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AD7091R-5

更新时间: 2024-11-05 01:00:39
品牌 Logo 应用领域
亚德诺 - ADI /
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35页 831K
描述
4-Channel, I 2 C, Ultralow Power 12-Bit ADC in 20-Lead LFCSP/TSSOP

AD7091R-5 数据手册

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4-Channel, I2C, Ultralow Power,  
12-Bit ADC in 20-Lead LFCSP/TSSOP  
Data Sheet  
AD7091R-5  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
REF  
/
IN  
I2C-compatible serial interface supports standard and  
MUX  
ADC  
V
REF  
OUT  
OUT  
IN  
DD  
REGCAP  
fast modes  
Ultralow power: 90 µW typical at 3 V in fast mode  
Specified for VDD of 2.7 V to 5.25 V  
On-chip accurate 2.5 V reference, 5 ppm/°C typical drift  
4 single-ended analog input channels  
ALERT function  
2.5V  
VREF  
V
V
V
V
0
1
2
3
IN  
IN  
IN  
IN  
12-BIT  
SUCCESSIVE  
APPROXIMATION  
ADC  
INPUT  
MUX  
T/H  
BUSY function  
Autocycle mode  
Wide input bandwidth  
68 dB signal-to-noise ratio (SNR) typical at input  
frequency of 1 kHz  
ON-CHIP  
OSC  
RESET  
CONVST/GPO  
1
CHANNEL  
SEQUENCER  
SDA  
SCL  
CONTROL  
LOGIC  
2
I C INTERFACE  
AS  
AS  
0
1
AD7091R-5  
Flexible power/throughput rate management  
No pipeline delays  
V
DRIVE  
Power-down mode  
550 nA typical at VDD = 5.25 V  
435 nA typical at VDD = 3 V  
GND  
ALERT/BUSY/ GPO GND  
2
GPO  
0
Figure 1.  
20-lead LFCSP and 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-5 is a 12-bit, multichannel, ultralow power, succes-  
sive approximation analog-to-digital converter (ADC). The  
AD7091R-5 operates from a single 2.7 V to 5.25 V power supply  
and typically consumes only 24 µA at a 3 V supply in fast mode.  
The AD7091R-5 offers four single-ended analog input channels  
with a channel sequencer that allows a preprogrammed  
selection of channels to be converted sequentially.  
The AD7091R-5 uses advanced design techniques to achieve  
ultralow power dissipation without compromising performance. It  
also features 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 before acquisition by the ADC.  
The AD7091R-5 provides a 2-wire serial interface compatible  
with I2C interfaces. The conversion process can be controlled by  
CONVST  
a sample mode via the  
/GPO1 pin, an autocycle mode  
selected through software control, or a command mode in  
which conversions occur across I2C write operations.  
The device contains a wide bandwidth track-and-hold amplifier  
that can handle input frequencies up to 1.5 MHz. The AD7091R-5  
also features an on-chip conversion clock, an on-chip accurate  
2.5 V reference, and a programmable out of bounds user alert  
function.  
Rev. 0  
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. Trademarksandregisteredtrademarksare the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
©2015 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 

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