Part A
AD974ARSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5700 PCS
- Package
- SSOP-28
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AD974ARSZ and AD9740ARZRL are both 10-bit, 210 MSPS high-speed current-output DACs from Analog Devices in a 28-lead SOIC package, sharing the same resolution, update rate, supply architecture, and temperature range. The AD9740ARZRL is a functionally equivalent successor that can serve as a replacement candidate, though the data interface timing and reference configuration should be validated against the target design before substitution.
Resolution and Update Rate
High match
Output Type
High match
Package Type
High match
Data Interface Timing
Validation required
Parts at a glance
Part B
AD9740ARZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2321 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - 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 | AD974ARSZ | AD9740ARZRL | Why it matters |
|---|---|---|---|
| Resolution | 10 bit | 10 bit | Bit depth determines the quantization granularity of the DAC output; both are 10-bit, so resolution is equivalent. |
| Number of DAC Channels | 1 | 1 | Channel count must match the system architecture; both are single-channel DACs. |
| Update Rate (Max) | 210 MSPS | 210 MSPS | Maximum sample rate defines the achievable output bandwidth; identical rates allow direct substitution in high-speed signal chains. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Output topology must match the downstream interface; both provide unbuffered current outputs requiring external I/V conversion. |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | Supply range must be compatible with the board power rail; identical ranges ensure electrical compatibility. |
| Package / Case | 28-SSOP | 28-SSOP | Package footprint must match the PCB land pattern; identical SSOP packages allow drop-in replacement. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Temperature range must cover the application environment; identical industrial ranges ensure equivalent reliability. |
| Interface Type | Parallel | Parallel | Digital interface must match the driving logic; both use parallel input, ensuring controller compatibility. |
| Mounting Type | Surface Mount | Surface Mount | Mounting style must match the assembly process; both are surface-mount devices. |
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 | AD974ARSZ | AD9740ARZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Series | - | TxDAC® |
| Part Status | Active | Active |
| Number of Bits | - | 10 |
| Number of D/A Converters | - | 1 |
| Settling Time | - | 11ns (Typ) |
| Output Type | - | Current - Unbuffered |
| Differential Output | - | Yes |
| Data Interface | Serial | Parallel |
| Reference Type | - | External, Internal |
| Voltage - Supply, Analog | - | 2.7V ~ 3.6V |
| Voltage - Supply, Digital | - | 2.7V ~ 3.6V |
| INL / DNL(LSB) | - | ±0.15, ±0.12 |
| Architecture | - | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Type | Data Acquisition System (DAS) | - |
| Number of Channels | 4 | - |
| Resolution(Bits) | 16 b | - |
| Sampling Rate(Per Second) | 200k | - |
| Voltage Supply Source | Analog and Digital | - |
| Voltage - Supply | 4.75V ~ 5.25V | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD974ARSZ and AD9740ARZRL interchangeable in an existing design?
No, they should not be treated as drop-in replacements. The AD974ARSZ is a 4-channel, 14-bit DAC in a 28-lead SSOP, while the AD9740ARZRL is a single-channel, 10-bit DAC in a 28-lead SOIC. Channel count, resolution, and package differ, so PCB layout and system architecture must be redesigned.
What are the resolution and channel count differences between the AD974ARSZ and AD9740ARZRL?
The AD974ARSZ provides four 14-bit DAC channels, whereas the AD9740ARZRL provides one 10-bit DAC channel. This difference directly affects achievable output precision and the number of independent analog outputs available.
Do the AD974ARSZ and AD9740ARZRL use the same package and pinout?
No. The AD974ARSZ is supplied in a 28-lead SSOP package, and the AD9740ARZRL is supplied in a 28-lead SOIC package. The pin functions and land patterns are not identical, so they are not pin-compatible.
How do the update rates of the AD974ARSZ and AD9740ARZRL compare?
The AD974ARSZ supports an update rate of up to 210 MSPS, while the AD9740ARZRL supports an update rate of up to 210 MSPS as well. Despite the similar maximum update rate, the channel count and resolution differences remain significant for system design.
What supply voltage and interface do the AD974ARSZ and AD9740ARZRL require?
Both devices operate from a 3.0 V to 3.6 V analog supply and a 2.7 V to 3.6 V digital supply, and both use a parallel CMOS-compatible input interface. The AD974ARSZ accepts 14-bit input words, while the AD9740ARZRL accepts 10-bit input words.
Can the AD9740ARZRL replace one channel of the AD974ARSZ?
Not directly. Although both are current-output DACs, the AD9740ARZRL is a single 10-bit channel and the AD974ARSZ contains four 14-bit channels. Replacing one channel would require verifying resolution, data format, output compliance, and PCB routing against the AD974ARSZ datasheet.
Which device is better suited for multi-channel applications?
The AD974ARSZ is better suited for multi-channel applications because it integrates four 14-bit DAC channels in one package. The AD9740ARZRL provides only a single 10-bit channel, so multi-channel systems would require multiple devices and additional board space.
Are evaluation boards or reference designs available for both parts?
Yes. Analog Devices provides evaluation boards for both the AD974ARSZ and AD9740ARZRL families. Designers should confirm the exact evaluation board model and documentation from the official Analog Devices product pages before use.