Complete 12-Bit 1.5/3.0/10.0 MSPS Monolithic A/D Converters AD9221/AD9223/AD9220 FEATURES FUNCTIONAL BLOCK DIAGRAM Monolithic 12-Bit A/D Converter Product Family CLK AVDD DVDD Family Members Are: AD9221, AD9223, and AD9220 Flexible Sampling Rates: 1.5 MSPS, 3.0 MSPS, and SHA VINA MDAC1 MDAC2 MDAC3 10.0 MSPS GAIN = 16 GAIN = 8 GAIN = 4 VINB Low Power Dissipation: 59 mW, 100 mW, and 250 mW 5 4 3 A/D A/D A/D A/D Single 5 V Supply CAPT 5 4 3 3 Integral Nonlinearity Error: 0.5 LSB CAPB DIGITAL CORRECTION LOGIC Differential Nonlinearity Error: 0.3 LSB 12 VREF Input Referred Noise: 0.09 LSB OUTPUT BUFFERS OTR Complete On-Chip Sample-and-Hold Amplifier and SENSE BIT 1 (MSB) 1V MODE Voltage Reference SELECT BIT 12 AD9221/AD9223/AD9220 Signal-to-Noise and Distortion Ratio: 70 dB (LSB) Spurious-Free Dynamic Range: 86 dB REFCOM AVSS DVSS CML Out-of-Range Indicator amplifier (SHA) is equally suited for both multiplexed sys- Straight Binary Output Data tems that switch full-scale voltage levels in successive channels 28-Lead SOIC and 28-Lead SSOP as well as sampling single-channel inputs at frequencies up to GENERAL DESCRIPTION and beyond the Nyquist rate. Also, the AD9221/AD9223/AD9220 The AD9221, AD9223, and AD9220 are a generation of high is well suited for communication systems employing Direct- performance, single supply 12-bit analog-to-digital converters. IF down conversion since the SHA in the differential input Each device exhibits true 12-bit linearity and temperature drift mode can achieve excellent dynamic performance far beyond its 1 2 2 performance as well as 11.5-bit or better ac performance. The specified Nyquist frequency. AD9221/AD9223/AD9220 share the same interface options, A single clock input is used to control all internal conversion package, and pinout. Thus, the product family provides an upward cycles. The digital output data is presented in straight binary or downward component selection path based on performance, output format. An out-of-range (OTR) signal indicates an over- sample rate and power. The devices differ with respect to their flow condition that can be used with the most significant bit to specified sampling rate, and power consumption, which is reflected determine low or high overflow. in their dynamic performance over frequency. The AD9221/AD9223/AD9220 combine a low cost, high speed PRODUCT HIGHLIGHTS CMOS process and a novel architecture to achieve the resolution The AD9221/AD9223/AD9220 family offers a complete single- and speed of existing hybrid and monolithic implementations at chip sampling 12-bit, analog-to-digital conversion function in a fraction of the power consumption and cost. Each device is a pin compatible 28-lead SOIC and SSOP packages. complete, monolithic ADC with an on-chip, high performance, Flexible Sampling RatesThe AD9221, AD9223, and AD9220 low noise sample-and-hold amplifier and programmable voltage offer sampling rates of 1.5 MSPS, 3.0 MSPS, and 10.0 MSPS, reference. An external reference can also be chosen to suit the respectively. dc accuracy and temperature drift requirements of the application. Low Power and Single SupplyThe AD9221, AD9223, and The devices use a multistage differential pipelined architecture AD9220 consume only 59 mW, 100 mW, and 250 mW, respec- with digital output error correction logic to provide 12-bit accu- tively, on a single 5 V power supply. racy at the specified data rates and to guarantee no missing codes over the full operating temperature range. Excellent DC Performance Over TemperatureThe AD9221/ AD9223/AD9220 provide 12-bit linearity and temperature drift The input of the AD9221/AD9223/AD9220 is highly flexible, 1 performance. allowing for easy interfacing to imaging, communications, medi- cal, and data-acquisition systems. A truly differential input Excellent AC Performance and Low NoiseThe AD9221/ structure allows for both single-ended and differential input AD9223/AD9220 provide better than 11.3 ENOB performance 2 interfaces of varying input spans. The sample-and-hold and have an input referred noise of 0.09 LSB rms. Flexible Analog Input RangeThe versatile on-board sample- NOTES 1 Excluding internal voltage reference. and-hold (SHA) can be configured for either single-ended or 2 Depends on the analog input configuration. differential inputs of varying input spans. REV. E 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. may result from its use. No license is granted by implication or otherwise Tel: 781/329-4700 www.analog.com under any patent or patent rights of Analog Devices. Trademarks and Fax: 781/326-8703 2003 Analog Devices, Inc. All rights reserved. registered trademarks are the property of their respective companies.AD9221/AD9223/AD9220SPECIFICATIONS (AVDD = 5 V, DVDD = 5 V, f = Max Conversion Rate, V = 2.5 V, VINB = 2.5 V, T to T , unless SAMPLE REF MIN MAX DC SPECIFICATIONS otherwise noted.) Parameter AD9221 AD9223 AD9220 Unit RESOLUTION 12 12 12 Bits min MAX CONVERSION RATE 1.5 3 10 MHz min INPUT REFERRED NOISE (TYP) V = 1 V 0.23 0.23 0.23 LSB rms typ REF V = 2.5 V 0.09 0.09 0.09 LSB rms typ REF ACCURACY Integral Nonlinearity (INL) 0.4 0.5 0.5 LSB typ 1.25 1.25 1.25 LSB max Differential Nonlinearity (DNL) 0.3 0.3 0.3 LSB typ 0.75 0.75 0.75 LSB max 1 INL 0.6 0.6 0.7 LSB typ 1 DNL 0.3 0.3 0.35 LSB typ No Missing Codes 12 12 12 Bits Guaranteed Zero Error ( 25C) 0.3 0.3 0.3 % FSR max 2 Gain Error ( 25C) 1.5 1.5 1.5 % FSR max 3 Gain Error ( 25C) 0.75 0.75 0.75 % FSR max TEMPERATURE DRIFT Zero Error 2 2 2 ppm/C typ 2 Gain Error 26 26 26 ppm/C typ 3 Gain Error 0.4 0.4 0.4 ppm/C typ POWER SUPPLY REJECTION AVDD, DVDD (+5 V 0.25 V) 0.06 0.06 0.06 % FSR max ANALOG INPUT Input Span (with V = 1.0 V) 222V p-p min REF Input Span (with V = 2.5 V) 555V p-p max REF Input (VINA or VINB) Range 000V min AVDD AVDD AVDD V max Input Capacitance 16 16 16 pF typ INTERNAL VOLTAGE REFERENCE Output Voltage (1 V Mode) 111V typ Output Voltage Tolerance (1 V Mode) 14 14 14 mV max Output Voltage (2.5 V Mode) 2.5 2.5 2.5 V typ Output Voltage Tolerance (2.5 V Mode) 35 35 35 mV max 4 Load Regulation 2.0 2.0 2.0 mV max REFERENCE INPUT RESISTANCE 555k typ POWER SUPPLIES Supply Voltages AVDD 555V (5% AVDD Operating) DVDD 2.7 to 5.25 2.7 to 5.25 2.7 to 5.25 V Supply Current IAVDD 14.0 26 58 mA max 11.8 20 51 mA typ IDVDD 0.5 0.5 4.0 mA max 0.02 0.02 <1.0 mA typ POWER CONSUMPTION 59.0 100 254 mW typ 70.0 130 310 mW max NOTES 1 V = 1 V. REF 2 Including internal reference. 3 Excluding internal reference. 4 Load regulation with 1 mA load current (in addition to that required by the AD9221/AD9223/AD9220). Specification subject to change without notice. 2 REV. E