AD9288BST-80

a FEATURES Dual 8-Bit, 40 MSPS, 80 MSPS, and 100 MSPS ADC Low Power: 90 mW at 100 MSPS per Channel On-Chip Reference and Track/Holds 475 MHz Analog Bandwidth Each Channel SNR = 47 dB @ 41 MHz 1 V p-p Analog Input Range Each Channel Single +3.0 V Supply Operation (2.7 V–3.6 V) Standby Mode for Single Channel Operation Twos Complement or Offset Binary Output Mode Output Data Alignment Mode APPLICATIONS Battery Powered Instruments Hand-Held Scopemeters Low Cost Digital Oscilloscopes I and Q Communications ENCA AINA AINA REFINA REFOUT REFINB AINB AINB ENCB 8-Bit, 40/80/100 MSPS Dual A/D Converter AD9288 FUNCTIONAL BLOCK DIAGRAM VDD TIMING OUTPUT REGISTER AD9288 T/H ADC 8 8 D7A–D0A SELECT #1 SELECT #2 REF OUTPUT REGISTER DATA FORMAT SELECT 8 D7B–D0B T/H ADC 8 TIMING VD GND VDD GENERAL DESCRIPTION The AD9288 is a dual 8-bit monolithic sampling analog-todigital converter with on-chip track-and-hold circuits and is optimized for low cost, low power, small size and ease of use. The product operates at a 100 MSPS conversion rate with outstanding dynamic performance over its full operating range. Each channel can be operated independently. The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power supply and an encode clock for full-performance operation. No external reference or driver components are required for many applications. The digital outputs are TTL/CMOS compatible and a separate output power supply pin supports interfacing with 3.3 V or 2.5 V logic. The encode input is TTL/CMOS compatible and the 8-bit digital outputs can be operated from +3.0 V (2.5 V to 3.6 V) supplies. User-selectable options are available to offer a combination of standby modes, digital data formats and digital data timing schemes. In standby mode, the digital outputs are driven to a high impedance state. Fabricated on an advanced CMOS process, the AD9288 is available in a 48-lead surface mount plastic package (7 × 7 mm, 1.4 mm LQFP) specified over the industrial temperature range (–40°C to +85°C). R EV. 0 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 which 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 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 AD9288–SPECIFICATIONS (V Parameter RESOLUTION DC ACCURACY Differential Nonlinearity Integral Nonlinearity No Missing Codes Gain Error1 Gain Tempco1 Gain Matching Voltage Matching ANALOG INPUT Input Voltage Range (With Respect to AIN) Common-Mode Voltage Input Offset Voltage Reference Voltage Reference Tempco Input Resistance Input Capacitance Analog Bandwidth, Full Power SWITCHING PERFORMANCE Maximum Conversion Rate Minimum Conversion Rate Encode Pulsewidth High (tEH) Encode Pulsewidth Low (tEL) Aperture Delay (tA) Aperture Uncertainty (Jitter) Output Valid Time (tV)2 Output Propagation Delay (tPD)2 DIGITAL INPUTS Logic “1” Voltage Logic “0” Voltage Logic “1” Current Logic “0” Current Input Capacitance DIGITAL OUTPUTS Logic “1” Voltage Logic “0” Voltage 3 DD = 3.0 V; VD = 3.0 V, Differential Input; External reference unless otherwise noted.) AD9288BST-80 Min Typ Max 8 +1.25 +1.50 +1.25 +1.50 –6 –8 ± 0.5 ± 0.50 +1.25 +1.50 +1.25 +1.50 –6 –8 AD9288BST-40 Min Typ Max 8 ± 0.5 ± 0.50 +1.25 +1.50 +1.25 +1.50 Units Bits LSB LSB LSB LSB % FS % FS ppm/°C % FS mV Temp Test Level AD9288BST-100 Min Typ Max 8 +25°C Full +25°C Full Full +25°C Full Full +25°C +25°C I VI I VI VI I VI VI V V ± 0.5 ± 0.50 –6 –8 Guaranteed ± 2.5 +6 +8 80 ± 1.5 ± 15 Guaranteed ± 2.5 +6 +8 80 ± 1.5 ± 15 Guaranteed ± 2.5 +6 +8 80 ± 1.5 ± 15 Full Full +25°C Full Full Full +25°C Full +25°C +25°C Full +25°C +25°C +25°C +25°C +25°C Full Full Full Full Full Full +25°C Full Full Full Full +25°C +25°C +25°C +25°C +25°C +25°C V V I VI VI VI I VI V V VI IV IV IV V V VI VI VI VI VI VI V VI VI VI VI I V V –35 1.2 7 5 ± 512 ± 200 ± 10 ± 40 1.25 ± 130 10 2 475 +35 1.3 13 16 –35 1.2 7 5 ± 512 ± 200 ± 10 ± 40 1.25 ± 130 10 2 475 +35 1.3 13 16 –35 1.2 7 5 ± 512 ± 200 ± 10 ± 40 1.25 ± 130 10 2 475 +35 1.3 13 16 mV p-p mV mV mV V ppm/°C kΩ kΩ pF MHz MSPS MSPS ns ns ns ps rms ns ns V V µA µA pF V V mW mW mV/V ns ns 100 4.3 4.3 0 5 3.0 4.5 2.0 0.8 ±1 ±1 2.0 2.45 0.05 180 6 8 2 2 218 11 20 1 1000 1000 80 5.0 5.0 0 5 3.0 4.5 2.0 0.8 ±1 ±1 2.0 2.45 0.05 171 6 8 2 2 207 11 20 1 1000 1000 40 8.0 8.0 0 5 3.0 4.5 2.0 0.8 ±1 ±1 2.0 2.45 0.05 156 6 8 2 2 189 11 20 1 1000 1000 POWER SUPPLY Power Dissipation4 Standby Dissipation4, 5 Power Supply Rejection Ratio (PSRR) DYNAMIC PERFORMANCE Transient Response Overvoltage Recovery Time Signal-to-Noise Ratio (SNR) (Without Harmonics) fIN = 10.3 MHz fIN = 26 MHz fIN = 41 MHz 6 I I I 44 47.5 47.5 47.0 44 47.5 47 44 47.5 dB dB dB –2– REV. 0 AD9288 Parameter 6 Temp Test Level AD9288BST-100 Min Typ Max AD9288BST-80 Min Typ Max AD9288BST-40 Min Typ Max Units DYNAMIC PERFORMANCE (Continued) Signal-to-Noise Ratio (SINAD) (With Harmonics) fIN = 10.3 MHz +25°C I fIN = 26 MHz +25°C I fIN = 41 MHz +25°C I Effective Number of Bits fIN = 10.3 MHz +25°C I fIN = 26 MHz +25°C I +25°C I fIN = 41 MHz 2nd Harmonic Distortion +25°C I fIN = 10.3 MHz fIN = 26 MHz +25°C I +25°C I fIN = 41 MHz 3rd Harmonic Distortion +25°C I fIN = 10.3 MHz fIN = 26 MHz +25°C I +25°C I fIN = 41 MHz Two-Tone Intermod Distortion (IMD) fIN = 10.3 MHz +25°C V 44 47 47 47 7.5 7.5 7.5 70 70 70 60 60 60 60 44 47 47 47 7.5 7.5 7.5 70 70 70 60 60 60 60 44 47 dB dB dB Bits Bits Bits dBc dBc dBc dBc dBc dBc dBc 7.0 7.5 7.0 7.0 55 70 55 55 55 60 55 52 60 NOTES 1 Gain error and gain temperature coefficient are based on the ADC only (with a fixed 1.25 V external reference). 2 tV and t PD are measured from the 1.5 V level of the ENCODE input to the 10%/90% levels of the digital outputs swing. The digital output load during test is not to exceed an ac load of 10 pF or a dc current of ± 40 µA. 3 Digital supply current based on V DD = +3.0 V output drive with