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DAC1282IPW データシート(PDF) 1 Page - Texas Instruments |
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DAC1282IPW データシート(HTML) 1 Page - Texas Instruments |
1 / 46 page Digital Signal Generator Serial Interface VREF DVDD AVDD DGND AVSS CLK SW/TD SYNC CS DIN DOUT SCLK PWDN RESET/ DAC1282 Voltage Output DAC VOUTN VOUTP Switch In Optional Bitstream Input Switch Out Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DAC1282, DAC1282A SBAS490B – DECEMBER 2011 – REVISED MAY 2015 DAC1282 Low Distortion Digital-to-Analog Converter for Seismic 1 Features 3 Description The DAC1282 is a fully-integrated digital-to-analog 1 • Single-Chip Test Signal Generator converter (DAC) providing low distortion, digital • Buffered Voltage Output synthesized voltage output suitable for testing of • High Performance: seismic equipment. The DAC1282 achieves very high performance in a small package with low power. – THD: –125 dB (G = 1/1 to 1/8) Together, with the high-performance ADS1281 and – SNR: 120 dB (413 Hz BW, G = 1/1) ADS1282 analog-to-digital converters (ADCs), these • Analog and Digital Gain Control devices create a measurement system that meets the exacting demands of seismic data acquisition • Output Frequency: 0.488 Hz to 250 Hz equipment. • Sine, Pulse, and DC Modes The DAC1282 integrates a digital signal generator, a • Digital Data Input Mode DAC, and an output amplifier providing sine wave, dc, • Low On-Resistance Signal Switch and pulse output voltages. • Sync Input The output frequency is programmable from 0.5 Hz to • Power-Down Mode 250 Hz and the magnitude is scaled by both analog • Analog Supply: 5 V or ±2.5 V and digital control. The analog gain is adjustable in 6- dB steps and the digital gain in 0.5-dB steps. The • Digital Supply: 1.8 V to 3.3 V analog gain settings match those of the ADS1282 for • Power: 38 mW testing at all gains with high resolution. • Package: TSSOP-24 The DAC1282 also provides pulse outputs. The pulse • Operating Range: –50°C to +125°C amplitude is user-programmed and then selected by the pin for precise timing. Custom output signals can 2 Applications be generated by applying an external bitstream • Energy Exploration pattern. • Seismic Monitoring Systems A signal switch can be used to connect the DAC output to sensors for THD and impulse testing. The • High-Accuracy Instrumentation switch timing is controlled by pin and by command. A SYNC pin synchronizes the DAC output to the analog-to-digital converter (ADC) sample interval. A power-down input disables the device, reducing power consumption to microwatts. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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