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TSC2117IRGZT датащи(PDF) 8 Page - Texas Instruments

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номер детали TSC2117IRGZT
подробное описание детали  Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI - Texas Instruments

TSC2117IRGZT датащи(HTML) 8 Page - Texas Instruments

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TSC2117
Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D
Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
SLAS550A – APRIL 2009 – REVISED JUNE 2009
www.ti.com
Electrical Characteristics (continued)
At 25
°C, AVDD, HVDD, IOVDD, TSVDD, = 3.3 V, SLVDD, SRVDD = 3.6V, DVDD = 1.8 V, VREF = 3.3 V, f
S (audio) =
48 kHz, CODEC_CLKIN = 256
× f
S, PLL = Off, SAR input is AUX1, VOL/MICDET pin disabled (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Touch-Screen SAR ADC
Resolution
Programmable: 8-bit, 10-bit, 12-bit
8
12
Bits
No missing codes
12-bit resolution
11
Bits
INL
Integral nonlinearity
12-bit resolution, conversion clock = 2 MHz
±7
LSB
Offset error
12-bit resolution, conversion clock = 2 MHz
±7
LSB
Gain error
12-bit resolution, conversion clock = 2 MHz
±7
LSB
12-bit resolution, conversion clock = 2 MHz,
Noise
0.8
LSB
AUX2 = 1 Vdc
Conversion Rate
Normal conversion operation
12 bits, internal conversion clock = 2 MHz
119
kHz
High-speed conversion
8 bits, internal conversion clock = 6 MHz (Conversion
250
kHz
operation
accuracy is reduced.)
Voltage Reference—VREF
Internal VREF
1.25
2.5
Voltage range
V
External VREF
1.25
AVDD
Measured with 1-
µF capacitor to analog ground.
Internal VREF output voltage
Internal VREF selected as 1.25 V (page 3/register 6,
1.23
V
bit D6 = 0)
INTERNAL OSCILLATOR—RC_CLK
Oscillator frequency for SAR
8.2
MHz
VOLUME CONTROL PIN (ADC); VOL/MICDET pin enabled
VOL/MICDET pin configured as volume control (page
0.5
×
Input voltage range
0/register 116, bit D7 = 1 and page 0/register 67, bit
0
V
AVDD
D7 = 0)
Input capacitance
2
pF
Volume control steps
128
Steps
AUDIO ADC
Microphone Input to ADC, 984-Hz Sine-Wave Input, fS = 48 kHz, AGC = OFF
MIC with R1 = 20 k
Ω (page 1/register 48 and register
Input signal level (0-dB)
0.707
VRMS
49, bits D7–D6)
fS = 48 kHz, 0-dB PGA gain, MIC input ac-shorted to
SNR
Signal-to-noise ratio
ground; measured as idle-channel noise,
80
90
dB
A-weighted(1) (2)
fS = 48 kHz, 0-dB PGA gain, MIC input 1 kHz at
Dynamic range
–60-dBFS input applied, referenced to 0.707-Vrms
91
dB
input, A-weighted (1) (2)
Total harmonic distortion +
fS = 48 kHz, 0-dB PGA gain, MIC input 1 kHz at –2
THD+N
–83
–70
dB
noise
dBFS input applied, referenced to 0.707 Vrms input
fS = 48 kHz, 0-dB PGA gain, MIC input 1 kHz at –2
THD
Total harmonic distortion
–90
dB
dBFS input applied, referenced to 0.707 Vrms input
Input capacitance
MIC input
2
pF
(1)
Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the inputs short-circuited, measured A-weighted over a
20-Hz to 20-kHz bandwidth using an audio analyzer.
(2)
All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values.
ELECTRICAL SPECIFICATIONS
8
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