The AD9649BCPZ-40 from Analog Devices is a 14-bit, 40 MSPS monolithic analog-to-digital converter operating from a single 1.8 V supply. It features a high-performance sample-and-hold circuit, on-chip voltage reference, and SNR of 74.7 dBFS at 9.7 MHz input. The device uses a pipelined architecture with output error correction for guaranteed no-missing codes over the full operating temperature range.<\/p>\n
Product Overview The AD9649BCPZ-40 from Analog Devices is a 14-bit, 40 MSPS monolithic analog-to-digital converter operating from a single 1.8 V supply. It features a high-performance sample-and-hold circuit, on-chip voltage reference, and SNR of 74.7 dBFS at 9.7 MHz input. The device uses a pipelined architecture with output error correction for guaranteed no-missing codes over […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,13],"tags":[],"chip_brand":[165],"class_list":["post-8428","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-adi"],"acf":{"brief_explanation":"14-bit 40MSPS ADC, 1.8V, SNR 74.7dBFS, 700MHz BW, LFCSP-32","date_code":"","package_case":"32-Lead LFCSP (5 \u00d7 5 \u00d7 0.85 mm w\/ EP)","in_stock":6012,"datasheet":"https:\/\/www.analog.com\/media\/en\/technical-documentation\/data-sheets\/AD9649.pdf","price":"$18.25 @ 1ku","product_introduction":"The AD9649BCPZ-40 is a 14-bit, 40 MSPS analog-to-digital converter from Analog Devices designed for communications and instrumentation applications. Operating from a single 1.8 V analog supply with a separate 1.8 V to 3.3 V output driver supply, the device achieves 74.7 dBFS SNR and 93 dBc SFDR at 9.7 MHz input frequency. The multi-stage differential pipelined architecture with output error correction guarantees no missing codes over the full -40\u00b0C to +85\u00b0C temperature range. A patented sample-and-hold circuit maintains excellent performance for input frequencies up to 200 MHz. The SPI interface enables flexible configuration including data format selection, clock divider settings, power-down modes, and digital test pattern generation. The 32-lead LFCSP package is pin-compatible with AD9629 (12-bit) and AD9609 (10-bit), providing an easy resolution migration path.","working_principle":"The AD9649 employs a multi-stage differential pipelined architecture. The input signal is first captured by a sample-and-hold circuit with 700 MHz bandwidth, then digitized through a cascade of sub-ADC stages. Each stage resolves a portion of the bits and passes the residue to the next stage, with digital error correction ensuring 14-bit accuracy. The on-chip 1.0 V bandgap reference sets the full-scale range (2 V p-p differential). An optional clock divider (1, 2, or 4) reduces the effective sample rate. Digital output data is available in offset binary, Gray code, or two's complement format via 14 parallel CMOS output pins. A Data Clock Output (DCO) provides precise output latch timing. The SPI interface allows runtime configuration of operating modes, data alignment, and test pattern injection.","pin_description":"
| Pin<\/th> | Name<\/th> | Description<\/th><\/tr> | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | CLK+<\/td> | Differential Encode Clock+<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 2<\/td> | CLK-<\/td> | Differential Encode Clock-<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 3, 24, 29, 32<\/td> | AVDD<\/td> | 1.8 V Analog Supply<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 4<\/td> | CSB<\/td> | SPI Chip Select (Active Low)<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 5<\/td> | SCLK\/DFS<\/td> | SPI Clock \/ Data Format Select<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 6<\/td> | SDIO\/PDWN<\/td> | SPI Data I\/O \/ Power-Down<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 7-12, 14-21<\/td> | D0-D13<\/td> | ADC Digital Outputs (D0=LSB, D13=MSB)<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 13<\/td> | DRVDD<\/td> | Output Driver Supply (1.8-3.3V)<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 22<\/td> | DCO<\/td> | Data Clock Output<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 23<\/td> | MODE\/OR<\/td> | Mode Select \/ Out-of-Range Output<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 25<\/td> | VREF<\/td> | 1.0 V Reference Input\/Output<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 26<\/td> | SENSE<\/td> | Reference Mode Selection<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 27<\/td> | VCM<\/td> | Common-Mode Voltage Output<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 28<\/td> | RBIAS<\/td> | Bias Resistor (10 k\u03a9 to GND)<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 30, 31<\/td> | VIN-, VIN+<\/td> | Differential Analog Input<\/td><\/tr> | ||||||||||||||||||||||||||||||
| 0<\/td> | EPAD<\/td> | Exposed Paddle (GND, must solder)<\/td><\/tr><\/table>","application_scenarios":"
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