AD9240 Complete 14-Bit, 10 MSPS Monolithic A/D Converter

The AD9240 is a 10 MSPS, single supply, 14-bit analog-to- digital converter (ADC). It combines a low cost, high speed CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid implementations at a fraction of the power consumption and cost. It is a complete, monolithic ADC with an on-chip, high performance, low noise sample-and-hold amplifier and programmable voltage reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. The device uses a multistage differential pipelined architecture with digital output error correction logic to guarantee no missing codes over the full operating temperature range.

The input of the AD9240 is highly flexible, allowing for easy interfacing to imaging, communications, medical and data-acquisition systems. A truly differential input structure allows for both single-ended and differential input interfaces of varying input spans. The sample-and-hold amplifier (SHA) is equally suited for multiplexed systems that switch full-scale voltage levels in successive channels as well as sampling single-channel inputs at frequencies up to and beyond the Nyquist rate. The AD9240 also performs well in communication systems employing Direct-IF Down Conversion, since the SHA in the differential input mode can achieve excellent dynamic performance well 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.

Features and Benefits

Low Power Dissipation: 285 mW
Single +5 V Supply
Integral Nonlinearity Error: 2.5 LSB
Differential Nonlinearity Error: 0.6 LSB
Input Referred Noise: 0.36 LSB
On-Chip Sample-and-Hold Amplifier and Voltage Reference

Signal-to-Noise and Distortion
Ratio: 77.5 dB
Spurious-Free Dynamic Range: 90 dB
Out-of-Range Indicator
Straight Binary Output Data
44-Lead MQFP

Analog to Digital Converters

Aerospace and Defense

Solutions

Data Sheets

Document	note
AD9240: Complete 14-Bit, 10 MSPS Monolithic A/D Converter Data Sheet (Rev. B)	PDF 328 kB

Application Notes

Document	note
AN-905: Visual Analog Converter Evaluation Tool Version 1.0 User Manual (Rev. 0)	PDF 2124 kB
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)	PDF 985 kB
AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)	PDF 227 kB
AN-282: Fundamentals of Sampled Data Systems	PDF 2131 kB
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)	PDF 291.7 K
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)	PDF 363 kB
AN-345: Grounding for Low-and-High-Frequency Circuits	PDF 455 kB
AN-737: How ADIsimADC Models an ADC (Rev. B)	PDF 373 kB
AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (Rev. 0)	PDF 370.2 K
AN-741: Little Known Characteristics of Phase Noise (Rev. 0)	PDF 1679 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD9240AS Production	44 ld MQFP (13.20mm wide)	OTH 96	-55 to 85C	24.91	21.18	N
AD9240ASRL Production	44 ld MQFP (13.20mm wide)	REEL 800	-55 to 85C	0	21.18	N
AD9240ASZ Production	44 ld MQFP (13.20mm wide)	OTH 96	-55 to 85C	21.61	18.37	Y
AD9240ASZRL Production	44 ld MQFP (13.20mm wide)	REEL 800	-55 to 85C	0	18.37	Y