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高精度 ADC

ADS7871

最終購入段階

ADC、マルチプレクサ、PGA、内部リファレンス搭載、14 ビット、48KSPS DAS (データ アクイジション システム)

ご注文はこちら
データシート
ADS7871 は生産中止予定です
この製品は、生産中止予定です。新規設計では代替品をご検討ください。
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ADS7870 アクティブ 12 ビット ADC、マルチプレクサ、PGA、内部リファレンスのデータ収集システム Higher sample rate (52 kSPS), lower resolution (12-bit)

ADS7871

最終購入段階
データシート ご注文はこちら

製品詳細

Resolution (Bits) 14 Sample rate (max) (ksps) 48 Number of input channels 8 Interface type SPI Architecture SAR Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Oscillator, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 8.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
Resolution (Bits) 14 Sample rate (max) (ksps) 48 Number of input channels 8 Interface type SPI Architecture SAR Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 5.5 Input voltage range (min) (V) 0 Features Oscillator, PGA Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 8.5 Analog supply voltage (min) (V) 2.7 Analog supply voltage (max) (V) 5.5 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.5
SSOP (DB) 28 79.56 mm² (10.2 mm × 7.8 mm)
  • PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
  • Programmable Input (Up to 4-Channel Differential/Up to 8-Channel Single-Ended or Some Combination)
  • 1.15-V, 2.048-V, or 2.5-V Internal Reference
  • SPI/DSP Compatible Serial Interface ( 20 MHz)
  • Throughput Rate: 48 kSamples/sec
  • Error Overload Indicator
  • Programmable Output 2s Complement/Binary
  • 2.7-V to 5.5-V Single Supply Operation
  • 4-Bit Digital I/O Via Serial Interface
  • Pin Compatible With ADS7870
  • SSOP-28 Package
  • APPLICATIONS
    • Portable Battery-Powered Systems
    • Low-Power Instrumentation
    • Low-Power Control Systems
    • Smart Sensor Applications

All trademarks are the property of their respective owners.
  • PGA Gains: 1, 2, 4, 5, 8, 10, 16, 20 V/V
  • Programmable Input (Up to 4-Channel Differential/Up to 8-Channel Single-Ended or Some Combination)
  • 1.15-V, 2.048-V, or 2.5-V Internal Reference
  • SPI/DSP Compatible Serial Interface ( 20 MHz)
  • Throughput Rate: 48 kSamples/sec
  • Error Overload Indicator
  • Programmable Output 2s Complement/Binary
  • 2.7-V to 5.5-V Single Supply Operation
  • 4-Bit Digital I/O Via Serial Interface
  • Pin Compatible With ADS7870
  • SSOP-28 Package
  • APPLICATIONS
    • Portable Battery-Powered Systems
    • Low-Power Instrumentation
    • Low-Power Control Systems
    • Smart Sensor Applications

All trademarks are the property of their respective owners.

The ADS7871 (US patents 6140872, 6060874) is a complete low power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 14-bit successive approximation analog-to-digital (A/D) converter and a precision voltage reference.

The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.

For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.

The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.

The ADS7871 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7871s share a common reference.

The serial interface allows the use of SPI™, QSPI™, Microwire™, and 8051-family protocols, without glue logic.

The ADS7871 (US patents 6140872, 6060874) is a complete low power data acquisition system on a single chip. It consists of a 4-channel differential/8-channel single-ended multiplexer, precision programmable gain amplifier, 14-bit successive approximation analog-to-digital (A/D) converter and a precision voltage reference.

The programmable-gain amplifier provides high input impedance, excellent gain accuracy, good common-mode rejection, and low noise.

For many low-level signals, no external amplification or impedance buffering is needed between the signal source and the A/D input.

The offset voltage of the PGA is auto zeroed. Gains of 1, 2, 4, 5, 8, 10, 16, and 20 V/V allow signals as low as 125 mV to produce full-scale digital outputs.

The ADS7871 contains an internal reference, which is trimmed for high initial accuracy and stability vs temperature. Drift is typically 10 ppm/°C. An external reference can be used in situations where multiple ADS7871s share a common reference.

The serial interface allows the use of SPI™, QSPI™, Microwire™, and 8051-family protocols, without glue logic.
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上位の文書 タイプ タイトル フォーマットオプション 最新の英語版をダウンロード 日付
* データシート ADS7871: 14-Bit A/D Converter, MUX, PGA & Internal Reference DAQ System データシート (Rev. C) 2004/10/04

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