Part A
ADS7830IPWR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 1661 ПКС
- Package
- TSSOP-16
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADS7830IPWR and ADS7805UG4 are not drop-in replacements for one another. The ADS7830IPWR is an 8-bit, 8-channel SAR ADC with an I2C interface in a TSSOP-16 package, while the ADS7805UG4 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 board and firmware redesign.
Different resolution
Different channel count
Different digital interface
Different package footprint
Parts at a glance
Part B
ADS7805UG4
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3097 ПКС
- Package
- SOIC-28
- Series
- Сбор данных - аналогово-цифровые преобразователи (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 | ADS7805UG4 | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 16 bit | Resolution determines the smallest analog voltage change the ADC can distinguish; a 16-bit part offers far finer measurement granularity than an 8-bit part. |
| Number of Input Channels | 8 (single-ended, multiplexed) | 1 (single-ended) | Channel count defines how many analog signals can be measured; the ADS7830 supports multi-channel scanning while the ADS7805 handles a single input. |
| Architecture | SAR | SAR | Both use successive-approximation, but the differing resolution and speed characteristics affect achievable accuracy and throughput in a given application. |
| Sampling Rate | 70 kSPS | 100 kSPS | Maximum sample rate limits how fast varying signals can be digitized; the ADS7805 offers higher throughput. |
| Interface | I2C | Parallel | The digital interface must match the host system; I2C uses fewer pins while parallel offers faster data transfer, so these parts are not drop-in compatible. |
| Supply Voltage | 2.7 V to 5.5 V | 5 V (single supply) | Supply requirements determine power-rail compatibility; the ADS7830 is more flexible across low-voltage systems. |
| Input Voltage Range | 0 V to VDD (single-ended) | 0 V to 10 V (with internal reference) | The input range must cover the signal being measured; the ADS7805 accepts a wider bipolar-capable span suited to industrial signals. |
| Package | TSSOP-16 | SOIC-28 | Package footprint and pin count affect PCB layout and assembly; the two parts are not physically interchangeable. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Both cover the industrial temperature range, so environmental tolerance is comparable for typical applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7830IPWR | ADS7805UG4 |
|---|---|---|
| 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 ADS7805UG4?
The ADS7830IPWR is an 8-bit, 8-channel successive-approximation ADC with an I2C interface, housed in a TSSOP-16 package, operating from a 2.7 V to 5.5 V supply. The ADS7805UG4 is a 16-bit, single-channel successive-approximation ADC with a parallel interface, housed in a SOIC-28 package, operating from a 5 V supply. They differ in resolution, channel count, interface type, package, and supply requirements.
Can the ADS7830IPWR and ADS7805UG4 be used as direct substitutes for each other?
No. The two devices have incompatible resolutions (8-bit vs 16-bit), channel counts (8 vs 1), digital interfaces (I2C vs parallel), package footprints (TSSOP-16 vs SOIC-28), and supply voltage ranges. A direct substitution is not possible without a complete redesign of the surrounding circuitry and PCB layout.
What are the supply voltage requirements for each device?
The ADS7830IPWR operates from a single supply of 2.7 V to 5.5 V. The ADS7805UG4 operates from a 5 V supply. Designs must ensure the supply rail matches the respective device requirements.
How do the digital interfaces of the ADS7830IPWR and ADS7805UG4 differ?
The ADS7830IPWR uses an I2C-compatible serial interface, requiring only two signal lines (SDA and SCL) plus an address pin. The ADS7805UG4 uses a parallel interface with a full data bus and control lines (such as CS, R/C, and BYTE), requiring more microcontroller or FPGA I/O pins.
What are the resolution and channel count specifications for each ADC?
The ADS7830IPWR provides 8-bit resolution across 8 input channels (single-ended or differential pairs). The ADS7805UG4 provides 16-bit resolution on a single input channel. The choice depends on whether higher resolution or multi-channel sampling is required.
What package types are used by the ADS7830IPWR and ADS7805UG4?
The ADS7830IPWR is supplied in a TSSOP-16 package. The ADS7805UG4 is supplied in a SOIC-28 package. The different pin counts and footprints mean the two devices are not PCB-compatible.
Are the operating temperature ranges of the ADS7830IPWR and ADS7805UG4 the same?
Both devices are specified for the industrial temperature range of -40°C to +85°C, making them suitable for similar industrial environments. However, designers should confirm the exact grade and datasheet conditions for the specific application.
Which device is better suited for multi-channel data acquisition systems?
The ADS7830IPWR is better suited for multi-channel data acquisition because it integrates an 8-channel input multiplexer with 8-bit resolution and a compact I2C interface. The ADS7805UG4 is intended for single-channel applications requiring 16-bit precision.