Additional 5B Resources: 5B Series Model Definitions, Accessories, Backplanes and Power Supplies
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Model 5B35 converts the input from a wide variety of RTD types to a linearized, high accuracy output of 0 V to +5 V. The module provides transformer isolation, RTD excitation, RTD lead-resistance compensation, signal filtering and input protection against line voltage connection. A series output switch eliminates the need for external multiplexing. The industry standard 5B Series encapsulated plug-in modular package is compatible with all 5B backplanes. Modules are powered by +5 V dc, ±5%.

Signal isolation is provided by transformer coupling using a proprietary technique for linear, stable performance. A demodulator on the output side of the signal transformer recovers the input signal, which is filtered and buffered to provide an accurate, low impedance, low noise output.

True three-port isolation includes common-mode voltage of: 1500 V rms between input and output, and between input and power; 250 V rms between output and power.

The modules provide RTD excitation from a precision current source. A low drift, chopper stabilized, differential amplifier design allows for the use of very low RTD excitation currents to minimize accuracy losses from self-heating of the RTD. The low input offset drift of ±0.01°C/°C and gain drift of ±30 ppm/°C assure that accuracy is maintained over a wide operating temperature range.

The four-wire configuration of the 5B35 supplies the RTD excitation current through two leads that are not the signal input leads. Because there is no excitation current in the signal input leads, the lead lengths or resistances have no effect on the RTD measurement.

An optimized five-pole Butterworth filter (with 4 Hz bandwidth) provides 116 dB of normal-mode rejection at 60 Hz and 108 dB at 50 Hz. Output noise is an exceptionally low 0.3 mV p-p at 100 kHz bandwidth and 6 mV p-p at 5 MHz bandwidth.

The input circuit is protected against accidental application of voltages, such as an ac power line, up to 240 V rms continuous.

A series output switch is included to eliminate the need for external multiplexing in many applications. This switch has a low output resistance and is controlled by an active-low enable input. When the output switch is not used, ground the enable input to I/O common to turn on the switch.

Part#	Supply Voltage (v)	Input Type	Isolated	Bandwidth (Hz)	Output Range	Output Type	Input Range	Price* (1000-4999)
1B21	±15	Vin	Y	100	4-20mA, 0-20mA	I	0-1V to 0-10V	$53.44
1B22	±15	Vin	Y	400	4-20mA, 0-20mA	V	0-1V to 0-10V	$73.33
1B31	±15	Gage	Y	20000	+/- 10V	V	Refer to Data Sheet	$188.24
1B32	±15	Gage	N	4	+/- 10V	V	Refer to Data Sheet	-
1B41	±15	RTD	Y	3	+/- 10V	V	Refer to Data Sheet	$110.09
1B51	±15	TC	Y	3	+/- 10V	V	Refer to Data Sheet	$100.26
3B16	±15	Gage	N	3	4-20mA, 0-20mA	I, V	+/- 5mV to +/- 500mV	$142.33
3B17	±15	LVDT, RVDT	N	100	+/- 10V, 4-20mA, 0-20mA	I, V	20mV rms to 5V rms	$212.20
3B18	±15	Gage	N	10000	+/- 10V, 4-20mA, 0-20mA	I, V	+/- 5mV to +/- 500mV	$154.77
3B20	±15	AC Gage	N	100	+/- 10V, 4-20mA, 0-20mA	I, V	1.5mV rms to 150mV rms	$204.72
3B30	±15	mV	Y	3	+/- 10V, 4-20mA, 0-20mA	I, V	+/- 5mV to +/- 500mV	$159.61
3B31	±15	V	Y	3	+/- 10V, 4-20mA, 0-20mA	I, V	+/- .5V to +/- 20V	$159.61
3B32	±15	I	Y	3	+/- 10V, 4-20mA, 0-20mA	I, V	0-20mA, 4-20mA	$159.61
3B34	±15	RTD	Y	3	0-10V, 4-20mA, 0-20mA	I, V	Refer to Data Sheet	$193.04
3B37	±15	TC	Y	3	0-10V, 4-20mA, 0-20mA	I, V	Refer to Data Sheet	$175.49
3B40	±15	mV	Y	10000	+/- 10V, 4-20mA, 0-20mA	I, V	+/- 5mV to +/- 500mV	$180.02
3B41	±15	V	Y	10000	+/- 10V, 4-20mA, 0-20mA	I, V	+/- .5V to +/- 20V	$182.86
3B42	-15	AC mV	Y	3	0-10V, 4-20mA, 0-20mA	I, V	20mV rms to 1V rms	$190.44
3B43	±15	AC V	Y	3	0-10V, 4-20mA, 0-20mA	I, V	1V rms to 50V rms	$194.24
3B44	±15	AC V	Y	3	+/- 10V, 4-20mA, 0-20mA	I, V	50V rms to 550V rms	$194.24
3B45	±15	Frequency	Y	n/a	0-10V, 4-20mA, 0-20mA	I, V	25 Hz to 1100 Hz	$188.62
3B46	±15	Frequency	Y	n/a	+/- 10V, 4-20mA, 0-20mA	I, V	520 Hz to 25 kHz	$189.21
3B47	±15	TC	Y	3	0 to +10V, 4-20mA, 0-20mA	V	Refer to Data Sheet	$217.64
5B30	+5	mV	Y	4	+/- 5V, 0-5V	V	+/-10mv to +/- 100mV	$88.57
5B31	+5	V	Y	4	+/- 5V, 0-5V	V	+/- 1V to +/- 20V	$88.57
5B32	+5	I	Y	4	+/- 5V, 0-5V	V	0-20mA, 4-20mA	$88.57
5B34	+5	RTD	Y	4	0-5V	V	Refer to Data Sheet	$88.57
5B35	+5	RTD	Y	4	0-5V	V	Refer to Data Sheet	$108.96
5B36	+5	Potentiometer	Y	4	0-5V	V	0-10kohm	$116.93
5B37	+5	TC	Y	4	+/- 5V, 0-5V	V	Refer to Data Sheet	$88.57
5B38	+5	Gage	Y	10000	+/- 5V	V	+/-10mv to +/- 200mV	$106.29
5B39	+5	V	Y	400	4-20mA, 0-20mA	I	+/- 5V, 0-5V	$88.57
5B40	+5	mV	Y	10000	+/- 5V, 0-5V	V	+/-10mv to +/- 100mV	$88.57
5B41	+5	V	Y	10000	+/- 5V, 0-5V	V	+/- 1V to +/- 20V	$88.57
5B42	+5	I	Y	100	1-5V, 2-10V	V	0-20mA, 4-20mA	$116.93
5B45	+5	Frequency	Y	n/a	+/- 5V, 0-5V	V	500 Hz to 20 kHz	$106.29
5B46	+5	Frequency	Y	n/a	+/- 5V, 0-5V	V	20 kHz to 275 kHz	$106.29
5B47	+5	TC	Y	4	0-5V	V	Refer to Data Sheet	$116.93
6B50	+5	Digital	N	1000	RS-485 or RS-232	Serial RS-485	TTL or CMOS	$116.90
7B14	+24	RTD	N	3	0-10V, 1-5V	V	Refer to Data Sheet	$55.52
7B27	+24	TC	Y	3	0-10V, 1-5V	V	Refer to Data Sheet	$69.44
7B30	+24	mV	Y	3	0-10V, 1-5V	V	+/- 10mV to +/- 1V	$81.70
7B31	+24	V	Y	3	0-10V, 1-5V	V	+/- 5V to +/- 50V	$81.70
7B32	+24	I	Y	100	0-10V, 1-5V	V	0-20mA, 4-20mA	$70.00
7B33	+24	V or mA	Y	100	0-10V, 1-5V	V	0-5V, 1-5V	$61.28
7B34	+24	RTD	Y	3	0-10V, 1-5V	V	Refer to Data Sheet	$85.41
7B35	+24	I	Y	100	0-10V, 1-5V	V	4-20mA	$83.65
7B37	+24	TC	Y	3	0-10V, 1-5V	V	Refer to Data Sheet	$81.70
7B39	+24	V	Y	100	4-20mA, 0-20mA	I	0-10V, 1-5V	$69.44
7B40	+24	mV	Y	10000	0-10V, 1-5V	V	+/- 10mV to +/- 1V	$93.58
7B41	+24	V	Y	10000	0-10V, 1-5V	V	+/- 5V to +/- 50V	$94.70
7B47	+24	TC	Y	3	0-10V, 1-5V	V	Refer to Data Sheet	$107.70

* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.

The model number is a specific version of a generic that can be purchased or sampled.

Status indicates the current lifecycle of the product. This can be one of 4 stages:

• Pre-Release: The model has not been released to general production, but samples may be available.
• Production: The model is currently being produced, and generally available for purchase and sampling.
• Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
• Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).

The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

This is the acceptable operating range of the device. The various ranges specified are as follows:

• Commercial: 0 to +70 degrees Celsius
• Military : -55 to +125 degrees Celsius
• Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
• Automotive: -40 to +125 degrees Celsius

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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