Overview
The AD7623AST is a 16-bit, 1.33 MSPS (Mega Samples Per Second) PulSAR® (Successive Approximation Register) analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single 2.5 V power supply and is designed for high-speed and low-power applications. It features a charge redistribution SAR architecture, an internal conversion clock, an internal reference with a buffer, and error correction circuits. The AD7623AST is available in a 48-lead low profile quad flatpack (LQFP) package and is specified to operate from −40°C to +85°C, making it suitable for a wide range of environments.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Resolution | 16 | Bits | |||
| Analog Input Voltage Range | VIN+ − VIN− | −VREF | +VREF | V | |
| Operating Input Voltage | VIN+, VIN− to AGND | −0.1 | AVDD1 | V | |
| Analog Input CMRR | fIN = 100 kHz | 55 | dB | ||
| Input Current | 1.33 MSPS throughput | 10 | μA | ||
| Throughput Speed | Complete Cycle | 750 | ns | ||
| Throughput Rate | 0 | 1.33 | MSPS | ||
| Integral Linearity Error | VREF = 2.048 V, PDREF = high | −2 | ±1 | +2 | LSB |
| Differential Linearity Error | VREF = 2.048 V, PDREF = high | −1 | +2 | LSB |
Key Features
- Fast Throughput: The AD7623AST is a 1.33 MSPS charge redistribution SAR ADC, making it suitable for high-speed applications.
- Superior Linearity: The device has no missing 16-bit codes, ensuring high accuracy in conversions.
- Internal Reference: It features a 2.048 V internal reference with a typical drift of ±7 ppm/°C, providing stable and accurate conversions.
- Single-Supply Operation: The AD7623AST operates from a single 2.5 V power supply and typically dissipates 45 mW, with power dissipation decreasing with throughput.
- Flexible Interface: The device offers versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangements compatible with 2.5 V, 3.3 V, or 5 V logic).
Applications
The AD7623AST is ideal for various applications requiring high-speed and low-power analog-to-digital conversion, such as:
- Battery-powered devices due to its power-scaling feature with throughput).
- Industrial control systems where high accuracy and speed are crucial.
- Medical devices that require precise and fast data acquisition.
- Aerospace and defense applications where reliability and performance are paramount.
Q & A
- What is the resolution of the AD7623AST ADC?
The AD7623AST has a resolution of 16 bits).
- What is the maximum throughput rate of the AD7623AST?
The maximum throughput rate is 1.33 MSPS).
- What is the operating voltage range of the AD7623AST?
The device operates from a single 2.5 V power supply).
- Does the AD7623AST have an internal reference?
Yes, it has a 2.048 V internal reference with a typical drift of ±7 ppm/°C).
- What are the available interface options for the AD7623AST?
The device offers both parallel (16- or 8-bit bus) and 2-wire serial interface arrangements).
- What is the typical power dissipation of the AD7623AST?
The typical power dissipation is 45 mW, which decreases with throughput).
- What is the operating temperature range of the AD7623AST?
The device operates from −40°C to +85°C).
- Is the AD7623AST suitable for battery-powered applications?
Yes, due to its power-scaling feature with throughput, making it ideal for battery-powered applications).
- What package types are available for the AD7623AST?
The device is available in a 48-lead low profile quad flatpack (LQFP) and a lead frame chip-scale (LFCSP_VQ) package).
- Does the AD7623AST have any missing codes?
No, the AD7623AST has no missing 16-bit codes).
