AD9057

a 8-Bit 40 MSPS/50 MSPS/80 MSPS Converter AD9057 FUNCTIONAL BLOCK DIAGRAM VD PWRDN VDD FEATURES 8-Bit, Low Power ADC: 200 mW Typical 120 MHz Analog Bandwidth On-Chip 2.5 V Reference and T/H 1 V p-p Analog Input Range Single 5 V Supply Operation 5 V or 3 V Logic Interface Power-Down Mode: < 10 mW Three Performance Grades (40 MSPS, 60 MSPS, 80 MSPS) APPLICATIONS Digital Communications (QAM Demodulators) RGB and YC/Composite Video Processing Digital Data Storage Read Channels Medical Imaging Digital Instrumentation AD9057 AIN BIAS OUT VREF IN T/H 1k ADC 8 D7–D0 VREF OUT +2.5V GND ENCODE PRODUCT DESCRIPTION The AD9057 is an 8-bit monolithic analog-to-digital converter optimized for low cost, low power, small size, and ease of use. With a 40 MSPS, 60 MSPS, or 80 MSPS encode rates capability and full-power analog bandwidth of 120 MHz, the component is ideal for applications requiring excellent dynamic performance. To minimize system cost and power dissipation, the AD9057 includes an internal 2.5 V reference and a track-and-hold circuit. The user must provide only a 5 V power supply and an encode clock. No external reference or driver components are required for many applications. The AD9057’s encode input is TTL/CMOS compatible and the 8-bit digital outputs can be operated from 5 V or 3 V supplies. A power-down function may be exercised to bring total consumption to < 10 mW. In power-down mode the digital outputs are driven to a high impedance state. Fabricated on an advanced BiCMOS process, the AD9057 is available in a space saving 20-lead surface mount plastic package (20 SSOP) and is specified over the industrial (–40°C to +85°C) temperature range. Customers desiring multichannel digitization may consider the AD9059, a dual 8-bit, 60 MSPS monolithic based on the AD9057 ADC core. The AD9059 is available in a 28-lead surface mount plastic package (28 SSOP) and is specified over the industrial temperature range. PIN CONFIGURATION PWRDN 1 VREF OUT 2 VREF IN 3 GND 4 VD 5 20 D0 (LSB) 19 D1 18 D2 AD9057 17 D3 TOP VIEW 16 GND (Not to Scale) BIAS OUT 6 15 VDD AIN 7 VD 8 GND 9 ENCODE 10 14 D4 13 D5 12 D6 11 D7 (MSB) R EV. 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 AD9057–SPECIFICATIONS (V = 5 V, V D DD = 3 V; external reference, unless otherwise noted.) AD9057BRS-60 Min Typ Max 8 1.9 2.0 0.75 1.9 2.0 GUARANTEED –6 –2.5 +6 –8 +8 ± 70 0.75 AD9057BRS-80 Min Typ Max 8 1.9 2.0 0.75 1.9 2.0 GUARANTEED –6 –2.5 +6 –8 +8 ± 70 0.75 Unit Bits LSB LSB LSB LSB % FS % FS ppm/°C Parameter RESOLUTION DC ACCURACY Differential Nonlinearity Integral Nonlinearity No Missing Codes Gain Error1 Gain Tempco1 ANALOG INPUT Input Voltage Range (Centered at 2.5 V) Input Offset Voltage Input Resistance Input Capacitance Input Bias Current Analog Bandwidth BANDGAP REFERENCE Output Voltage Temperature Coefficient SWITCHING PERFORMANCE Maximum Conversion Rate Minimum Conversion Rate Aperture Delay (tA) Aperture Uncertainty (Jitter) Output Valid Time (tV)2 Output Propagation Delay (tPD)2 DYNAMIC PERFORMANCE3 Transient Response Overvoltage Recovery Time Signal-to-Noise Ratio (SINAD) (With Harmonics) fIN = 10.3 MHz fIN = 76 MHz Effective Number of Bits fIN = 10.3 MHz fIN = 76 MHz Signal-to-Noise Ratio (SNR) (Without Harmonics) fIN = 10.3 MHz fIN = 76 MHz 2nd Harmonic Distortion fIN = 10.3 MHz fIN = 76 MHz 3rd Harmonic Distortion fIN = 10.3 MHz fIN = 76 MHz Two Tone Intermodulation Distortion (IMD) Differential Phase Differential Gain DIGITAL INPUTS Logic “1” Voltage Logic “0” Voltage Logic “1” Current Logic “0” Current Input Capacitance Encode Pulsewidth High (tEH) Encode Pulsewidth Low (tEL) Temp Test Level AD9057BRS-40 Min Typ Max 8 25°C Full 25°C Full Full 25°C Full Full I VI I VI VI I VI V 1.9 2.0 0.75 1.9 2.0 GUARANTEED –6 –2.5 +6 –8 +8 ± 70 0.75 25°C 25°C Full 25°C 25°C 25°C Full 25°C Full Full Full Full 25°C 25°C Full Full 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C 25°C Full Full Full Full 25°C 25°C 25°C V I VI V V I VI V VI V VI IV V V IV IV V V –15 –25 1.0 ±0 150 2 6 120 +15 +25 –15 –25 1.0 ±0 150 2 6 120 +15 +25 –15 –25 1.0 ±0 150 2 6 120 +15 +25 16 25 16 25 16 25 V p-p mV mV kΩ pF µA µA MHz V ppm/°C MSPS MSPS ns ps, rms ns ns ns ns 2.4 2.5 ± 10 2.6 2.4 2.5 ± 10 2.6 2.4 2.5 ± 10 2.6 40 5 2.7 5 6.6 11.5 9 9 60 5 2.7 5 6.6 9.5 9 9 80 5 2.7 5 6.6 8.0 9 9 4.0 4.0 18.0 4.0 14.2 11.3 I V I V 42 45.5 44.0 7.2 7.0 42 45 43.5 7.2 6.9 41.5 45 43.5 7.2 6.9 dB dB Bits Bits 6.7 6.7 6.6 I V I V I V V V V VI VI VI VI V IV IV 43 46.5 45.5 –62 –54 –60 –54 –52 0.8 1.0 43 46 45 –62 –54 –60 –54 –52 0.8 1.0 42.5 46 45 –62 –54 –60 –54 –52 0.8 1.0 dB dB dBc dBc dBc dBc dBc Degrees % V V µA µA pF ns ns –50 –50 –50 –46 –46 –46 2.0 0.8 ±1 ±1 4.5 9.0 9.0 166 166 2.0 0.8 ±1 ±1 4.5 6.7 6.7 166 166 2.0 0.8 ±1 ±1 4.5 5.5 5.5 166 166 –2– REV. C AD9057 Parameter Temp Test Level AD9057BRS-40 Min Typ Max AD9057BRS-60 Min Typ Max AD9057BRS-80 Min Typ Max Unit DIGITAL OUTPUTS Logic “1” Voltage (VDD = 3 V) Logic “1” Voltage (VDD = 5 V) Logic “0” Voltage Output Coding POWER SUPPLY VD Supply Current (VD = 5 V) VDD Supply Current (VDD = 3 V)4 Power Dissipation5, 6 Power-Down Dissipation Power Supply Rejection Ratio (PSRR) Full Full Full VI IV VI 2.95 4.95 0.05 Offset Binary Code 36 4.0 192 6 48 6.5 260 10 15 2.95 4.95 0.05 Offset Binary Code 38 5.5 205 6 48 6.5 260 10 15 2.95 4.95 0.05 Offset Binary Code 40 7.4 220 6 51 8.8 281 10 15 V V V Full Full Full Full 25°C VI VI VI VI I mA mA mW mW mV/V NOTES 1 Gain error and gain temperature coefficient are based on the ADC only (with a fixed 2.5 V external reference). 2 tV and tPD are measured from the 1.5 V level of the ENCODE to the 10%/90% levels of the digital output 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 SNR/harmonics based on an analog input voltage of –0.5 dBFS referenced to a 1.0 V full-scale input range. 4 Digital supply current based on V DD = 3 V output drive with