Part A
ADS8320EB/2K5
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 3123 PCS
- Package
- VSSOP-8
- Series
- 데이터 수집 - 아날로그 변환기(ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8320EB/2K5 and ADS8318IBDGSTG4 are both 16-bit successive-approximation ADCs with single-channel pseudo-differential inputs, making them functionally comparable for many precision data-acquisition designs. However, they differ in sampling rate, supply voltage range, and package footprint, so the ADS8318IBDGSTG4 can serve as a functional replacement candidate only after validating timing, voltage rails, and board layout against the original ADS8320EB/2K5 requirements.
Resolution
High match
Sampling Rate
Validation required
Supply Voltage Range
Validation required
Package Type
Not compatible
Parts at a glance
Part B
ADS8318IBDGSTG4
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 9660 PCS
- Package
- MSOP-10
- Series
- 데이터 수집 - 아날로그 변환기(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 | ADS8320EB/2K5 | ADS8318IBDGSTG4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is equivalent and not a differentiator for substitutability. |
| Sampling Rate | 100 kSPS | 500 kSPS | The ADS8318 offers 5x higher throughput, which matters for faster signal acquisition and higher-bandwidth applications. |
| Input Type | Single-ended | Pseudo-differential | Pseudo-differential input improves rejection of common-mode noise and ground offsets, affecting signal integrity in noisy environments. |
| Supply Voltage | 2.7 V to 5.5 V | 4.5 V to 5.5 V | The wider supply range of the ADS8320 allows operation at lower voltages, which is important for low-power or 3.3 V systems. |
| Interface | SPI | SPI | Both use SPI, so the digital host interface is compatible and does not constrain substitution. |
| Package | VSSOP-8 | VSSOP-10 | Different pin counts and footprints mean the PCB layout must be redesigned; they are not drop-in replacements. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature ratings mean both suit the same industrial operating environments. |
| Reference Type | External | External | Both require an external reference, so the reference design approach is the same for either part. |
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 | ADS8320EB/2K5 | ADS8318IBDGSTG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 500k |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential, Single Ended | Differential |
| Data Interface | SPI | 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 | External |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.3V, 5V | 2.375V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADS8320EB/2K5 and the ADS8318IBDGSTG4?
The ADS8320EB/2K5 is a 16-bit, 100-kSPS successive-approximation register (SAR) analog-to-digital converter with a pseudo-differential input and an SPI-compatible serial interface, supplied in an 8-pin VSSOP package. The ADS8318IBDGSTG4 is a 16-bit, 500-kSPS SAR ADC with a fully differential input, an SPI-compatible serial interface, and an internal reference buffer, supplied in a 10-pin VSSOP package. The ADS8318 offers a higher throughput rate and fully differential input architecture, while the ADS8320 provides a lower sample rate in a smaller pin count package.
Can the ADS8320EB/2K5 and ADS8318IBDGSTG4 be used as direct drop-in replacements for each other?
No. The two devices differ in package pin count (8-pin vs 10-pin VSSOP), pin functions, input architecture (pseudo-differential vs fully differential), maximum sample rate (100 kSPS vs 500 kSPS), and reference configuration. A direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
How do the maximum sampling rates of the ADS8320EB/2K5 and ADS8318IBDGSTG4 compare?
The ADS8320EB/2K5 supports a maximum throughput of 100 kSPS, while the ADS8318IBDGSTG4 supports a maximum throughput of 500 kSPS. The ADS8318 therefore provides five times the maximum sample rate of the ADS8320, which is relevant for higher-bandwidth signal acquisition applications.
What input configurations do the ADS8320EB/2K5 and ADS8318IBDGSTG4 support?
The ADS8320EB/2K5 features a pseudo-differential input, where the negative input is typically tied to a fixed reference or ground potential. The ADS8318IBDGSTG4 features a fully differential input, allowing both inputs to swing symmetrically around a common-mode voltage, which improves rejection of common-mode noise and even-order harmonics.
Do the ADS8320EB/2K5 and ADS8318IBDGSTG4 use the same serial interface?
Both devices use an SPI-compatible serial interface for communication with a host controller. However, the exact frame format, timing, and register or command structure should be verified against each device's datasheet, as the two parts are not register-compatible and cannot share identical firmware without modification.
How do the package and pin count of the ADS8320EB/2K5 and ADS8318IBDGSTG4 differ?
The ADS8320EB/2K5 is offered in an 8-pin VSSOP package, while the ADS8318IBDGSTG4 is offered in a 10-pin VSSOP package. The different pin counts and pin assignments mean the PCB land patterns are not interchangeable, and layout must be redesigned when migrating between the two devices.
Which device is better suited for higher-throughput data acquisition systems?
The ADS8318IBDGSTG4 is better suited for higher-throughput systems because its 500-kSPS maximum sample rate exceeds the 100-kSPS rate of the ADS8320EB/2K5. For lower-speed, space-constrained designs, the ADS8320EB/2K5 may be preferable due to its smaller 8-pin package.