Part A
ADS5400IPZP
德州儀器
- Lifecycle
- Active
- Stock
- 7717 件
- Package
- HTQFP-100
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS5474IPFPR and ADS5400IPZP are both high-speed analog-to-digital converters, but they differ fundamentally in resolution, sampling rate, package, and power architecture, so neither device can serve as a direct drop-in substitute for the other. A replacement would require full board-level redesign and validation.
Different resolution
Different sampling rate
Different package
Different power architecture
Parts at a glance
Part B
ADS5474IPFPR
德州儀器
- Lifecycle
- Active
- Stock
- 7616 件
- Package
- HTQFP-80
- Series
- 資料獲取-模數轉換器（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 | ADS5474IPFPR | ADS5400IPZP | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Higher resolution provides finer quantization and better dynamic range, which directly affects achievable SNR and measurement accuracy. |
| Sampling Rate | 400 MSPS | 1 GSPS | Maximum sample rate determines the input bandwidth that can be captured and is critical for high-frequency signal acquisition. |
| Input Type | Differential | Differential | Differential inputs improve common-mode noise rejection and even-order harmonic performance in high-speed signal chains. |
| Output Interface | Parallel LVDS | Parallel LVDS | The digital output format must match the receiving FPGA/ASIC interface for direct compatibility without glue logic. |
| Supply Voltage | 3.3 V analog / 3.3 V digital | 3.3 V analog / 1.8 V digital | Supply rail requirements affect board power design and level-shifting needs when substituting one part for another. |
| Package | 80-pin HTQFP (PFB) | 100-pin HTQFP (PZP) | Different package footprints and pin counts prevent drop-in replacement and require PCB redesign. |
| Power Consumption | Approx. 1.9 W | Approx. 2.7 W | Power dissipation impacts thermal design, supply sizing, and overall system efficiency. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation across harsh environments and matches application requirements. |
| SNR (typical) | Approx. 69.5 dBFS | Approx. 59.5 dBFS | Signal-to-noise ratio determines the effective dynamic range and sensitivity of the acquisition system. |
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 | ADS5400IPZP | ADS5474IPFPR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 12 | 14 |
| Sampling Rate(Per Second) | 1G | 400M |
| Number of Inputs | 1 | 1 |
| Input Type | Differential | Differential |
| Data Interface | LVDS - Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | Pipelined | Pipelined |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 3.135V ~ 3.465V, 5V | 3.1V ~ 3.6V, 5V |
| Voltage - Supply, Digital | 3.135V ~ 3.465V | 3V ~ 3.6V |
| Features | Temperature Sensor | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS5474IPFPR and ADS5400IPZP?
The ADS5474IPFPR is a 14-bit, 400-MSPS analog-to-digital converter in a 100-pin HTQFP (PFP) package, while the ADS5400IPZP is a 12-bit, 1-GSPS ADC in a 100-pin HTQFP (PZP) package. The ADS5400 offers higher sample rate but lower resolution, whereas the ADS5474 provides higher resolution at a lower sample rate.
Are the ADS5474IPFPR and ADS5400IPZP pin-compatible?
No. Although both devices are housed in 100-pin HTQFP packages, the ADS5474IPFPR uses the PFP package designation and the ADS5400IPZP uses the PZP package designation. Pin assignments and functions differ between the two devices, so they are not drop-in replacements and require separate PCB layouts.
What are the resolution and sample rate specifications of each device?
The ADS5474IPFPR provides 14-bit resolution at a maximum sample rate of 400 MSPS. The ADS5400IPZP provides 12-bit resolution at a maximum sample rate of 1 GSPS. Selection depends on whether the application prioritizes dynamic range (ADS5474) or sampling bandwidth (ADS5400).
What input interface and output format do these ADCs use?
Both devices accept differential analog inputs and provide parallel LVDS-compatible digital output data. The ADS5474IPFPR outputs 14-bit parallel data, while the ADS5400IPZP outputs 12-bit parallel data. Designers should confirm timing and output bit-width requirements against the respective datasheets.
Do both converters operate from the same supply voltages?
Both devices use a 3.3 V analog supply and a 1.8 V digital supply, consistent with their families' datasheet specifications. However, exact current consumption and power dissipation differ between the two parts, so thermal and decoupling designs must be verified per device datasheet.
Can the ADS5400IPZP be used as a direct replacement for the ADS5474IPFPR in an existing design?
No. The devices differ in resolution (12-bit vs 14-bit), maximum sample rate (1 GSPS vs 400 MSPS), package pinout (PZP vs PFP), and output data width. A direct substitution would require PCB redesign, FPGA/interface reconfiguration, and revalidation of the analog front end.
Which device is better suited for high-resolution instrumentation versus high-speed digitizers?
The ADS5474IPFPR, with 14-bit resolution, is generally better suited for high-resolution instrumentation and applications requiring finer quantization. The ADS5400IPZP, with 1-GSPS sampling, is better suited for high-speed digitizers, wideband receivers, and applications prioritizing sampling bandwidth over resolution.