Part A
ADS5402IZAY
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 5854 PCS
- Package
- NFBGA-196
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS5409IZAY is a pin-compatible functional upgrade candidate for the ADS5402IZAY, sharing the same 12-bit dual-channel architecture, 100-pin TQFP package, and DDR LVDS output interface. The primary differentiator is the higher maximum sample rate of the ADS5409, which requires careful validation of the clocking and output timing budget in the target design before substitution.
Resolution and Channel Count
High match
Package and Pinout
High match
Output Interface Type
High match
Maximum Sample Rate
Validation required
Parts at a glance
Part B
ADS5409IZAY
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 210 PCS
- Package
- LFBGA-196
- 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 | ADS5402IZAY | ADS5409IZAY | Why it matters |
|---|---|---|---|
| Resolution | 12 bit | 12 bit | Bit depth determines the quantization precision and achievable SNR of the ADC; identical resolution means comparable dynamic range. |
| Sampling Rate | 800 MSPS | 900 MSPS | Maximum sample rate defines the input bandwidth and data throughput the converter can support; a higher rate enables wider signal capture. |
| Number of Input Channels | 2 (dual) | 1 (single) | Channel count determines whether the device can digitize two simultaneous signals (e.g., I/Q) or only one, directly affecting system architecture. |
| Output Interface | DDR LVDS | DDR LVDS | The digital output format must match the receiving FPGA/ASIC interface; identical LVDS output allows reuse of the same capture logic. |
| Analog Input Type | Differential | Differential | Differential inputs improve common-mode rejection and distortion performance; matching input topology simplifies front-end design reuse. |
| 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; identical rails allow the same power tree to be used for either part. |
| Package | 196-ball BGA (ZAY) | 196-ball BGA (ZAY) | Package and footprint compatibility determines whether the parts are drop-in replacements on an existing PCB layout. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The industrial temperature range confirms suitability for harsh environments and must match the application's thermal requirements. |
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 | ADS5409IZAY |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 800M | 900M |
| 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 ADS5409IZAY analog-to-digital converters?
Both are dual-channel, 12-bit ADCs from Texas Instruments in a 100-pin HTQFP (PZP/ZAY) package, but they differ in maximum sampling rate and input bandwidth. The ADS5402IZAY is specified for a 500 MSPS maximum sample rate, while the ADS5409IZAY is specified for 800 MSPS. The ADS5409 also provides a higher analog input bandwidth to support the faster sampling rate. Designers should confirm the exact rate, bandwidth, and power figures against the respective TI datasheets before selecting between them.
Are the ADS5402IZAY and ADS5409IZAY pin-compatible and footprint-compatible?
Both devices are offered in the same 100-pin HTQFP package (ZAY suffix), so they share the same package outline and PCB land pattern. However, pin compatibility should not be assumed solely from the package; the pin functions and any differences in configuration, control, or supply pin assignments must be verified against the official TI pinout and datasheet for each part before layout or substitution.
Can the ADS5409IZAY be used as a drop-in replacement for the ADS5402IZAY?
Not without validation. Although both are 12-bit dual ADCs in the same 100-pin HTQFP package, the ADS5409IZAY supports a higher maximum sample rate (800 MSPS vs. 500 MSPS for the ADS5402IZAY) and has different analog input bandwidth and power characteristics. The system clock, input network, output interface timing, and thermal design must be re-verified against the ADS5409IZAY datasheet before any substitution.
What is the resolution and channel configuration of these ADCs?
Both the ADS5402IZAY and ADS5409IZAY are dual-channel (two independent ADC cores), 12-bit resolution analog-to-digital converters. Each channel provides 12-bit output data, and the devices are intended for high-speed signal acquisition applications such as communications, test and measurement, and radar.
What output interface do the ADS5402IZAY and ADS5409IZAY use?
Both devices provide a parallel LVDS-compatible output data interface, consistent with the TI ADS540x family architecture. The exact output format, bit mapping, and timing (including DDR or SDR behavior) should be confirmed from the respective TI datasheet, since output timing scales with the sample rate and differs between the 500 MSPS and 800 MSPS variants.
How do the power consumption figures compare between the two parts?
Power consumption differs because the ADS5409IZAY operates at a higher maximum sample rate (800 MSPS) than the ADS5402IZAY (500 MSPS). The exact total power dissipation for each device depends on sample rate, supply voltages, and operating mode, and must be taken from the official TI datasheet electrical characteristics tables rather than assumed. Thermal and supply design should be based on the verified datasheet values for the specific part.
What package and operating temperature range do these devices support?
Both the ADS5402IZAY and ADS5409IZAY are supplied in a 100-pin HTQFP (ZAY) package. The industrial temperature range and package thermal characteristics should be confirmed from the TI datasheet for each specific orderable part number, as the "I" suffix denotes the industrial grade variant. Designers should verify the exact operating temperature limits and thermal resistance values from the manufacturer documentation.