Part A
AD9268BCPZ-125
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3100 PCS
- Package
- VFQFN-64
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The AD9268BCPZ-125 and AD9262BCPZ are not drop-in replacements for one another. Although both are dual-channel 16-bit ADCs in a 64-lead LFCSP package, they differ fundamentally in architecture, sample rate, and input interface, so the AD9262BCPZ cannot be substituted directly for the AD9268BCPZ-125 without redesign and revalidation.
Different sample rate
Different input interface
Different converter architecture
Different output interface
Parts at a glance
Part B
AD9262BCPZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3731 PCS
- Package
- VFQFN-64
- 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 | AD9268BCPZ-125 | AD9262BCPZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 16 | Both are 16-bit ADCs, so quantization resolution is equivalent for signal-to-noise performance budgeting. |
| Sampling Rate (MSPS) | 125 | 160 | Maximum sample rate determines the usable input bandwidth and whether the part can meet a given Nyquist/oversampling requirement. |
| Architecture | Pipelined ADC | Continuous-time sigma-delta (CTSD) ADC | The converter architecture affects anti-alias filtering needs, latency, and the external front-end design, so they are not drop-in substitutes. |
| Input Type | Differential | Differential | Both accept differential inputs, allowing similar balun/amplifier front ends, though drive requirements differ by architecture. |
| Output Interface | Parallel CMOS/LVDS | Parallel CMOS/LVDS | Digital output format must match the receiving FPGA/ASIC interface; both offer similar parallel output options. |
| Supply Voltage (V) | 1.8 (analog/digital core) | 1.8 (analog/digital core) | Supply rail compatibility affects power delivery design and whether the board's existing regulators can be reused. |
| Package | 64-lead LFCSP | 64-lead LFCSP | Package and pinout determine PCB footprint compatibility; matching packages ease layout reuse but pin functions must still be verified. |
| SNR (dBFS, typical) | ~78 | ~85 | Signal-to-noise ratio sets the dynamic range; the CTSD part offers higher SNR, which can matter for high-dynamic-range receivers. |
| Application Focus | General-purpose high-speed data acquisition | Communications / baseband receivers | Intended application indicates whether the part's filtering, latency, and interface features fit the target system's signal chain. |
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 | AD9268BCPZ-125 | AD9262BCPZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 125M | 160M |
| Number of Inputs | 2 | 2 |
| Input Type | Differential | Differential |
| Data Interface | LVDS - Parallel, Parallel | Parallel |
| Configuration | S/H-ADC | ADC |
| Number of A/D Converters | 2 | 2 |
| Architecture | Pipelined | Sigma-Delta |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| Voltage - Supply, Digital | 1.7V ~ 1.9V | 1.7V ~ 1.9V |
| Features | Simultaneous Sampling | Simultaneous Sampling |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Ratio - S / H: ADC | 1:1 | - |
Frequently asked questions
What are the key architectural differences between the AD9268BCPZ-125 and the AD9262BCPZ?
The AD9268BCPZ-125 is a dual-channel, 16-bit, 125 MSPS analog-to-digital converter with an on-chip track-and-hold circuit and integrated voltage reference. The AD9262BCPZ is a dual-channel, 16-bit, 2.5 MSPS to 160 MSPS continuous-time sigma-delta ADC that integrates an on-chip clock multiplier and a digital decimation filter. The AD9268 uses a pipelined architecture, while the AD9262 employs a continuous-time sigma-delta architecture with integrated digital filtering.
Do the AD9268BCPZ-125 and AD9262BCPZ share the same package and pinout?
Both devices are offered in a 64-lead LFCSP (CP-64-4) package. However, the pin functions and internal signal routing differ because the AD9268 is a pipelined ADC with parallel LVDS/CMOS output data, while the AD9262 integrates a continuous-time sigma-delta modulator with a digital decimation filter and a different output interface. The pinouts are not pin-for-pin compatible, and each device must be designed according to its respective datasheet pin configuration.
What are the maximum sample rates of the AD9268BCPZ-125 and the AD9262BCPZ?
The AD9268BCPZ-125 has a maximum sample rate of 125 MSPS per channel. The AD9262BCPZ supports sample rates from 2.5 MSPS to 160 MSPS, with the maximum rate dependent on the selected decimation ratio and clock multiplier configuration as specified in the AD9262 datasheet.
How do the output interfaces of the AD9268BCPZ-125 and AD9262BCPZ differ?
The AD9268BCPZ-125 provides parallel LVDS or CMOS output data with a 16-bit output word per channel. The AD9262BCPZ provides a serial or parallel digital output after on-chip decimation filtering, with the output format and word length determined by the selected decimation ratio and filter configuration. The interface designs are therefore not interchangeable without reconfiguration.
Can the AD9268BCPZ-125 and AD9262BCPZ be used interchangeably in an existing design?
No. Although both are dual 16-bit ADCs in 64-lead LFCSP packages, they differ in conversion architecture, sample rate range, output interface, clocking requirements, and pin functions. A direct substitution is not supported; any replacement requires validation of the digital interface, clocking scheme, filter requirements, and PCB layout against the respective manufacturer datasheets.
What are the typical applications for the AD9268BCPZ-125 versus the AD9262BCPZ?
The AD9268BCPZ-125 is typically used in applications requiring high-speed, high-resolution sampling such as communications receivers, instrumentation, and radar systems. The AD9262BCPZ, with its continuous-time sigma-delta architecture and integrated decimation filter, is typically used in applications requiring high dynamic range and inherent anti-aliasing, such as cellular base station receivers and other signal-chain designs where digital filtering is advantageous.
Do both devices support the same supply voltages and clock input requirements?
Both devices operate from a 1.8 V analog supply and a 1.8 V to 3.3 V digital output supply, as specified in their respective datasheets. However, the clock input requirements differ: the AD9268BCPZ-125 requires an external sampling clock at the target sample rate, while the AD9262BCPZ integrates an on-chip clock multiplier and supports a lower-frequency reference clock that is multiplied internally. Designers must follow the clocking specifications in each datasheet.