LHA5652-8
Fast settling, highly accurate, low power, 8-/16-channel, multiplexed ADC for low bandwidth input signals with integrated input buffers.
Integrated precision, 2.5 V, low drift (2 ppm/℃), band gap reference and integrated oscillator.
Eight flexible setups with configurability for output data rate, digital filter mode, offset/gain error correction, reference selection, buffer enables and more. This per channel configurability extends to the output data rate used for each channel when using sinc5 + sinc1 filter.
Sinc5 + sinc1 filter maximizes channel scan rate, and sinc3 filter maximizes resolution and enhanced 50 Hz/60 Hz rejection, with four selectable options to maximize rejection.
Integrated diagnostic features, including CRC, register checksum, temperature sensor, crosspoint multiplexer, burnout currents, and GPIOs/GPOs.
Product Features
- Low power, 8-/16-channel, highly integrated multiplexed analog-to-digital converter (ADC)
- Integration
- Precision analog input buffers and reference input buffers
- 2.5 V precision reference (2.0 ppm/℃)
- Cross point multiplexer (enable system diagnostic)
- 8 full differential or 16 single-ended channels
- Clock oscillator
- GPIO and GPO pins with automatic external mux control
- Fast and flexible output rate: 1.25 SPS to 31.25 kSPS
- Channel scan data rate: 6.21 kSPS/channel (161 μs settling)
- Performance specifications
- 16.67 noise free bits at 31.25 kSPS
- 24 noise free bits at 1.25 SPS
- INL: ±1 ppm/FSR
- 85 dB rejection of 50 Hz and 60 Hz with 50 ms settling
- Operates with either 3.3 V or 5 V single supply
- Single supply AVDD1 = 3.3 V or 5 V, AVDD2 = 2 V to 5 V, IOVDD = 2 V to 5 V
- Optional split supply AVDD1 and AVSS = ±2.5 V or AVDD1 and AVSS = ±1.65 V
- Current: 1.4 mA
- 3-/4-wire serial digital interface (Schmitt trigger on SCLK)
- CRC error checking
- SPI, QSPI, MICROWIRE, and DSP compatible
- Package: 40-lead 6 mm × 6 mm LFCSP
- Temperature range: −40 ℃ to +105 ℃
Application Scenario
- Process control: PLC/DCS modules
- Voltage, current, temperature, and pressure measurement
- Flow meters
- Medical and scientific multichannel instrumentation
- Seismic instrumentation
- Chemical analysis instrumentation: chromatography
Room G2-1201,Artificial Intelligence Industrial Park, No. 88 JinjihuAvenue, Suzhou Industrial Park
Room 903,Hantang Building, No.1 Xinglong Street, OCT, NanshanDistrict,Shenzhen
Room 1306,Zhongkun Building, No. 59, Gaoliangqiao Xie StreetBeixiaguan Street, Haidian District, Beijing
Recruitment mailbox：hryang.wang@legendsemi.com
Sales mailbox：sales@legendsemi.com
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