Overview
The AD7091R-5 is a 12-bit, multichannel, ultra-low power, successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 2.7 V to 5.25 V power supply and is notable for its ultra-low power consumption, typically 24 µA at a 3 V supply in fast mode. The AD7091R-5 features a 2-wire serial interface compatible with I2C interfaces, allowing for flexible control over the conversion process through sample mode, autocycle mode, or command mode via I2C write operations.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Conversion Time | 550 | - | - | ns |
| Update Rate (Autocycle Setting 00) | 90 | 100 | 110 | μs |
| Update Rate (Autocycle Setting 01) | 180 | 200 | 220 | μs |
| Update Rate (Autocycle Setting 10) | 360 | 400 | 440 | μs |
| Update Rate (Autocycle Setting 11) | 720 | 800 | 880 | μs |
| Throughput Rate (fSCL = 400 kHz, command mode) | - | - | 22.22 | kSPS |
| VDD Range | 2.7 | - | 5.25 | V |
| VDRIVE Range | 1.8 | - | 5.25 | V |
| IDD (Normal Mode - Static, VDD = 5.25 V) | 22 | - | 50 | μA |
| IDD (Normal Mode - Operational, VDD = 5.25 V, fSCL = 400 kHz) | 26 | - | - | μA |
Key Features
- Ultra-low power consumption: Typically 24 µA at 3 V supply in fast mode.
- 12-bit successive approximation ADC with four single-ended analog input channels and a channel sequencer for sequential conversion.
- 2-wire serial interface compatible with I2C interfaces, supporting sample mode, autocycle mode, and command mode.
- On-chip conversion clock and accurate 2.5 V reference.
- Programmable out-of-bounds user alert function and flexible power management options.
- Wide bandwidth track-and-hold amplifier capable of handling input frequencies up to 1.5 MHz.
- On-chip configuration register for setting up different operating conditions, including power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins.
Applications
The AD7091R-5 is suitable for a variety of applications where low power consumption and high precision are critical. These include:
- Battery-powered devices and portable electronics due to its ultra-low power consumption.
- Medical devices, such as portable health monitors and diagnostic equipment, where precision and low power are essential.
- Industrial automation and control systems, where the device's ability to handle multiple analog inputs and its programmable features are beneficial.
- Automotive systems, particularly in applications requiring low power and high reliability.
Q & A
- What is the typical power consumption of the AD7091R-5 at 3 V supply in fast mode?
The AD7091R-5 typically consumes 24 µA at a 3 V supply in fast mode. - How many analog input channels does the AD7091R-5 have?
The AD7091R-5 has four single-ended analog input channels. - What type of serial interface does the AD7091R-5 support?
The AD7091R-5 supports a 2-wire serial interface compatible with I2C interfaces. - What is the maximum input frequency that the track-and-hold amplifier can handle?
The track-and-hold amplifier can handle input frequencies up to 1.5 MHz. - Does the AD7091R-5 have an on-chip conversion clock and reference voltage?
Yes, the AD7091R-5 features an on-chip conversion clock and an accurate 2.5 V reference voltage. - What are the power supply voltage ranges for the AD7091R-5?
The AD7091R-5 operates from a single 2.7 V to 5.25 V power supply and the VDRIVE range is from 1.8 V to 5.25 V. - How does the AD7091R-5 manage power consumption?
The AD7091R-5 uses advanced design techniques to achieve ultra-low power dissipation and features flexible power management options. - What is the purpose of the on-chip configuration register in the AD7091R-5?
The on-chip configuration register allows users to set up different operating conditions, including power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins. - Is there an evaluation board available for the AD7091R-5?
Yes, the EVAL-AD7091R-5SDZ is a fully featured evaluation board designed to evaluate the features of the AD7091R-5. - What package options are available for the AD7091R-5?
The AD7091R-5 is available in 20-Lead LFCSP (4mm x 4mm w/ EP) and 20-Lead TSSOP packages.
