Part A
ADS5474IPFP
Texas Instruments
- Lifecycle
- Active
- Stock
- 7275 PCS
- Package
- HTQFP-80
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS5400IPZPR can serve as a functional replacement candidate for the ADS5474IPFP in high-speed data acquisition designs, provided the system is validated for the differences in resolution, sampling rate, and power consumption. Both devices share a compatible 14-bit parallel LVDS interface and operate from a 5 V analog supply, but the ADS5400IPZPR offers a higher sampling rate at the cost of reduced resolution and increased power dissipation. Careful evaluation of the digital output timing and thermal budget is recommended before substitution.
Resolution
Validation required
Sampling Rate
Validation required
Output Interface
High match
Power Consumption
Validation required
Parts at a glance
Part B
ADS5400IPZPR
Texas Instruments
- Lifecycle
- Active
- Stock
- 8379 PCS
- Package
- TQFP-100
- 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 | ADS5474IPFP | ADS5400IPZPR | Why it matters |
|---|---|---|---|
| Resolution | 14 bit | 12 bit | Higher resolution provides finer quantization and better dynamic range; a 14-bit ADC offers 4x the code density of a 12-bit device, affecting SNR and measurement precision. |
| Sampling Rate | 400 MSPS | 1 GSPS | Maximum sample rate determines the input bandwidth and Nyquist zone the converter can support; the ADS5400 can digitize signals at more than twice the rate of the ADS5474. |
| Input Type | Differential | Differential | Differential inputs improve common-mode noise rejection and even-order harmonic performance; both parts share this architecture, easing analog front-end reuse. |
| Output Interface | Parallel LVDS | Parallel LVDS | The digital output format must match the receiving FPGA/ASIC; both use LVDS parallel outputs, but data width and clocking differ due to resolution and speed. |
| Supply Voltage | 3.3 V analog / 3.3 V digital | 3.3 V analog / 1.8 V digital | Supply rails must be available on the board; differing digital core voltages affect power sequencing, decoupling, and level-shifting requirements. |
| Power Consumption | Approximately 2.2 W | Approximately 3.2 W | Power dissipation drives thermal design, heatsinking, and supply sizing; the higher-speed ADS5400 consumes more power and requires more thermal management. |
| Package | 80-pin HTQFP (PFP) | 100-pin HTQFP (PZP) | Footprint and pin count must match the PCB layout; different packages require a board redesign and cannot be drop-in substituted. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range suitability is critical for harsh environments; both parts share the same range, so thermal envelope compatibility is maintained. |
| SNR (typical) | Approximately 69 dBFS | Approximately 59 dBFS | Signal-to-noise ratio defines usable dynamic range; the 14-bit ADS5474 delivers roughly 10 dB better SNR, which is significant for weak-signal detection. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS5474IPFP | ADS5400IPZPR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | 14 | 12 |
| Sampling Rate(Per Second) | 400M | 1G |
| Number of Inputs | 1 | 1 |
| 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 | 1 | 1 |
| Architecture | Pipelined | Pipelined |
| Reference Type | Internal | External, Internal |
| Voltage - Supply, Analog | 3.1V ~ 3.6V, 5V | 3.135V ~ 3.465V, 5V |
| Voltage - Supply, Digital | 3V ~ 3.6V | 3.135V ~ 3.465V |
| Features | - | Temperature Sensor |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS5474IPFP and ADS5400IPZPR?
The ADS5474IPFP is a 14-bit, 400-MSPS analog-to-digital converter in a 100-pin HTQFP package, while the ADS5400IPZPR is a 12-bit, 1-GSPS ADC in a 100-pin HTQFP package. The ADS5400 offers higher sample rate but lower resolution, whereas the ADS5474 provides higher resolution at a lower sample rate.
Are the ADS5474IPFP and ADS5400IPZPR pin-compatible?
No. Although both devices are housed in a 100-pin HTQFP package, they are different converter families with different pin functions and supply configurations. A direct drop-in replacement is not supported; the PCB layout and interface must be validated against each device's datasheet.
What is the maximum sample rate of each device?
The ADS5474IPFP supports a maximum sample rate of 400 MSPS, while the ADS5400IPZPR supports a maximum sample rate of 1 GSPS. The higher sampling rate of the ADS5400 makes it suitable for wider-bandwidth signal capture.
What resolution does each ADC provide?
The ADS5474IPFP provides 14-bit resolution, and the ADS5400IPZPR provides 12-bit resolution. The ADS5474 therefore offers finer quantization, while the ADS5400 trades resolution for higher sampling speed.
What output interface do these ADCs use?
Both the ADS5474IPFP and ADS5400IPZPR provide parallel LVDS-compatible output data interfaces. The exact output format, bit width, and timing must be confirmed from the respective manufacturer datasheets before designing the digital interface.
What are the typical applications for each device?
The ADS5474IPFP (14-bit, 400 MSPS) is typically used in applications requiring higher dynamic range such as medical imaging, test and measurement, and communications receivers. The ADS5400IPZPR (12-bit, 1 GSPS) is suited to wideband digitization such as radar, software-defined radio, and high-speed data acquisition.
Do both devices operate from the same supply voltages?
No. The ADS5474IPFP and ADS5400IPZPR belong to different converter families and have different recommended supply rails and power dissipation. Designers must consult each device's datasheet for the exact analog and digital supply voltages and decoupling requirements.