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TSC2117IRGZT датащи(PDF) 8 Page - Texas Instruments |
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TSC2117IRGZT датащи(HTML) 8 Page - Texas Instruments |
8 / 192 page 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 Submit Documentation Feedback |
Аналогичный номер детали - TSC2117IRGZT |
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Аналогичное описание - TSC2117IRGZT |
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