Datasheet AD8138-EP (Analog Devices)

Low Distortion Differential ADC Driver AD8138-EP FEATURES PIN CONFIGURATION Adjustable output common-mode voltage AD8138-EP Low harmonic distortion –IN 1 8 +IN −94 dBc SFDR @ 5 MHz VOCM 2 7 NC −85 dBc SFDR @ 20 MHz V+ 3 6 V– −3 dB bandwidth of 320 MHz, G = +1 +OUT 4 5 –OUT
01 0 7-
Fast settling to 0.01% of 16 ns NC = NO CONNECT
99 08
Fast overdrive recovery of 4 ns
Figure 1.
Low input voltage noise of 5 nV/√Hz Low power 90 mW on 5 V TYPICAL APPLICATION CIRCUIT ENHANCED PRODUCT FEATURES 5V 5V Supports defense and aerospace applications (AQEC) 499Ω Extended temperature range −55ºC to +105°C 499Ω Controlled manufacturing baseline V AVDD DVDD IN + AIN VOCM DIGITAL One assembly/test site AD8138-EP ADC OUTPUTS 499Ω AIN – One fabrication site AVSS VREF Enhanced product change notification
2
499Ω
-00 7
Qualification data available on request
99 08 Figure 2.
APPLICATIONS ADC drivers Single-ended-to-differential converters
The AD8138-EP’s differential output helps balance the input to
IF and baseband gain blocks
the differential ADCs, maximizing the performance of the ADC.
Differential buffers
The AD8138-EP eliminates the need for a transformer with
Line drivers
high performance ADCs, preserving the low frequency and dc information. The common-mode level of the differential output
GENERAL DESCRIPTION
is adjustable by a voltage on the VOCM pin, easily level-shifting The AD8138-EP is a major advancement over op amps for the input signals for driving single-supply ADCs. Fast overload differential signal processing. The AD8138-EP can be used recovery preserves sampling accuracy. as a single-ended-to-differential amplifier or as a differential-to- The AD8138-EP distortion performance makes it an ideal ADC differential amplifier. The AD8138-EP is as easy to use as an op driver for communication systems, with distortion performance amp and greatly simplifies differential signal amplification and good enough to drive state-of-the-art 10-bit to 16-bit converters driving. Manufactured on Analog Devices, Inc., proprietary XFCB at high frequencies. The AD8138-EP’s high bandwidth and IP3 also bipolar process, the AD8138-EP has a −3 dB bandwidth of 320 MHz make it appropriate for use as a gain block in IF and baseband and delivers a differential signal with the lowest harmonic distortion signal chains. The AD8138-EP offset and dynamic performance available in a differential amplifier. The AD8138-EP has a unique make it well suited for a wide variety of signal processing and internal feedback feature that provides balanced output gain and data acquisition applications. The AD8138-EP is available in the phase matching, suppressing even order harmonics. The internal MSOP package for operation over −55°C to +105°C temperatures. feedback circuit also minimizes any gain error that would be associated with the mismatches in the external gain setting resistors. Full details about this enhanced product are available in the AD8138 data sheet, which should be consulted in conjunction with this data sheet.
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Document Outline FEATURES ENHANCED PRODUCT FEATURES APPLICATIONS GENERAL DESCRIPTION PIN CONFIGURATION TYPICAL APPLICATION CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ±DIN TO ±OUT SPECIFICATIONS VOCM TO ±OUT SPECIFICATIONS ±DIN TO ±OUT SPECIFICATIONS VOCM TO ±OUT SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE MAXIMUM POWER DISSIPATION ESD CAUTION MAXIMUM OUTPUT VOLTAGE SWING PIN CONFIGURATION AND FUNCTION DESCRIPTIONS OUTLINE DIMENSIONS ORDERING GUIDE