Catalogs >
Analog Devices >
ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet
28Pages

Catalog excerpts

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 1

Low Power Differential ADC Driver ADA4932-1/ADA4932-2 Data Sheet ADC drivers Single-ended-to-differential converters IF and baseband gain blocks Differential buffers Line drivers DIGITAL OUTPUTS Figure 2. ADC Driver Test Circuit (Data Shown in Figure 3) 0 –20 –40 AMPLITUDE (dB) FUNCTIONAL BLOCK DIAGRAM High performance at low power High speed −3 dB bandwidth of 560 MHz, G = 1 0.1 dB gain flatness to 300 MHz Slew rate: 2800 V/μs, 25% to 75% Fast 0.1% settling time of 9 ns Low power: 9.6 mA per amplifier Low harmonic distortion 100 dB SFDR at 10 MHz 90 dB SFDR at 20 MHz Low input voltage noise: 3.6 nV/√Hz ±0.5 mV typical input offset voltage Externally adjustable gain Can be used with gains less than 1 Differential-to-differential or single-ended-to-differential operation Adjustable output common-mode voltage Input common-mode range shifted down by 1 VBE Wide supply range: +3 V to ±5 V Available in 16-lead and 24-lead LFCSP packages Figure 3. AD7626 Output, 64,000 Point, FFT Plot −1 dBFS Amplitude 2.40173 MHz Input Ton, 10.000 MSPS Sampling Rate GENERAL DESCRIPTION The ADA4932 family is the next generation AD8132 with higher performance, and lower noise and power consumption. It is an ideal choice for driving high performance ADCs as a single-ended-to-differential or differential-to-differential amplifier. The output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4932 family output to match the input of the ADC. The internal feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products. With the ADA4932 family, differential gain configurations are easily realized with a simple external four-resistor feedback network that determines the closed-loop gain of the amplifier. The ADA4932 family is fabricated using the Analog Devices, Inc., proprietary silicon-germanium (SiGe) complementary bipolar process, enabling it to achieve low levels of distortion and noise at low power consumption. The low offset and excellent dynamic performance of the ADA4932 family make it well suited for a wide variety of data acquisition and signal processing applications. The ADA4932-1 is available in a 16-lead LFCSP and the ADA4932-2 is available in a 24-lead LFCSP. The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4932 family is specified to operate over the −40°C to +105°C temperature range; both operate on supplies between +3 V and ±5 V. Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2008–2014 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com

Open the catalog to page 1

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 2

Data Sheet REVISION HISTORY

Open the catalog to page 2

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 3

Data Sheet SPECIFICATIONS ±5 V OPERATION TA = 25°C, +VS = 5 V, −VS = −5 V, VOCM = 0 V, RF = 499 Ω, RG = 499 Ω, RT = 53.6 Ω (when used), RL, dm = 1 kΩ, unless otherwise noted. All specifications refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 55 for signal definitions. ±DIN to VOUT, dm Performance Table 1. Parameter DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% Overdrive Recovery Time NOISE/HARMONIC PERFORMANCE Second Harmonic Third Harmonic IMD Voltage...

Open the catalog to page 3

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 4

Data Sheet VOCM to VOUT, cm Performance Table 2. Parameter VOCM DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Slew Rate Input Voltage Noise (RTI) VOCM INPUT CHARACTERISTICS Input Voltage Range Input Resistance Input Offset Voltage VOCM CMRR Gain Test Conditions/Comments V+DIN = V−DIN = 0 V ΔVOUT, dm/ΔVOCM, ΔVOCM = ±1 V ΔVOUT, cm/ΔVOCM, ΔVOCM = ±1 V General Performance Table 3. Parameter POWER SUPPLY Operating Range Quiescent Current per Amplifier Power Supply Rejection Ratio POWER-DOWN (PD) PD Input Voltage Turn-Off Time Turn-On Time PD Pin Bias Current per...

Open the catalog to page 4

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 5

Data Sheet 5 V OPERATION TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = 2.5 V, RF = 499 Ω, RG = 499 Ω, RT = 53.6 Ω (when used), RL, dm = 1 kΩ, unless otherwise noted. All specifications refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 55 for signal definitions. ±DIN to VOUT, dm Performance Table 4. Parameter DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Bandwidth for 0.1 dB Flatness Slew Rate Settling Time to 0.1% Overdrive Recovery Time NOISE/HARMONIC PERFORMANCE Second Harmonic Third Harmonic IMD Voltage Noise (RTI)...

Open the catalog to page 5

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 6

Data Sheet VOCM to VOUT, cm Performance Table 5. Parameter VOCM DYNAMIC PERFORMANCE −3 dB Small Signal Bandwidth −3 dB Large Signal Bandwidth Slew Rate Input Voltage Noise (RTI) VOCM INPUT CHARACTERISTICS Input Voltage Range Input Resistance Input Offset Voltage VOCM CMRR Gain Test Conditions/Comments V+DIN = V−DIN = 2.5 V ΔVOUT, dm/ΔVOCM, ΔVOCM = ±1 V ΔVOUT, cm/ΔVOCM, ΔVOCM = ±1 V General Performance Table 6. Parameter POWER SUPPLY Operating Range Quiescent Current per Amplifier Power Supply Rejection Ratio POWER-DOWN (PD) PD Input Voltage Turn-Off Time Turn-On Time PD Pin Bias Current per...

Open the catalog to page 6

ADA4932-1/ADA4932-2: Low Power Differential ADC Driver Data Sheet - 7

Data Sheet ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Power Dissipation Input Current, +IN, −IN, PD Storage Temperature Range Operating Temperature Range ADA4932-1 ADA4932-2 Lead Temperature (Soldering, 10 sec) Junction Temperature Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may...

Open the catalog to page 7