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 AD5686BRUZ-RL7 are both quad-channel, 16-bit nanoDAC+ voltage-output DACs from Analog Devices in the same 16-lead TSSOP package, sharing an SPI interface, internal 2.5 V reference, and 2.7 V to 5.5 V supply range. The AD5686BRUZ-RL7 offers a higher SPI clock rate and adds a RESET pin, so it can serve as a functional replacement for the AD5684RBRUZ in most designs, provided the system firmware accounts for the additional reset control and the higher serial clock capability. Designers should verify timing margins, reset pin handling, and reference configuration before committing to the substitution.
Resolution and Channel Count
High match
Package and Pin Configuration
High match
Supply Voltage and Reference
High match
Digital Interface and Control Pins
Validation required
Parts at a glance
Part B
AD5686BRUZ-RL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6759 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 | AD5686BRUZ-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. |
| Integrated Reference | Yes, 2.5 V | No | An internal reference simplifies design and improves accuracy by eliminating the need for an external reference source. |
| Interface Type | SPI | SPI | The serial interface determines compatibility with the host microcontroller or FPGA. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | The supply range must match the system power rails for proper operation. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Defines the usable analog output span, which must align with the target application requirements. |
| Package Type | TSSOP-16 | TSSOP-16 | 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 ensures reliable operation in the intended environment. |
| INL (Integral Nonlinearity) | ±1 LSB | ±4 LSB | INL indicates the maximum deviation from an ideal transfer function, directly impacting accuracy. |
| Power Consumption | 2.5 mW at 3 V | 3.5 mW at 3 V | Power consumption is critical for portable and low-power embedded 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 | AD5684RBRUZ | AD5686BRUZ-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 |
| Reference Type | External, Internal | External |
| 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) | ±2, ±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 AD5686BRUZ-RL7?
The AD5684RBRUZ is a quad-channel, 12-bit nanoDAC+ with an internal 2.5 V reference, while the AD5686BRUZ-RL7 is a quad-channel, 16-bit nanoDAC+ with an internal 2.5 V reference. The primary difference is resolution: 12-bit versus 16-bit. Both are offered in a 16-lead TSSOP package and share the same serial interface and reference architecture.
Are the AD5684RBRUZ and AD5686BRUZ-RL7 pin-compatible?
Yes. Both devices are specified in the same 16-lead TSSOP (RU-16) package and share the same pinout, including the SPI interface, reference pins, and DAC outputs. This allows a common PCB footprint, but the higher resolution of the AD5686BRUZ-RL7 may require verification of timing, settling, and noise performance in the target design.
What is the resolution and channel count of each device?
The AD5684RBRUZ provides four 12-bit voltage-output DAC channels. The AD5686BRUZ-RL7 provides four 16-bit voltage-output DAC channels. Both are members of the AD568xR family of quad nanoDAC+ converters with an on-chip reference.
Do both devices include an internal reference, and what is its value?
Yes. Both the AD5684RBRUZ and AD5686BRUZ-RL7 integrate a 2.5 V internal reference. The internal reference is factory trimmed and can be used to set the DAC output span; an external reference can also be applied if the application requires a different full-scale range.
What serial interface do the AD5684RBRUZ and AD5686BRUZ-RL7 use?
Both devices use a 3-wire or 4-wire SPI-compatible serial interface. The interface supports clock rates up to 50 MHz and includes a dedicated SYNC/CS pin, SCLK, and SDIN, with SDO available for daisy-chain or readback operation. This is consistent with the AD568xR data sheet specifications.
Can the AD5684RBRUZ be replaced by the AD5686BRUZ-RL7 in an existing design?
Pin-compatible replacement is possible because both use the same 16-lead TSSOP package and pinout. However, the AD5686BRUZ-RL7 offers 16-bit resolution versus 12-bit, so the system must be validated for updated transfer function, settling time, noise, and linearity. Firmware may also require adjustment because the digital input code scaling differs between 12-bit and 16-bit devices.
What are the supply voltage and operating temperature ranges for these DACs?
Both the AD5684RBRUZ and AD5686BRUZ-RL7 operate from a single 2.7 V to 5.5 V supply and are specified over the industrial temperature range of −40°C to +105°C. These parameters are documented in the respective Analog Devices data sheets for the AD5684R and AD5686R families.
What is the difference in INL and DNL performance between the two devices?
The AD5684RBRUZ (12-bit) offers relative accuracy (INL) of ±1 LSB maximum and differential nonlinearity (DNL) of ±1 LSB maximum. The AD5686BRUZ-RL7 (16-bit) offers INL of ±4 LSB maximum and DNL of ±1 LSB maximum. These values are resolution-dependent and are specified in the respective manufacturer data sheets.