Analog Devices Inc. ADA4945-1 High Speed Fully Differential ADC Driver
Analog Devices Inc. ADA4945-1 High Speed, Fully Differential Analog to Digital Converter (ADC) Driver has low noise, low distortion, and a fully differential amplifier with two selectable power modes. The ADA4945-1 operates over a broad power supply range of 3V to 10V. The driver features low DC offset, DC offset drift, and excellent dynamic performance. This makes the ADA4945-1 well suited for various data acquisition and signal processing applications. This device is ideal for driving high-resolution, high-performance successive approximation registers (SAR). The ADA4945-1 ADC Driver is also suitable for Σ-Δ analog-to-digital converters (ADCs) on a 4mA of quiescent current (full power mode).
Features
- Broad power supply range: 3V to 10V
- Wide input common-mode voltage range: -VS to +VS - 1.3V
- Rail-to-rail output
- Fully specified dual power mode operation
- 4mA full power mode (145MHz)
- 1.4mA low power mode (80MHz)
- Full power mode
- ±115µV maximum offset voltage from -40°C to +125°C
- Low harmonic distortion
- 133dBc HD2 and -140dBc HD3 at 1kHz
- 133dBc HD2 and -116dBc HD3 at 100kHz
- Fast settling time
- 18-bit: 100ns
- 16-bit: 50ns
- Input voltage noise: 1.8nV/√Hz, f = 100kHz
- Adjustable output clamps for ADC input protection
Applications
- Low power Σ-Δ, PulSAR®, and SAR ADC drivers
- Single-ended to differential converters
- Differential buffers
- Medical imaging
- Process control
- Portable electronics
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Block Diagram
Published: 2019-04-29
| Updated: 2023-02-17