Part A
AD9125BCPZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3542 PCS
- Package
- LFCSP-72
- Series
- Acquisição de dados - Convertedores digitais para analógicos (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9122BCPZRL and AD9125BCPZ are both dual-channel 16-bit current-steering DACs from the same Analog Devices family, sharing a 72-lead LFCSP package and a compatible serial control interface, so the AD9125BCPZ can serve as a functional replacement candidate for the AD9122BCPZRL in many designs. However, the two parts differ in maximum update rate and on-chip digital signal processing features, so the system clock plan and any interpolation or fine-tuning requirements must be validated before substitution.
Resolution and Channel Count
High match
Maximum Update Rate
Validation required
Package and Pin Configuration
High match
On-Chip Digital Signal Processing
Validation required
Parts at a glance
Part B
AD9122BCPZRL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5326 PCS
- Package
- LFCSP-72
- Series
- Acquisição de dados - Convertedores digitais para analógicos (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 | AD9122BCPZRL | AD9125BCPZ | Why it matters |
|---|---|---|---|
| Resolution (DAC Bits) | 16 | 16 | Both are 16-bit DACs, so quantization noise floor and dynamic range are comparable for signal synthesis. |
| Number of DAC Channels | 2 (dual) | 2 (dual) | Dual channels enable I/Q transmit architectures; matching channel count preserves system topology compatibility. |
| Maximum Update Rate | 1230 MSPS | 1000 MSPS | Higher update rate supports wider signal bandwidths and higher intermediate frequencies; the AD9122 offers more headroom. |
| Input Data Interface | LVDS (dual-port, DDR) | LVDS (dual-port, DDR) | Interface type determines FPGA/ASIC pin compatibility and data bus routing; identical LVDS interfaces ease drop-in substitution. |
| On-chip Interpolation | 2x, 4x, 8x | 2x, 4x, 8x | Interpolation filters relax input data rate requirements and shape the output spectrum; matching options preserve digital datapath design. |
| Digital Interface Supply | 1.8 V to 3.3 V | 1.8 V to 3.3 V | Supply voltage compatibility with the host logic determines whether level shifting is required on the digital bus. |
| Analog Supply Voltage | 3.13 V to 3.47 V | 3.13 V to 3.47 V | Analog supply range affects output swing and linearity; identical ranges allow reuse of the same power design. |
| Package | 72-lead LFCSP (10 x 10 mm) | 72-lead LFCSP (10 x 10 mm) | Package and footprint compatibility is essential for physical board-level substitution without PCB redesign. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range ensures reliable operation in harsh environments; matching ranges preserve application suitability. |
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 | AD9125BCPZ | AD9122BCPZRL |
|---|---|---|
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 2 | 2 |
| Settling Time | 20ns (Typ) | 20ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | Parallel | LVDS - Parallel |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.71V ~ 1.89V | 1.71V ~ 1.89V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±3.7, ±2.1 |
| Architecture | Current Source | Current Source |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9122BCPZRL and the AD9125BCPZ?
The AD9122BCPZRL is a dual 16-bit, 1230 MSPS TxDAC+ digital-to-analog converter, while the AD9125BCPZ is a dual 16-bit, 1000 MSPS TxDAC+ DAC. The AD9122 offers a higher maximum update rate (1230 MSPS vs 1000 MSPS) and a higher DAC output frequency capability, whereas both share the same 72-lead LFCSP package and dual 16-bit resolution architecture.
Are the AD9122BCPZRL and AD9125BCPZ pin-compatible?
Yes. Both devices are offered in the same 72-lead LFCSP (CP-72-4) package with a common pinout defined by Analog Devices for the TxDAC+ family, allowing board-level compatibility when the surrounding circuit is designed to accommodate both parts.
What is the maximum DAC update rate for each device?
The AD9122BCPZRL supports a maximum DAC update rate of 1230 MSPS, while the AD9125BCPZ supports a maximum update rate of 1000 MSPS. Both are dual 16-bit current-steering DACs intended for high-speed transmit signal chains.
Do both parts support the same digital interface?
Yes. Both the AD9122 and AD9125 use a dual-port LVDS input interface with on-chip FIFO and interpolation filters, and both are configured through a SPI-compatible serial control port, allowing similar digital back-end interfacing in a design.
Can the AD9125BCPZ be used as a drop-in replacement for the AD9122BCPZRL?
Not unconditionally. Although the package and pinout are shared, the AD9122 supports a higher maximum update rate (1230 MSPS) than the AD9125 (1000 MSPS). A replacement is only valid if the system clock, interpolation settings, and output frequency plan remain within the AD9125's 1000 MSPS limit and all datasheet parameters are re-verified.
What is the resolution and channel count of these converters?
Both the AD9122BCPZRL and AD9125BCPZ are dual-channel (two DAC outputs) 16-bit digital-to-analog converters, providing 16-bit resolution per channel for I/Q transmit architectures.
What is the difference in the ordering part number suffix "RL"?
The "RL" suffix on AD9122BCPZRL denotes tape-and-reel packaging from Analog Devices, whereas AD9125BCPZ is supplied in standard tray packaging. The silicon device itself is identical to the corresponding base part number; only the packaging format differs.