Overview
The AD7921AUJZ-REEL7 is a 12-bit, high-speed, low-power, 2-channel successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This component operates from a single power supply ranging from 2.35 V to 5.25 V and features a throughput rate of up to 250 kSPS. The AD7921 is designed for applications requiring high speed, low power consumption, and precise analog-to-digital conversion.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12-bit | - | - |
| Conversion Time | 3.2 μs max | μs | 16 SCLK cycles with SCLK at 5 MHz |
| Throughput Rate | 250 kSPS max | kSPS | - |
| Track-and-Hold Acquisition Time | 290 ns max | ns | - |
| VDD | 2.35 V to 5.25 V | V | Minimum and maximum power supply voltage |
| Normal Mode (Operational) Current | 4 mA max (VDD = 2.35 V to 3.6 V), 2 mA max (VDD = 4.75 V to 5.25 V) | mA | fSAMPLE = 250 kSPS |
| Full Power-Down Mode (Static) Current | 1 μA max | μA | SCLK on or off |
| Package Type | 8-lead TSOT | - | - |
Key Features
- Fast throughput rate: up to 250 kSPS
- Low power consumption: 4 mW typ at 250 kSPS with 3 V supplies, 13.5 mW typ at 250 kSPS with 5 V supplies
- Wide input bandwidth: can handle input frequencies in excess of 6 MHz
- No pipeline delays
- High speed serial interface: SPI/QSPI/MICROWIRE/DSP compatible
- Standby mode: 1 μA maximum current
- Flexible power/serial clock speed management
Applications
- Battery-powered systems
- Personal digital assistants
- Medical instruments
- Mobile communications
- Instrumentation and control systems
- Data acquisition systems
- High speed modems
- Optical sensors
Q & A
- What is the resolution of the AD7921AUJZ-REEL7?
The AD7921AUJZ-REEL7 has a resolution of 12 bits.
- What is the maximum throughput rate of the AD7921AUJZ-REEL7?
The maximum throughput rate is up to 250 kSPS.
- What is the operating voltage range of the AD7921AUJZ-REEL7?
The operating voltage range is from 2.35 V to 5.25 V.
- What is the typical power consumption at 250 kSPS with a 3 V supply?
The typical power consumption is 4 mW.
- Does the AD7921AUJZ-REEL7 have pipeline delays?
No, the AD7921AUJZ-REEL7 does not have pipeline delays.
- What types of serial interfaces are supported by the AD7921AUJZ-REEL7?
The AD7921AUJZ-REEL7 supports SPI, QSPI, MICROWIRE, and DSP compatible serial interfaces.
- What is the maximum current in standby mode?
The maximum current in standby mode is 1 μA.
- What is the package type of the AD7921AUJZ-REEL7?
The package type is 8-lead TSOT.
- What are some common applications of the AD7921AUJZ-REEL7?
Common applications include battery-powered systems, medical instruments, mobile communications, instrumentation and control systems, and data acquisition systems.
- How does the AD7921AUJZ-REEL7 manage power and serial clock speed?
The AD7921AUJZ-REEL7 features flexible power and serial clock speed management.
