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Legendsemi LHE7908GSELBN
| Manufacturer | LegendsemiAsian Brands |
| MPN | LHE7908GSELBN |
| LCSC Part # | C42459101 |
| Packaging | LQFP-64(10x10) |
| Customer # | |
| Key Attributes | Multi-channel simultaneous sampling 24-bit Σ-Δ analog-to-digital converter |
| Datasheet |  Legendsemi LHE7908GSELBN |
Products Specifications
Show similar products (0) >| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Data Acquisition/Analog to Digital Converters (ADC) | |
| Manufacturer | Legendsemi | |
| Packaging | LQFP-64(10x10) | |
| Operating Temperature | -40℃~+85℃ | |
| Interface | SPI | |
| Quiescent Current (Iq) | - | |
| Voltage - Supply | 2.7V~5.25V;1.65V~5.25V | |
| Number of Channels | 8 | |
| Integral non - linearity | - | |
| Clock/Oscillator | Built-in | |
| Clock Frequency | 2.048MHz | |
| Features | Bipolar power supply;Multiplexers;Simultaneous sampling;Integrated modulator;Built-in digital filter;Built-in temperature sensor | |
| Voltage Reference | Built-in | |
| Resolution(Bits) | 24;64kHz | |
| S/N Ratio | 122dB | |
| ADC architecture | Sigma-Delta | |
| Programmable Gain | Support |
Additional Information
| Type | Details |
|---|---|
| Minimum | 1 |
| Multiple | 1 |
| Standard Packaging | 160 |
| Sales Unit | Piece |
| EDA Models | EasyEDA Model |
Introduction
LHE7904, LHE7906, and LHE7908 (LHE790X) are a family of multichannel, simultaneous-sampling, 24-bit Δ-Σ ADCs with integrated PGA, internal reference, and oscillator. The LHE790X incorporates all the features typically required for medical ECG and EEG applications. With high integration and excellent performance, the LHE790X enables scalable medical instrumentation systems with significantly reduced board space, power consumption, and overall cost.
Each channel of the LHE790X features a flexible input MUX that can be independently connected to internally generated signals for testing, temperature measurement, and lead-off detection. Additionally, any input channel configuration can be selected to generate an RLD output signal. The LHE790X operates at data rates up to 64kSPS and integrates a hardware pace detection algorithm. Lead-off detection can be implemented on-chip via pull-up/pull-down resistors or excitation current sources. Three integrated amplifiers are provided to generate the Wilson Central Terminal (WCT) and Goldberger Central Terminal (GCT) required for standard 12-lead ECG. Multiple LHE790X devices can be cascaded in a daisy-chain configuration for high channel count systems.
Package options include a compact 8mm × 8mm, 64-ball BGA and an LQFP-64. The LHE790X BGA version is rated for commercial-grade operation from 0°C to 70°C and industrial-grade operation from −40°C to +85°C.
Features
- 8 low-noise PGAs and 8 high-resolution ADCs (LHE790X)
- Low power consumption: 0.73mW per channel
- Ultra-low power mode: 0.4mW per channel
- Input-referred noise: 2.3μVₚ₋ₚ (250Hz BW, G = 6)
- Input bias current: 500pA
- Data rate: 250SPS to 64kSPS
- CMRR: –120dB
- Programmable gain: 1, 2, 3, 4, 6, 8, 12, or 24
- Supports systems compliant with AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51
- Unipolar or bipolar supply: AVDD = 2.7V to 5.25V; DVDD = 1.65V to 5.25V
- Integrated right-leg drive amplifier, lead-off detection, Wilson central terminal, pace detection, and test signal
- Enhanced DC lead-off and AC lead-off impedance detection
- Hardware-friendly pace detection algorithm interface
- Integrated oscillator and reference
- SPI-compatible serial interface
Applications
- Medical instruments (ECG, EMG, and EEG): patient monitoring; Holter monitors, event, stress, and vital signs including ECG, AED, telemedicine, bispectral index (BIS), evoked audio potential (EAP), sleep monitors.
| Qty | Unit Price | Total Amount |
|---|---|---|
| 1+ | $ 27.2058 | $ 27.21 |
| 30+ | $ 25.8014 | $ 774.04 |
Standard Packaging160/Full Tray | ||
Products Specifications
Show similar products (0) >| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Data Acquisition/Analog to Digital Converters (ADC) | |
| Manufacturer | Legendsemi | |
| Packaging | LQFP-64(10x10) | |
| Operating Temperature | -40℃~+85℃ | |
| Interface | SPI | |
| Quiescent Current (Iq) | - | |
| Voltage - Supply | 2.7V~5.25V;1.65V~5.25V | |
| Number of Channels | 8 | |
| Integral non - linearity | - | |
| Clock/Oscillator | Built-in | |
| Clock Frequency | 2.048MHz | |
| Features | Bipolar power supply;Multiplexers;Simultaneous sampling;Integrated modulator;Built-in digital filter;Built-in temperature sensor | |
| Voltage Reference | Built-in | |
| Resolution(Bits) | 24;64kHz | |
| S/N Ratio | 122dB | |
| ADC architecture | Sigma-Delta | |
| Programmable Gain | Support |
Additional Information
| Type | Details |
|---|---|
| Minimum | 1 |
| Multiple | 1 |
| Standard Packaging | 160 |
| Sales Unit | Piece |
| EDA Models | EasyEDA Model |
Introduction
LHE7904, LHE7906, and LHE7908 (LHE790X) are a family of multichannel, simultaneous-sampling, 24-bit Δ-Σ ADCs with integrated PGA, internal reference, and oscillator. The LHE790X incorporates all the features typically required for medical ECG and EEG applications. With high integration and excellent performance, the LHE790X enables scalable medical instrumentation systems with significantly reduced board space, power consumption, and overall cost.
Each channel of the LHE790X features a flexible input MUX that can be independently connected to internally generated signals for testing, temperature measurement, and lead-off detection. Additionally, any input channel configuration can be selected to generate an RLD output signal. The LHE790X operates at data rates up to 64kSPS and integrates a hardware pace detection algorithm. Lead-off detection can be implemented on-chip via pull-up/pull-down resistors or excitation current sources. Three integrated amplifiers are provided to generate the Wilson Central Terminal (WCT) and Goldberger Central Terminal (GCT) required for standard 12-lead ECG. Multiple LHE790X devices can be cascaded in a daisy-chain configuration for high channel count systems.
Package options include a compact 8mm × 8mm, 64-ball BGA and an LQFP-64. The LHE790X BGA version is rated for commercial-grade operation from 0°C to 70°C and industrial-grade operation from −40°C to +85°C.
Features
- 8 low-noise PGAs and 8 high-resolution ADCs (LHE790X)
- Low power consumption: 0.73mW per channel
- Ultra-low power mode: 0.4mW per channel
- Input-referred noise: 2.3μVₚ₋ₚ (250Hz BW, G = 6)
- Input bias current: 500pA
- Data rate: 250SPS to 64kSPS
- CMRR: –120dB
- Programmable gain: 1, 2, 3, 4, 6, 8, 12, or 24
- Supports systems compliant with AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51
- Unipolar or bipolar supply: AVDD = 2.7V to 5.25V; DVDD = 1.65V to 5.25V
- Integrated right-leg drive amplifier, lead-off detection, Wilson central terminal, pace detection, and test signal
- Enhanced DC lead-off and AC lead-off impedance detection
- Hardware-friendly pace detection algorithm interface
- Integrated oscillator and reference
- SPI-compatible serial interface
Applications
- Medical instruments (ECG, EMG, and EEG): patient monitoring; Holter monitors, event, stress, and vital signs including ECG, AED, telemedicine, bispectral index (BIS), evoked audio potential (EAP), sleep monitors.
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | |
| ECCN | - |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
| Type | Details |
|---|---|
| RoHS | |
| ECCN | - |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |