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ADS8887 데이터시트 - Texas Instruments

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ADS8887 18-Bit, 100-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter TI
Texas Instruments TI
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DESCRIPTION
The ADS8887 is an 18-bit, 100-kSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).
The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices.
The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to +VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).
Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8887 excellent for lower-speed applications.

FEATURES
• Sample Rate: 100 kHz
• No Latency Output
• Unipolar, True-Differential Input Range:
   –VREF to +VREF
• Wide Common-Mode Voltage Range:
   0 V to VREF with 90-dB CMRR (min)
• SPI™-Compatible Serial Interface with
   Daisy-Chain Option
• Excellent AC and DC Performance:
   – SNR: 100 dB, THD: –115 dB
   – INL: ±1.5 LSB (typ), ±3.0 LSB (max)
   – DNL: +1.5 and –1 LSB (max), 18-Bit NMC
• Wide Operating Range:
   – AVDD: 2.7 V to 3.6 V
   – DVDD: 1.65 V to 3.6 V
      (Independent of AVDD)
   – REF: 2.5 V to 5 V (Independent of AVDD)
   – Operating Temperature: –40°C to +85°C
• Low-Power Dissipation:
   – 0.7 mW at 100 kSPS
   – 70 µW at 10 kSPS
• Power-Down Current (AVDD): 50 nA
• Full-Scale Step Settling to 18 Bits: 1200 ns
• Packages: MSOP-10 and SON-10

APPLICATIONS
• Automatic Test Equipment (ATE)
• Instrumentation and Process Controls
• Precision Medical Equipment
• Low-Power, Battery-Operated Instruments

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"ADS8887" 관련 부품명

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ADS7884 10-/8-BIT, 3-MSPS, MICRO-POWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTERS ADS7884 View Burr-Brown -> Texas Instruments

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