Changsha Purple Horn E-Commerce Co., Ltd.
| Voltage - Supply | 2.7V~5.5V |
| Operating Temperature | -40℃~+105℃ |
| Interface | SPI |
| Description | SPI MSOP-10 Gas Sensor RoHS |
| Mfr. Part # | MS91050 |
| Package | MSOP-10 |
| Model Number | MS91050 |
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Product Specification
| Voltage - Supply | 2.7V~5.5V | Operating Temperature | -40℃~+105℃ |
| Interface | SPI | Description | SPI MSOP-10 Gas Sensor RoHS |
| Mfr. Part # | MS91050 | Package | MSOP-10 |
| Model Number | MS91050 |
The MS91050 is a single-channel analog front-end for Non-Dispersive Infrared (NDIR) gas sensors. It outputs a voltage proportional to the thermopile voltage, offering programmability to support various thermopile sensors. Key features include a programmable gain amplifier, "dark phase" offset cancellation, and an adjustable common-mode generator (1.15V or 2.59V) to enhance output dynamic range. Additional signal filtering (high-pass, low-pass, or band-pass) can be implemented via dedicated pins (A0 and A1) to mitigate out-of-band noise. Programming is accessible via an SPI interface. The device operates within a voltage range of 2.7V to 5.5V.
Advantages: Programmable gain amplifier, "dark phase" offset cancellation, external filtering support, common-mode generator with 8-bit DAC.
Applications: NDIR sensors, demand-controlled ventilation, building monitoring, automotive CO2 cabin control, automotive alcohol detection, industrial safety and security, greenhouse gas & Freon detection platforms.
| Parameter | Symbol | Test Conditions | Min | Typ | Max | Unit |
| Power Supply | ||||||
| Power Supply Voltage | VDD | 2.7 | 3.3 | 5.5 | V | |
| Supply Current | IDD | All analog modules ON | 3.1 | 3.9 | mA | |
| Shutdown Supply Current | All analog modules OFF | 45 | 75 | μA | ||
| Digital Supply Current | 8 | μA | ||||
| Programmable Gain Amplifier (PGA1) | ||||||
| Bias Current | IBIAS | RL=10kΩ, CL =15pF | 5 | 200 | pA | |
| Max Input Signal (High Gain) | VINMAX_HGM | Reference to CMOUT voltage, before limiting | ±2 | mV | ||
| Max Input Signal (Low Gain) | VINMAX_LGM | ±12 | mV | |||
| Input Offset Voltage | VOS | -165 | μV | |||
| High Gain Mode | G_HGM | 246 | V/V | |||
| Low Gain Mode | G_LGM | 41 | V/V | |||
| Gain Error | GE | All gains | 2.5 | % | ||
| Output Voltage Range | VOUT | 0.5 | VDD-0.5 | V | ||
| Small Signal Bandwidth | SSBW | Vin = 1mVpp, Gain = 246 V/V | 18 | kHz | ||
| Input Capacitance | Cin | 100 | pF | |||
| Programmable Gain Amplifier (PGA2) | ||||||
| Max Input Signal | VINMAX | GAIN=4V/V, RS =1kΩ, CL =1µF | 1.65 | V | ||
| Min Input Signal | VINMAN | 0.82 | V | |||
| Gain | G | 4 programmable gains | 4 | 32 | dB | |
| Gain Error | GE | All gains | 2.5 | % | ||
| Output Voltage Range | VOUT | 0.2 | VDD-0.2 | V | ||
| Small Signal Bandwidth | SSBW | Gain = 32 V/V | 360 | kHz | ||
| Input Capacitance | Cin | 5 | pF | |||
| Combined PGA1 & PGA2 | ||||||
| Gain | GAIN | PGA1 GAIN=41, PGA2 GAIN=4 | 163 | V/V | ||
| Gain | GAIN | PGA1 GAIN=41, PGA2 GAIN=32 | 1303 | V/V | ||
| Gain | GAIN | PGA1 GAIN=246, PGA2 GAIN=4 | 980 | V/V | ||
| Gain | GAIN | PGA1 GAIN=246, PGA2 GAIN=32 | 7840 | V/V | ||
| Gain Error | GE | All gains | 5 | % | ||
| Gain Temperature Coefficient | TCCGE | Gain = 163V/V to 1303V/V | 6 | ppm/ °C | ||
| Gain Temperature Coefficient | TCCGE | Gain = 980V/V to 7840V/V | 20 | ppm/ °C | ||
| PSRR | PSRR | DC, 3.0V to 3.6V supply, gain = 980V/V | 90 | 110 | dB | |
| Output Offset Voltage Temp Drift | TCVOS | GAIN=163V/V | 70 | μV/°C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=7840V/V | 1550 | μV/°C | ||
| Common Mode Generator | ||||||
| Common Mode Voltage | VCM | VDD=3.3V | 1.15 | V | ||
| Common Mode Voltage | VCM | VDD=5V | 2.59 | V | ||
| Common Mode Voltage Accuracy | 2 | % | ||||
| SPI Interface | ||||||
| Logic High Voltage | VIH | 0.7×VDD | V | |||
| Logic Low Voltage | VIL | 0.8 | V | |||
| Logic Output High Voltage | VOH | 2.6 | V | |||
| Logic Output Low Voltage | VOL | 0.4 | V | |||
| Wake-up Time | tWU | 1 | ms | |||
| Continuous Clock Frequency | fSCLK | 10 | MHz | |||
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer
Year Established:
2009
Employee Number:
300~500
Ecer Certification：
Verified Supplier
Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...
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