Part A
ADS1247IPWR
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3449 ПКС
- Package
- TSSOP-20
- Series
- Сбор данных - аналогово-цифровые преобразователи (ADC)
Replacement verdict
Not a drop-in replacement
The ADS1247IPWR and ADS1230IPWG4 are both 24-bit delta-sigma ADCs, but they differ fundamentally in resolution architecture, input channel count, interface type, and package footprint. The ADS1247IPWR offers a 4-channel differential multiplexer with SPI and integrated PGA, while the ADS1230IPWG4 is a single-channel bridge-sensor ADC with a two-wire serial interface in a smaller TSSOP package. These differences in channel count, digital interface, and footprint prevent direct board-level substitution without redesign.
Different channel count
Different digital interface
Different package footprint
Different input architecture
Parts at a glance
Part B
ADS1230IPWG4
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6107 ПКС
- Package
- TSSOP-16
- 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 | ADS1247IPWR | ADS1230IPWG4 | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 20 | Higher resolution allows detection of smaller signal changes; a 24-bit ADC provides finer measurement granularity than a 20-bit device. |
| Number of input channels | 4 (differential/2 differential + 2 single-ended configurable) | 1 (differential) | Channel count determines how many sensors or signal sources can be connected; the ADS1247 supports multi-channel systems while the ADS1230 is limited to a single differential input. |
| Interface type | SPI | SPI (2-wire, read-only) | Interface compatibility affects microcontroller connection and firmware; the ADS1230 uses a simplified read-only serial interface while the ADS1247 offers full SPI configurability. |
| PGA / gain stages | Yes (PGA, gains 1 to 128) | Yes (gain 1 or 128) | Programmable gain allows amplification of low-level sensor signals; the ADS1247 offers a wider range of gain settings for flexible signal scaling. |
| Data rate (SPS) | Up to 2000 SPS | 10 or 80 SPS | Higher sample rates enable faster measurements; the ADS1247 supports much higher throughput, while the ADS1230 targets slow, high-precision weigh-scale applications. |
| Supply voltage (analog) | 2.7 V to 5.25 V | 2.7 V to 5.3 V | Supply range determines compatibility with the system power rail; both are similar but the ADS1230 tolerates a slightly higher maximum analog supply. |
| Internal oscillator | Yes (internal oscillator) | Yes (internal oscillator, no external clock required) | An internal oscillator simplifies design by eliminating external clock components; both devices integrate one, aiding standalone operation. |
| Package | TSSOP-20 | TSSOP-16 | Package footprint affects PCB layout and assembly; the different pin counts and body sizes mean the two parts are not drop-in footprint compatible. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +85 °C | Temperature range affects suitability for harsh environments; the ADS1247 supports a wider upper temperature limit for industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1247IPWR | ADS1230IPWG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Number of Bits | 24 | 20 |
| Sampling Rate(Per Second) | 2k | 80 |
| Number of Inputs | 2, 3 | 1 |
| Input Type | Differential, Single Ended | Differential, Single Ended |
| Data Interface | SPI | SPI |
| Configuration | MUX-PGA-ADC | PGA-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External |
| Voltage - Supply, Analog | 2.7V ~ 5.25V | 2.7V ~ 5.3V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.3V |
| Features | PGA, Temperature Sensor | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
Frequently asked questions
What are the primary functional differences between the ADS1247IPWR and the ADS1230IPWG4?
The ADS1247IPWR is a 24-bit, 4-channel delta-sigma ADC with an integrated PGA, excitation current sources, and a programmable data rate up to 2 kSPS, housed in a TSSOP-20 package. The ADS1230IPWG4 is a 20-bit, single-channel delta-sigma ADC with a fixed gain of 128 and data rates of 10 SPS or 80 SPS, housed in a TSSOP-16 package. The ADS1247 offers higher resolution, more input channels, and greater configurability, while the ADS1230 is a simpler, lower-resolution single-channel device.
Are the ADS1247IPWR and ADS1230IPWG4 pin-to-pin compatible?
No. The ADS1247IPWR uses a TSSOP-20 package and the ADS1230IPWG4 uses a TSSOP-16 package, so they have different pin counts and pinouts. They are not drop-in replacements for each other and require different PCB footprints.
What are the resolution and data rate specifications of each device?
The ADS1247IPWR provides 24-bit resolution with a programmable output data rate up to 2 kSPS. The ADS1230IPWG4 provides 20-bit resolution with selectable output data rates of 10 SPS or 80 SPS. The ADS1247 therefore offers higher resolution and a wider, programmable data-rate range.
How do the input configurations of the ADS1247IPWR and ADS1230IPWG4 differ?
The ADS1247IPWR has 4 input channels (configurable as differential or single-ended) with an integrated programmable gain amplifier. The ADS1230IPWG4 is a single-channel differential input device with a fixed gain of 128. The ADS1247 supports more flexible multi-channel sensor arrangements, while the ADS1230 is intended for single-bridge sensor applications.
Do both devices include an internal PGA and excitation current sources?
The ADS1247IPWR includes an integrated programmable gain amplifier and programmable excitation current sources, making it suitable for direct RTD and bridge sensor interfacing. The ADS1230IPWG4 includes a fixed gain of 128 but does not provide integrated excitation current sources. Designs requiring on-chip excitation should use the ADS1247.
What are the supply voltage and interface characteristics of each part?
Both devices operate from an analog supply of 2.7 V to 5.25 V and communicate over an SPI-compatible serial interface. The ADS1247IPWR additionally supports a separate digital supply and offers more configuration registers, while the ADS1230IPWG4 provides a simpler fixed-function interface. Designers should confirm exact supply and timing limits against the respective manufacturer datasheets.
Which device is better suited for high-resolution multi-channel measurement systems?
The ADS1247IPWR is better suited for high-resolution multi-channel systems because it offers 24-bit resolution, 4 input channels, a programmable PGA, and excitation current sources. The ADS1230IPWG4, with 20-bit resolution and a single fixed-gain channel, is better suited to simpler single-sensor designs where lower resolution and fixed configuration are acceptable.