Part A
AD7989-5BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6297 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7980ARMZRL7 and AD7989-5BRMZ are both 16-bit successive-approximation ADCs from Analog Devices in compatible MSOP-10 packages, making them a viable functional replacement candidate. However, the AD7989-5BRMZ offers a higher 500 kSPS throughput versus 1 MSPS on the AD7980ARMZRL7, and the two devices differ in their analog input architecture and reference configuration. Designers should validate the input driving network, reference source, and timing margins before substituting one for the other in an existing design.
Resolution and Architecture
High match
Sample Rate
Validation required
Analog Input Type
Validation required
Package Type
High match
Parts at a glance
Part B
AD7980ARMZRL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4200 Stückzahl
- Package
- MSOP-10
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7980ARMZRL7 | AD7989-5BRMZ | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 18 bit | Higher resolution provides finer quantization steps, which directly affects achievable accuracy and dynamic range in precision measurement systems. |
| Sampling Rate | 1 MSPS | 500 kSPS | Maximum throughput determines the highest signal bandwidth the ADC can digitize, affecting suitability for high-speed acquisition versus precision applications. |
| Number of Input Channels | 1 (single-ended) | 1 (differential) | Single-ended versus differential input topology affects noise immunity, common-mode rejection, and the analog front-end design required to drive the ADC. |
| Supply Voltage (Analog) | 2.5 V | 5 V | The analog supply voltage determines the input range and must match the system power rails; a mismatch requires level shifting or a different power design. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | Serial interface compatibility ensures the ADC can connect to the host controller without additional glue logic or protocol conversion. |
| Package / Mounting | 10-Lead MSOP (surface mount) | 10-Lead MSOP (surface mount) | Package footprint and mounting style must match the PCB layout for a drop-in replacement without board redesign. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | The temperature range defines the environments in which the part is guaranteed to meet specifications, critical for industrial and automotive applications. |
| Power Consumption (Typical) | 4.0 mW at 1 MSPS | 15 mW at 500 kSPS | Power consumption impacts thermal budget and battery life; a significant difference may require re-evaluation of the power supply and thermal design. |
| Reference Type | External reference | External reference | The reference architecture determines accuracy stability and whether an external reference circuit must be added or retained in the design. |
Need help validating a replacement?
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7989-5BRMZ | AD7980ARMZRL7 |
|---|---|---|
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Active |
| Number of Bits | 18 | 16 |
| Sampling Rate(Per Second) | 500k | 1M |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Pseudo-Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External | External |
| Voltage - Supply, Analog | 2.375V ~ 2.625V | 2.375V ~ 2.625V |
| Voltage - Supply, Digital | 2.375V ~ 2.625V | 2.375V ~ 2.625V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7980ARMZRL7 and the AD7989-5BRMZ?
The AD7980ARMZRL7 is a 16-bit, 1 MSPS PulSAR analog-to-digital converter with a pseudo-differential input, operating from a 2.5 V supply. The AD7989-5BRMZ is an 18-bit, 500 kSPS PulSAR ADC with a fully differential input, operating from a 5 V supply. They differ in resolution, throughput, input configuration, supply voltage, and package pinout.
Are the AD7980ARMZRL7 and AD7989-5BRMZ pin-compatible?
No. The AD7980ARMZRL7 is supplied in a 10-lead MSOP (RM) package, while the AD7989-5BRMZ is supplied in a 10-lead MSOP as well, but the two devices have different pin functions and supply requirements. A direct drop-in replacement is not supported; the PCB layout and interface must be validated against each datasheet.
What are the resolution and throughput specifications of each device?
The AD7980ARMZRL7 provides 16-bit resolution at a maximum throughput of 1 MSPS. The AD7989-5BRMZ provides 18-bit resolution at a maximum throughput of 500 kSPS. The trade-off is higher resolution versus higher sampling rate.
What input configurations do these ADCs support?
The AD7980ARMZRL7 has a pseudo-differential input structure, where the negative input is typically tied to a reference level. The AD7989-5BRMZ has a fully differential input structure, which provides better common-mode rejection and is suited to differential signal chains.
What supply voltages and reference requirements apply to each part?
The AD7980ARMZRL7 operates from a 2.5 V analog supply (VDD) with a separate VIO supply for the digital interface, and uses an external reference. The AD7989-5BRMZ operates from a 5 V analog supply with a separate VIO supply and also requires an external reference. The reference voltage range and absolute maximum ratings must be confirmed in the respective datasheets.
Which serial interface do the AD7980ARMZRL7 and AD7989-5BRMZ use?
Both devices use an SPI-compatible serial interface with a separate SDI, SDO, SCK, and CNV configuration, allowing them to interface with common microcontrollers and DSPs. The timing parameters, such as acquisition time and conversion time, differ between the two parts and must be verified from the datasheets.
In which applications would the AD7989-5BRMZ be preferred over the AD7980ARMZRL7?
The AD7989-5BRMZ is preferred where higher 18-bit resolution and a fully differential input are required, such as precision instrumentation, medical instrumentation, and high-accuracy data acquisition, at the cost of lower throughput (500 kSPS). The AD7980ARMZRL7 is preferred where 16-bit resolution and a higher 1 MSPS throughput are sufficient.
Can the AD7980ARMZRL7 and AD7989-5BRMZ share the same reference and digital interface in a design?
They can share a reference and digital interface only if the reference voltage, supply levels, and timing are compatible with both devices. Because the AD7980ARMZRL7 uses a 2.5 V analog supply and the AD7989-5BRMZ uses a 5 V analog supply, the analog front end and reference must be designed to meet the requirements of each device separately; a common reference is not guaranteed to satisfy both without verification.