Part A
ADS7830IPWR
德州儀器
- Lifecycle
- Active
- Stock
- 1661 件
- Package
- TSSOP-16
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS7830IPWR and ADS7804UG4 are not functionally interchangeable. The ADS7830IPWR is an 8-bit, 8-channel SAR ADC with an I2C interface in a TSSOP-16 package, while the ADS7804UG4 is a 12-bit, single-channel SAR ADC with a parallel interface in a SOIC-28 package. Differences in resolution, channel count, digital interface, and package footprint make direct substitution infeasible without redesign of the host interface, signal conditioning, and PCB layout.
Different resolution
Different channel count
Different digital interface
Different package footprint
Parts at a glance
Part B
ADS7804UG4
德州儀器
- Lifecycle
- Active
- Stock
- 4085 件
- Package
- SOIC-28
- Series
- 資料獲取-模數轉換器（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 | ADS7804UG4 | Why it matters |
|---|---|---|---|
| Resolution | 8 bit | 12 bit | Resolution determines the smallest analog voltage change the ADC can distinguish; a 12-bit part offers 16x finer quantization than an 8-bit part, so they are not functionally interchangeable in precision applications. |
| Number of Input Channels | 8 (single-ended, multiplexed) | 1 (single-ended) | Channel count defines how many analog signals can be measured; the 8-channel multiplexed input of the ADS7830 supports multi-signal monitoring, while the ADS7804 handles only one channel. |
| Sampling Rate | 70 kSPS | 100 kSPS | Maximum sampling rate limits the bandwidth of signals that can be digitized; the ADS7804 can sample faster, which matters for higher-frequency or time-critical acquisition. |
| Interface Type | I2C (2-wire serial) | Parallel (byte/word) | The digital interface must match the host controller; I2C uses fewer pins and supports bus sharing, while a parallel interface requires more I/O lines and different firmware. |
| Supply Voltage | 2.7 V to 5.5 V | 5 V (single supply) | Supply voltage compatibility determines whether the part can operate in a given system rail; the wide-range ADS7830 suits low-voltage designs, whereas the ADS7804 requires a 5 V rail. |
| Input Voltage Range | 0 V to VDD (single-ended) | 0 V to 5 V (single-ended) | The input range must cover the sensor or signal swing; the ADS7830 range tracks its supply, while the ADS7804 has a fixed 0–5 V range tied to its 5 V operation. |
| Package / Mounting | 16-TSSOP (surface mount) | 28-SOIC (surface mount) | Package footprint and pin count affect PCB layout and board space; the two parts are not drop-in compatible and require different land patterns. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment; both parts share the same industrial range, so thermal suitability is equivalent. |
| Reference Configuration | Internal reference (with external option) | Internal reference (with external option) | The reference sets the ADC's full-scale accuracy and stability; both offer internal references with external override, so reference architecture is comparable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS7830IPWR | ADS7804UG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 8 | 12 |
| 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 | -40°C ~ 85°C |
Frequently asked questions
What are the key architectural differences between the ADS7830IPWR and ADS7804UG4?
The ADS7830IPWR is an 8-bit, 8-channel successive-approximation register (SAR) analog-to-digital converter with an I2C-compatible serial interface, operating from a single 2.7 V to 5.5 V supply. The ADS7804UG4 is a 12-bit SAR ADC with a parallel byte-wide interface, featuring a 10 µs conversion time and an internal track-and-hold amplifier, operating from a single 5 V supply. The two devices differ in resolution (8-bit vs 12-bit), interface type (I2C vs parallel), channel count (8-channel multiplexed vs single-channel), and supply voltage range.
Can the ADS7830IPWR and ADS7804UG4 be used interchangeably in the same design?
No. The ADS7830IPWR is an 8-bit, 8-channel I2C device in a TSSOP-16 package, while the ADS7804UG4 is a 12-bit, single-channel parallel-interface device in a SOIC-28 package. They differ in resolution, interface protocol, pin count, package footprint, channel architecture, and supply requirements, so they are not pin-compatible or functionally interchangeable without a complete redesign.
What are the package and pin count differences between the ADS7830IPWR and ADS7804UG4?
The ADS7830IPWR is supplied in a 16-pin TSSOP package (PW suffix). The ADS7804UG4 is supplied in a 28-pin SOIC package (DW/U suffix). The difference in pin count and package footprint means the two devices require different PCB land patterns and cannot share the same board layout.
How do the sampling rates and conversion characteristics of the ADS7830IPWR and ADS7804UG4 compare?
The ADS7830IPWR supports a sampling rate of up to 70 kSPS with 8-bit resolution over an I2C interface. The ADS7804UG4 offers 12-bit resolution with a 10 µs conversion time, corresponding to a throughput of approximately 100 kSPS, using a parallel interface. The ADS7804UG4 provides higher resolution and faster throughput, while the ADS7830IPWR offers multi-channel capability in a smaller package.
What supply voltage and reference requirements apply to each device?
The ADS7830IPWR operates from a single supply of 2.7 V to 5.5 V and can use its supply voltage as the reference or an external reference on the VREF pin. The ADS7804UG4 operates from a single 5 V supply and uses an internal reference or an external reference, with a specified input range of ±10 V. Designs must account for these differing supply and reference configurations when selecting between the two parts.
Which device is better suited for multi-channel, space-constrained applications?
The ADS7830IPWR is better suited for multi-channel, space-constrained designs because it integrates an 8-channel input multiplexer into a 16-pin TSSOP package with a two-wire I2C interface, reducing pin count and board space. The ADS7804UG4 is a single-channel, 12-bit device in a 28-pin SOIC package with a parallel interface, making it more appropriate for higher-resolution, single-channel data acquisition where board space and pin count are less critical.
What interface differences should a system designer consider between the ADS7830IPWR and ADS7804UG4?
The ADS7830IPWR uses an I2C-compatible serial interface with a 7-bit address, requiring only two signal lines (SDA and SCL) and supporting multiple devices on the same bus. The ADS7804UG4 uses a parallel byte-wide interface with data bus and control lines, requiring more I/O pins from the host controller but offering higher data throughput. The choice depends on the host microcontroller's available peripherals and the required data rate.