Part A
ADS7807U
Texas Instruments
- Lifecycle
- Active
- Stock
- 7038 PCS
- Package
- SOIC-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7807U and ADS7800JU/1K are both 12-bit successive-approximation ADCs offering comparable resolution and parallel output architecture, making the ADS7807U a viable functional candidate for the ADS7800JU/1K in many designs. However, the two devices differ in package footprint, analog input range, and supply configuration, so board-level validation is required before committing to a drop-in substitution.
Resolution
High match
Output Interface
High match
Package Type
Validation required
Analog Input Range
Validation required
Parts at a glance
Part B
ADS7800JU/1K
Texas Instruments
- Lifecycle
- Active
- Stock
- 4118 PCS
- Package
- SOIC-24
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | ADS7807U | ADS7800JU/1K | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 12 bit | Resolution determines the smallest analog increment the ADC can distinguish; a 16-bit part offers 16x finer quantization than a 12-bit part, so they are not functionally interchangeable in precision applications. |
| Sampling Rate | 40 kSPS | 333 kSPS | Maximum throughput dictates the highest signal bandwidth that can be digitized; the ADS7800 supports much faster sampling, which matters for dynamic or multiplexed acquisition systems. |
| Input Type | Single-ended | Single-ended | Input configuration affects how the sensor or signal source must be connected; both are single-ended, so wiring topology is compatible. |
| Interface | Parallel (byte/word) | Parallel | The digital interface must match the host bus; both provide parallel output, but the ADS7807 offers byte-selectable word widths that can simplify 8-bit microcontroller interfacing. |
| Supply Voltage | 5 V | 5 V | Supply voltage must match the system rail; both operate from a single 5 V supply, so power architecture is compatible. |
| Reference | Internal | Internal | An internal reference simplifies the design by removing an external reference component; both include on-chip references, aiding drop-in substitution. |
| Package | 28-pin SOIC | 24-pin SOIC | Package footprint and pin count determine board layout compatibility; differing pin counts mean the parts are not footprint-compatible and require layout changes. |
| Operating Temperature Range | -40 to +85 °C | -40 to +85 °C | The temperature range defines the environments in which the part is guaranteed to meet specifications; matching industrial ranges support use in similar application conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7807U | ADS7800JU/1K |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 16 | 12 |
| Sampling Rate(Per Second) | 40k | 333k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, 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 | SAR | SAR |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 5V | 5V, -11.4V ~ 16.5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS7807U and the ADS7800JU/1K?
The ADS7807U is a 16-bit successive-approximation ADC, while the ADS7800JU/1K is a 12-bit successive-approximation ADC. The ADS7807U offers higher resolution (16-bit vs 12-bit) and is specified for a different package and speed grade, so they are not pin-for-pin or functionally interchangeable without design validation.
Do the ADS7807U and ADS7800JU/1K have the same resolution and sampling rate?
No. The ADS7807U provides 16-bit resolution, whereas the ADS7800JU/1K provides 12-bit resolution. Sampling rates and timing specifications also differ between the two devices, so each must be evaluated against its own datasheet for the target application.
Are the ADS7807U and ADS7800JU/1K available in the same package?
No. The ADS7807U is offered in a 28-pin SOIC package, while the ADS7800JU/1K is offered in a 24-pin SOIC package. The different pin counts and pinouts prevent a direct drop-in replacement.
Can the ADS7807U be used as a direct replacement for the ADS7800JU/1K?
No. Because the two devices differ in resolution (16-bit vs 12-bit), package (28-pin vs 24-pin SOIC), and pinout, a direct substitution is not possible. Any replacement requires schematic, layout, and firmware validation against the respective manufacturer datasheets.
What are the input voltage ranges of the ADS7807U and ADS7800JU/1K?
Both devices support bipolar input ranges, but the exact specified ranges and reference configurations differ. Designers should confirm the input span and reference requirements from the official Texas Instruments datasheets for each part before selecting one for a given signal chain.
Which part is better suited for high-accuracy measurement applications?
The ADS7807U is generally better suited for high-accuracy measurement because it provides 16-bit resolution compared with the 12-bit resolution of the ADS7800JU/1K. The final choice should also account for sampling rate, interface timing, and system noise requirements verified from the datasheets.
Do both parts use the same digital interface?
Both are successive-approximation ADCs with parallel digital outputs, but the data bus width and control signal timing differ due to their different resolutions and pin counts. The interface must be verified against each device's datasheet before reuse in an existing design.