Part A
AD5664BRMZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4077 Stückzahl
- Package
- MSOP-10
- Series
- Data Acquisition von Digital to Analog Converters (DAC)
Replacement verdict
Not a drop-in replacement
The AD5664BRMZ and AD5660CRM-1 are not drop-in replacements for each other. The AD5664BRMZ is a quad 16-bit DAC in a 10-lead MSOP, while the AD5660CRM-1 is a single 16-bit DAC in an 8-lead MSOP. They differ in channel count, package footprint, pinout, and reference architecture, requiring a complete board redesign and firmware update for substitution.
Different channel count
Different footprint
Different pinout
Different reference architecture
Parts at a glance
Part B
AD5660CRM-1
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5151 Stückzahl
- Package
- TSSOP-8
- Series
- Data Acquisition von Digital to Analog Converters (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 | AD5664BRMZ | AD5660CRM-1 | Why it matters |
|---|---|---|---|
| Number of DAC Channels | 4 | 1 | Determines how many independent analog outputs are available; a 4-channel device cannot be replaced by a 1-channel device without redesigning the output stage. |
| Resolution | 16 bits | 16 bits | Both provide 16-bit resolution, so the achievable output precision and LSB size are equivalent. |
| Interface Type | SPI | SPI | Both use a serial SPI-compatible interface, allowing similar digital host connections. |
| Output Voltage Range | 0 V to VREF | 0 V to VREF | Both provide a unipolar output span set by the reference, so the analog output scaling behavior is comparable. |
| Reference Type | External | Internal | The AD5660CRM-1 includes an on-chip reference, while the AD5664BRMZ requires an external reference, affecting board complexity and accuracy budgeting. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Both operate over the same supply range, so power rail compatibility is maintained. |
| Package | 10-Lead MSOP | 8-Lead MSOP | Different pin counts and footprints prevent direct drop-in replacement without PCB layout changes. |
| INL (Integral Nonlinearity) | ±16 LSB max | ±16 LSB max | Both specify similar 16-bit linearity, so static accuracy performance is comparable. |
| Operating Temperature Range | -40 °C to +105 °C | -40 °C to +105 °C | Both support industrial temperature ranges, allowing use in similar environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD5664BRMZ | AD5660CRM-1 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | nanoDAC® | nanoDAC® |
| Part Status | Active | Obsolete |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 4 | 1 |
| Settling Time | 7µs | 10µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Differential Output | No | No |
| Data Interface | SPI, DSP | SPI, DSP |
| Reference Type | External | Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 2.7V ~ 3.3V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 2.7V ~ 3.3V |
| INL / DNL(LSB) | ±6, ±1 (Max) | ±16 (Max), ±1 (Max) |
| Architecture | String DAC | String DAC |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key architectural differences between the AD5664BRMZ and AD5660CRM-1?
The AD5664BRMZ is a quad-channel, 16-bit nanoDAC with a serial interface and an internal 2.5 V reference. The AD5660CRM-1 is a single-channel, 16-bit nanoDAC with a serial interface and an internal 2.5 V reference. The primary difference is channel count: the AD5664BRMZ provides four independent DAC outputs, while the AD5660CRM-1 provides one.
Are the AD5664BRMZ and AD5660CRM-1 pin-compatible?
No. The AD5664BRMZ is supplied in a 10-lead MSOP package, while the AD5660CRM-1 is supplied in an 8-lead MSOP package. They have different pin counts and pin functions, so they are not pin-compatible and cannot be used as drop-in replacements without PCB redesign.
Do both devices have the same resolution and integral nonlinearity (INL) specification?
Yes. Both the AD5664BRMZ and AD5660CRM-1 are 16-bit DACs. The AD5664BRMZ has a relative accuracy (INL) of ±16 LSB maximum. The AD5660CRM-1 has a relative accuracy (INL) of ±16 LSB maximum. Both specifications are valid over the operating temperature range as stated in the respective manufacturer datasheets.
What is the supply voltage range for each device?
The AD5664BRMZ operates from a single 2.7 V to 5.5 V supply. The AD5660CRM-1 also operates from a single 2.7 V to 5.5 V supply. Both devices include an internal 2.5 V reference, but they can also be configured to use an external reference.
Can the AD5664BRMZ and AD5660CRM-1 share the same SPI interface bus?
Yes, both devices use a standard SPI-compatible serial interface. The AD5664BRMZ supports clock rates up to 50 MHz, while the AD5660CRM-1 supports clock rates up to 30 MHz. They can share the same SCLK and DIN lines, but each requires a separate SYNC (chip select) line for independent operation.
What are the output voltage ranges available on each device?
Both the AD5664BRMZ and AD5660CRM-1 provide a full-scale output range of 0 V to VREF, where VREF is either the internal 2.5 V reference or an externally applied reference. The AD5660CRM-1 also offers a gain-of-two configuration option, providing a 0 V to 5 V output when using the internal 2.5 V reference. The AD5664BRMZ does not include this gain-of-two option.
Which device is better suited for multi-channel control loop applications?
The AD5664BRMZ is better suited for multi-channel control loop applications because it integrates four independent 16-bit DAC channels in a single 10-lead MSOP package, reducing board space and component count. The AD5660CRM-1 provides only one channel, so multiple devices would be required for multi-channel designs.
Do both devices support the same digital interface timing and power-on reset behavior?
Both devices feature a power-on reset circuit that ensures the DAC output powers up to zero scale or midscale, depending on the model option. However, the AD5664BRMZ has a maximum SCLK frequency of 50 MHz, while the AD5660CRM-1 has a maximum SCLK frequency of 30 MHz. Timing parameters such as data setup and hold times differ between the two datasheets and must be verified separately for each device.