AD7999: 4-Channel, 8-Bit ADC with I²C Compatible Interface in 8-Lead SOT-23

AD7999 Data Sheet Rev B, 10/2010 (pdf 776kB)

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Product Details

Check Price and Availability Add to Signal Chain Designer Explore in Signal Chain Designer

Model	Package	Price* (100-499)	Price* 1000 pcs
AD7999ARJZ-1RL Status: Production	8 ld SOT-23	-	$1.35
AD7999YRJZ-1500RL7 Status: Production	8 ld SOT-23	$1.85	$1.52
AD7999YRJZ-1RL Status: Production	8 ld SOT-23	-	$1.52

The AD7991/AD7995/AD7999 are 12-/10-/8-bit, low power, successive approximation ADCs with an I²C compatible interface. Each part operates from a single 2.7 V to 5.5 V power supply and features a 1 μs conversion time.

Each AD7991/AD7995/AD7999 provides a 2-wire serial interface compatible with I²C interfaces. The AD7991 and AD7995 come in two versions and each version has an individual I²C address. This allows two of the same devices to be connected to the same I²C bus. Both versions support standard, fast, and high speed I²C interface modes. The AD7999 comes in one version.

The AD7991/AD7995/AD7999 normally remain in a shutdown state, powering up only for conversions. The conversion process is controlled by a command mode, during which each I²C read operation initiates a conversion and returns the result over the I²C bus.

When four channels are used as analog inputs, the reference for the part is taken from V_DD; this allows the widest dynamic input range to the ADC. Therefore, the analog input range to the ADC is 0 V to V_DD. An external reference, applied through the V_IN3/V_REF input, can also be used with this part.

Product Highlights

Four single-ended analog input channels, or three single-ended analog input channels and one reference input channel.
I²C compatible serial Interface. Standard, Fast and Hs-Modes
Automatic shutdown.
Reference derived from the power supply or external reference.
8-lead SOT-23 Package.

Applications

System Monitoring
Battery Powered Systems
Data Acquisition
Medical Instruments

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FEATURES and BENEFITS

12-/10-/8-bit ADC with fast conversion time: 1 μs typical
4 analog input channels/3 analog input channels with reference input
Specified for V_DD of 2.7 V to 5.5 V
Sequencer operation
Temperature Range: -40 °C to 125 °C

I²C ®-compatible serial interface supports standard, fast, and High-speed modes
2 versions allow 2 I²C addresses
Low power consumption
Shutdown mode: 1 μA max
8-lead SOT-23 package

Functional Block Diagram for AD7999

Typical Applications and Other Diagrams

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Documentation

Title	Content Type	File Type
AD7991/AD7995/AD7999: 4-Channel, 12-/10-/8-Bit ADC with I²C Compatible Interface in 8-Lead SOT-23 Data Sheet (Rev B, 10/2010) (pdf, 776 kB)	Data Sheets	PDF
AN-1233: Using the AD8599 Op Amp as an Ultralow Distortion Driver for the AD7999 4-Channel, 8-Bit ADC (pdf, 91 kB)	Application Notes	PDF
AN-931: Understanding PulSAR ADC Support Circuitry (pdf, 299 kB) This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.	Application Notes	PDF
MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)	Technical Articles	PDF
Analog-to-Digital Converter and Driver ICs	Solutions Bulletins	HTML
RAQs index	Rarely Asked Questions	HTML
Glossary of EE Terms	Glossary	HTML

Design Tools,Models,Drivers & Software

Title	Content Type	File Type
AD799x - No-OS Driver for Renesas Microcontroller Platforms	Device Drivers	HTML
AD799x - No-OS Driver for Microchip Microcontroller Platforms	Device Drivers	HTML
AD7998 IIO ADC Linux Driver (Wiki Site)	Device Drivers	HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products

Recommended Input Buffer Amplifiers for the AD7999

For low distortion, low noise, dual supplies, we recommend the AD8599.

For precision, low noise, single supply, we recommend the AD8605 family of operational amplifiers.

For single supply, high speed, low power, we suggest the AD8031 or the dual AD8032.

For precision, high speed, low cost, we recommend the quad AD8604.

Recommended External References - 2.5V for the AD7999

For applications requiring best accuracy, low noise, low drift, we recommend the ADR421 or AD780.

For low noise, high output current applications, we recommend the ADR431.

For wide supply applications, we recommend the ADR03 or AD780.

For cost sensitive applications, we suggest the AD1582, ADR381 or ADR391.

For the reference buffer amplifier, we recommend the AD8605.

For applications requiring 2.048V to 4.096V, we recommend the REF191 reference family.

Recommended Digital Isolators for the AD7999

For dual I2C isolators, we recommend the ADuM1250, ADuM1251, ADuM2250 or the ADuM2251.

Sample & Buy

Price, packaging, availability

AD7999 Model Options

Print Table

Model	Package	Pins	Temp. Range	Packing, Qty	Price*(100-499)	Price*1000 pcs	RoHS	View PCN/ PDN	Check Inventory/ Purchase/Sample
AD7999ARJZ-1RL Status: Production	8 ld SOT-23	8	Ind	Reel, 10000	-	$1.35	Y Material Info	PCN	Purchase
AD7999YRJZ-1500RL7 Status: Production	8 ld SOT-23	8	Ind	Reel, 500	$1.85	$1.52	Y Material Info	PCN	Purchase Sample
AD7999YRJZ-1RL Status: Production	8 ld SOT-23	8	Ind	Reel, 10000	-	$1.52	Y Material Info	PCN	Purchase

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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AD7999: 4-Channel, 8-Bit ADC with I²C Compatible Interface in 8-Lead SOT-23