Part A
ADS8320EB/2K5
Texas Instruments
- Lifecycle
- Active
- Stock
- 3123 Stückzahl
- Package
- VSSOP-8
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The ADS8321E/2K5G4 is a functionally compatible replacement candidate for the ADS8320EB/2K5, sharing the same 16-bit SAR architecture, SPI interface, and 8-pin VSSOP package. Designers should validate the higher sampling rate, supply voltage range, and reference configuration against the target application before substitution.
Resolution and Architecture
High match
Package and Pinout
High match
Supply Voltage Range
Validation required
Sampling Rate
Validation required
Parts at a glance
Part B
ADS8321E/2K5G4
Texas Instruments
- Lifecycle
- Active
- Stock
- 6926 Stückzahl
- Package
- TSSOP-8
- Series
- Datenerfassung mit Analog to Digital Converters (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 | ADS8321E/2K5G4 | Why it matters |
|---|---|---|---|
| Resolution | 16 bit | 16 bit | Both are 16-bit SAR ADCs, so resolution is identical and not a differentiator for substitutability. |
| Sampling Rate | 100 kSPS | 100 kSPS | Identical throughput means either part can meet the same acquisition timing requirements. |
| Input Type | Single-ended | Pseudo-differential | Input configuration affects how the signal source must be connected and whether common-mode rejection is available. |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Same supply range allows drop-in use across the same system power rails. |
| Interface | SPI (serial) | SPI (serial) | Identical serial interface simplifies firmware and host-controller compatibility. |
| Package | VSSOP-8 (MSOP-8) | VSSOP-8 (MSOP-8) | Same footprint and pinout enable direct PCB substitution without layout changes. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Matching temperature ratings ensure equivalent environmental robustness. |
| Reference Input | External | External | Both require an external reference, so the same reference circuit can be reused. |
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 | ADS8321E/2K5G4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Series | microPOWER™ | microPOWER™ |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 16 | 16 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Pseudo-Differential, Single Ended | Differential, Pseudo-Differential, Single Ended |
| 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 | 5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the ADS8320EB/2K5 and ADS8321E/2K5G4?
The ADS8320EB/2K5 is a 16-bit, 100-kSPS micropower sampling ADC with a pseudo-differential input, while the ADS8321E/2K5G4 is a 16-bit, 100-kSPS micropower sampling ADC with a true differential input. Both are pin-compatible in the same MSOP-8 package but differ in input configuration and specified performance parameters.
Are the ADS8320EB/2K5 and ADS8321E/2K5G4 pin-compatible?
Yes. Both devices are offered in an 8-pin MSOP (VSSOP) package with the same pinout, allowing them to share a common PCB footprint. However, the input signal configuration differs (pseudo-differential vs. true differential), so circuit design must be validated accordingly.
What is the resolution and sampling rate of these ADCs?
Both the ADS8320EB/2K5 and ADS8321E/2K5G4 are 16-bit successive-approximation register (SAR) analog-to-digital converters with a maximum sampling rate of 100 kSPS.
What supply voltage and power consumption do these devices require?
Both devices operate from a single 2.7 V to 5.5 V supply. The ADS8320 and ADS8321 are micropower SAR ADCs; typical power consumption at 100 kSPS and 5 V supply is on the order of a few milliwatts, with significantly lower consumption at reduced sampling rates due to automatic power-down between conversions.
What is the difference in input configuration between the two parts?
The ADS8320EB/2K5 features a pseudo-differential input, where the negative input is typically tied to a fixed reference or ground and the positive input is measured relative to it. The ADS8321E/2K5G4 features a true differential input, allowing both inputs to swing and rejecting common-mode signals, which is advantageous for noisy environments and low-level differential sensors.
What serial interface do these ADCs use?
Both devices use a standard SPI-compatible serial interface for communication with microcontrollers and DSPs, supporting direct connection to most serial ports without external glue logic.
Can the ADS8320EB/2K5 and ADS8321E/2K5G4 be used interchangeably in an existing design?
They are pin-compatible, but they are not functionally identical: the input configuration (pseudo-differential vs. true differential) and some specified performance parameters differ. A direct substitution should only be made after verifying that the input drive circuit, reference configuration, and timing requirements meet the datasheet specifications of the replacement part.
What are the operating temperature ranges for these devices?
Both the ADS8320 and ADS8321 families are specified for the industrial temperature range of -40°C to +85°C, making them suitable for industrial measurement and control applications.