Datasheet ADA4922-1 (Analog Devices)

High Voltage, Differential 18-Bit ADC Driver Data Sheet ADA4922-1 FEATURES FUNCTIONAL BLOCK DIAGRAM Single-ended-to-differential conversion ADA4922-1 Low distortion (V TOP VIEW O, dm = 40 V p-p) −99 dBc HD at 100 kHz NIC 1 8 IN Low differential output referred noise: 12 nV/√Hz REF 2 7 DIS High input impedance: 11 MΩ V 3 6 V Fixed gain of 2 S+ S– No external gain components required OUT+ 4 5 OUT– Low output-referred offset voltage: 1.1 mV maximum NOTES
001
Low input bias current: 3.5 μA maximum 1. EXPOSED PAD MUST BE CONNECTED TO GND.
681-
2. NIC = NO INTERAL CONNECTION.
05
Wide supply range
Figure 1.
5 V to 26 V Can produce differential output signals in excess of 40 V p-p High speed 38 MHz, −3 dB bandwidth at 0.2 V p-p differential output Fast settling time 200 ns to 0.01% for 12 V step on ±5 V supplies Disable feature Available in space-saving, thermally enhanced packages 8-lead, 3 mm × 3 mm LFCSP
The ADA4922-1 is manufactured on Analog Devices, Inc.,
8-lead SOIC
proprietary, second-generation XFCB process that enables the
Low supply current: IS = 10 mA on ±12 V supplies
amplifier to achieve excellent noise and distortion performance on high supply voltages.
APPLICATIONS
The ADA4922-1 is available in an 8-lead 3 mm × 3 mm LFCSP
High voltage data acquisition systems
as well as an 8-lead SOIC package. Both packages are equipped
Industrial instrumentation
with an exposed paddle for more efficient heat transfer. The
Spectrum analysis
ADA4922-1 is rated to work over the extended industrial
ATE
temperature range, −40°C to +85°C.
Medical instruments –84 R SECOND HARMONIC GENERAL DESCRIPTION L = 2k –87 THIRD HARMONIC –90
The ADA4922-1 is a differential driver for 16-bit to 18-bit
–93
analog-to-digital converters (ADCs) that have differential input
–96 Bc) VS =

5V, VO, dm = 12V p-p
ranges up to ±20 V. Configured as an easy-to-use, single-ended-
d –99
to-differential amplifier, the ADA4922-1 requires no external
–102
components to drive ADCs. The ADA4922-1 provides essential
–105
benefits such as low distortion and high SNR that are required
DISTORTION ( –108
for driving ADCs with resolutions up to 18 bits.
–111 –114
With a wide supply voltage range (5 V to 26 V), high input
–117 V
impedance, and fixed differential gain of 2, the ADA4922-1 is
S =

12V, VO, dm = 40V p-p –120
05681-012 designed to drive ADCs found to in a variety of applications,
1 10 100
including industrial instrumentation.
FREQUENCY (kHz)
Figure 2. Harmonic Distortion for Various Power Supplies
Rev. A 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2005–2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION APPLICATIONS INFORMATION ADA4922-1 DIFFERENTIAL OUTPUT NOISE MODEL USING THE REF PIN INTERNAL FEEDBACK NETWORK POWER DISSIPATION DISABLE FEATURE DRIVING A DIFFERENTIAL INPUT ADC PRINTED CIRCUIT BOARD LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE