AD9059

a FEATURES Dual 8-Bit ADCs on a Single Chip Low Power: 400 mW Typical On-Chip +2.5 V Reference and T/Hs 1 V p-p Analog Input Range Single +5 V Supply Operation +5 V or +3 V Logic Interface 120 MHz Analog Bandwidth Power-Down Mode: < 12 mW APPLICATIONS Digital Communications (QAM Demodulators) RGB & YC/Composite Video Processing Digital Data Storage Read Channels Medical Imaging Digital Instrumentation Dual 8-Bit, 60 MSPS A/D Converter AD9059 FUNCTIONAL BLOCK DIAGRAM VD PWRDN VDD AD9059 AINA T/H ADCA 8 D7A–D0A VREF ENCODE +2.5V AINB T/H ADCB 8 D7B–D0B GND PRODUCT DESCRIPTION The AD9059 is a dual 8-bit monolithic analog-to-digital converter optimized for low cost, low power, small size, and ease of use. With a 60 MSPS encode rate capability and full-power analog bandwidth of 120 MHz typical, the component is ideal for applications requiring multiple ADCs with excellent dynamic performance. To minimize system cost and power dissipation, the AD9059 includes an internal +2.5 V reference and dual track-and-hold circuits. The ADC requires only a +5 V power supply and an encode clock. No external reference or driver components are required for many applications. The AD9059’s single encode input is TTL/CMOS compatible and simultaneously controls both internal ADC channels. The parallel 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 < 12 mW when ADC data is not required for lengthy periods of time. In power-down mode the digital outputs are driven to a high impedance state. Fabricated on an advanced BiCMOS process, the AD9059 is available in a space saving 28-lead surface mount plastic package (28 SSOP) and is specified over the industrial (–40°C to +85°C) temperature range. Customers desiring single channel digitization may consider the AD9057, a single 8-bit, 60 MSPS monolithic based on the AD9059 ADC core. The AD9057 is available in a 20-lead surface mount plastic package (20 SSOP) and is specified over the industrial temperature range. PIN CONFIGURATION AINA 1 VREF 2 PWRDN 3 VD 4 GND 5 VDD 6 28 AINB 27 GND 26 ENCODE 25 VD AD9059 24 GND TOP VIEW 23 VDD D7A (MSB) 7 (Not to Scale) 22 D7B (MSB) D6A 8 D5A 9 D4A 10 D3A 11 D2A 12 D1A 13 D0A (LSB) 14 21 D6B 20 D5B 19 D4B 18 D3B 17 D2B 16 D1B 15 D0B (LSB) 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. © Analog Devices, Inc., 1996 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 AD9059–SPECIFICATIONS ELECTRICAL CHARACTERISTICS (V Parameter RESOLUTION DC ACCURACY Differential Nonlinearity Integral Nonlinearity No Missing Codes Gain Error1 Gain Tempco1 D = +5 V, VDD = +3 V; external reference; ENCODE = 60 MSPS unless otherwise noted) Temp Test Level Min AD9059BRS Typ Max 8 +25°C Full +25°C Full Full +25°C Full Full Units Bits LSB LSB LSB LSB % FS % FS ppm/°C I VI I VI VI I VI V –6 –8 2.0 2.5 0.75 2.0 2.5 GUARANTEED –2.5 +6 +8 ± 70 0.75 ANALOG INPUT Input Voltage Range (Centered at +2.5 V) Input Offset Voltage Input Resistance Input Capacitance Input Bias Current Analog Bandwidth CHANNEL MATCHING (A to B) Gain Delta Input Offset Voltage Delta 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 PERFORMANCE 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) Channel Crosstalk Rejection Differential Phase Differential Gain 3 +25°C +25°C Full +25°C +25°C +25°C +25°C +25°C +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 +25°C –2– V I VI V V I V V V VI V VI IV V V IV IV V V I V I V I V I V I V V V V V –15 –25 1.0 0 150 2 6 120 ±1 ±4 +15 +25 16 V p-p mV mV kΩ pF µA MHz % FS mV 2.4 2.5 ± 10 2.6 V ppm/°C MSPS MSPS ns ps, rms ns ns ns ns dB dB Bits Bits dB dB dBc dBc dBc dBc dBc dBc Degrees % REV. 0 60 5 2.7 5 6.6 9.5 9 9 40 44.5 43.5 7.1 6.9 46 45 –62 –54 –60 –54 –52 –50 0.8 1.0 4.0 14.2 6.35 42 –50 –46 AD9059 Parameter DIGITAL INPUTS Logic “1” Voltage Logic “0” Voltage Logic “1” Current Logic “0” Current Input Capacitance Encode Pulse Width High (tEH) Encode Pulse Width Low (tEL) DIGITAL OUTPUTS Logic “1” Voltage (VDD = +3 V) Logic “1” Voltage (VDD = +5 V) Logic “0” Voltage (VDD = +3 V or +5 V) 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) Temp Full Full Full Full +25°C +25°C +25°C Full Full Full Test Level VI VI VI VI V IV IV VI IV VI Min 2.0 AD9059BRS Typ Max Units V V µA µA pF ns ns V V V 0.8 ±1 ±1 4.5 6.7 6.7 2.95 4.95 0.05 Offset Binary Code 72 13 400 6 166 166 Full Full Full Full +25°C VI VI VI VI I 92 15 505 12 15 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