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ADS-947MC Arkusz danych(PDF) 1 Page - Murata Power Solutions Inc. |
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ADS-947MC Arkusz danych(HTML) 1 Page - Murata Power Solutions Inc. |
1 / 8 page Figure 1. ADS-947 Functional Block Diagram FEATURES • 14-bit resolution • 10MHz minimum sampling rate • No missing codes • Ideal for both time and frequency-domain applications • Excellent THD (–81dB) and SNR (76dB) • Edge-triggered • Small, 24-pin, ceramic DDIP or SMT • Requires only +5V and –5.2V supplies • Low-power, 2 Watts GENERAL DESCRIPTION The ADS-947 is a 14-bit, 10MHz sampling A/D converter. This device accurately samples full-scale input signals up to Nyquist frequencies with no missing codes. Excellent differential nonlinearity error (DNL), signal-to-noise ratio (SNR), and total harmonic distortion (THD) make the ADS- 947 the ideal choice for both time-domain (CCD/FPA imaging, scanners, process control) and frequency-domain (radar, telecommunications, spectrum analysis) applications. The functionally complete ADS-947 contains a fast-settling sample/hold amplifier, a subranging (two-pass) A/D converter, an internal reference, timing/control logic, and error-correction circuitry. Digital input and output levels are TTL. The ADS-947 only requires the rising edge of a start convert pulse to operate. Requiring only +5V and –5.2V supplies, the ADS-947 typically dissipates just 2 Watts. The device is offered with a bipolar input range of ±2V. Models are available for use in either commercial (0 to +70°C) or extended (–40 to +100°C) ®® operating temperature ranges. A proprietary, auto-calibrating, error-correcting circuit allows the device to achieve specified performance over the extended temperature range. INPUT/OUTPUT CONNECTIONS PRELIMINARY PRODUCT DATA REF DAC 16 BIT 14 (LSB) 15 BIT 13 12 BIT 12 11 BIT 11 10 BIT 10 9 BIT 9 8 BIT 8 7 BIT 7 6 BIT 6 5 BIT 5 4 BIT 4 3 BIT 3 2 BIT 2 1 BIT 1 (MSB) TIMING AND CONTROL LOGIC OFFSET ADJUST 23 ANALOG INPUT 21 START CONVERT 18 DATA VALID 17 +5V ANALOG SUPPLY 22 +5V DIGITAL SUPPLY 13 –5.2V SUPPLY 20 ANALOG GROUND 19, 24 DIGITAL GROUND 14 – + S/H BUFFER FLASH ADC 1 FLASH ADC 2 POWER AND GROUNDING S AMP PIN FUNCTION PIN FUNCTION 1 BIT 1 (MSB) 24 ANALOG GROUND 2 BIT 2 23 OFFSET ADJUST 3 BIT 3 22 +5V ANALOG SUPPLY 4 BIT 4 21 ANALOG INPUT 5 BIT 5 20 –5.2V SUPPLY 6 BIT 6 19 ANALOG GROUND 7 BIT 7 18 START CONVERT 8 BIT 8 17 DATA VALID 9 BIT 9 16 BIT 14 (LSB) 10 BIT 10 15 BIT 13 11 BIT 11 14 DIGITAL GROUND 12 BIT 12 13 +5V DIGITAL SUPPLY ADS-947 14-Bit, 10MHz Sampling A/D Converters DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508) 339-3000, (800) 233-2765 Fax: (508) 339-6356 • Email: sales@datel.com • Internet: www.datel.com |
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