PDF AD9070 Data sheet ( Hoja de datos )

Número de pieza	AD9070
Descripción	10-Bit 100 MSPS A/D Converter
Fabricantes	Analog Devices
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No Preview Available ! a 10-Bit, 100 MSPS A/D Converter AD9070 FEATURES 10-Bit, 100 MSPS ADC Low Power: 600 mW Typical at 100 MSPS On-Chip Track/Hold 230 MHz Analog Bandwidth SINAD = 54 dB @ 41 MHz On-Chip Reference 1 V p-p Analog Input Range Single Supply Operation: +5 V or –5 V Differential Clock Input Available in Standard Military Drawing Version APPLICATIONS Digital Communications Signal Intelligence Digital Oscilloscopes Spectrum Analyzers Medical Imaging Radar HDTV GENERAL DESCRIPTION The AD9070 is a monolithic sampling analog-to-digital converter with an on-chip track-and-hold circuit and ECL digital interfaces. The product operates at a 100 MSPS conversion rate with outstanding dynamic performance over its full operating range. The ADC requires only a single –5 V supply and an encode clock for full performance operation. The digital outputs are ECL compatible, while a differential clock input accommodates a wide range of logic levels. The AD9070 may be operated in a Positive ECL (PECL) environment with a single +5 V supply. An Out-of-Range output (OR) is available in the DIP version to indicate that a conversion result is outside the operating range. In both package styles, the output data are held at saturation levels during an out-of-range condition. FUNCTIONAL BLOCK DIAGRAM AIN AIN ENCODE ENCODE AD9070 VREF VREF REF IN OUT COMP BYPASS –2.5V SOIC (BR) PACKAGE ONLY T/H SUM AMP TIMING ADC DAC ADC VEE GND 10 ENCODE LOGIC D9 – D0 OR DIP PACKAGE ONLY The input amplifier supports single-ended interfaces. An internal –2.5 V reference is included in the SOIC packaged device (an external voltage reference is required for the DIP version). Fabricated on an advanced bipolar process, the AD9070 is available in a plastic SOIC package specified over the industrial temperature range (–40°C to +85°C), and a full MIL-PRF-38534 QML version (–55°C to +125°C) in a ceramic Dual-in-Line Package (DIP). REV. C 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. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2001 1 page AD9070 PIN FUNCTION DESCRIPTIONS Pin Numbers AD9070BR AD9070DIP R Package D Package Mnemonic Function 1, 7, 12, 21, 23 2, 8, 11, 20, 22 3 4 5 6 9 10 13 14 28–24, 19–15 N/A 1, 7, 9, 14, 21 2, 6, 8, 10, 13, 15, 22 N/A 3 N/A N/A 4 5 11 12 27–23, 20–16 28 VEE GND VREF OUT VREF IN COMP REF BYPASS AIN AIN ENCODE ENCODE D9–D0 OR Negative Power Supply. Nominally –5.0 V. Ground Internal Reference Output (–2.5 V typical); Bypass with 0.1 µF to Ground Reference Input for ADC (–2.5 V typical) Internal Amplifier Compensation, 0.1 µF to VEE Reference Bypass Node, 0.1 µF to VEE Analog Input – Complement Analog Input – True Encode Clock for ADC (ADC Samples on Rising Edge of ENCODE). Encode Clock Complement (ADC Samples on Falling Edge of ENCODE). Digital Outputs of ADC. D9 is the MSB. Data is two’s complement. Out-of-Range Output. Goes HIGH when the converted sample is more positive than 1FFh or more negative than 200h (Two’s Complement Coding). SOIC PIN CONFIGURATIONS Ceramic DIP VEE 1 GND 2 28 D9 (MSB) 27 D8 VREF OUT 3 26 D7 VREF IN 4 25 D6 COMP 5 24 D5 REF BYPASS 6 AD9070BR 23 VEE VEE 7 TOP VIEW 22 GND (Not to Scale) GND 8 21 VEE AIN 9 20 GND AIN 10 19 D4 GND 11 18 D3 VEE 12 ENCODE 13 ENCODE 14 17 D2 16 D1 15 D0 (LSB) VEE 1 GND 2 28 OR 27 D9 (MSB) VREF IN 3 AIN 4 26 D8 25 D7 AIN 5 24 D6 GND 6 AD9070DIP 23 D5 VEE 7 TOP VIEW 22 GND (Not to Scale) GND 8 21 VEE VEE 9 20 D4 GND 10 19 D3 ENCODE 11 ENCODE 12 18 D2 17 D1 GND 13 16 D0 (LSB) VEE 14 15 GND REV. C –5– 5 Page AD9070 5 V Operation The AD9070 may be operated above ground, with a single 5 V power supply. All power supply ground pins are connected to 5 V, and VEE pins are connected to ground (Figure 12). Care must be taken in connecting signals and determining bypass rails. The reference voltage (REF OUT) is still generated with respect to the positive rail, which is now 5 V. It is nominally 2.5 V, but its voltage with respect to ground will vary directly with changes in the power supply voltage (for example, if the power supply goes to 5.1 V, the reference becomes 2.6 V). The reference input is likewise processed with respect to 5 V. This dictates that these pins be bypassed to 5 V as well. However, the COMP and REF BYPASS pins must continue to be bypassed to the most negative supply, which is now ground. The AIN input must still be connected or bypassed to the ground reference of the input signal. Package Options The AD9070 is available in two packages. The BR package is a standard 28-lead Small Outline IC (SOIC). The DIP package is a ceramic Dual-in-Line Hybrid. The SOIC is offered in a commer- cial grade, and specified over the industrial (–40°C to +85°C) temperature range. The DIP is a full MIL-PRF-38534 QML version that operates from (–55°C to +125°C). The SOIC version includes the on-chip voltage reference, whereas the DIP does not. The DIP, however, provides the Overrange (OR) output, and includes reference and power supply bypass- ing, along with an internal compensation capacitor. Equivalent performance may be obtained with either part though, due to the internal bypassing, the DIP is not as sensitive to board layout and parasitics. 5V VIN 1Vp-p 0.1␮F RT 500⍀ 0.1␮F 10␮H 0.1␮F GND AIN AD9070 AIN (MSB) D9 VREF OUT VREF IN D9 510⍀ (OR 100⍀ TO +3V) ENCODE ENCODE 5V (LSB) D0 ENCODE ENCODE REF COMP VEE BYPASS D0 510⍀ (OR 100⍀ TO +3V) 0.1␮F 0.1␮F Figure 12. AD9070 in 5 V (PECL) Environment REV. C –11– 11 Page

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