INA350数据手册TI中文资料规格书

描述 Description

INA350 is a selectable gain instrumentation amplifier that offers four gain options across INA350ABS and INA350CDS variants, which are available in smaller packages. INA350ABS has gain options of 10 or 20 and INA350CDS has gain options of 30 or 50. These gain options can be selected by toggling the gain select (GS) pin. This INA is ideal for bridge-type sensing and for differential to single-ended conversion applications.

Built with precision matched integrated resistors, INA350 saves on BOM costs, pick-and-place machine handling costs, and board space by removing the need for precise or closely-matched external resistors. The device can be directly interfaced to low speed, 10-bit to 14-bit analog-to-digital converters (ADC) and is ideal for replacing discrete implementation of instrumentation amplifiers built using commodity amplifiers and discrete resistors.

Designed with the three-amplifier architecture, INA350 is optimized for delivering performance. It achieves 85dB of minimum CMRR and 0.5% of maximum gain error along with 1mV of maximum offset across all gain options while consuming just 130 µA of maximum quiescent current. It has an integrated shutdown option to turn off the amplifier when idle for additional power savings in battery powered applications.

特性 Features

• Ideal for size, cost, and power conscious designs
• Selectable gain options of 10, 20, 30, and 50
• Space saving ultra-small package options
• 10-pin X2QFN (RUG) – 3 mm2
• 8-pin WSON (DSG) – 4 mm2
• 8-pin SOT23-THN (DDF) – 4.64 mm2

• Optimized performance for 10-bit to 14-bit systems
• CMRR: 85 dB (minimum) across all gains
• Gain error:
• 0.25% (maximum) for G = 10, 20
• 0.50% (maximum) for G = 30, 50

• Low offset voltage: 0.2 mV (typical), 1 mV (maximum)

• Bandwidth: 100 kHz (G = 10), 25 kHz (G = 50)
• Drives 100 pF with 45° of phase margin
• Shutdown option for power conscious applications
• Supply range: 1.7 V (±0.85 V) to 5.5 V (±2.75 V)
• Specified temperature range: –40°C to 125°C