TPA6166A2 Datasheet, PDF (7/49 Pages) Texas Instruments – 3.5-mm Jack Detect and Headset Interface IC

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TPA6166A2
SLAS997B – MARCH 2014 – REVISED JANUARY 2015
6.7 Electrical Characteristics, Mic Preamplifier and Bias
VDD = 1.8 V, MICVDD = 3.0 V, T_A = 25°C (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MICROPHONE BIAS
V_BIAS
Microphone bias voltage
Programmed for high value, MICVDD ≥ 2.8 V
Programmed for low value
I_OUT
Max bias output current
Internal bias resistor bypassed (MICR = 011)
MICR = 000
R_BIAS
Bias output resistance
MICR = 001
MICR = 010
MICR = 011
E_N
Bias output noise⁽¹⁾
PSRR Power supply rejection ratio
Between SLEEVE and RING2, BW = 100 Hz to 7 kHz,
2.2 kΩ load between SLEEVE and RING2, MICR = 000,
V_BIAS = 2.0 V
Measured between SLEEVE and
RING2, 2.2 kΩ load between
SLEEVE and RING2,
MICR = 000, V_BIAS = 2.6 V
f = dc,
MICVDD = 2.8 V to
3.6 V
f = 2 kHz, 100 mV_P-P
ripple,
MICVDD = 3.0 V
f = 2 kHz, 100 mV_P-P
ripple,
MICVDD = 2.8 V
MicZ
Microphone Capsule Impedance
Measured between Mic and GND
before insertion
MICROPHONE PREAMPLIFIER
A_V
Preamplifier gain
E_N
Input referred noise⁽¹⁾
THD+N Total harmonic distortion plus
noise
Programmed for high value, f = 997 Hz
Programmed for low value, f = 997 Hz
f = 100 Hz to 7 kHz, A_V = 24 dB, Mic on SLEEVE, 2.2 kΩ
load between SLEEVE and RING2, MICR = 000,
V_BIAS = 2.0 V
V_OUT = 1 V_RMS
Measured between MOUTP-MOUTN, 6.04 kΩ between
SLEEVE and RING2, MICR = 010, V_BIAS = 2.0 V, f = dc,
MICVDD = 2.4 V to 3.6 V
PSRR Power supply rejection ratio
Measured between MOUTP-
MOUTN, 2.2 kΩ between
SLEEVE and RING2,
MICR = 000, V_BIAS = 2.6 V
f = dc,
MICVDD = 2.8 V to
3.6 V
f = 2 kHz, 100 mV_P-P
ripple on MICVDD
V_CMO
f_C,LO
f_C,HI
Output Common Mode
Lower -3 dB frequency of HPF⁽²⁾
Upper -3 dB frequency of
amplifier ⁽²⁾
MICVDD = 2.4 V – 3.6V
(1) A-weighted
(2) Measured with respect to gain at 997 Hz
MIN TYP MAX UNIT
2.45 2.6 2.75
V
1.88 2.0 2.12
1.2
mA
2.09 2.2 2.31
2.47 2.6 2.73
kΩ
2.85 3.0 3.15
0.13
2.0
µV_RMS
92
73
dB
73
1500
20000 _Ω
23
24
11
12
3.4
25
dB
13
µV_RMS
0.095
%
74
109.5
dB
78
0.4×MICVDD
V
20
Hz
260
kHz
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