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AD7278 Dataheets PDF



Part Number AD7278
Manufacturers Analog Devices
Logo Analog Devices
Description 12-/10-/8-Bit ADCs
Datasheet AD7278 DatasheetAD7278 Datasheet (PDF)

Data Sheet 3 MSPS, 12-/10-/8-Bit ADCs in 6-Lead TSOT AD7276/AD7277/AD7278 FEATURES Throughput rate: 3 MSPS Specified for VDD of 2.35 V to 3.6 V Power consumption 12.6 mW at 3 MSPS with 3 V supplies Wide input bandwidth 70 dB SNR at 1 MHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface SPI-/QSPI™-/MICROWIRE™-/DSP compatible Temperature range: −40°C to +125°C Power-down mode: 0.1 μA typical 6-lead TSOT package 8-lead MSOP package AD7476.

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Data Sheet 3 MSPS, 12-/10-/8-Bit ADCs in 6-Lead TSOT AD7276/AD7277/AD7278 FEATURES Throughput rate: 3 MSPS Specified for VDD of 2.35 V to 3.6 V Power consumption 12.6 mW at 3 MSPS with 3 V supplies Wide input bandwidth 70 dB SNR at 1 MHz input frequency Flexible power/serial clock speed management No pipeline delays High speed serial interface SPI-/QSPI™-/MICROWIRE™-/DSP compatible Temperature range: −40°C to +125°C Power-down mode: 0.1 μA typical 6-lead TSOT package 8-lead MSOP package AD7476 and AD7476A pin compatible GENERAL DESCRIPTION The AD7276/AD7277/AD7278 are 12-/10-/8-bit, high speed, low power, successive approximation analog-to-digital converters (ADCs), respectively. The parts operate from a single 2.35 V to 3.6 V power supply and feature throughput rates of up to 3 MSPS. The parts contain a low noise, wide bandwidth trackand-hold amplifier that can handle input frequencies in excess of 55 MHz. The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS, and the conversion is initiated at this point. There are no pipeline delays associated with the part. The AD7276/AD7277/AD7278 use advanced design techniques to achieve very low power dissipation at high throughput rates. The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC; therefore, the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK. FUNCTIONAL BLOCK DIAGRAM VDD 12-/10-/8-BIT VIN SUCCESSIVE T/H APPROXIMATION ADC AD7276/ AD7277/ AD7278 CONTROL LOGIC SCLK SDATA CS 04903-001 Table 1. Part Number AD7276 AD7277 AD7278 AD72741 AD72731 GND Figure 1. Resolution 12 10 8 12 10 Package 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 6-Lead TSOT 8-Lead MSOP 8-Lead TSOT 8-Lead MSOP 8-Lead TSOT 1 Part contains external reference pin. PRODUCT HIGHLIGHTS 1. 3 MSPS ADCs in a 6-lead TSOT package. 2. AD7476/AD7477/AD7478 and AD7476A/AD7477A/ AD7478A pin compatible. 3. High throughput with low power consumption. 4. Flexible power/serial clock speed management. This allows maximum power efficiency at low throughput rates. 5. Reference derived from the power supply. 6. No pipeline delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control. Rev. E Document Feedback 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 may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2005–2020 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com AD7276/AD7277/AD7278 TABLE OF CONTENTS Features .............................................................................................. 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Product Highlights ........................................................................... 1 Revision History ............................................................................... 2 Specifications .................................................................................... 3 AD7276 Specifications................................................................. 3 AD7277 Specifications................................................................. 5 AD7278 Specifications................................................................. 7 Timing Specifications—AD7276/AD7277/AD7278 ............... 8 Timing Examples........................................................................ 10 Absolute Maximum Ratings ......................................................... 11 ESD Caution................................................................................ 11 Pin Configurations and Function Descriptions......................... 12 Performance Characteristics......................................................... 13 Terminology.................................................................................... 15 REVISION HISTORY 7/2020—Rev. D to Rev. E Change to Table 3............................................................................. 5 7/2015—Rev. C to Rev. D Changes to Differential Nonlinearity Parameter, Table 2 .......... 3 Changes to Typical Connection Diagram Section..................... 16 .


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