The ADA4938 is a low noise, ultralow distortion, high speed differential amplifier. It is an ideal choice for driving high performance ADCs with resolutions up to 16 bits from dc to 27 MHz, or up to 12 bits from dc to 74 MHz. The output common-mode voltage is adjustable over a wide range, allowing the ADA4938 to match the input of the ADC. The internal common-mode feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

Full differential and single-ended-to-differential gain configurations are easily realized with the ADA4938. A simple external feedback network of four resistors determines the closed-loop gain of the amplifier.

The ADA4938 is fabricated using the Analog Devices, Inc. proprietary third-generation, high voltage XFCB process, enabling it to achieve very low levels of distortion with an input voltage noise of only 2.6 nV/√Hz. The low dc offset and excellent dynamic performance of the ADA4938 make it well suited for a wide variety of data acquisition and signal processing applications.

The ADA4938-1 (single amplifier) is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP. The ADA4938-2 (dual amplifier) is available in a Pb-free, 4 mm × 4 mm, 24-lead LFCSP. The pinouts have been optimized to facilitate layout and minimize distortion. The parts are specified to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

ADC drivers

Single-ended-to-differential converters

IF and baseband gain blocks

Differential buffers

Line drivers

Data Sheet, Rev. 0, 11/07

Part#	-3 dB BW (MHz)	Minimum Gain (Acl)	Voltage Supply (V)	Supply Current (max)	Slew Rate (V/us)	Distortion (2nd) (dBc)	Distortion (3rd) (dBc)	Package	Price* (1000-4999)
AD6630	700	-	+/- 5	30mA	3700	-	-	16-Lead SOIC	$4.13
AD8132	350	1	+/- 5	10.7mA	1200	-97	-100	8-Lead MSOP, 8-Lead SOIC	$1.65
AD8137	110	1	+/- 6	3.6mA	450	-85	-85	8-Lead SOIC	$1.09
AD8138	320	1	+/- 5	20mA	1500	-94	-114	8-Lead CSP, 8-Lead SOIC	$3.75
AD8139	410	1	5 to 12	24.5mA	800	-90	-105	8-Lead CSP, 8-Lead SOIC	$3.59
AD8350	900	-	4 to 11	32mA	2000	-67	-70	8-Lead SOIC/8-Lead uSOIC	$2.49
AD8351	2200	1	3 to 5.5	32mA	13000	-79	-81	10-Lead uSOIC	$2.65
AD8352	2200	-	3 to 5.5	37mA	11000	-81	-82	16-Lead LFCSP	$3.49
ADA4922-1	38	1	+/- 12	9.4mA	730	-116	-109	-	$3.59
ADA4937-1	1900	1	-	39.5mA	6000	-70	-84	16-Lead LFCSP	$3.79
ADA4939-1	1400	2	3 to 5	37.7mA	6800	-77	-95	16-Lead LFCSP	$3.79
ADA4939-2	1400	2	3 to 5	37.7mA	6800	-77	-91	16-Lead LFCSP	$5.69
ADA4941-1	30	2	-	2.3mA	22	-75	-71	8-Lead LFCSP, 8-Lead SOIC	$2.39

* 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.