Overview
The AD7485BSTZ is a high-performance, 14-bit successive-approximation register (SAR) analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed for high-speed and low-power applications, featuring a serial interface with throughput rates up to 1 MSPS. The AD7485 includes a low noise, wide bandwidth track-and-hold circuit that can handle input frequencies exceeding 40 MHz. It is housed in a 48-lead Low Profile Quad Flatpack (LQFP) package and operates over a temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 bits | |
| Sampling Rate | Up to 1 MSPS | |
| Analog Input Range | 0 V to 2.5 V | |
| Reference Voltage | 2.5 V (internal or external) | |
| Supply Voltage | 4.75 V to 5.25 V | |
| Power Consumption (Normal Mode) | 80 mW | |
| Power Consumption (NAP Mode) | 3 mW | |
| Power Consumption (STANDBY Mode) | 10 µW | |
| Digital Interface Voltage (VDRIVE) | 2.7 V to 5.25 V | |
| Package Type | 48-Lead LQFP | |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- High-speed successive-approximation register (SAR) architecture with up to 1 MSPS throughput rate.
- Low noise, wide bandwidth track-and-hold circuit capable of handling input frequencies over 40 MHz.
- On-board 2.5 V reference voltage, with the option to use an external reference source.
- Overrange indication via a fifteenth data bit.
- Low power consumption with normal, NAP, and STANDBY modes.
- VDRIVE pin for setting digital interface voltage levels from 2.7 V to 5.25 V.
- Direct compatibility with microcontrollers and DSPs through standard serial signal lines.
- Excellent AC and DC performance specifications, including low INL, DNL, offset, and gain errors.
Applications
The AD7485BSTZ is suitable for a variety of high-speed, low-power applications, including:
- Data acquisition systems.
- Medical imaging and diagnostics.
- Industrial control and automation.
- Aerospace and defense systems.
- High-speed test and measurement equipment.
Q & A
- What is the resolution of the AD7485BSTZ ADC?
The AD7485BSTZ has a resolution of 14 bits.
- What is the maximum sampling rate of the AD7485BSTZ?
The maximum sampling rate is up to 1 MSPS.
- What is the analog input voltage range of the AD7485BSTZ?
The analog input voltage range is 0 V to 2.5 V.
- Can the AD7485BSTZ use an external reference voltage?
- What are the power-saving modes available on the AD7485BSTZ?
The AD7485BSTZ has two power-saving modes: NAP mode (3 mW) and STANDBY mode (10 µW).
- What is the operating temperature range of the AD7485BSTZ?
The operating temperature range is -40°C to +85°C.
- How does the AD7485BSTZ indicate overrange conditions?
The AD7485BSTZ indicates overrange conditions via a fifteenth data bit set to a logic high if the analog input exceeds the 0 V to 2.5 V range.
- What is the purpose of the VDRIVE pin on the AD7485BSTZ?
The VDRIVE pin allows the user to set the voltage levels for the digital interface lines from 2.7 V to 5.25 V.
- Is the AD7485BSTZ compatible with microcontrollers and DSPs?
- What is the package type of the AD7485BSTZ?
The AD7485BSTZ is housed in a 48-Lead Low Profile Quad Flatpack (LQFP) package.
