AD7991
PRODUCTION4-Channel, 12-Bit ADC with I2C Compatible Interface in 8-Lead SOT-23
- Part Models
- 3
- 1ku List Price
- Starting From $3.91
Part Details
- 12-/10-/8-bit ADCs with fast conversion time: 1 μs typical
- 4 analog input channels/3 analog input channels with reference input
- Specified for VDD 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 maximum
- 8-lead SOT-23 package
- Qualified for automotive applications
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. The track-and-hold amplifier allows each part to handle input frequencies of up to 14 MHz, and a multiplexer allows taking samples from four channels.
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 VDD; this allows the widest dynamic input range to the ADC. Therefore, the analog input range to the ADC is 0 V to VDD;. An external reference, applied through the VIN3/VREF 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 high speed 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
Documentation
Data Sheet 1
Application Note 2
Technical Articles 1
Device Drivers 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD7991YRJZ-0500RL7 | 8-Lead SOT-23 | ||
| AD7991YRJZ-0RL | 8-Lead SOT-23 | ||
| AD7991YRJZ-1500RL7 | 8-Lead SOT-23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 16, 2017 - 16_0291 CANCELLED: Addition of Amkor Philippines as Alternate Assembly Site for 5L, 6L and 8L SOT23 Chip-On-Lead Packages |
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| AD7991YRJZ-0500RL7 | PRODUCTION | |
| AD7991YRJZ-0RL | PRODUCTION | |
| AD7991YRJZ-1500RL7 | PRODUCTION | |
|
Sep 17, 2010 - 10_0236 Change in offset error specification for AD7991, AD7995, AD7999 |
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| AD7991YRJZ-0500RL7 | PRODUCTION | |
| AD7991YRJZ-0RL | PRODUCTION | |
| AD7991YRJZ-1500RL7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
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| AD7991YRJZ-0500RL7 | PRODUCTION | |
| AD7991YRJZ-0RL | PRODUCTION | |
| AD7991YRJZ-1500RL7 | PRODUCTION | |
|
Feb 4, 2010 - 10_0009 Halogen Free Material Change for SOT_23 Products |
||
| AD7991YRJZ-0500RL7 | PRODUCTION | |
| AD7991YRJZ-0RL | PRODUCTION | |
| AD7991YRJZ-1500RL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
FPGA/HDL 1
Device Drivers 2
Evaluation Software 0
Can't find the software or driver you need?
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| I²C Isolators 4 | ||
| ADUM1250 | PRODUCTION | Hot Swappable Dual I2C Isolator |
| ADUM1251 | PRODUCTION | Hot Swappable, Dual I2C Isolators |
| ADuM2250 | PRODUCTION | Hot-Swappable Dual I2C® Isolators, 5 kV |
| ADuM2251 | PRODUCTION | Hot-Swappable Dual I2C® Isolators, 5 kV |
| Low Input Bias Current Op Amps (≤100 pA) 1 | ||
| AD8604 | PRODUCTION | DigiTrim™ RRIO Quad Op Amp with Very Low Offset Voltage |
| Low Power Op Amps (≤ 1mA/amp) 2 | ||
| AD8031 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Single Amplifier |
| AD8032 | PRODUCTION | 2.7 V, 800 µA, 80 MHz Rail-to-Rail I/O Dual Amplifier |
| Precision Op Amps (Vos ≤1mV & TCVos ≤2uV/C) 2 | ||
| AD8605 | PRODUCTION | Precision, Low Noise, CMOS, RRIO Op Amp (single) |
| AD8599 | PRODUCTION | Ultralow Distortion, Ultralow Noise Op Amp (Dual) |
| Series Voltage References 7 | ||
| REF191 | PRODUCTION | 2.048V, Precision Micropower, Low Dropout, Low Voltage Reference |
| ADR431 | PRODUCTION | Ultralow Noise XFET® Voltage References with Current Sink and Source Capability |
| ADR421 | PRODUCTION | Ultraprecision, Low Noise, 2.500 V XFET® Voltage References |
| ADR03 | PRODUCTION | Ultracompact, Precision 2.5 V Voltage Reference |
| AD1582 | PRODUCTION | 2.5V Micropower, Precisions Series Mode Voltage References |
| ADR381 | PRODUCTION | 2.048 V and 2.5 V Bandgap Voltage References |
| ADR391 | PRODUCTION | 2.5V Micropower, Low Noise Precision Voltage Reference with Shutdown |
| Shunt Voltage References 1 | ||
| AD780 | PRODUCTION | 2.5 V/3.0 V High Precision Reference |
Evaluation Kits
AD7991 Evaluation Board