ADS7871 概述

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 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.

ADS7871 特性

• 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

ADS7871 应用

• Portable Battery-Powered Systems
• Low-Power Instrumentation
• Low-Power Control Systems
• Smart Sensor Applications