Application guide

Field instrumentation

Explore signal conditioning, digitization and communication for process sensors and surface oil-and-gas instruments.

4 functional blocks8 components for evaluationCompare all parameters ↓

Explore the system

Component building blocks

01Sensor signal conditioning2 components 02Analog data acquisition2 components 03Measurement reference2 components 04Wired equipment interfaces2 components

Functional blocks for selection; device connections and component values depend on your design.

FUNCTION / 01

Sensor signal conditioning

Condition low-level differential and sensor signals using instrumentation or zero-drift amplifiers. Check sensor bias, common-mode range and bandwidth.

BIF620 Instrumentation amplifierPackage: SOP-8 BIF8552 Dual-channel zero-drift operational amplifierPackage: SOP-8

FUNCTION / 02

Analog data acquisition

Digitize analog signals using the channel count, resolution, sample rate and interface recorded for each ADC.

BI7606PMC 8-channel, 16-bit ADCPackage: LQFP64 BI1115PMC 4-channel, 16-bit ADC with I²C interfacePackage: MSOP-10

FUNCTION / 03

Measurement reference

Provide a voltage reference for an analog measurement path; select the output voltage and accuracy for the converter design.

BIW584PMC Voltage ReferencesPackage: SOP-8 BIW586PMC Voltage ReferencesPackage: SOP-8

FUNCTION / 04

Wired equipment interfaces

Provide RS-485 or isolated RS-422/RS-485 communication between equipment controllers.

BI3485 RS-485 transceiverPackage: SOP8/TSSOP8 BI83086PMC Isolated RS-422/RS-485 transceiverPackage: SOIC-16

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Electrical parameters & cross references

All handbook parameters for the components shown above. Scroll each table horizontally to view every column.

Instrumentation Amplifiers

BI Part Number	Cross Reference	Function	Supply voltage (V)	Input offset voltage (µV)	Input bias current (nA)	Supply current (mA)	Gain bandwidth (MHz)	Slew rate (V/µs)	Package
BIF620	AD620	Instrumentation amplifier	±15	125	28	1.7	0.001	1.2	SOP-8

Zero-drift Operational Amplifiers

BI Part Number	Cross Reference	Function	Channels	Supply voltage (V)	Input offset voltage (µV)	Input bias current (nA)	Supply current (mA)	Gain bandwidth (MHz)	Slew rate (V/µs)	Package
BIF8552	AD8552	Dual-channel zero-drift operational amplifier	2	5.5	15	1	0.58	2	0.8	SOP-8

Analog-to-digital Converters

BI Part Number	Cross Reference	Function	Channels	Resolution (bits)	SNR (dB)	INL	Maximum sample rate (MSPS)	Interface	Package
BI7606PMC	AD7606	8-channel, 16-bit ADC	8	16	92	±1LSB	0.2	SPI, Parallel	LQFP64
BI1115PMC	ADS1115	4-channel, 16-bit ADC with I²C interface	4	16	—	1LSB	0.002	I2C	MSOP-10

Voltage References

BI Part Number	Cross Reference	Function	Reference voltage (V)	Initial accuracy	Input voltage (V)	Output current (A)	Noise	Temperature drift (ppm/°C)	Package
BIW584PMC	AD584	Voltage References	Programmable(10V/7.5V/5V/2.5V)	±0.1%	~40V	±10mA	50µVpp(0.1Hz~10Hz)	10	SOP-8
BIW586PMC	AD586	Voltage References	5	±0.2%	~40V	±10mA	10µVpp(0.1Hz~10Hz)	10	SOP-8

RS-232 / RS-422 / RS-485

BI Part Number	Cross Reference	Function	Supply voltage (V)	Data rate (Mbps)	ESD (kV)	Quiescent current (mA)	Common-mode range (V)	Package
BI3485	AMT0114B / MAX3485	RS-485 transceiver	3.3	12	—	0.5	-7–12	SOP8/TSSOP8

Isolated Transceivers

BI Part Number	Cross Reference	Function	Interface	Supply voltage (V)	Control-pin voltage	Bus-side input voltage (V)	Output current (A)	Package
BI83086PMC	GL2941 / NSi83086	Isolated RS-422/RS-485 transceiver	Full-duplex RS-422 / RS-485	-0.5–6	−0.5 V to (VCC1+0.5) V	±15	±10 mA	SOIC-16

Selection based on documented BI component functions. Cross references are comparison aids and do not establish drop-in compatibility or transfer another manufacturer’s qualification.