TPA6139A2 Datasheet, PDF (6/22 Pages) Texas Instruments – DirectPath™ 25-mW Headphone Amplifier With Programmable-Fixed Gain

TPA6139A2
SLOS700B – JANUARY 2011 – REVISED JUNE 2012
www.ti.com
PROGRAMMABLE GAIN SETTINGS
V_DD = 3.3 V, R_load = 32 kΩ, T_A = 25°C, Charge pump:= C_CP 1 µF, C_IN = 1.0 µF, 1 x gain select (unless otherwise noted)⁽¹⁾
PARAMETER
TEST CONDITIONS
TPA6139A2
UNIT
MIN TYP MAX
R_Tol Gain programming resistor tolerance
2%
ΔA_V
Gain matching
Gain step tolerance
Between left and right channels
0.25
dB
0.10
dB
Gain steps
Gain resistor 2% tolerance
249k or higher
82k0
49k2
35k1
27k3
20k5
15k4
11k5
9k09
7k50
6k19
5k11
3k90
–2.0
–1.0
–1.5
–2.3
–2.5
–3.0
–3.5
V/V
–4.0
–5.0
–5.6
–6.4
–8.3
–10.0
Input impedance
Gain resistor 2% tolerance
249k or higher
82k0
49k2
35k1
27k3
20k5
15k4
11k5
9k09
7k50
6k19
5k11
3k90
37
55
44
33
31
28
24
kΩ
22
18
17
15
12
10.0
(1) If pin 12, GAIN, is left floating an internal pull-up sets the gain to –2.0x
Gain setting is latched during power-up
6
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