Part A
ADS7830IPWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1661 Stückzahl
- Package
- TSSOP-16
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Not a drop-in replacement
The ADS7830IPWR and ADS7805UBG4 are not drop-in replacements for one another. The ADS7830IPWR is an 8-bit, 8-channel successive-approximation ADC with an I2C interface in a TSSOP-16 package, while the ADS7805UBG4 is a 16-bit, single-channel SAR ADC with a parallel interface in a SOIC-28 package. They differ in resolution, channel count, digital interface, and package footprint, so substituting one for the other requires a full redesign of the surrounding circuitry and layout.
Different resolution
Different channel count
Different digital interface
Different package footprint
Parts at a glance
Part B
ADS7805UBG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7798 Stückzahl
- Package
- SOIC-28
- 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 | ADS7830IPWR | ADS7805UBG4 | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 16 bit | Resolution determines the smallest measurable signal step; a 16-bit ADC provides far finer measurement granularity than an 8-bit device. |
| Number of Input Channels | 8 (single-ended, multiplexed) | 1 (single-ended) | Channel count defines how many analog signals can be sampled; the ADS7830 supports multi-channel scanning while the ADS7805 handles a single input. |
| Sampling Rate | 70 kSPS | 100 kSPS | Maximum sample rate limits the bandwidth of signals that can be digitized; the ADS7805 samples faster than the ADS7830. |
| Interface Type | I2C | Parallel | The digital interface must match the host controller; I2C uses fewer pins while parallel offers higher throughput and simpler timing. |
| Input Type | Single-ended | Single-ended | Input configuration affects how the analog source is connected; both devices accept single-ended signals in this comparison. |
| Supply Voltage | 2.7 V to 5.5 V | 5 V (single supply) | Supply range determines compatibility with the system power rail; the ADS7830 is more flexible across low-voltage rails. |
| Package | TSSOP-16 | SOIC-28 | Package footprint and pin count affect PCB layout and assembly; these parts are not drop-in compatible. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range indicates environmental suitability; both parts cover the same industrial temperature span. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7830IPWR | ADS7805UBG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 8 | 16 |
| Sampling Rate(Per Second) | 70k | 100k |
| Number of Inputs | 4, 8 | 1 |
| Input Type | Differential, Single Ended | Single Ended |
| Data Interface | I²C | Parallel |
| Configuration | MUX-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 | 2.7V ~ 3.6V, 5V | 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V | 5V |
| Operating Temperature | -40°C ~ 85°C | -25°C ~ 85°C |
Frequently asked questions
What are the primary differences between the ADS7830IPWR and the ADS7805UBG4?
The ADS7830IPWR is an 8-bit, 8-channel successive-approximation ADC with an I2C interface, housed in a TSSOP-16 package and specified over the industrial temperature range. The ADS7805UBG4 is a 16-bit, single-channel successive-approximation ADC with a parallel interface, housed in a SOIC-28 package and specified over the industrial temperature range. They differ in resolution, channel count, digital interface, package, and conversion architecture details.
Can the ADS7830IPWR and ADS7805UBG4 be used as direct substitutes for each other?
No. The two devices are not pin-compatible or functionally interchangeable. The ADS7830IPWR uses an I2C serial interface in a 16-pin TSSOP package, while the ADS7805UBG4 uses a parallel interface in a 28-pin SOIC package. Resolution (8-bit vs 16-bit), channel count (8 vs 1), and package footprint differ, so a direct substitution is not possible without a redesign.
What are the supply voltage requirements for each device?
The ADS7830IPWR operates from a single 2.7 V to 5.5 V supply. The ADS7805UBG4 operates from a +5 V analog supply and a +5 V digital supply, with a separate VREF input for the reference voltage. Designers should confirm exact supply and reference ranges against the respective manufacturer datasheets before finalizing the power design.
How do the digital interfaces of the ADS7830IPWR and ADS7805UBG4 differ?
The ADS7830IPWR provides an I2C-compatible two-wire serial interface, which reduces pin count and simplifies connection to microcontrollers. The ADS7805UBG4 provides a parallel digital output interface, which allows higher throughput but requires more I/O pins and a wider bus. The choice depends on system bus architecture and throughput requirements.
What are the package and pin-count differences between the two parts?
The ADS7830IPWR is supplied in a 16-pin TSSOP package. The ADS7805UBG4 is supplied in a 28-pin SOIC package. The different pin counts and footprints mean the PCB land patterns are not compatible, and layout changes are required when migrating between the two devices.
What are the resolution and channel-count differences between the ADS7830IPWR and ADS7805UBG4?
The ADS7830IPWR is an 8-bit ADC with 8 input channels, suitable for multi-channel, lower-resolution monitoring applications. The ADS7805UBG4 is a 16-bit ADC with a single input channel, suitable for higher-precision single-channel measurement applications. The resolution and channel count differences directly affect measurement accuracy and system architecture.
Are the ADS7830IPWR and ADS7805UBG4 specified over the same temperature range?
Both devices are specified over the industrial temperature range of -40 °C to +85 °C. Designers should still verify the exact temperature grade and operating conditions in the respective manufacturer datasheets, as performance parameters may vary across the range.
Which device is better suited for multi-channel, low-resolution monitoring versus high-precision single-channel measurement?
The ADS7830IPWR, with its 8-bit resolution and 8 input channels, is better suited for multi-channel, lower-resolution monitoring tasks such as system voltage or current sensing. The ADS7805UBG4, with its 16-bit resolution and single channel, is better suited for high-precision single-channel measurement applications. Selection should be based on required resolution, channel count, interface, and package constraints.