AK4637EN Datasheet, PDF (11/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
8. Electrical Characteristics
■ Analog Characteristics
(Ta=25C; AVDD=3.3V, TVDD=DVDD=1.8V; VSS1=VSS2=0V; fs=48kHz, BICK=64fs; Signal Frequency
=1kHz; 24bit Data; Measurement Bandwidth=20Hz  20kHz; unless otherwise specified)
Parameter
Min.
Typ.
Max.
Unit
MIC Amplifier: AIN pin; MDIF bit = “0” (Single-ended input)
Input Resistance (Note 8)
20
30
40
k
Gain
Gain Setting
0
-
+30
dB
Step Width
-
3
-
dB
MIC Power Supply: MPWR pin
Output Voltage
MICL bit = “0”
MICL bit = “1”
2.2
2.4
2.6
V
1.8
2.0
2.2
Output Noise Level (A-weighted)
-
-108
-
dBV
Load Resistance
2.0
-
-
k
Load Capacitance
-
-
30
pF
PSRR (f = 1kHz) (Note 9)
-
100
-
dB
ADC Analog Input Characteristics: AIN pins → ADC (Programmable Filter = OFF) → SDTO
Resolution
-
-
24
Bits
Input Voltage (Note 10)
(Note 11)
-
(Note 12)
1.86
0.261
2.07
-
Vpp
2.28
Vpp
S/(N+D) (-1dBFS)
(Note 11)
73
83
-
dBFS
(Note 12)
-
84
-
dBFS
D-Range
(Note 11)
78
88
-
dB
(60dBFS, A-weighted)
(Note 12)
-
95
-
dB
S/N (A-weighted)
(Note 11)
78
88
-
dB
(Note 12)
-
95
-
dB
PSRR (f = 1kHz) (Note 9)
-
90
-
dB
Note 8. Full Differential Input: IN+=20kΩ(typ), IN-=57kΩ(typ)@MGAIN3-0 bits = “0000” (0dB),
IN+=16kΩ(typ), IN-=244kΩ(typ)@MGAIN3-0 bits = “0110” (+18dB)
Note 9. PSRR applied to AVDD with 500mVpp sine wave.
Note 10. Single-ended Input: Vin = 0.9 x 2.3Vpp (typ) @MGAIN3-0 bits = “0000” (0dB)
Full Differential Input: Vin = (IN+) – (IN–) = 0.9 x 2.3Vpp (typ)
IN+ = 0.45 x 2.3Vpp (typ), IN– = 0.45 x 2.3Vpp (typ)
Note 11. MGAIN3-0 bits = “0110” (+18dB)
Full Differential Input: S/(N+D) = 81dB、DR = S/N = 86dB
Note 12. MGAIN3-0 bits = “0000” (0dB)
Full Differential Input: S/(N+D) = 83dB、DR = S/N = 93dB
015010680-E-00
- 11 -
2015/09