Part A
AD7683BRMZRL7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6941 個数
- Package
- MSOP-8
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7683BRMZRL7 and AD7680ARM are both 16-bit successive-approximation ADCs in 8-lead MSOP packages with similar serial interface and supply requirements, making them a viable functional replacement candidate. However, the AD7683 offers a higher throughput rate of 100 kSPS versus 100 kSPS-class operation on the AD7680, and the two devices differ in their analog input configuration and reference architecture, so the replacement should be validated against the target application's sampling rate, input drive, and reference requirements before adoption.
Resolution
High match
Package Type
High match
Sampling Rate
Validation required
Analog Input Configuration
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7683BRMZRL7 | AD7680ARM | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Sampling Rate (max) | 100 kSPS | 100 kSPS | Identical throughput means either part can meet the same acquisition bandwidth requirements. |
| Architecture | SAR | SAR | Both use successive-approximation register architecture, giving similar latency and no pipeline delay. |
| Input Type | Pseudo-differential, single-ended | Single-ended | The AD7683 supports a pseudo-differential input that can reject common-mode noise, while the AD7680 is strictly single-ended; this affects signal-chain design and noise immunity. |
| Supply Voltage | 2.7 V to 5.5 V | 2.5 V to 5.5 V | The AD7680 can operate at a slightly lower minimum supply, which may matter in low-voltage systems. |
| Interface | SPI / QSPI / MICROWIRE / DSP compatible | SPI / QSPI / MICROWIRE / DSP compatible | Both offer the same serial interface options, so digital host compatibility is equivalent. |
| Package | 10-lead MSOP | 8-lead MSOP | Different pin counts and footprints mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both suit the same industrial environments. |
| Power Consumption (typical) | 4 mW at 5 V, 100 kSPS | 3.5 mW at 5 V, 100 kSPS | The AD7680 draws slightly less power, which can matter in battery-powered or thermally constrained designs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7683BRMZRL7 | AD7680ARM |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | PulSAR® | PulSAR® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential | Single Ended |
| 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 | Supply |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD7683BRMZRL7 and the AD7680ARM?
The AD7683BRMZRL7 is a 16-bit, 100 kSPS PulSAR analog-to-digital converter with a pseudo-differential input, SPI-compatible serial interface, and an external reference, supplied in a 10-lead MSOP. The AD7680ARM is a 16-bit, 100 kSPS successive-approximation ADC with a single-ended input, SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and an internal reference, supplied in an 8-lead MSOP. The primary differences are input configuration (pseudo-differential vs single-ended), reference architecture (external vs internal), and package pin count (10-lead vs 8-lead).
Are the AD7683BRMZRL7 and AD7680ARM pin-compatible?
No. The AD7683BRMZRL7 is packaged in a 10-lead MSOP, while the AD7680ARM is packaged in an 8-lead MSOP. The differing pin counts and pin functions mean the two devices are not drop-in pin-compatible and require different PCB land patterns.
Do both parts offer the same resolution and throughput?
Yes. Both the AD7683BRMZRL7 and the AD7680ARM are 16-bit successive-approximation ADCs specified for a maximum throughput of 100 kSPS, making them comparable in resolution and sampling rate for low-speed precision applications.
How do the reference requirements differ between the two devices?
The AD7683BRMZRL7 requires an external reference voltage applied to its REF pin, allowing the system designer to set the full-scale range. The AD7680ARM integrates an internal reference, reducing external component count. This difference affects accuracy budgeting, board space, and system cost.
What input configurations do the AD7683BRMZRL7 and AD7680ARM support?
The AD7683BRMZRL7 provides a pseudo-differential input structure, which allows rejection of common-mode signals between the IN+ and IN- inputs. The AD7680ARM provides a single-ended input referenced to ground. The choice depends on whether the signal source is single-ended or requires common-mode rejection.
Are the serial interfaces of the AD7683BRMZRL7 and AD7680ARM compatible with common digital hosts?
Both devices use SPI-compatible serial interfaces. The AD7683BRMZRL7 supports a 3-wire SPI interface, while the AD7680ARM is specified as compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. Both can interface with most microcontrollers and DSPs, but the host firmware and timing must be validated against each device's datasheet timing specifications.
Can the AD7680ARM be used as a direct replacement for the AD7683BRMZRL7 in an existing design?
No, not as a direct drop-in replacement. The differing package (8-lead vs 10-lead MSOP), input configuration (single-ended vs pseudo-differential), and reference architecture (internal vs external) require schematic, layout, and firmware changes. Any substitution must be validated against both manufacturer datasheets and the target design requirements.