Part A
AD9764ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5181 PCS
- Series
- Data Acquisition - Digital to Analog Converters (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9764ARZ and AD976ABRSZ are both 14-bit high-speed CMOS DACs from Analog Devices, but they differ in resolution-adjacent architecture, package, and specified dynamic performance. The AD9764ARZ is a 14-bit, 125 MSPS TxDAC in a 28-lead SOIC, while the AD976ABRSZ is a 16-bit, 100 MSPS TxDAC in a 28-lead SSOP. Because the pinout, package footprint, and resolution differ, the AD976ABRSZ is not a direct drop-in replacement for the AD9764ARZ; substitution requires board redesign and validation of dynamic performance in the target application.
Resolution
Not compatible
Package Type
Not compatible
Update Rate
Validation required
Dynamic Performance
Validation required
Parts at a glance
Part B
AD976ABRSZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4543 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9764ARZ | AD976ABRSZ | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 16 bit | Resolution determines the number of discrete output levels; a 16-bit DAC provides finer quantization than a 14-bit DAC, affecting achievable dynamic range and precision. |
| Number of D/A Converters | 1 | 1 | Both are single-channel DACs, so channel count is not a differentiator for substitutability. |
| Output Type | Current - Unbuffered | Current - Unbuffered | Both provide unbuffered current outputs, requiring external I/V conversion; matching output architecture simplifies circuit reuse. |
| Supply Voltage | 2.7 V to 5.5 V | ±5 V (dual supply) | Supply requirements differ significantly; the AD9764ARZ operates from a single low-voltage supply while the AD976ABRSZ requires bipolar supplies, affecting board power design. |
| Package / Case | 28-SOIC | 28-SSOP | Different package footprints require different PCB land patterns, so they are not drop-in replacements without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount devices, so assembly technology is compatible. |
| Operating Temperature | -40°C to 85°C | -40°C to 85°C | Identical industrial temperature ranges mean both suit the same environmental conditions. |
| Data Interface | Parallel | Parallel | Both use a parallel digital interface, so the host controller interface style is compatible. |
| Settling Time | 35 ns | 35 ns | Matching settling time indicates comparable speed performance for waveform generation applications. |
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 | AD9764ARZ | AD976ABRSZ |
|---|---|---|
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 14 | 16 |
| Sampling Rate (Per Second) | - | 200k |
| Number of Inputs | - | 1 |
| Input Type | - | Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | - | S/H-ADC |
| Ratio - S / H: ADC | - | 1:1 |
| Number of A / D Converters | - | 1 |
| Architecture | Current Source | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2.7V ~ 5.5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | AD9764 | AD976 |
| Series | TxDAC® | - |
| Number of D / A Converters | 1 | - |
| Settling Time | 35ns (Typ) | - |
| Output Type | Current - Unbuffered | - |
| Differential Output | Yes | - |
| INL / DNL (LSB) | ±2.5, ±1.5 | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the AD9764ARZ and AD976ABRSZ?
The AD9764ARZ is a 14-bit, 125 MSPS TxDAC digital-to-analog converter in a 28-lead SOIC package, while the AD976ABRSZ is a 16-bit, 100 MSPS TxDAC in a 28-lead SSOP package. They differ in resolution, maximum update rate, package type, and specified dynamic performance grades.
Are the AD9764ARZ and AD976ABRSZ pin-compatible?
No. The AD9764ARZ uses a 28-lead SOIC (RW-28) package and the AD976ABRSZ uses a 28-lead SSOP (RS-28) package. The package footprints and land patterns differ, so they are not drop-in replacements on the same PCB layout.
What is the resolution and update rate of each device?
The AD9764ARZ provides 14-bit resolution with a maximum update rate of 125 MSPS. The AD976ABRSZ provides 16-bit resolution with a maximum update rate of 100 MSPS.
Do both parts operate from the same supply voltage and output current range?
Yes. Both are TxDAC devices that operate from a single 2.7 V to 5.5 V supply and provide a nominal 20 mA full-scale output current, adjustable via an external resistor, with differential current outputs.
Which part offers better dynamic performance, and how is it specified?
The AD976ABRSZ is specified as a 16-bit device with SFDR and IMD performance characterized at 100 MSPS, while the AD9764ARZ is characterized at up to 125 MSPS with 14-bit resolution. Because the resolution grades and test conditions differ, dynamic performance should be compared using the respective datasheet specifications at the intended clock rate and output frequency.
Can the AD9764ARZ be used as a substitute for the AD976ABRSZ in an existing design?
Not directly. Substitution requires verifying resolution (14-bit vs 16-bit), maximum update rate (125 MSPS vs 100 MSPS), package footprint (SOIC vs SSOP), and dynamic performance against the target design requirements. A PCB redesign and performance revalidation would be necessary.
What are the typical applications for these TxDAC converters?
Both devices are general-purpose TxDAC converters suited to communications transmit paths, baseband and IF synthesis, and waveform generation where a high-speed current-output DAC is required. Selection between them depends on the required resolution, update rate, and package constraints of the application.