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AD7091R-4BRUZ Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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1 / 41 page 2-/4-/8-Channel, 1 MSPS, Ultralow Power, 12-Bit ADC in 16-/20-/24-Lead TSSOP Data Sheet AD7091R-2/AD7091R-4/AD7091R-8 FEATURES Fast throughput rate: 1 MSPS Specified for VDD of 2.7 V to 5.25 V Ultralow power: 467 µA typical at 3 V and 1 MSPS On-chip accurate 2.5 V reference, 5 ppm/°C typical drift 2, 4, and 8 single-ended analog input channels Programmable channel sequencer ALERT function available in 4- and 8-channel versions BUSY indication available in 4- and 8-channel versions GPOx pins available in 4- and 8-channel versions Wide input bandwidth 70 dB signal-to-noise ratio (SNR) typical at input frequency of 10 kHz Flexible power/throughput rate management No pipeline delays High speed serial interface SPI/QSPI™/MICROWIRE™/DSP compatible Daisy-chain mode Power-down mode 550 nA typical at VDD = 5.25 V 435 nA typical at VDD = 3 V 16-lead, 20-lead, and 24-lead TSSOP packages Temperature range: −40°C to +125°C APPLICATIONS Battery-powered systems Personal digital assistants Medical instruments Mobile communications Instrumentation and control systems Data acquisition systems Optical sensors Diagnostic/monitoring functions GENERAL DESCRIPTION The AD7091R-2/AD7091R-4/AD7091R-8 family is a multichannel 12-bit, ultralow power, successive approximation analog-to- converter (ADC) that is available in two, four, or eight analog input channel options. The AD7091R-2/AD7091R-4/AD7091R-8 operate from a single 2.7 V to 5.25 V power supply and is capable of achieving a sampling rate of 1 MSPS. The AD7091R-2/ AD7091R-4/AD7091R-8 contain a wide bandwidth track-and- hold amplifier that can operate at input frequencies in excess of 1.5 MHz. The AD7091R-2/AD7091R-4/AD7091R-8 also feature an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a high speed serial interface. FUNCTIONAL BLOCK DIAGRAM Figure 1. The AD7091R-2/AD7091R-4/AD7091R-8 family offers up to eight single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially. The AD7091R-2/AD7091R-4/AD7091R-8 have a serial port interface (SPI) that allows data to be read after the conversion while achieving a 1 MSPS throughput rate. The conversion process and data acquisition are controlled using the CONVST pin. The AD7091R-2/AD7091R-4/AD7091R-8 use advanced design techniques to achieve ultralow power dissipation at high throughput rates. They also feature flexible power management options. An on-chip configuration register allows the user to set up different operating conditions. These include power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins. The MUXOUT and ADCIN pins allow signal conditioning of the multiplexer output prior to acquisition by the ADC. GND REGCAP VDD AD7091R-8 REFIN/ REFOUT MUXOUT ADCIN GND T/H I/P MUX CHANNEL SEQUENCER CONTROL LOGIC AND REGISTERS 12-BIT SUCCESSIVE APPROXIMATION ADC 2.5V VREF ON-CHIP OSC GPO1 ALERT/ BUSY/ GPO0 SDO SDI VDRIVE CONVST RESET SCLK CS VIN0 VIN1 VIN2 VIN3 VIN7 VIN6 VIN5 VIN4 Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
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