The AD7741/AD7742 are a new generation of synchronous voltage-to-frequency converters (VFCs). The AD7741 is a single-channel version in an 8-lead package (SOIC/DIP) and the AD7742 is a multichannel version in a 16-lead package (SOIC/ DIP). No user trimming is required to achieve the specified performance.

The AD7741 has a single buffered input whereas the AD7742 has four buffered inputs that may be configured as two fully-differential inputs or three pseudo-differential inputs. Both parts include an on-chip +2.5 V bandgap reference that provides the user with the option of using this internal reference or an external reference.

An evaluation board for both the AD7741 and the AD7742 is available. The model number is EVAL-AD7741/42EB, and details can be viewed by selecting the "Evaluation Tools" button to the left.

Part#	Architecture	# Channels	Input Voltage Range (V)	Full Scale Fout (kHz)	Reference Voltage (V)	Accuracy (%/kHz)	Input Clk Frequency (MHz)	Voltage Supply (V)	Supply Current (max)	Package	Price* (1000-4999)
AD537	Non-Synchronous	1-Single Ended	±11	150	1	0.25	-	+/- 5 to +/- 18	2.5	14-Lead CerDIP	$9.54
AD650	Non-Synchronous	1-Single Ended	+11	1000	-	0.1	-	+/- 9 to +/- 18	8	14-Lead CerDIP, 14-Lead PDIP, 20-Lead PLCC	$7.92
AD652	Synchronous	1-Single Ended	±10	2500	5	2	5	+/- 6 to +/- 15	15	20-Lead PLCC	$9.80
AD654	Non-Synchronous	1-Single Ended	±14	500	-	0.4	-	+/- 5 to +/- 18	2.5	8-Lead PDIP, 8-Lead SOIC	$3.72
AD7740	Synchronous	1-Single Ended	+2.5	500	2.5	1	1	3 to 5.25	1.5	8-Lead MSOP, 8-Lead SOT-23	$0.90
AD7741	Synchronous	1-Single Ended	+2.5	3072	2.5	2	6.144	4.75 to 5.25	8	8-Lead PDIP, 8-Lead SOIC	$1.74
AD7742	Synchronous	2-Differential, 3-Pseudo Differential	+3.5	3072	2.5	2	6.144	4.75 to 5.25	8	16-Lead PDIP, 16-Lead SOIC	-
ADVFC32	Non-Synchronous	1-Single Ended	+10	500	-	0.2	-	+/- 9 to +/- 18	8	14-Lead PDIP	$6.07

* 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.

This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.

Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.