Part A
AD5684RBRUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4245 PCS
- Package
- SOP-16
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD5684RBRUZ and AD5686RBRUZ-RL7 are both quad-channel, 16-bit nanoDAC+ devices with integrated 2.5 V reference and SPI interfaces in identical 16-lead TSSOP packages, making them strong functional replacement candidates. The primary distinction is the AD5686R's additional internal reference gain and offset capabilities, which may require validation depending on the target application's output range requirements.
Resolution
High match
Channel Count
High match
Package Type
High match
Reference Architecture
Validation required
Parts at a glance
Part B
AD5686RBRUZ-RL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6736 PCS
- Package
- TSSOP-16
- Series
- Acquisition de données - convertisseur numérique - analogique (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD5684RBRUZ | AD5686RBRUZ-RL7 | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 4 | 4 | Channel count determines how many independent analog outputs the device can drive in a system. |
| Resolution | 12 bits | 16 bits | Higher resolution provides finer output voltage steps, which is critical for precision control applications. |
| INL (Integral Nonlinearity) | ±1 LSB max | ±4 LSB max | INL defines the maximum deviation from an ideal transfer function, directly affecting accuracy. |
| DNL (Differential Nonlinearity) | ±1 LSB max | ±1 LSB max | DNL guarantees monotonicity and step-size accuracy, which is essential for closed-loop control. |
| Reference Type | Internal 2.5 V | Internal 2.5 V | An internal reference simplifies design and improves stability by eliminating external reference components. |
| Output Voltage Range | 0 V to VREF (2.5 V) | 0 V to VREF (2.5 V) | The output span must match the input range of the downstream circuit for proper signal scaling. |
| Interface | SPI | SPI | The serial interface must be compatible with the host controller for communication and configuration. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Supply range determines compatibility with the system power rail and ensures proper operation. |
| Package | 16-Lead TSSOP | 16-Lead TSSOP | Package type affects PCB footprint, thermal performance, and assembly compatibility. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | The temperature range must cover the application environment to ensure reliable operation. |
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 | AD5684RBRUZ | AD5686RBRUZ-RL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | nanoDAC+® | nanoDAC+® |
| Part Status | Active | Active |
| Number of Bits | 12 | 16 |
| Number of D/A Converters | 4 | 4 |
| Settling Time | 7µs | 8µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | SPI, DSP |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| INL / DNL(LSB) | ±0.12, ±1 (Max) | ±1, ±1 (Max) |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key differences between the AD5684RBRUZ and AD5686RBRUZ-RL7?
The AD5684RBRUZ is a quad-channel, 12-bit nanoDAC+ with an internal 2.5 V reference, while the AD5686RBRUZ-RL7 is a quad-channel, 16-bit nanoDAC+ with the same internal 2.5 V reference. The primary differences are resolution (12-bit vs 16-bit), INL/DNL performance, and the ordering format: the AD5686RBRUZ-RL7 is supplied in a 7-inch reel with 1,000 pieces per reel, whereas the AD5684RBRUZ is typically supplied in tray or tube packaging.
Are the AD5684RBRUZ and AD5686RBRUZ-RL7 pin-compatible?
Yes. Both devices are offered in the same 16-lead TSSOP (RU-16) package and share an identical pinout, including the SPI interface, reference pins, and DAC output pins. This allows a common PCB footprint, but firmware and resolution-dependent specifications must be updated when migrating between them.
What is the resolution and channel count of each device?
The AD5684RBRUZ provides four voltage-output DAC channels with 12-bit resolution. The AD5686RBRUZ-RL7 provides four voltage-output DAC channels with 16-bit resolution. Both integrate a 2.5 V internal reference and operate from a single 2.7 V to 5.5 V supply.
What serial interface do these DACs use?
Both devices use a 3-wire or 4-wire SPI-compatible serial interface supporting clock rates up to 50 MHz. They also include a SDO pin for daisy-chain and readback operation, and a LDAC pin for simultaneous updating of all DAC outputs.
What are the reference and output voltage ranges for these parts?
Both devices include an internal 2.5 V reference with a typical initial accuracy of ±2 mV and a temperature coefficient of 2 ppm/°C typical. The output amplifier gain is selectable as 1 or 2, giving an output span of 0 V to VREF or 0 V to 2×VREF. With the internal 2.5 V reference, the full-scale output is 2.5 V (gain = 1) or 5 V (gain = 2). An external reference can also be applied.
What are the INL and DNL specifications for each device?
The AD5684RBRUZ (12-bit) has a typical INL of ±0.5 LSB and a maximum INL of ±1 LSB, with DNL specified at ±1 LSB maximum. The AD5686RBRUZ-RL7 (16-bit) has a typical INL of ±2 LSB and a maximum INL of ±16 LSB, with DNL specified at ±1 LSB maximum. These values are per the manufacturer datasheets and should be verified against the latest revision.
What are the operating temperature range and package details?
Both devices are specified over the industrial temperature range of −40°C to +105°C and are housed in a 16-lead TSSOP package. The AD5684RBRUZ is identified by the RU-16 package code, and the AD5686RBRUZ-RL7 uses the same RU-16 package but is delivered in a 7-inch reel with 1,000 units per reel.
Can the AD5684RBRUZ be used as a drop-in replacement for the AD5686RBRUZ-RL7?
No, not as a direct drop-in replacement. Although they are pin-compatible and share the same package and interface, the AD5684RBRUZ has 12-bit resolution while the AD5686RBRUZ-RL7 has 16-bit resolution. System firmware, calibration data, and any resolution-dependent signal-chain calculations must be updated. The AD5686RBRUZ-RL7 also has tighter absolute accuracy requirements in some applications due to its higher resolution.
What are the typical applications for these DACs?
Both devices are used in process control, programmable logic controllers, industrial automation, data acquisition systems, and digital gain and offset adjustment. The AD5686RBRUZ-RL7 is preferred in applications requiring higher resolution, such as precision instrumentation and closed-loop control, while the AD5684RBRUZ is suitable for cost-sensitive designs where 12-bit resolution is sufficient.