Overview
The AD7989-5BRMZ is an 18-bit, successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7989 family, which includes the AD7989-1 and AD7989-5 models, differing primarily in their conversion rates. The AD7989-5BRMZ operates at a conversion rate of 500 kSPS (kilosamples per second), making it suitable for high-speed applications. It features a low power consumption profile, which scales linearly with throughput, and is ideal for battery-powered systems due to its efficient power management.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 18 bits |
| Conversion Rate | 500 kSPS |
| Input Type | Differential |
| Reference Voltage | Externally applied, independent of VDD |
| Power Supply | Single supply, VDD: 2.5 V ± 5% |
| Power Consumption | Typically 700 µW at 100 kSPS (for AD7989-1, but scales with throughput) |
| Package | 10-Lead MSOP |
| Operating Temperature Range | −40°C to +85°C |
| Logic Compatibility | 1.8 V, 2.5 V, 3 V, and 5 V |
| Differential Nonlinearity Error (DNL) | −0.85 ± 0.5 + 1.5 LSB |
| Integral Nonlinearity Error (INL) | −2 ± 1 + 2 LSB |
Key Features
- Successive approximation ADC with on-chip track-and-hold amplifier, eliminating pipeline delay or latency.
- SPI-compatible serial interface, allowing daisy-chaining of multiple ADCs on a single 3-wire bus.
- Low power consumption, making it suitable for battery-powered applications.
- Compatible with various digital logic families (1.8 V, 2.5 V, 3 V, and 5 V) using a separate VIO supply.
- Available in compact 10-lead MSOP and LFCSP packages, facilitating space savings and flexible configurations.
Applications
The AD7989-5BRMZ is versatile and can be used in a variety of applications, including:
- Battery-powered systems due to its low power consumption.
- High-speed data acquisition systems requiring precise and rapid conversion rates.
- Multiplexed channel applications where the absence of pipeline delay is beneficial.
- Industrial and medical devices that require high accuracy and reliability.
Q & A
- What is the conversion rate of the AD7989-5BRMZ? The AD7989-5BRMZ operates at a conversion rate of 500 kSPS.
- What is the resolution of the AD7989-5BRMZ? The resolution is 18 bits.
- What type of input does the AD7989-5BRMZ support? It supports differential inputs.
- How is the reference voltage applied to the AD7989-5BRMZ? The reference voltage is applied externally and can be set independent of the supply voltage, VDD.
- What is the typical power consumption of the AD7989-5BRMZ at 100 kSPS? Typically 700 µW, though this scales with throughput.
- In what packages is the AD7989-5BRMZ available? It is available in 10-lead MSOP and LFCSP packages.
- What is the operating temperature range of the AD7989-5BRMZ? The operating temperature range is −40°C to +85°C.
- Is the AD7989-5BRMZ compatible with different logic families? Yes, it is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic families.
- Does the AD7989-5BRMZ have any pipeline delay or latency? No, it does not exhibit any pipeline delay or latency due to its on-chip track-and-hold amplifier.
- Can multiple AD7989-5BRMZ devices be daisy-chained? Yes, they can be daisy-chained using the SPI-compatible serial interface on a single 3-wire bus.
