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ADS7871

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DAS de 14 bits, 48 KSPS con ADC, MUX, PGA y referencia interna

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Hoja de datos
ADS7871 está en proceso de ser discontinuado
Este producto está en proceso de ser suspendido. Los nuevos diseños deben considerar un producto alternativo.
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Pin por pin con la misma funcionalidad que el dispositivo comparado
ADS7870 ACTIVO ADC de 12 bits, MUX, PGA y sistema de adquisición de datos de referencia interna Higher sample rate (52 kSPS), lower resolution (12-bit)

ADS7871

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Detalles del producto

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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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos ADS7871: 14-Bit A/D Converter, MUX, PGA & Internal Reference DAQ System datasheet (Rev. C) 4/10/2004

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