Datasheet AD9241 (Analog Devices)

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Complete 14-Bit, 1.25 MSPS Monolithic A/D Converter AD9241 FEATURES FUNCTIONAL BLOCK DIAGRAM Monolithic 14-Bit, 1.25 MSPS A/D Converter Low Power Dissipation: 60 mW CLK AVDD DVDD DRVDD Single +5 V Supply SHA Integral Nonlinearity Error: 2.5 LSB VINA MDAC1 MDAC2 MDAC3 Differential Nonlinearity Error: 0.6 LSB VINB GAIN = 16 GAIN = 8 GAIN = 8 Input Referred Noise: 0.36 LSB 5 4 4 CML A/D A/D A/D A/D Complete: On-Chip Sample-and-Hold Amplifier and CAPT 5 4 4 4 Voltage Reference CAPB DIGITAL CORRECTION LOGIC Signal-to-Noise and Distortion Ratio: 78.0 dB 14 VREF OUTPUT BUFFERS OTR Spurious-Free Dynamic Range: 88.0 dB SENSE BIT 1 Out-of-Range Indicator (MSB) 1V MODE Straight Binary Output Data SELECT AD9241 BIT 14 (LSB) 44-Pin MQFP REFCOM AVSS DVSS DRVSS PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS
The AD9241 is a 1.25 MSPS, single supply, 14-bit analog-to- The AD9241 offers a complete single-chip sampling 14-bit, digital converter (ADC). It combines a low cost, high speed analog-to-digital conversion function in a 44-pin Metric Quad CMOS process and a novel architecture to achieve the resolution Flatpack. and speed of existing hybrid implementations at a fraction of the
Low Power and Single Supply
power consumption and cost. It is a complete, monolithic ADC The AD9241 consumes only 60 mW on a single +5 V power with an on-chip, high performance, low noise sample-and-hold supply. amplifier and programmable voltage reference. An external refer-
Excellent DC Performance Over Temperature
ence can also be chosen to suit the dc accuracy and temperature The AD9241 provides no missing codes, and excellent tempera- drift requirements of the application. The device uses a multistage ture drift performance over the full operating temperature range. differential pipelined architecture with digital output error correc- tion logic to guarantee no missing codes over the full operating
Excellent AC Performance and Low Noise
temperature range. The AD9241 provides nearly 13 ENOB performance and has an input referred noise of 0.36 LSB rms. The input of the AD9241 is highly flexible, allowing for easy interfacing to imaging, communications, medical, and data-
Flexible Analog Input Range
acquisition systems. A truly differential input structure allows The versatile onboard sample-and-hold (SHA) can be configured for both single-ended and differential input interfaces of varying for either single-ended or differential inputs of varying input spans. input spans. The sample-and-hold amplifier (SHA) is equally
Flexible Digital Outputs
suited for both multiplexed systems that switch full-scale voltage The digital outputs can be configured to interface with +3 V and levels in successive channels as well as sampling single-channel +5 V CMOS logic families. inputs at frequencies up to and beyond the Nyquist rate. Also, the AD9241 performs well in communication systems employ- ing Direct-IF Down Conversion since the SHA in the differen- tial input mode can achieve excellent dynamic performance well beyond its specified Nyquist frequency of 0.625 MHz. A single clock input is used to control all internal conversion cycles. The digital output data is presented in straight binary output format. An out-of-range (OTR) signal indicates an over- flow condition which can be used with the most significant bit to determine low or high overflow. REV. 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
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