LMP91200

ACTIVO

AFE integrada para aplicaciones de detección de pH de baja potencia

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document-pdfAcrobat LMP91200 Configurable AFE for Low Power Chemical Sensing Apps datasheet (Rev. E) (Inglés)

LMP91200

ACTIVO

Hoja de datos

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Detalles del producto

Number of input channels

1

Features

Current Sources (iDACs), PGA

Operating temperature range (°C)

-40 to 125

Vs (min) (V)

1.8

Vs (max) (V)

6

Interface type

Serial SPI

Rating

Catalog

Number of input channels

1

Features

Current Sources (iDACs), PGA

Operating temperature range (°C)

-40 to 125

Vs (min) (V)

1.8

Vs (max) (V)

6

Interface type

Serial SPI

Rating

Catalog

TSSOP (PW)

16

32 mm² (5 mm × 6.4 mm)

Active Guarding
Key Specifications
Unless otherwise noted, typical values at
T_A = 25°C, V_S = (VDD-GND) = 3.3 V

pH Buffer Input Bias Current (0 < V_INP < 3.3 V)
- Maximum at 25°C: ±125 fA
- Maximum at 85°C: ±445 fA
pH Buffer Input Bias Current
(–500 mV < V_INP– V_CM < 500 mV),
V_S = (VDD – GND) = 0 V
- Maximum at 25°C: ±600 fA
- Maximum at 85°C: ±6.5 pA
pH Buffer Input Offset Voltage: ±200 µV
pH Buffer Input Offset Voltage Drift: ±2.5 µV/°C
Supply Current: 50 µA
Supply Voltage: 1.8 V to 5.5 V
Operating Temperature Range: –40°C to 125°C
Package: 16-Pin TSSOP

Active Guarding
Key Specifications
Unless otherwise noted, typical values at
T_A = 25°C, V_S = (VDD-GND) = 3.3 V

pH Buffer Input Bias Current (0 < V_INP < 3.3 V)
- Maximum at 25°C: ±125 fA
- Maximum at 85°C: ±445 fA
pH Buffer Input Bias Current
(–500 mV < V_INP– V_CM < 500 mV),
V_S = (VDD – GND) = 0 V
- Maximum at 25°C: ±600 fA
- Maximum at 85°C: ±6.5 pA
pH Buffer Input Offset Voltage: ±200 µV
pH Buffer Input Offset Voltage Drift: ±2.5 µV/°C
Supply Current: 50 µA
Supply Voltage: 1.8 V to 5.5 V
Operating Temperature Range: –40°C to 125°C
Package: 16-Pin TSSOP

The LMP91200 device is a sensor AFE for use in low-power, analytical-sensing applications. The LMP91200 is designed for 2-electrode sensors. This device provides all of the functionality needed to detect changes based on a delta voltage at the sensor. Optimized for low-power applications, the LMP91200 works over a voltage range of 1.8 V to 5.5 V. With its extremely low input bias current it is optimized for use with pH sensors. Also, in absence of supply voltage the very low input bias current reduces degradation of the pH probe when connected to the LMP91200. Two guard pins provide support for high parasitic impedance wiring. Depending on the configuration, total current consumption for the device is 50 µA while measuring pH. Available in a 16-pin TSSOP package, the LMP91200 operates from –40°C to +125°C.

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	LMP91200 Configurable AFE for Low Power Chemical Sensing Apps datasheet (Rev. E)		29/02/2016
	Artículo técnico	What can we learn for IIoT from the man who invented the Web?	PDF \| HTML	12/01/2016
	Nota sobre la aplicación	AN-2254 MSP430 Interface to LMP91200 Code Library (Rev. A)		1/05/2013
	Más documentación	Sensor Analog Front Ends Brochure		30/10/2012

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