legendsemi

New Release | LHA9954: 32-bit ultra-high precision analog-to-digital converter (ADC)


New product introduction


LHA9954


Product description

The LHA9954 is a high-performance, single-chip analog-to-digital converter (ADC) that includes a low-noise programmable gain amplifier (PGA), delta-sigma modulator, and dedicated digital filter. The high-performance mode can increase the resolution of the ADC by increasing power consumption. If lower power consumption is required, low chip power consumption can be obtained by moderately reducing the resolution, so as to achieve a balance between power consumption and resolution. Two-channel multiplexer can be used to select the signal input from outside and the signal inside the chip. There is a mode to test the internal noise by shorting the input circuit.
The PGA features high input impedance and low noise, allowing direct connection to geophone or hydrophone sensors.
A fourth-order intrinsically stable modulator provides excellent low-noise and linearity performance,
Proprietary design eliminates Idle Tone.
The modulator output is filtered and decimated by an on-chip digital filter to generate an ADC conversion result. Digital filters provide data rates from 250 to 4000 SPS. The high-pass filter (HPF) has a programmable corner frequency. On-chip gain and offset adjustment registers support system calibration. The sync input controls the timing of ADC conversions. A shutdown input puts the ADC in shutdown mode.
The LHA9954 is housed in a compact 24-lead 5mm x 4mm QFN package and is fully rated for operation from –40°C to +85°C with a maximum operating temperature range of –50°C to +125°C.


Product performance

● Low power mode
- 7mW (PGA = 1, 2, 4 and 8)
- 127dB SNR (250 SPS, PGA=1)

● High resolution mode:
- 12mW (PGA=1, 2, 4 and 8)
- 135.4dB SNR (250 SPS, PGA=1)

● THD: –120dB

● CMRR: 127dB

● Two-channel multiplexer

● Flexible digital filter:
- Sinc Filtering + Finite Impulse Response (FIR) + Infinite Impulse Response

● (IIR) (optional)
- Linear or minimum phase options
- Programmable high-pass filter

● Offset and gain error calibration

● Operating temperature range from –50°C to +125°C

● Analog power supply: 5V or ±2.5V

● Digital power supply: 1.8V to 3.3V

● 24 pin-5mm x 4mm QFN package


Case introduction

The main application areas are oil exploration, bridge measurement and high-precision instrumentation, which fills the domestic blank of such technology.

 

Contact us/Request a sample

sales@legendsemi.com

North/East China
Tel.: 15062630141

Southern China
Tel.: 13606907992

Address: Room 1306, Zhongkun Building, Haidian District, Beijing

Hot news


[New Product Release of Legendsemi] LH32M3Sxx:first 32-bit ARMCortex-M3 processor integrated with 2Msps 16-bit SARADC in China

The LH32M3Sxx series of MCUs are fully integrated single-package devices integrating high-performance analog and digital peripherals and a 72 MHz ARM Cortex-M3 processor.


[New Product Release of Legendsemi] LHA7732: 32-bit high resolution analog-to-digital converter

The LHA7732 is a high performance, monolithic analog-to-digital converter (ADC). The ADC supports two modes of operation to achieve a balance between power consumption and resolution.


[New Product Release of Legendsemi] LHA8961: 16-bit SARADC

The LHA8961 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single supply (VDD). It includes a low-power, high-speed, 16-bit sampling ADC and a multi-function serial interface port.


[New Product Pre-Release] LHR30xx: low noise, very low temperature drift, high precision voltage reference

The LHR30xx is a family of low noise, low drift, very high precision voltage references. These references support both sinking and sourcing current and have excellent source and load regulation.