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AD7989-1BRMZ
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Product Detailed Parameters
- Description：IC ADC 18BIT SAR 10MSOP
- Series：PulSAR®
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：18
- Sampling Rate (Per Second)：100k
- Number of Inputs：1
- Input Type：Differential
- Data Interface：SPI, DSP
- Configuration：S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：External
- Voltage - Supply, Analog：2.375V ~ 2.625V
- Voltage - Supply, Digital：2.375V ~ 2.625V
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：10-MSOP
- Mounting Type：Surface Mount
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Overview
The AD7989-1BRMZ is an 18-bit, 100 kSPS PulSAR analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It features a true differential analog input voltage range of ±VREF with VREF between 2.4 V and 5.1 V. The device operates from a single 2.5 V supply with a separate 1.8 V to 5 V logic interface. Key performance metrics include a typical Integral Nonlinearity (INL) of ±1 LSB, a Signal-to-Noise Ratio (SNR) of 98 dB at fIN = 1 kHz with VREF = 5 V, and a Total Harmonic Distortion (THD) of −119 dB under the same conditions. Power dissipation is 700 µW at 100 kSPS total. It utilizes a proprietary serial interface compatible with SPI, QSPI, Microwire, and DSP standards.
Feature Summary
- Zero latency architecture providing immediate conversion results without pipeline delay.
- Low power dissipation scaling linearly with throughput for battery-powered applications.
- Versatile serial interface supporting daisy-chaining multiple ADCs on a single bus.
Applications
- Automated test equipment
- Data acquisition systems
- Medical instruments
- Machine automation
Procurement Notes
Verify the specific suffix BRMZ indicates the MSOP package and industrial temperature grade (-40°C to +85°C). Confirm that the ordering information matches the Rev. C datasheet specifications. Ensure external reference voltage requirements are met within the 2.4 V to 5.1 V range for optimal performance.
Selection Notes
Select this component when high resolution and low power consumption are required for differential signal acquisition. The AD7989-1 variant is suitable for applications requiring up to 100 kSPS throughput. Consider the AD7989-5 if higher speed up to 500 kSPS is needed, noting the increased power consumption.
Part Context
The AD7989-1BRMZ belongs to the AD7989-1/AD7989-5 family of 18-bit PulSAR ADCs. These devices share the same core architecture and pinout but differ in maximum sampling rates. The BRMZ suffix specifically denotes the 10-lead MSOP package option available for this series.
Replacement Considerations
The AD7989-5BRMZ is a pin-compatible alternative offering 500 kSPS throughput instead of 100 kSPS. Other 18-bit SAR ADCs may require circuit redesign due to different pinouts or interface protocols.
FAQ
What is the maximum reference voltage supported by the AD7989-1BRMZ?
The reference voltage (VREF) can be set independently of the supply voltage and must be between 2.4 V and 5.1 V.
Does the AD7989-1BRMZ have a pipeline delay?
No, the device features a zero latency architecture where conversion results are available immediately after the completed conversion.
How does the SDI/CS pin function in chain mode?
In chain mode, selected by holding SDI/CS low during the CNV rising edge, it acts as a data input that daisy-chains conversion results from multiple ADCs onto a single SDO line.
