Analog Devices Inc. ADA4940 全差分ADC驱动器
Analog Devices ADA4940全差分ADC驱动器是低噪声、低失真、超低功耗的差分放大器。非常适合于驱动分辨率最高为18位、DC至1 MHz的低功耗、高分辨率、高性能SAR型和Σ-Δ型模数转换器(ADC)，静态电流仅1.25 mA。
With the ADA4940-1/ADA4940-2, differential gain configurations are easily realized with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier. The ADA4940-1/ADA4940-2 are fabricated using Analog Devices Inc., complementary bipolar process, enabling them to achieve very low levels of distortion with an input voltage noise of only 3.9nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4940-1/ADA4940-2 make them well suited for a variety of data acquisition and signal processing applications.
Analog Devices offers the ADA4940-1AR-EBZ 8-Lead SOIC and ADA4940-1ACP-EBZ 8-Lead SOIC evaluation boards to help designers test the features of the ADA4940 Fully Differential ADC Drivers. These are bare boards with no components soldered to the them. The bare board enables designers to customize the circuit and quickly prototype a variety of differential amplifier circuits.
特性
- 260MHz Small signal bandwidth
- Extremely low harmonic distortion
- -122dB THD at 50kHz
- -96dB THD at 1MHz
- 3.9nV/√Hz Low input voltage noise
- 6.25mW (5V supply) Very low power consumption
- 0.35mV maximum offset voltage
- Externally adjustable gain
- Differential-to-differential or single-to-differential operation
- Balanced outputs
- 34ns Settling time to 0.1%
- Output voltage swing from -VS + 0.1V to +VS -0.1V
- Adjustable output common-mode voltage
- Flexible power supplies: 3V to 7V
应用
- Low power ADC drivers
- Single-ended-to-differential converters
- Differential buffers
- Line drivers
- Medical imaging
- Industrial process control
- Portable electronics
Functional Block Diagrams
