as the combined quantity of distortion products plus noise. The signal level for
distortion measurement is at 3dB below full scale, unless otherwise noted.
3. Time values scale proportionally with HCLK. Complete descriptions and definitions for these values are contained in the
detailed description of the ALC functionality.
6.4.4 Specification of LDO and Power Management
PARAMETER
MIN
TYP
MAX
UNIT
Input Voltage
2.4
5
5.5
V
Output Voltage
-10%
1.8
+10%
V
NOTE
VDD input voltage
VDD> 1.8
Note:
1.
2.
It is recommended that a 10uF or higher capacitor and a 100nF bypass capacitor are connected between VCCD and the VSSD
pin of the device.
To ensure regulator stability, a 1.0uF capacitor must be connected between LDO pin and the VSSD pin of the device. Also a
100nF bypass capacitor between LDO and VSSD will help suppress output noise.
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Release Date: Oct 23, 2014
Revision V1.1