Changsha Purple Horn E-Commerce Co., Ltd.
| Voltage - Supply | 2.7V~5.5V |
| Operating Temperature | -40℃~+105℃ |
| Interface | SPI |
| Description | SPI TSSOP-14 Gas Sensor RoHS |
| Mfr. Part # | MS91051 |
| Package | TSSOP-14 |
| Model Number | MS91051 |
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Product Specification
| Voltage - Supply | 2.7V~5.5V | Operating Temperature | -40℃~+105℃ |
| Interface | SPI | Description | SPI TSSOP-14 Gas Sensor RoHS |
| Mfr. Part # | MS91051 | Package | TSSOP-14 |
| Model Number | MS91051 |
The MS91051 is a configurable analog front-end for Non-Dispersive Infrared (NDIR) sensors. It features a dual-channel design with a programmable gain amplifier (PGA) and offset cancellation for the "dark phase." The device supports multiple thermopile sensors due to its programmability, outputting a voltage proportional to the thermopile voltage. It includes an adjustable common-mode generator (1.15V or 2.59V) to enhance output dynamic range and dedicated pins (A0, A1) for external signal filtering (high-pass, low-pass, or band-pass) to remove out-of-band noise. Programming is done via an SPI interface. The MS91051 is suitable for applications requiring precise gas sensing, including NDIR sensors, demand-controlled ventilation, building monitoring, automotive CO2 and alcohol detection, industrial safety, and greenhouse gas/freon detection.
| Parameter | Symbol | Test Conditions | Min | Typical | Max | Unit |
| Power Supply | ||||||
| Supply Voltage | VDD | 2.7 | 3.3 | 5.5 | V | |
| Digital I/O Voltage | VIO | 2.7 | 3.3 | 5.5 | V | |
| Supply Current (All analog modules ON) | IDD | 3.1 | 3.9 | 4.2 | mA | |
| Shutdown Supply Current (All analog modules OFF) | 45 | 75 | 121 | A | ||
| Digital Supply Current | 8 | A | ||||
| Programmable Gain Amplifier (PGA1) | ||||||
| Bias Current | IBIAS | RL=10k, CL =15pF | 5 | 200 | pA | |
| Max Input Signal (High Gain Mode) | VINMAX_HGM | Before limiting, including dark voltage and signal | 2 | mV | ||
| Max Input Signal (Low Gain Mode) | VINMAX_LGM | 12 | mV | |||
| Input Offset Voltage | VOS | -165 | V | |||
| Gain (High Gain Mode) | G_HGM | 246 | V/V | |||
| Gain (Low Gain Mode) | G_LGM | 41 | V/V | |||
| Gain Error | GE | All gains | 2.5 | % | ||
| Output Voltage Range | VOUT | 0.5 | 0.5*VDD | V | ||
| Phase Delay | PhDly | 1mV input, HGM, measured at Vdd/2 | 6 | s | ||
| Phase Delay vs. Temperature | TcPhDly | 1mV input, HGM, measured at Vdd/2 | 416 | ns | ||
| Small Signal Bandwidth | SSBW | Vin = 1mVpp, Gain = 250 V/V | 18 | kHz | ||
| Input Capacitance | Cin | 100 | pF | |||
| Programmable Gain Amplifier (PGA2) | ||||||
| Max Input Signal | VINMAX | GAIN=4V/V | 1.65 | V | ||
| Min Input Signal | VINMAN | 0.82 | V | |||
| Gain | G | 4 programmable gains | 4 to 32 | dB | ||
| Gain Error | GE | All gains | 2.5 | % | ||
| Output Voltage Range | VOUT | 0.2*VDD | 0.2*VDD | V | ||
| Phase Delay | PhDly | 100mV input, 35kHz sine, Gain=8, measured at 1.65V, RL=10k | 1 | s | ||
| Phase Delay vs. Temperature | TcPhDly | 250mV input, 35kHz sine, Gain=8, measured at VDD/2 | 84 | ns | ||
| Small Signal Bandwidth | SSBW | Gain = 32 V/V | 360 | kHz | ||
| Input Capacitance | Cin | 5 | pF | |||
| Combined PGA1 & PGA2 | ||||||
| Input Noise Density | en | 86K resistor, 5Hz, Gain=7986 | 30 | nVHz | ||
| Input Referred Integrated Noise | Includes current and voltage noise, 86K resistor, 0.1-10Hz, Gain=7986 | 0.1 to 0.12*4 | Vrms | |||
| Gain | GAIN | PGA1 GAIN=42, PGA2 GAIN=4 | 167 | V/V | ||
| Gain | GAIN | PGA1 GAIN=42, PGA2 GAIN=8 | 335 | V/V | ||
| Gain | GAIN | PGA1 GAIN=42, PGA2 GAIN=16 | 669 | V/V | ||
| Gain | GAIN | PGA1 GAIN=42, PGA2 GAIN=32 | 1335 | V/V | ||
| Gain | GAIN | PGA1 GAIN=250, PGA2 GAIN=4 | 1002 | V/V | ||
| Gain | GAIN | PGA1 GAIN=250, PGA2 GAIN=8 | 2004 | V/V | ||
| Gain | GAIN | PGA1 GAIN=250, PGA2 GAIN=16 | 4003 | V/V | ||
| Gain | GAIN | PGA1 GAIN=250, PGA2 GAIN=32 | 7986 | V/V | ||
| Gain Error | GE | All gains | 5 | % | ||
| Gain Temperature Coefficient | TCCGE | Gain = 167 to 1335 V/V | 6 | ppm/C | ||
| Gain Temperature Coefficient | TCCGE | Gain = 1002 to 7986 V/V | 20 | ppm/C | ||
| Power Supply Rejection Ratio | PSRR | DC, 3.0V to 3.6V supply, gain = 1002V/V | 90 | 110 | dB | |
| Phase Delay | PhDly | 1mV input, gain=1002 V/V, measured at midpoint | 9 | s | ||
| Phase Delay vs. Temperature | TCPhDly | 1mV input, gain=1002 V/V, measured at midpoint | 300 | ns | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=167V/V | 70 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=335V/V | 100 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=669V/V | 160 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=1335V/V | 290 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=1002V/V | 230 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=2004V/V | 420 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=4003V/V | 800 | V/C | ||
| Output Offset Voltage Temp Drift | TCVOS | GAIN=7986V/V | 1550 | V/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 | % | ||||
| Common-Mode Output Load Capacitance | CLOAD | 10 | nF | |||
| SPI Interface | ||||||
| Logic High Input Voltage | VIH | 0.7VDD | V | |||
| Logic Low Input Voltage | VIL | 0.8 | V | |||
| Logic High Output Voltage | VOH | 2.6 | V | |||
| Logic Low Output Voltage | VOL | 0.4 | V | |||
| Digital Input Leakage Current | IIH/IIL | -100 | 200 | nA | ||
| SPI Timing Parameters | ||||||
| Wake-up Time | tWU | 1 | ms | |||
| Continuous Clock Frequency | fSCLK | 10 | MHz | |||
| SCLK High Pulse Width | tPH | 0.4/fSCLK | ns | |||
| SCLK Low Pulse Width | tPL | 0.4/fSCLK | ns | |||
| CSB Setup Time | tCSS | 10 | ns | |||
| CSB Hold Time | tCSH | 10 | ns | |||
| SDI Setup Time before SCLK rising edge | tSU | 10 | ns | |||
| SDI Hold Time before SCLK rising edge | tSH | 10 | ns | |||
| SDO Disable Time after CSB rising edge | tDOD1 | 45 | ns | |||
| SDO Disable Time after 16th SCLK rising edge | tDOD2 | 45 | ns | |||
| SDO Enable Time at 8th SCLK falling edge | tDOE | 35 | ns | |||
| SDO Access Time after SCLK falling edge | tDOA | 35 | ns | |||
| SDO Hold Time after SCLK falling edge | tDOH | 5 | ns | |||
| SDO Rise Time | tDOR | 5 | ns | |||
| SDO Fall Time | tDOF | 5 | ns | |||
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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