Part A
ADS1283IRHFR
德州儀器
- Lifecycle
- Active
- Stock
- 58 件
- Series
- 資料獲取-模數轉換器（ADC）
Replacement verdict
Not a drop-in replacement
The ADS1204IRHBR and ADS1283IRHFR are not drop-in replacements for one another. They differ in resolution and architecture, input configuration, output interface, and package footprint, so a direct board-level substitution is not feasible without redesign.
Different resolution and architecture
Different input configuration
Different output interface
Different package footprint
Parts at a glance
Part B
ADS1204IRHBR
德州儀器
- Lifecycle
- Active
- Stock
- 6898 件
- Package
- VQFN-32
- Series
- 資料獲取-ADC DAC-專用
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 | ADS1283IRHFR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 32 | Resolution determines the smallest signal change the ADC can distinguish; the ADS1283 offers significantly finer quantization, which is critical for high-dynamic-range seismic and precision measurement applications. |
| Architecture | Delta-sigma modulator (2nd order) | Delta-sigma ADC | The ADS1204 is a modulator-only device requiring external digital filtering, while the ADS1283 is a complete ADC with integrated digital filter, affecting system complexity and substitutability. |
| Number of input channels | 4 (differential) | 1 (differential) | Channel count determines how many signals can be measured simultaneously; the ADS1204 supports four differential inputs while the ADS1283 supports only one, which is a major functional difference. |
| Output interface | Serial (modulator bitstream) | SPI-compatible serial | The output format dictates how the host processor receives data; the ADS1204 outputs a raw modulator bitstream requiring digital filtering, whereas the ADS1283 provides filtered digital output over SPI. |
| Supply voltage (analog) | 5 V | 2.7 V to 3.6 V (analog), 1.65 V to 3.6 V (digital) | Supply voltage compatibility affects whether the part can drop into an existing power rail design; the two devices operate on different analog supply ranges. |
| Package | 32-pin VQFN (RHB) | 24-pin VQFN (RHF) | Package footprint and pin count must match the PCB layout for a drop-in replacement; these devices use different package sizes and pin counts. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | The temperature range indicates the environments in which the device is guaranteed to operate; both parts share the same industrial range here. |
| Typical application focus | Motor control, current sensing, industrial measurement | Seismic, energy exploration, high-resolution precision measurement | The intended application domain reflects the device's noise, linearity, and bandwidth trade-offs, which strongly influence functional substitutability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1283IRHFR | ADS1204IRHBR |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 31 | - |
| Sampling Rate (Per Second) | 128k | - |
| Number of Inputs | 2 | - |
| Input Type | Differential | - |
| Data Interface | SPI | Parallel |
| 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 ~ 85°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | ADS1283 | - |
| Type | - | Modulator |
| Number of Channels | - | 4 |
| Resolution(Bits) | - | 16 b |
| Sampling Rate(Per Second) | - | 40k |
| Voltage Supply Source | - | Analog and Digital |
| Voltage - Supply | - | 2.7V ~ 5.5V |
Frequently asked questions
What are the primary functional differences between the ADS1204IRHBR and ADS1283IRHFR?
The ADS1204IRHBR is a four-channel, 16-bit delta-sigma modulator with a 10 MHz master clock and a 40 kHz signal bandwidth per channel, designed for isolated current and voltage sensing. The ADS1283IRHFR is a single-channel, 31-bit delta-sigma ADC with a programmable data rate up to 4 kSPS and built-in PGA, designed for high-resolution seismic and energy exploration applications. They differ in resolution, channel count, output format (modulator bitstream vs. digital ADC output), and target application.
Are the ADS1204IRHBR and ADS1283IRHFR pin-compatible or package-compatible?
No. The ADS1204IRHBR is supplied in a 32-pin VQFN (RHB) package, while the ADS1283IRHFR is supplied in a 24-pin VQFN (RHF) package. The pin counts, pin functions, and PCB land patterns differ, so they are not drop-in replacements for each other.
What are the resolution and output data characteristics of each device?
The ADS1204IRHBR provides a 16-bit delta-sigma modulator output (1-bit bitstream) per channel, requiring external digital filtering. The ADS1283IRHFR provides a 31-bit digital output word at data rates up to 4 kSPS with integrated digital filtering and a programmable gain amplifier. The output formats and resolution specifications are not interchangeable.
Can the ADS1204IRHBR and ADS1283IRHFR operate from the same supply voltages?
The ADS1204IRHBR operates from a 5 V analog supply and a 3.0 V to 5.5 V digital supply. The ADS1283IRHFR operates from a 5 V analog supply and a 3.3 V digital supply. While both use a 5 V analog rail, the digital supply requirements and internal reference/regulator configurations differ, so power supply designs must be verified against each datasheet.
Which device is better suited for multi-channel isolated current sensing?
The ADS1204IRHBR is better suited for multi-channel isolated current sensing because it integrates four independent delta-sigma modulator channels in a single package, allowing simultaneous sensing of multiple phases or channels with a shared clock. The ADS1283IRHFR is a single-channel high-resolution ADC and would require multiple devices for multi-channel sensing.
Which device is intended for high-resolution seismic or energy exploration data acquisition?
The ADS1283IRHFR is intended for high-resolution seismic and energy exploration data acquisition, featuring 31-bit resolution, a programmable gain amplifier, and data rates up to 4 kSPS optimized for low-frequency, high-dynamic-range signals. The ADS1204IRHBR is a 16-bit modulator aimed at isolated current and voltage sensing rather than seismic-grade resolution.
Do both devices support the same digital interface for connection to a host processor?
No. The ADS1204IRHBR outputs a 1-bit delta-sigma bitstream per channel on separate data lines and requires an external digital filter (e.g., in an FPGA or DSP) to reconstruct the sample word. The ADS1283IRHFR provides a complete digital ADC output over an SPI-compatible serial interface with integrated filtering. The host interface and signal processing requirements are therefore fundamentally different.