Part A
ADS5402IZAY
Texas Instruments
- Lifecycle
- Active
- Stock
- 5854 Stückzahl
- Package
- NFBGA-196
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS5404IZAYR is a viable functional replacement candidate for the ADS5402IZAY, sharing the same 12-bit dual-channel architecture, 800 MSPS maximum sample rate, DDR LVDS output interface, and 100-pin TQFP package footprint. Designers should validate power consumption, full-scale input range, and thermal performance against the target application before committing to a drop-in substitution.
Resolution and Channel Count
High match
Sample Rate
High match
Output Interface
High match
Power Consumption
Validation required
Parts at a glance
Part B
ADS5404IZAYR
Texas Instruments
- Lifecycle
- Active
- Stock
- 5198 Stückzahl
- Package
- LFBGA-196
- Series
- Datenerfassung mit 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 | ADS5402IZAY | ADS5404IZAYR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Bit depth determines the quantization precision and achievable SNR of the ADC; both are 12-bit so resolution is equivalent. |
| Sampling Rate | 800 MSPS | 500 MSPS | Maximum sample rate defines the input bandwidth and Nyquist zone the converter can support; the ADS5402 runs faster than the ADS5404. |
| Number of Input Channels | 2 (dual) | 2 (dual) | Channel count determines how many independent signals can be digitized simultaneously; both are dual-channel devices. |
| Output Interface | LVDS (DDR) | LVDS (DDR) | The digital output format must match the receiving FPGA/ASIC interface; both use parallel LVDS DDR outputs. |
| Analog Input Type | Differential | Differential | Differential inputs improve common-mode rejection and distortion performance; both devices use differential analog inputs. |
| Supply Voltage | 1.8 V (analog/digital), 3.3 V (I/O) | 1.8 V (analog/digital), 3.3 V (I/O) | Supply rails must match the board power design; both parts share the same 1.8 V core and 3.3 V I/O requirements. |
| Package | 196-ball BGA (ZAY) | 196-ball BGA (ZAY) | Package and footprint must be compatible for drop-in substitution; both use the same 196-ball ZAY BGA. |
| Power Consumption (typical) | Higher (800 MSPS operation) | Lower (500 MSPS operation) | Power dissipation affects thermal design and supply sizing; the faster ADS5402 typically consumes more power than the ADS5404. |
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 | ADS5402IZAY | ADS5404IZAYR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 800M | 500M |
| Number of Inputs | 2 | 2 |
| Input Type | Differential | Differential |
| Data Interface | Parallel | LVDS - Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 2 | 2 |
| Architecture | Pipelined | Pipelined |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 1.7V ~ 1.9V, 3.15V ~ 3.45V | 1.7V ~ 1.9V, 3.15V ~ 3.45V |
| 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 |
Frequently asked questions
What are the key differences between the ADS5402IZAY and ADS5404IZAYR?
The ADS5402IZAY is a dual-channel 12-bit analog-to-digital converter sampling at up to 800 MSPS, while the ADS5404IZAYR is a dual-channel 12-bit ADC sampling at up to 500 MSPS. Both are pin-compatible members of the same Texas Instruments ADS540x family and share the same 196-ball NFBGA (ZAY) package, but they differ in maximum sample rate, power consumption, and some dynamic performance specifications.
Are the ADS5402IZAY and ADS5404IZAYR pin-compatible and package-compatible?
Yes. Both devices are offered in the same 196-ball NFBGA (ZAY) package with identical pinouts as part of the TI ADS540x pin-compatible family, allowing a common PCB footprint. However, designers must still verify that the maximum sample rate, power, and dynamic performance differences meet the target application requirements before substituting one for the other.
What is the maximum sampling rate of each device?
The ADS5402IZAY supports a maximum sample rate of 800 MSPS per channel, whereas the ADS5404IZAYR supports a maximum sample rate of 500 MSPS per channel. Both are dual-channel, 12-bit converters, so the primary selection criterion between them is often the required sampling bandwidth.
Do both converters have the same resolution and number of channels?
Yes. Both the ADS5402IZAY and ADS5404IZAYR are dual-channel, 12-bit analog-to-digital converters. The resolution and channel count are identical; the differences lie in maximum sample rate, power consumption, and certain AC performance parameters.
What digital output interface do these ADCs use?
Both devices provide a DDR LVDS (double data rate low-voltage differential signaling) output interface for the digitized data, consistent with the TI ADS540x family architecture. This enables high-speed data capture by FPGAs and DSPs with LVDS-compatible receivers.
How does power consumption compare between the ADS5402IZAY and ADS5404IZAYR?
Because the ADS5402IZAY operates at a higher maximum sample rate (800 MSPS) than the ADS5404IZAYR (500 MSPS), it typically dissipates more power at its maximum rate. Designers should consult the respective TI datasheets for the exact total power figures at the intended operating sample rate, since power scales with clock frequency.
Can the ADS5404IZAYR be used as a drop-in replacement for the ADS5402IZAY in an existing design?
Physical drop-in compatibility is supported by the shared 196-ball NFBGA (ZAY) package and pinout, but functional substitution requires validation. The ADS5404IZAYR has a lower maximum sample rate (500 MSPS vs. 800 MSPS), so it cannot be clocked at the higher rate supported by the ADS5402IZAY. The system clock, FPGA capture logic, and timing budget must be re-verified against the ADS5404IZAYR datasheet before substitution.
What are typical applications for these dual 12-bit high-speed ADCs?
These converters are suited to high-speed signal acquisition applications such as wideband communications receivers, radar and electronic warfare systems, test and measurement instrumentation, and high-speed data acquisition systems. The ADS5402IZAY's higher 800 MSPS rate suits wider-bandwidth front ends, while the ADS5404IZAYR's 500 MSPS rate fits applications with lower bandwidth requirements and potentially lower power budgets.