Part A
ADS1204IRHBR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6898 個数
- Package
- VQFN-32
- Series
- データ取得 - ADC/DAC - 特殊用途向け
Replacement verdict
Not a drop-in replacement
The ADS1204IRHBR and ADS1283BIRHFR are not drop-in replacements for one another. The ADS1204IRHBR is a four-channel 16-bit delta-sigma modulator with a CMOS/TTL-compatible interface, while the ADS1283BIRHFR is a single-channel 31-bit delta-sigma ADC with an SPI-compatible interface. They differ in channel count, resolution, output interface, and package, so substituting one for the other requires a full redesign of the surrounding circuitry and firmware.
Different channel count
Different resolution
Different output interface
Different package
Parts at a glance
Part B
ADS1283BIRHFR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 6401 個数
- Package
- VFQFN-24
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | ADS1204IRHBR | ADS1283BIRHFR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 32 | Resolution determines the smallest signal change the ADC can distinguish; the 32-bit device offers far finer quantization, which is critical for high-dynamic-range precision measurement. |
| Architecture | Delta-sigma modulator | Delta-sigma ADC | The ADS1204 is a modulator-only output device requiring external digital filtering, while the ADS1283 integrates a full ADC with digital filter, affecting system complexity and interface design. |
| Number of input channels | 4 (differential) | 1 (differential) | Channel count determines how many signals can be measured simultaneously; the 4-channel device suits multi-sensor systems while the single-channel device targets focused high-precision measurement. |
| Output interface | Serial (modulator bitstream) | SPI | The output format dictates how the device connects to a host processor; a raw modulator bitstream needs external filtering, whereas SPI provides ready-to-use digital codes. |
| Supply voltage (analog) | 5 V | 2.7 V to 5.25 V (analog), 1.8 V to 3.6 V (digital) | Supply requirements affect power-rail design and compatibility with the rest of the system; the wider and dual-rail range of the ADS1283 offers more flexibility for low-voltage designs. |
| Package | 32-pin VQFN (5x5 mm) | 24-pin VQFN (4x4 mm) | Package footprint and pin count affect PCB layout and board space; these 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 defines the environments in which the part can reliably operate; both cover the industrial range, so this is not a differentiator. |
| Typical application focus | Motor control, current sensing, isolated measurement | Seismic, energy exploration, high-precision instrumentation | Intended application indicates the design trade-offs (speed vs. precision, channel count vs. resolution) and helps judge functional substitutability in a given system. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1204IRHBR | ADS1283BIRHFR |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Number of Bits | - | 31 |
| Sampling Rate(Per Second) | 40k | 128k |
| Number of Inputs | - | 2 |
| Input Type | - | Differential |
| Data Interface | Parallel | SPI |
| Configuration | - | MUX-PGA-ADC |
| Ratio - S / H: ADC | - | 0:1 |
| Number of A/D Converters | - | 1 |
| Architecture | - | Sigma-Delta |
| Reference Type | - | External |
| Voltage - Supply, Analog | - | 2.15V ~ 5.25V |
| Voltage - Supply, Digital | - | 1.65V ~ 3.6V |
| Features | - | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 85°C |
| Type | Modulator | - |
| Number of Channels | 4 | - |
| Resolution(Bits) | 16 b | - |
| Voltage Supply Source | Analog and Digital | - |
| Voltage - Supply | 2.7V ~ 5.5V | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
What are the primary differences between the ADS1204IRHBR and the ADS1283BIRHFR?
The ADS1204IRHBR is a 4-channel, 16-bit delta-sigma modulator with a maximum output rate of 40 kSPS, housed in a 32-pin VQFN package. The ADS1283BIRHFR is a single-channel, 32-bit delta-sigma ADC with a maximum data rate of 4 kSPS, housed in a 24-pin VQFN package. The ADS1204 is designed for isolated current and voltage sensing with modulator outputs, while the ADS1283 is a high-resolution ADC intended for seismic and precision measurement applications.
Are the ADS1204IRHBR and ADS1283BIRHFR pin-to-pin compatible?
No. The ADS1204IRHBR uses a 32-pin VQFN package, while the ADS1283BIRHFR uses a 24-pin VQFN package. The pin counts and pin functions differ, so they are not pin-to-pin compatible and cannot be interchanged on the same PCB land pattern without redesign.
What are the resolution and output data rate specifications for each device?
The ADS1204IRHBR provides 16-bit resolution with a maximum modulator clock frequency of 20 MHz and a maximum output data rate of 40 kSPS. The ADS1283BIRHFR provides 32-bit resolution with a maximum data rate of 4 kSPS. The ADS1283 offers higher resolution but a significantly lower output data rate than the ADS1204.
Do both devices support the same supply voltage ranges?
No. The ADS1204IRHBR operates from a 5 V analog supply and a 2.7 V to 5.5 V digital supply. The ADS1283BIRHFR operates from a 5 V analog supply and a 1.8 V to 3.3 V digital supply. The digital supply ranges differ, so level shifting or supply rail adjustments may be required when comparing designs.
What are the typical applications for the ADS1204IRHBR versus the ADS1283BIRHFR?
The ADS1204IRHBR is typically used in isolated current sensing, motor control, and power monitoring applications where multiple channels and modulator outputs are required. The ADS1283BIRHFR is typically used in seismic data acquisition, precision industrial measurement, and energy exploration applications where high resolution and low noise are critical.
What is the operating temperature range for each device?
Both the ADS1204IRHBR and the ADS1283BIRHFR are specified for an operating temperature range of -40°C to +85°C. This is consistent with the industrial temperature grade indicated by the "I" suffix in both part numbers.
Can the ADS1204IRHBR be used as a direct replacement for the ADS1283BIRHFR in an existing design?
No. The two devices differ in resolution (16-bit vs 32-bit), channel count (4 vs 1), output data rate (40 kSPS vs 4 kSPS), package (32-pin VQFN vs 24-pin VQFN), and digital supply range. A direct replacement is not possible without significant redesign of the PCB, power supply, and digital interface.