Part A
AD9122BCPZRL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5326 ПКС
- Package
- LFCSP-72
- Series
- Сбор данных - цифровые в аналоговые преобразователи (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9122BCPZRL and AD9125BCPZRL are both dual-channel 16-bit current-steering DACs from the same Analog Devices family, sharing the LFCSP-72 package and 1.8 V/3.3 V supply architecture. The AD9125 offers a higher maximum update rate (1000 MSPS versus 1230 MSPS for the AD9122), making it a viable functional substitute in most applications where the AD9122 is specified, provided the system timing margin and interface configuration are validated against the higher sample-rate capability.
Resolution and Channel Count
High match
Package and Pinout
High match
Maximum Update Rate
Validation required
Digital Interface Compatibility
High match
Parts at a glance
Part B
AD9125BCPZRL
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 696 ПКС
- Package
- VFQFN-72
- Series
- Сбор данных - цифровые в аналоговые преобразователи (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 | AD9125BCPZRL | 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. |
| Maximum Update Rate | 1230 MSPS | 1000 MSPS | Higher update rate enables wider signal bandwidth and higher intermediate frequencies, affecting achievable output frequency range. |
| Number of DAC Channels | 2 | 2 | Dual channels support I/Q transmit architectures; matching channel count preserves system topology compatibility. |
| Digital Interface | LVDS (DDR) | LVDS (DDR) | Interface type determines FPGA/ASIC I/O compatibility and PCB routing requirements for the data bus. |
| On-chip Interpolation | 2x, 4x, 8x | 2x, 4x, 8x | Interpolation filters relax input data rate requirements and shape the output spectrum for easier analog filtering. |
| Digital Datapath Features | Complex NCO, digital gain, inverse sinc | Complex NCO, digital gain, inverse sinc | On-chip NCO and gain stages enable frequency upconversion and level control without external components. |
| Supply Voltage | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Matching supply rails allows reuse of the same power design and decoupling network. |
| Package | 72-lead LFCSP | 72-lead LFCSP | Identical package and pinout permit drop-in board replacement without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Same industrial temperature range ensures equivalent environmental qualification for the target application. |
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 | AD9122BCPZRL | AD9125BCPZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| 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 | LVDS - Parallel | 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 AD9125BCPZRL?
The AD9122BCPZRL is a dual 16-bit, 1230 MSPS TxDAC+ digital-to-analog converter, while the AD9125BCPZRL is a dual 16-bit, 1000 MSPS TxDAC+ DAC. Both are pin-compatible in a 72-lead LFCSP package and share the same serial peripheral interface and on-chip features, but the AD9122 offers a higher maximum update rate (1230 MSPS vs. 1000 MSPS) and correspondingly higher input data rate.
Are the AD9122BCPZRL and AD9125BCPZRL pin-compatible?
Yes. Both devices are offered in the same 72-lead LFCSP (CP-72-4) package with identical pin functions, allowing a common PCB footprint. However, designers must verify that the higher-speed AD9122 timing and power requirements are met when using either device on a shared layout.
What is the maximum DAC update rate for each device?
The AD9122BCPZRL supports a maximum DAC update rate of 1230 MSPS. The AD9125BCPZRL supports a maximum DAC update rate of 1000 MSPS. Both are dual-channel, 16-bit current-steering DACs.
Do both parts support the same digital interface and interpolation options?
Yes. Both the AD9122 and AD9125 integrate a dual-channel, 16-bit LVDS input interface, a serial peripheral interface for configuration, and digital interpolation filters (2x, 4x, 8x) with a numerically controlled oscillator for digital up-conversion. The AD9122 additionally supports a higher input data rate consistent with its higher maximum DAC update rate.
What are the typical power consumption figures for these DACs?
Both devices are specified for approximately 1.5 W total power dissipation at their maximum update rates with typical operating conditions, depending on configuration of interpolation, NCO, and output current. Designers should consult the respective datasheets for exact power supply current specifications across the 1.8 V and 3.3 V rails.
Can the AD9125BCPZRL be used as a drop-in replacement for the AD9122BCPZRL?
Because both parts share the same package and pinout, the AD9125 can physically populate the same footprint. However, it is not a direct functional drop-in replacement: the AD9125 has a lower maximum DAC update rate (1000 MSPS vs. 1230 MSPS), so system timing, clocking, and data-rate budgets must be revalidated against the AD9125 datasheet before substitution.
What are the common applications for the AD9122BCPZRL and AD9125BCPZRL?
Both DACs are intended for wideband communications systems, including cellular base station transmitters, broadband wireless access, cable modem termination systems, and digital predistortion loops. The AD9122's higher update rate suits wider instantaneous bandwidth requirements, while the AD9125 targets applications with data rates up to 1000 MSPS.