Rainbow Electronics MAX98088 - Manual (Page 18)

Stereo Audio Codec
with FLEXSOUND Technology
MAX98088
18
ELECTRICAL CHARACTERISTICS (continued)
(V AVDD = V PVDD = V DVDD = V DVDDS1 = V DVDDS2 = +1.8V, V SPKLVDD = V SPKRVDD = 3.7V. Speaker loads (Z SPK ) connected
between SPK_P and SPK_N. Receiver load (R REC ) connected between RECP and RECN. Headphone loads (R HP ) connected from
HPL or HPR to HPGND. Line out loads (R LOAD ) connected from LOUTL and LOUTR to ground. R LOAD = R HP = J, R REC = J, Z SPK
= J, C REF = 2.2FF, C MICBIAS = C REG = 1FF, C C1N-C1P = 1FF, C HPVDD = C HPVSS = 1FF. AV MICPRE_ = +20dB, AV MICPGA_ = 0dB,
AV DACATTN = 0dB, AV DACGAIN = 0dB, AV ADCLVL = 0dB, AV ADCGAIN = 0dB, AV PGAIN_ = 0dB, AV HP_ = 0dB, AV REC = 0dB, AV SPK_
= 0dB, MCLK = 12.288MHz, LRCLK = 48kHz, MAS = 1. T
A
= +25NC, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
HEADPHONE AMPLIFIER
Output Power P OUT f = 1kHz, THD = 1%
R L = 32I 30
mW
R L = 16I 38
Positive Charge-Pump
Output Voltage
HPVDD
V OUT = 0.2V, R L = J PVDD/2
V
V OUT = 0.5V, R L = J PVDD
Negative Charge-Pump
Output Voltage
HPVSS
V OUT = 0.2V, R L = J -PVDD/2
V
V OUT = 0.5V, R L = J -PVDD
Output Voltage Threshold
(Output Voltage at which
the Charge Pump Switches
Modes; VOUT Rising;
Transition from Split to
Invert Mode)
VTH2 RL = J
Q PVIN
x 0.25
V
Full-Scale Output (Note 7) 1 V RMS
Volume Control AV HP_ (Note 5)
HPVOL_ = 0x00 -67
dB
HPVOL_ = 0x1F +3
Volume Control Step Size
+3dB to +1dB 0.5
dB
+1dB to -5dB 1
-5dB to -19dB 2
-19dB to -43dB 3
-43dB to -67dB 4
Mute Attenuation f = 1kHz 100 dB
Output Offset Voltage V OS AV HP_ = -67dB
T A = +25NC Q 0.5 Q 1
mV
T A = T MIN to T MAX Q 3
Capacitive Drive Capability No sustained oscillations
R HP = 32I 500
pF
R HP = J 100
SPEAKER BYPASS SWITCH
On-Resistance R
ON
I SPKL_ = 100mA, SPKBYP = 1,
V RXIN_ = [0V, V SPKLVDD ]
2.8
I
Total Harmonic Distortion
+ Noise
THD+N
V IN = 2V P-P , V CM = V SPKLVDD /2,
Z SPK = 8I + 68FH, f = 1kHz,
SPKBYP = 1
R S = 10I 60
dB
R S = 0I 60
Off-Isolation
V IN = 2V P-P , V CM = V SPKLVDD /2, Z L = 8I + 68FH,
f = 1kHz
96 dB
Off-Leakage Current
V RXIN_ = [0V, V SPKLVDD ],
V SPKL_ = [V SPKLVDD , 0V]
-20 +20
F
A