LHA6916/B
The LHA6916 is a 16-bit DAS (data acquisition system) supporting dual simultaneous sampling across 16 channels. Operated from a single 5 V analog supply, the LHA6916 processes true bipolar input signals of ±10 V, ±5 V and ±2.5 V. Each channel pair achieves a maximum throughput of 1 MSPS with 90.5 dB SNR at 1 MSPS sampling rate.
Input clamp protection tolerates up to ±25 V overvoltage. The analog input impedance remains at minimum 1 MΩ regardless of sampling frequency. The single-supply architecture integrates on-chip filters and high-impedance input buffers, eliminating the need for external driver op-amps and external bipolar power supplies.
The device fully integrates analog input clamp protection, dual 16-bit charge-redistribution SAR ADCs, a flexible digital filter, a 2.5 V voltage reference with reference buffer, as well as high-speed serial and parallel interfaces.
The LHA6916 serial peripheral interface is compatible with SPI, QSPI, DSP and MICROWIRE protocols.
Product Features
- 16-channel, dual simultaneous sampling analog inputs
- Independently programmable input range per channel
- True bipolar: ±10 V, ±5 V, ±2.5 V
- Single 5 V analog supply; VDDIO digital logic supply: 2.3 V to 3.6 V
- Fully integrated data acquisition solution
- Analog input clamp overvoltage protection
- Input buffers with minimum 1 MΩ analog input impedance
- 1st-order anti-aliasing analog filter
- On-chip precision voltage reference & reference buffer
- Dual-channel 16-bit successive approximation (SAR) ADC
- Throughput rate: 2 × 1 MSPS
- Oversampling function via digital filter
- Flexible sequencer, burst conversion mode supported
- Parallel / serial dual interface options
- SPI, QSPI, MICROWIRE, DSP compatible
- Optional cyclic redundancy check (CRC) error detection
- Hardware / software configurable
- Performance specifications
- Signal-to-Noise Ratio (SNR): 90.5 dB @ 1 MSPS
- Total Harmonic Distortion (THD): −103 dB
- INL: ±1 LSB typical, DNL: ±0.99 LSB maximum
- 7 kV ESD rating for analog input channels
- Integrated on-chip self-test function
- Package: 80-lead LQFP
Application Scenario
- Power line monitoring
- Protective relays
- Multi-phase motor control
- Instrumentation and control systems
- Data acquisition systems (DAS)
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