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ADA4941-1:  Single-Supply, Differential 18-Bit ADC Driver

The ADA4941-1 is a low power, low noise differential driver for ADCs up to 18 bits in systems that are sensitive to power. The ADA4941-1 is configured in an easy-to-use, single-ended-to-differential configuration and requires no external components for a gain of 2 configuration. A resistive feedback network can be added to achieve gains greater than 2. The ADA4941-1 provides essential benefits, ...More

ADA4941-1:  Single-Supply, Differential 18-Bit ADC Driver

Product Description

The ADA4941-1 is a low power, low noise differential driver for ADCs up to 18 bits in systems that are sensitive to power. The ADA4941-1 is configured in an easy-to-use, single-ended-to-differential configuration and requires no external components for a gain of 2 configuration. A resistive feedback network can be added to achieve gains greater than 2. The ADA4941-1 provides essential benefits, such as low distortion and high SNR, that are required for driving high resolution ADCs.

With a wide input voltage range (0 V to 3.9 V on a single 5 V supply), rail-to-rail output, high input impedance, and a user-adjustable gain, the ADA4941-1 is designed to drive single-supply ADCs with differential inputs found in a variety of low power applications, including battery-operated devices and single-supply data acquisition systems.

The ADA4941-1 is ideal for driving the 16-bit and 18-bit PulSAR® ADCs such as the AD7687, AD7690, and AD7691.

The ADA4941-1 is manufactured on ADI’s proprietary second-generation XFCB process, which enables the amplifier to achieve 18-bit performance on low supply currents.

The ADA4941-1 is available in a small 8-lead LFCSP as well as a standard 8-lead SOIC and is rated to work over the extended industrial temperature range, −40°C to +125°C.

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  • Single-ended-to-differential converter
  • Excellent linearity
    Distortion −110 dBc @100 KHz for VO, dm = 2 V p-p
  • Low noise: 10.2 nV/√Hz, output-referred, G = 2
  • Extremely low power: 2.2 mA (3 V supply)
  • High input impedance: 24 MΩ
  • User-adjustable gain
  • High speed: 31 MHz, −3 dB bandwidth (G = +2)
  • Fast settling time: 300 ns to 0.005% for a 2 V step
  • Low offset: 0.8 mV max, output-referred, G = 2
  • Rail-to-rail output
  • See data sheet for additional features
  • -3 dB BW (MHz): 30MHz
  • Minimum Gain (Acl): 2
  • Supply Current : 2.3mA
  • Slew Rate (V/us): 22V/µs
  • Distortion (2nd) (dBc): -75dBc
  • Distortion (3rd) (dBc): -71dBc
  • Package: 8-Lead LFCSP,8-Lead SOIC

ADA4941-1 Functional Block Diagram

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Part# -3 dB BW (MHz) Minimum Gain (Acl) Voltage Supply (V) Supply Current Slew Rate (V/us) Distortion (2nd) (dBc) Distortion (3rd) (dBc) Package Price* (1000-4999)
AD6630 700 - +/- 5 30mA 3700 - - 16-Lead SOIC $4.18
AD8132 350 1 +/- 5 10.7mA 1200 -97 -100 8-Lead MSOP, 8-Lead SOIC $1.67
AD8137 110 1 +/- 6 3.6mA 450 -85 -85 8-Lead SOIC $1.10
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 $3.75
AD8350 900 - 4 to 11 28mA 2000 -66 -65 8-Lead SOIC/8-Lead uSOIC $2.52
AD8351 2200 1 3 to 5.5 28mA 13000 -79 -81 10-Lead uSOIC $2.68
AD8352 2200 - 3 to 5.5 37mA 11000 -83 -83 16-Lead LFCSP $3.53
ADA4922-1 38 1 +/- 12 9.4mA 730 -116 -109 - $3.63
ADA4927-1 2300 1 4.5 to 11 22.1mA 5000 -87 -89 16-Lead LFCSP $3.79
ADA4927-2 2300 1 4.5 to 11 22.1mA 5000 -87 -89 24-Lead LFCSP $6.29
ADA4932-1 560 1 3 to 11 9.6mA 410 -72 -80 16-Lead LFCSP $2.95
ADA4932-2 560 1 3 to 11 9.6mA 410 -72 -80 24-Lead LFCSP $5.29
ADA4937-1 1900 1 3 to 5.25 39.5mA 6000 -70 -84 16-Lead LFCSP $3.79
ADA4937-2 1900 1 3 to 5.25 42mA 6000 -77 -84 16-Lead LFCSP, 24-Lead LFCSP $5.69
ADA4938-1 1000 1 4.5 to 11 40mA 4700 -82 -82 16-Lead LFCSP, 24-Lead LFCSP $3.79
ADA4938-2 1000 1 4.5 to 11 36.5mA 4700 -82 -82 16-Lead LFCSP, 24-Lead LFCSP $5.69
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 $2.42
ADA4950-1 750 1 3 to 11 9.5mA 2900 -80 -84 16-Lead LFCSP, 24-Lead LFCSP $2.99
ADA4950-2 750 1 3 to 11 9.5mA 2900 -80 -84 16-Lead LFCSP, 24-Lead LFCSP $5.29
ADL5561 2900 6 3.3 40mA 9800 -95 -87 16-Lead LFCSP $3.68
ADL5562 3300 6 3.3 80mA 9800 -104 -87 16-Lead LFCSP $3.68
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* 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.
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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
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*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.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.