Using system-in-package (SIP) technology, the ADAQ4381-4 reduces end system component count by combining multiple common signal processing and conditioning blocks into a single device. These blocks include a quad-channel, high resolution 14-bit, 4 MSPS simultaneous sampling SAR ADC, low noise, fully differential ADC driver amplifier, a 3.3 V precision voltage reference, low-noise buffer amplifiers, and low-dropout linear regulator.
The ADAQ4381-4 has an on-chip oversampling blocks to improve the dynamic range and reduce noise at lower bandwidths. The oversampling can boost up to two bits of added resolution. It provides the flexibility of a configurable ADC driver feedback loop to allow four gain and attenuation adjustments, and accept both fully differential or single-ended to differential input configuration.
Using Analog Devices, Inc. iPassives® technology, the ADAQ4381-4 incorporates critical passive components with superior matching and drift characteristics to minimize temperature dependent error sources and to offer optimized signal chain performance. Housed in a small 8 mm × 8 mm × 0.8 mm pitch, 81- ball CSP_BGA package, the ADAQ4381-4 enables compact design without sacrificing performance and simplifies end system bill of materials management. The ADAQ4381-4's optimum performance is guaranteed with a single 5 V supply operation, all the required bypass and decoupling capacitors are included inside the package. The level of ADAQ4381-4 system integration solves many design challenges, which enables a compact and simple solution for a multichannel application.
The conversion result can clock out simultaneously through 4-wire mode for faster throughput or through 1-wire serial mode when slower throughput is allowed. The ADAQ4381-4 is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using the separate logic supply. The ADAQ4381-4 is specified to operate over a temperature range of −40°C to +105°C.
Key Features and Benefits
- Easy to use μModule® data acquisition system
- 11× footprint reduction vs. discrete solution
- Integrated critical passive components
- 5 V single supply operation
- Guaranteed 14-bit no missing codes
- On-chip oversampling function
- 2-bit resolution boost
- Out of range Indicator (ALERT)
- INL: ±0.3 LSB typical, ±1 LSB maximum
- SNR (typical)
- 85 dB at Gain = 1.0, fIN= 1 kHz
- 92.4 dB with OSR = ×8 at Gain = 1.0, fIN= 1 kHz
- Channel-to-Channel phase matching: 0.005° typical at fIN= 20kHz
- Integrated high precision reference, 3 ppm/°C typical drift
- Gain error: 0.003% typical
- Gain drift: 0.8 ppm/°C typical
- Integrated internal buffer with VCM generation
- Integrated fully differential ADC driver with signal scaling
- Wide input common-mode voltage range
- High common-mode rejection
- Single-ended to differential conversion
- Pin selectable input range with overrange
- Input range: ±2 V, ±3.3 V, ±5.5 V, ±11 V
- Gain/Attenuation: G = 0.3, 0.6, 1.0, and 1.6
- High-speed serial interface
- 8 mm x 8 mm, 0.8 mm pitch, 81-ball CSP_BGA package
Applications
- Lab grade battery test system
- Motor control current sense
- Motor control position feedback
- Sonar
- Power quality monitoring
- Data acquisition system
- Erbium-Doped Fiber Amplifier (EDFA) applications
- I and Q demodulation
Evaluation Board
The ADAQ4381-4 can be evaluated with the EVAL-ADAQ4381-4.
Block Diagrams and Tables
See related product
