Datasheet AD9240 (Analog Devices)

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Complete 14-Bit, 10 MSPS Monolithic A/D Converter AD9240 FEATURES FUNCTIONAL BLOCK DIAGRAM Monolithic 14-Bit, 10 MSPS A/D Converter Low Power Dissipation: 285 mW CLK AVDD DVDD DRVDD Single +5 V Supply SHA Integral Nonlinearity Error: 2.5 LSB VINA MDAC1 MDAC2 MDAC3 BIAS 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: 77.5 dB 14 VREF OUTPUT BUFFERS OTR Spurious-Free Dynamic Range: 90 dB SENSE BIT 1 Out-of-Range Indicator 1V (MSB) MODE Straight Binary Output Data SELECT BIT 14 AD9240 (LSB) 44-Lead MQFP REFCOM AVSS DVSS DRVSS PRODUCT DESCRIPTION PRODUCT HIGHLIGHTS
The AD9240 is a 10 MSPS, single supply, 14-bit analog-to- The AD9240 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-lead 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 AD9240 consumes only 280 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 AD9240 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-
Excellent AC Performance and Low Noise
tion logic to guarantee no missing codes over the full operating The AD9240 provides nearly 13 ENOB performance and has an temperature range. input referred noise of 0.36 LSB rms. The input of the AD9240 is highly flexible, allowing for easy
Flexible Analog Input Range
interfacing to imaging, communications, medical and data- The versatile onboard sample-and-hold (SHA) can be configured acquisition systems. A truly differential input structure allows for either single ended or differential inputs of varying input spans. for both single-ended and differential input interfaces of varying input spans. The sample-and-hold amplifier (SHA) is equally
Flexible Digital Outputs
suited for 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. The
Excellent Undersampling Performance
AD9240 also performs well in communication systems employ- The full power bandwidth and dynamic range of the AD9240 ing Direct-IF Down Conversion, since the SHA in the differen- make it well suited for Direct-IF Down Conversion extending to tial input mode can achieve excellent dynamic performance well 45 MHz. beyond its specified Nyquist frequency of 5 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 overflow condition which can be used with the most significant bit to determine low or high overflow. REV.B 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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