Electrical characteristics (continued) – Rainbow Electronics MAX9860 User Manual
Page 6
MAX9860
16-Bit Mono Audio Voice Codec
6
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
DVDD
= V
DVDDIO
= +1.8V, R
L
=
∞, headphone load (R
L
) connected between OUTP and OUTN, C
REF
= 2.2µF, C
MICBIAS
=
C
PREG
= C
REG
= 1µF, A
VPRE
= +20dB, A
VMICPGA
= 0dB, MCLK = 13MHz, LRCLK = 8kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MICROPHONE AMPLIFIER
PAM = 00
Off
PAM = 01
-0.5
0
+0.5
PAM = 10
19
20
21
Preamplifier Gain
A
VPRE
T
A
= +25°C
PAM = 11
29
30
31
dB
PGAM = 0x14–0x1F
0
MIC PGA Gain
A
VMICPGA
PGAM = 0x00
+20
dB
MIC PGA Gain Step Size
1
dB
Common-Mode Rejection Ratio
CMRR
V
IN
= 100mV
P-P
at 217Hz
50
dB
MIC Input Resistance
R
IN_MIC
All gain settings, measured at
MICLN/MICRN
30
50
k
Ω
MIC Input Bias Voltage
0.7
0.8
0.9
V
A
VPRE
= 0dB, A
VMICPGA
= 0dB,
V
IN
= 1V
P-P
, f = 1kHz
-75
dB
Total Harmonic Distortion + Noise
THD+N
A
VPRE
= +30dB, A
VMICPGA
= 0dB,
V
IN
= 31mV
P-P
, f = 1kHz
-66
dB
AVDD = 1.7V to 1.9V
60
95
dB
V
RIPPLE
= 100mV at 1kHz, input referred
82
dB
MIC Power-Supply Rejection
Ratio
PSRR
V
RIPPLE
= 100mV at 10kHz, input referred
76
dB
MICROPHONE BIAS
MICBIAS Output Voltage
V
MICBIAS
I
LOAD
= 1mA, T
A
= +25°C
1.5
1.55
1.6
V
Load Regulation
I
LOAD
= 1mA to 2mA
0.2
10
mV
V
RIPPLE
= 100mV
P-P
at 217Hz
82
dB
MICBIAS Line Ripple Rejection
LRR
V
RIPPLE
= 100mV
P-P
at 10kHz
81
dB
MICBIAS Noise Voltage
A-weighted
9.5
µV
RMS
AUTOMATIC GAIN CONTROL
AGC Hold Duration
AGCHLD[1:0] setting range, FREQ
≠ 0
50
400
ms
AGC Attack Time
AGCATK[1:0] setting range, FREQ
≠ 0
3
200
ms
AGC Release Time
AGCRLS[2:0] setting range, FREQ
≠ 0
0.078
10
s
AGC Threshold Level
AGCSTH[3:0] setting range, FREQ
≠ 0
-3
-18
dB
NOISE GATE
NG Attack and Release Time
0.5
s
NG Threshold Level
-72
-16
dB
Noise Gate Threshold Step Size
4
dB
NG Attenuation
0
12
dB
DIGITAL SIDETONE
Sidetone Gain Adjust
DVST
2dB steps
-60
0
dB
8kHz
2.2
Sidetone Phase Delay
PDLY
MIC input to headphone
output, f = 1kHz, HP filter
disabled
16kHz
1.1
ms