Part A
ADS7807U
Texas Instruments
- Lifecycle
- Active
- Stock
- 7038 PCS
- Package
- SOIC-28
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS7813U/1K is a strong functional replacement candidate for the ADS7807U, sharing the same 16-bit SAR architecture, 5 V supply, and pin-compatible 28-pin SOIC footprint. Designers should validate the tighter ±0.5 LSB INL grade and the faster 40 kSPS throughput against their specific accuracy and timing budgets before committing to production.
Resolution and Architecture
High match
Package and Pinout
High match
Accuracy Grade
Validation required
Sampling Rate
Validation required
Parts at a glance
Part B
ADS7813U/1K
Texas Instruments
- Lifecycle
- Active
- Stock
- 2270 PCS
- Package
- SOIC-16
- 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 | ADS7807U | ADS7813U/1K | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit ADCs, so resolution is identical and not a differentiator for substitutability. |
| Sampling Rate | 40 kSPS | 40 kSPS | Identical maximum throughput means either part can handle the same signal bandwidth requirements. |
| Input Type | Single-ended | Single-ended | Both accept single-ended analog inputs, so the same front-end signal conditioning can be reused. |
| Input Voltage Range | ±10 V | ±10 V | Matching bipolar input range allows the same sensor or signal chain to interface directly without re-scaling. |
| Supply Voltage | 5 V | 5 V | Same single 5 V supply simplifies power design and allows drop-in replacement in existing rails. |
| Interface | Parallel | Serial (SPI/QSPI) | Different digital interfaces require different host connections and firmware, so they are not pin/software compatible. |
| Package | 28-SOIC | 28-SOIC | Same package footprint enables board-level interchangeability without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical industrial temperature range means both suit the same environmental conditions. |
| Reference | Internal | Internal | Both include an internal reference, reducing external component count and simplifying design. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7807U | ADS7813U/1K |
|---|---|---|
| Supplier | - | Texas Instruments,Rochester Electronics, LLC |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 40k | 40k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | SPI, Parallel | SPI |
| 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 | External, Internal |
| Voltage - Supply, Analog | 5V | 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 ADS7813U/1K?
Both are 16-bit successive-approximation analog-to-digital converters from Texas Instruments in a 28-pin SOIC package, but they differ in sampling rate and input range. The ADS7807U offers a 40 kSPS throughput with a 0 V to 5 V unipolar input range (or ±10 V bipolar depending on configuration), while the ADS7813U/1K provides a 500 kSPS throughput with a ±10 V bipolar input range. The ADS7813U/1K is supplied in a 1,000-piece tape-and-reel (the "/1K" suffix), whereas the ADS7807U is typically ordered in tube quantities.
Are the ADS7807U and ADS7813U/1K pin-compatible?
No. Although both devices are housed in a 28-pin SOIC (DW) package, their pin functions and internal architectures differ, so they are not drop-in replacements. The ADS7807U and ADS7813U/1K have different pinouts and control-signal assignments; a PCB designed for one cannot accept the other without layout changes. Designers must consult the respective datasheets before considering any substitution.
What is the maximum sampling rate of each device?
The ADS7807U has a maximum throughput of 40 kSPS. The ADS7813U/1K has a maximum throughput of 500 kSPS. The higher sampling rate of the ADS7813U/1K makes it suitable for faster signal acquisition, while the ADS7807U targets lower-speed, precision applications.
What input voltage ranges do these ADCs support?
The ADS7807U supports a 0 V to 5 V unipolar input range and a ±10 V bipolar input range, selectable via configuration. The ADS7813U/1K supports a ±10 V bipolar input range. Both devices integrate a successive-approximation register (SAR) architecture with an internal sample-and-hold and reference, allowing direct connection to a wide range of analog sources.
Do both parts use the same digital interface?
Both devices provide a parallel digital output interface for connection to a microprocessor or DSP, but the control-signal timing and pin assignments differ between the ADS7807U and ADS7813U/1K. The ADS7813U/1K supports a faster conversion cycle consistent with its 500 kSPS rating, so interface timing must be validated against each device's datasheet. They are not interchangeable at the interface level without design review.
What package and ordering options are available?
Both the ADS7807U and ADS7813U/1K are offered in a 28-pin SOIC (DW) package. The ADS7807U is typically supplied in tube quantities, while the ADS7813U/1K is supplied in a 1,000-piece tape-and-reel, indicated by the "/1K" suffix. Buyers should confirm the exact ordering code and packaging with the distributor or manufacturer before purchase.
Can the ADS7807U be used as a substitute for the ADS7813U/1K in an existing design?
No, not as a direct substitute. The two devices differ in sampling rate (40 kSPS vs 500 kSPS), input range configuration, pinout, and interface timing. A design targeting the ADS7813U/1K at 500 kSPS cannot be satisfied by the ADS7807U, and the differing pin functions prevent a drop-in replacement. Any substitution requires full validation against the manufacturer datasheets and a PCB redesign where pinouts differ.
Which device is better suited for high-speed data acquisition?
The ADS7813U/1K is better suited for high-speed data acquisition because its 500 kSPS throughput is more than ten times that of the ADS7807U (40 kSPS). For lower-speed, high-precision measurements where 40 kSPS is sufficient, the ADS7807U may be adequate. Selection should be based on the required sampling rate, input range, and interface compatibility verified from the datasheets.