Part A
ADS5402IZAY
Texas Instruments
- Lifecycle
- Active
- Stock
- 5854 PCS
- Package
- NFBGA-196
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS5403IZAYR is a viable functional replacement candidate for the ADS5402IZAY, sharing the same 12-bit resolution, dual-channel architecture, 500 MSPS sampling rate, and 100-pin TQFP package. Designers should validate the reduced input bandwidth and lower power consumption against their specific signal-chain requirements before finalizing the substitution.
Resolution and Channel Count
High match
Sampling Rate
High match
Analog Input Bandwidth
Validation required
Package and Pinout
High match
Parts at a glance
Part B
ADS5403IZAYR
Texas Instruments
- Lifecycle
- Active
- Stock
- 7862 PCS
- Package
- LFBGA-196
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS5403IZAYR | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Bit depth determines the quantization precision and achievable SNR of the ADC; both parts match here. |
| Sampling Rate | 800 MSPS | 500 MSPS | Maximum sample rate defines the input bandwidth and Nyquist zone the converter can support; the ADS5402 runs faster. |
| Number of Input Channels | 2 (dual) | 1 (single) | Channel count determines whether one device can digitize two signals simultaneously or requires two parts. |
| Output Interface | DDR LVDS | DDR LVDS | The digital output format must match the FPGA/ASIC receiver; both use parallel DDR LVDS. |
| Analog Input Type | Differential | Differential | Differential inputs improve common-mode rejection and dynamic performance; both are differential. |
| 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 share the same rail requirements. |
| Package | 100-pin TQFP (ZAY) | 100-pin TQFP (ZAY) | Package and pinout affect PCB footprint and layout compatibility; both use the same ZAY package. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature range ensures operation in harsh environments; both are rated identically. |
| Power Consumption (typical) | ~1.4 W | ~1.0 W | Power dissipation affects thermal design and supply sizing; the higher-rate ADS5402 consumes more. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS5402IZAY | ADS5403IZAYR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 800M | 500M |
| Number of Inputs | 2 | 1 |
| Input Type | Differential | Differential |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 2 | 1 |
| 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 |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Features | Simultaneous Sampling | - |
Frequently asked questions
What are the key differences between the ADS5402IZAY and ADS5403IZAYR?
Both are dual-channel 12-bit analog-to-digital converters from Texas Instruments in a 100-pin NFBGA (ZAY) package. The ADS5402IZAY is specified for a 500 MSPS maximum sample rate, while the ADS5403IZAYR is specified for 800 MSPS. The ADS5403IZAYR is supplied in tape-and-reel packaging (R suffix), whereas the ADS5402IZAY is supplied in tray packaging. Both use the same core architecture and interface, but the higher sample rate of the ADS5403 affects input bandwidth, clocking requirements, and power consumption.
Are the ADS5402IZAY and ADS5403IZAYR pin-compatible?
Yes. Both devices are offered in the same 100-pin NFBGA (ZAY) package with the same pinout, which allows a common PCB footprint. However, pin compatibility does not guarantee functional interchangeability; the higher sample rate of the ADS5403IZAYR imposes tighter clock, input, and power delivery requirements that must be validated in the target design.
What is the maximum sample rate of each device?
The ADS5402IZAY supports a maximum sample rate of 500 MSPS per channel. The ADS5403IZAYR supports a maximum sample rate of 800 MSPS per channel. Both are dual-channel 12-bit converters, so the aggregate throughput differs accordingly.
Do both converters use the same digital output interface?
Yes. Both the ADS5402IZAY and ADS5403IZAYR provide a DDR LVDS output interface with 12-bit resolution per channel. The interface format is common across the family, but the maximum output data rate scales with the sample rate, so the receiving FPGA or ASIC must be capable of capturing the higher rate when using the ADS5403IZAYR.
How does power consumption compare between the two parts?
Power consumption scales with sample rate. The ADS5403IZAYR, operating at up to 800 MSPS, dissipates more power than the ADS5402IZAY at up to 500 MSPS. Designers should consult the respective datasheets for the exact total power figures at the intended operating conditions and provide adequate thermal management for the higher-rate device.
Can the ADS5403IZAYR be used as a drop-in replacement for the ADS5402IZAY?
Because both share the same package and pinout, the ADS5403IZAYR can physically populate the same footprint. However, it is not a drop-in replacement without validation: the higher sample rate requires a faster clock source, adequate input bandwidth, sufficient FPGA capture capability, and a power/thermal budget that supports the increased dissipation. The design must be verified against the ADS5403IZAYR datasheet before substitution.
What packaging options distinguish the ADS5402IZAY from the ADS5403IZAYR?
The ADS5402IZAY is supplied in tray packaging. The ADS5403IZAYR carries the "R" suffix indicating tape-and-reel packaging, which is typically used for automated high-volume assembly. Both use the same 100-pin NFBGA (ZAY) package body.
What input signal characteristics should be considered when comparing these ADCs?
Both devices are 12-bit dual ADCs with similar analog input architectures, but the ADS5403IZAYR's higher 800 MSPS rate places greater demands on the analog front end. The input bandwidth, sampling clock jitter, and drive circuitry must be evaluated against the ADS5403IZAYR datasheet to preserve dynamic performance (SNR, SFDR) at the higher sample rate, whereas the ADS5402IZAY at 500 MSPS has more relaxed front-end requirements.