AK5700 Datasheet, PDF (6/61 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Mono ADC with PLL & MIC-AMP

ASAHI KASEI
[AK5700]
ANALOG CHARACTERISTICS
(Ta=25°C; AVDD, DVDD=3.0V; AVSS=DVSS=0V; PLL Master Mode; MCKI=12MHz, fs=44.0995kHz, BCLK=64fs;
Signal Frequency=1kHz; 16bit Data; Measurement frequency=20Hz ∼ 20kHz; unless otherwise specified)
Parameter
Min
Typ
max
Units
MIC Amplifier: AIN1, AIN2 pins; MDIF1 bit = “0” (Single-ended inputs)
Input
MGAIN1-0 bits = “00”
40
60
80
kΩ
Resistance _{MGAIN1-0 bits = “01” or “10”}
20
30
40
kΩ
MGAIN1-0 bits = “00”
-
0
-
dB
Gain
MGAIN1-0 bits = “01”
-
+15
-
dB
MGAIN1-0 bits = “10”
-
+30
-
dB
MIC Amplifier: AIN+, AIN− pins; MDIF1 bit = “1” (Full-differential input)
Input Voltage (Note 7)
MGAIN1-0 bits = “01”
-
-
0.37
Vpp
MGAIN1-0 bits = “10”
-
-
0.066
Vpp
MIC Power Supply: MPWR pin
Output Voltage (Note 8)
2.02
2.25
2.48
V
Load Resistance
1.0
-
-
kΩ
Load Capacitance
-
-
30
pF
ADC Analog Input Characteristics: AIN1/AIN2 pins (Single-ended inputs) → ADC → IVOL,
MGAIN=+15dB, IVOL=0dB, ALC=OFF
Resolution
-
-
16
Bits
MGAIN=+30dB
-
0.057
-
Vpp
Input Voltage (Note 9)
MGAIN=+15dB
0.27
0.32
0.37
Vpp
MGAIN=0dB
1.53
1.80
2.07
Vpp
S/(N+D) (−0.5dBFS) (Note 10)
67
77
-
dB
D-Range (−60dBFS, A-weighted) (Note 11)
79
87
-
dB
S/N (A-weighted) (Note 11)
79
87
-
dB
Power Supplies:
Power Supply Current: AVDD+DVDD
Power Up (PDN pin = “H”) (Note 12)
-
6
12
mA
Power Down (PDN pin = “L”) (Note 13)
-
1
20
μA
Note 7. The voltage difference between AIN+ and AIN− pins. AC coupling capacitor should be inserted in series at each
input pin. Full-differential input is not available at MGAIN1-0 bits = “00”. Maximum input voltage of AIN+,
AIN− pins is proportional to AVDD voltage, respectively.
Vin = |(AIN+) − (AIN−)| = 0.123 x AVDD (max)@MGAIN1-0 bits = “01”, 0.022 x AVDD (max)@MGAIN1-0
bits = “10”.
When the signal larger than above value is input to AIN+, AIN− pin, ADC does not operate normally.
Note 8. Output voltage is proportional to AVDD voltage. Vout = 0.75 x AVDD (typ).
Note 9. Input voltage is proportional to AVDD voltage. Vin = 0.107 x AVDD (typ)@MGAIN1-0 bits = “01” (+15dB),
Vin = 0.6 x AVDD(typ)@MGAIN1-0 bits = “00” (0dB).
Note 10. 80dB(typ)@MGAIN=0dB, 70dB(typ)@MGAIN=+30dB
Note 11. 89dB(typ)@MGAIN=0dB, 75dB(typ)@MGAIN=+30dB
Note 12. PLL Master Mode (MCKI=12MHz), PMADC = PMVCM = PMPLL = PMMP = M/S bits = “1” and MCKO bit
= “0”. MPWR pin outputs 0mA. AVDD=4.5mA(typ), DVDD=1.5mA(typ).
EXT Slave Mode (PMPLL = M/S = MCKO bits = “0”): AVDD=3.8mA(typ), DVDD=1.2mA(typ).
Bypass Mode (THR bit = “1”, PMADC = M/S bits = “0”), fs=8kHz: AVDD=1μA(typ), DVDD=150μA(typ).
Note 13. All digital input pins are fixed to DVDD or DVSS.
MS0569-E-01
-6-
2006/12