|Category||Multimedia => Video => A/D Converters|
|Description||10-bit 40 MSPS A/D Converter|
|Datasheet||Download AD9040APCB datasheet
FEATURES Low Power: 53 dB SNR @ 10 MHz AIN On-Chip T/H, Reference CMOS-Compatible 2 V p-p Analog Input Fully Characterized Dynamic Performance APPLICATIONS Ultrasound Medical Imaging Digital Oscilloscopes Professional Video Digital Communications Advanced Television (MUSE Decoders) Instrumentation
The is a complete 10-bit monolithic sampling analogto-digital converter (ADC) with on-board track-and-hold and reference. The unit is designed for low cost, high performance applications and requires only an encode signal to achieve 40 MSPS sample rates with 10-bit resolution. Digital inputs and outputs are CMOS compatible; the analog input requires a signal 2 V p-p amplitude. The two-step architecture used in the AD9040A is optimized to provide the best dynamic performance available while maintaining low power requirements of only 940 mW typically; maximum dissipation is 1.1 watt at 40 MSPS. The signal-to-noise ratio (SNR), including harmonics, is 53 dB, or 8.5 ENOB, when sampling an analog input of 10.3 MHz at 40 MSPS. Competitive devices perform at less than 7.5 ENOB and require external references and larger input signals. The AD9040A A/D converter is available as either a 28-lead plastic DIP a 28-lead SOIC. The two models operate over a commercial temperature range to +70°C. Contact the factory regarding availability of ceramic military temperature range devices.
1. CMOS compatible logic for direct interface to ASICs. 2. On-board T/H provides excellent high frequency performance on analog inputs, critical for communications and medical imaging applications. 3. High input impedance and 2 volt p-p input range reduce need for external amplifiers. 4. Easy to use; no cumbersome external voltage references required, allowing denser packing of ADCs for multichannel applications. 5. Available in 28-lead plastic DIP and SOIC packages. 6. Evaluation board includes AD9040AJR, reconstruction DAC, and latches. Space is available near the analog input and digital outputs of the converter for additional circuits. Order as part number AD9040A/PCB (schematic shown in data sheet).
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
Parameter (Conditions) RESOLUTION DC ACCURACY Differential Nonlinearity Integral Nonlinearity No Missing Codes Gain Error Gain Tempco1 ANALOG INPUT Input Voltage Range Input Offset Voltage Input Bias Current Input Resistance Input Capacitance Analog Bandwidth BANDGAP REFERENCE Output Voltage Temperature Coefficient1 SWITCHING PERFORMANCE Maximum Conversion Rate Minimum Conversion Rate Aperture Delay (tA) Aperture Uncertainty (Jitter) Output Propagation Delay (tPD)2 DYNAMIC PERFORMANCE Transient Response Overvoltage Recovery Time Signal-to-Noise Ratio3 fIN = 2.3 MHz fIN = 10.3 MHz Signal-to-Noise Ratio3 (Without Harmonics) fIN = 2.3 MHz fIN = 10.3 MHz Signal-to-Noise Ratio3, 4 fIN = 2.3 MHz fIN = 10.3 MHz Signal-to-Noise Ratio3, 4 (Without Harmonics) fIN = 2.3 MHz fIN = 10.3 MHz 2nd Harmonic Distortion fIN = 2.3 MHz fIN = 10.3 MHz 3rd Harmonic Distortion fIN = 2.3 MHz fIN = 10.3 MHz Two-Tone Intermodulation Distortion Rejections Differential Phase Differential Gain +25°C Full +25°C Full +25°C Full +25°C Full +25°C Full +25°C Full +25°C Full 51 50
Test Level Min AD9040AJN/JR Typ 10 1.0 Guaranteed Max Units Bits LSB % FS ppm/°C V p-p k pF MHz V ppm/°C MSPS ns ps, rms ns dB
Parameter (Conditions) ENCODE INPUT Logic "1" Voltage Logic "0" Voltage Logic "1" Current Logic "0" Current Input Capacitance Encode Pulsewidth (High) (tEH)6 Encode Pulsewidth (Low) (tEL)6 DIGITAL OUTPUTS Logic "1" Voltage Logic "0" Voltage Output Coding POWER SUPPLY VD Supply Current +VS Supply Current VS Supply Current Power Dissipation Power Supply Rejection Ratio (PSRR)7 Temp Full +25°C Full Test Level IV VI Min Offset Binary Full VI I
NOTES 1 "Gain Tempco" is for converter using internal reference; "Temperature Coefficient" is for bandgap reference only. 2 Output propagation delay (t PD) is measured from the 50% point of the falling edge of the encode command to the min/max voltage levels of the digital outputs with 10 pF maximum loads. 3 RMS signal to rms noise with analog input signal 1 dB below full scale at specified frequency. 4 ENCODE = 32 MSPS. 5 3rd order intermodulation measured with analog input frequencies of 2.3 MHz and 2.4 MHz 7 dB below full scale. 6 For rated performance at 40 MSPS, duty cycle of encode command should be Measured as the ratio of the change in offset voltage for a 5% change S or VS. Specifications subject to change without notice.
± VS. 7 V VD. +7 V ANALOG IN. VS to +VS DIGITAL INPUTS. V to +VS VREF Input. V to +VS Digital Output Current. 20 mA Operating Temperature to +70°C Storage Temperature. to +150°C Maximum Junction Temperature2 (JN/JR Suffixes). +150°C Lead Soldering Temp (10 sec). +300°C
NOTES 1 Absolute maximum ratings are limiting values to be applied individually, and beyond which the serviceability of the circuit may be impaired. Functional operability is not necessarily implied. Exposure to absolute maximum rating conditions for an extended period of time may affect device reliability. 2 Typical thermal impedances (parts soldered to board): N Package (Plastic DIP): 10°C/W. R Package (SOIC): = 10°C/W.
100% Production Tested. 100% production tested at +25°C, and sample tested at specified temperatures. AC testing done on sample basis. III Sample Tested Only. IV Parameter is guaranteed by design and characterization testing. V Parameter is a typical value only. VI All devices are 100% production tested +25°C. 100% production tested at temperature extremes for military temperature devices; guaranteed by design and characterization testing for industrial devices.
+70°C 28-Lead Plastic DIP +70°C 28-Lead SOIC Package Printed Circuit Board (Only) of Evaluation Circuit Complete Evaluation Board, Assembled and Tested, Including AD9040AJR 3
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