The AD4050 offers a unique balance of performance and power efficiency, plus innovative features for seamlessly switching between high-resolution and low-power modes tailored to the immediate needs of the system. The AD4050 is ideal for battery-powered, compact data acquisition and edge sensing applications.
The Easy Drive features enable highly efficient analog front end (AFE) designs. The small sampling capacitors (3.4 pF) maximize input impedance, thus reducing the dependence on high-bandwidth, power-hungry amplifiers typically required by SAR ADCs. The wide input common-mode range grants inherent support for both differential and single-ended signals.
The AD4050 supports microcontrollers with power-down modes and interrupt-driven firmware. The autonomous modes enable out-of-range event detection while the digital host sleeps. The averaging modes deliver on-demand, high-resolution measurements while offloading computations from the host processor. The self-timed device enable signal (DEV_EN) synchronizes AFE device power cycling to the ADC sampling instant, optimizing system power consumption while minimizing power-up settling error artifacts. The AD4050 also supports power cycling the voltage reference and using the supply as the ADC reference voltage (VREF) for additional power savings.
Device configuration and ADC data readback are supported via a robust, 4-wire serial peripheral interface (SPI) with cyclic redundancy check (CRC) supported for all data transfers. The AD4050 is available in compact LFCSP and WLCSP packages and operates across a wide temperature range, making it ideal for a diverse set of applications.
Key Features and Benefits
- Small footprint, big performance
- INL: ±0.5 LSB maximum
- SNR: 86.1 dB with VREF = 3.3 V
- 1.35 nJ per conversion
- 1.35 mW/0.68 mW at 1 MSPS/500 kSPS in sample mode
- 370 μW/112 μW at 1 MSPS/300 kSPS in autonomous modes
- 4.1 μW standby power
- Versatile signal conditioning integration
- Easy Drive features enable small, low-power AFE designs
- Compatible with differential and single-ended signal chains
- Wide common-mode input range
- Minimizes digital host activity and power dissipation
- Autonomous sampling with window comparator and interrupt generation
- Averaging filter with continuous and burst sampling options
- Power cycling synchronization for companion devices
- 4-wire SPI compatible with 1.8 V to 3.3 V logic
- 2.0 mm × 2.6 mm LFCSP and 1.7 mm × 2.0 mm WLCSP
- Wide operating temperature range: −40°C to +125°C
Applications
- Battery-powered data acquisition
- Vital signs monitoring
- Biological and chemical analysis
- Geologic and seismic sensing
- Motion and robotics
Evaluation Board
The AD4050 can be evaluated with the EVAL-AD4050-ARDZ.
Block Diagrams and Tables
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