Part A
ADS1204IRHBR
Texas Instruments
- Lifecycle
- Active
- Stock
- 6898 PCS
- Package
- VQFN-32
- Series
- Acquisition de données - ADC DAC - dédié
Replacement verdict
Not a drop-in replacement
The ADS1204IRHBR and ADS1283IRHFT are not drop-in replacements for one another. They differ fundamentally in resolution, architecture, channel count, and package footprint, so substituting one for the other requires full electrical and mechanical redesign validation.
Different resolution
Different channel count
Different package footprint
Different interface type
Parts at a glance
Part B
ADS1283IRHFT
Texas Instruments
- Lifecycle
- Active
- Stock
- 3422 PCS
- Package
- VFQFN-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (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 | ADS1283IRHFT | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 32 | Resolution determines the smallest signal change the ADC can distinguish; the 32-bit ADS1283 offers far finer quantization than the 16-bit ADS1204. |
| Architecture | Delta-sigma modulator | 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 design and interface requirements. |
| Number of input channels | 4 | 1 | Channel count determines how many independent signals can be measured; the ADS1204 supports four simultaneous channels versus one for the ADS1283. |
| Output interface | Serial (modulator bitstream) | SPI | The output format dictates how the host processor reads data; the ADS1204 outputs a raw modulator stream needing external filtering, whereas the ADS1283 provides filtered data over SPI. |
| Supply voltage (analog) | 5 V | 2.5 V to 5 V (analog), 1.8 V to 3.3 V (digital) | Supply requirements affect power rail design and compatibility; the ADS1283 offers wider and lower-voltage supply flexibility than the fixed 5 V ADS1204. |
| Package | 32-pin VQFN (RHB) | 24-pin VQFN (RHF) | Package footprint and pin count affect PCB layout and cannot be directly substituted without board redesign. |
| Operating temperature range | -40°C to +85°C | -40°C to +85°C | Both share the same industrial temperature range, so environmental tolerance is equivalent for this parameter. |
| Input type | Differential | Differential | Both accept differential inputs, which is important for rejecting common-mode noise in precision measurement applications. |
| Integrated digital filter | No (external required) | Yes (on-chip) | An integrated digital filter simplifies system design and reduces external component count; the ADS1204 requires an external FPGA/DSP filter. |
| Typical application focus | Motor control, current sensing | Seismic, energy exploration, precision instrumentation | Target application differs significantly; the ADS1283 targets ultra-high-resolution low-frequency measurements while the ADS1204 targets isolated current/voltage sensing in motor drives. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADS1204IRHBR | ADS1283IRHFT |
|---|---|---|
| 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 ADS1283IRHFT?
The ADS1204IRHBR is a four-channel, 16-bit delta-sigma modulator with a maximum data rate of 40 kSPS per channel, housed in a 32-pin VQFN package. The ADS1283IRHFT is a single-channel, 31-bit delta-sigma ADC with a maximum data rate of 4 kSPS in a 24-pin VQFN package. They differ in resolution, channel count, data rate, and package pin count.
Are the ADS1204IRHBR and ADS1283IRHFT pin-to-pin compatible?
No. The ADS1204IRHBR uses a 32-pin VQFN package, while the ADS1283IRHFT uses a 24-pin VQFN package. The pin counts and pin functions differ, so they are not pin-to-pin compatible and cannot be directly substituted on the same PCB land pattern.
What are the resolution and channel count specifications for each device?
The ADS1204IRHBR provides 16-bit resolution across four independent delta-sigma modulator channels. The ADS1283IRHFT provides 31-bit resolution on a single channel. The ADS1204 is intended for multi-channel isolated measurement, while the ADS1283 targets high-resolution single-channel seismic and precision sensing applications.
How do the maximum data rates of the ADS1204IRHBR and ADS1283IRHFT compare?
The ADS1204IRHBR supports a maximum data rate of 40 kSPS per channel. The ADS1283IRHFT supports a maximum data rate of 4 kSPS. The ADS1204 therefore offers higher throughput per channel, while the ADS1283 trades data rate for higher resolution.
What are the supply voltage requirements for the ADS1204IRHBR and ADS1283IRHFT?
The ADS1204IRHBR operates from a 5 V analog supply (AVDD) and a 3.0 V to 5.5 V digital supply (DVDD). The ADS1283IRHFT operates from a 5 V analog supply (AVDD) and a 3.3 V digital supply (DVDD), with an additional 5 V supply for the internal reference buffer. Designers should verify exact supply ranges against the respective manufacturer datasheets.
What are the typical target applications for each device?
The ADS1204IRHBR is typically used in motor control, current sensing, and isolated multi-channel measurement systems where four synchronized modulator channels are required. The ADS1283IRHFT is typically used in seismic data acquisition, energy exploration, and high-resolution precision instrumentation where a single low-noise, high-resolution channel is needed.
Do both devices support an external reference, and how does this affect design?
Yes, both devices support an external voltage reference. The ADS1204IRHBR uses an external reference for its modulator channels, while the ADS1283IRHFT uses an external reference for its high-resolution ADC. The reference source and decoupling must be selected per each device's datasheet to achieve specified accuracy and noise performance.
Can the ADS1204IRHBR and ADS1283IRHFT be used interchangeably in an existing design?
No. Because they differ in package pin count, channel count, resolution, data rate, and supply configuration, they are not interchangeable. A redesign of the PCB land pattern, digital interface, and signal chain would be required to migrate between the two devices.