Datasheet

TSC2101
SLAS392D JUNE 2003 REVISED MAY 2005
www.ti.com
5
ELECTRICAL CHARACTERISTICS (continued)
At +25°C, AVDD1, AVDD2, DRVDD, IOVDD = 3.3 V, BVDD = 3.9 V, DVDD = 1.8 V, Int. V
ref
= 2.5 V, Fs (Audio) = 48 kHz, unless otherwise
noted (continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
MICROPHONE INPUT TO ADC
MICIN_HED 1020 Hz sine wave input,
Fs = 48 ksps
Full-scale input voltage (0 dB) 0.707 Vrms
Input common mode 1.5 V
SNR
Measured as idle channel noise, 0 dB gain,
A-weighted
80 90 dBA
THD 0.63 Vrms input, 0-dB gain 81 72 dB
217 Hz, 100 mV on AVDD1/2
(1)
55 dB
PSRR
1020 Hz, 100 mV on AVDD1/2
(1)
55 dB
Mute attenuation
Output code with 0.63 Vrms sine wave input at
1 kHz
0000H
Only ADC on 15 50 k
Input resistance
ADC and Sidetone on 8 16 k
Input capacitance 10 pF
HEADSET MICROPHONE BIAS
Register 1DH/Page 2, D7D8=00 3.3
Voltage range
Register 1DH/Page 2, D7D8=01 2.5
V
Register 1DH/Page 2, D7D8=1X 2
V
217 Hz, 100 mV on AVDD1/2 55
217 Hz, 100 mV on BVDD 74
dB
PSRR
1020 Hz, 100 mV on AVDD1/2 55
dB
1020 Hz, 100 mV on BVDD 74
Sourcing current Voltage drop <25 mV 5 mA
HANDSET MICROPHONE BIAS
Register 1DH/Page 2, D6=0 2.5
V
Voltage range
Register 1DH/Page 2, D6=1 2
V
217 Hz, 100 mV on AVDD1/2 55
dB
PSRR
1020 Hz, 100 mV on AVDD1/2 55
dB
Sourcing current Voltage drop <25 mV 5 mA
DAC INTERPOLATION FILTER
Pass band 20 0.45Fs Hz
Pass band ripple ±0.06 dB
Transition band 0.45Fs 0.5501Fs Hz
Stop band 0.5501Fs 7.455Fs Hz
Stop band attenuation 65 dB
Filter group delay 21/Fs Sec
De-emphasis error ±0.1 dB
(1)
ADC PSRR measurement is calculated as:
PSRR + 20 log
10
ǒ
VSIG
sup
V
ADCOUT
Ǔ
where VSIG
sup
is the ac signal applied on AVDD1/2, which is 100 mV
PP
at 1020 Hz, and
V
ADCOUT
+
Amplitude of Digital Output
Max Possible Digital Amplitude