Part A
AMC1203DUBR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2430 Stückzahl
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AMC1200SDUBR is a functional replacement candidate for the AMC1203DUBR, sharing the same isolated amplifier architecture, SOIC-8 package, and 5 V supply rail, but it is not a pin-for-pin drop-in. The AMC1203DUBR integrates an internal clock and outputs a single-ended voltage, whereas the AMC1200SDUBR requires an external clock and provides a differential output, so the surrounding circuitry and downstream ADC interface must be revalidated before substitution.
Output Type
Validation required
Clock Architecture
Validation required
Package Type
High match
Supply Voltage
High match
Parts at a glance
Part B
AMC1200SDUBR
Texas Instruments
- Lifecycle
- Active
- Stock
- 7411 Stückzahl
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC1203DUBR | AMC1200SDUBR | Why it matters |
|---|---|---|---|
| Resolution (bits) | 16 | 12 | Higher resolution provides finer measurement granularity, which affects accuracy of the digitized signal. |
| Output Interface | Serial (SPI-compatible) | Differential analog | Determines whether the device outputs a digital bitstream or an analog voltage, dictating the downstream interface circuitry. |
| Input Type | Isolated delta-sigma modulator | Isolated amplifier | Defines the signal-conditioning function; a modulator requires a digital filter, while an amplifier feeds an ADC directly. |
| Typical Gain / Signal Transfer | Modulator output (density-encoded) | Fixed gain of 8 | Affects the scaling between input signal and output, impacting system calibration and dynamic range. |
| Isolation Voltage (VISO) | 4000 VPK (per datasheet) | 4250 VPK (per datasheet) | Higher isolation rating improves safety margin in high-voltage measurement applications. |
| Supply Voltage (VDD1 / VDD2) | 5 V (both sides) | 5 V (both sides) | Supply requirements must match the system rails for direct substitution without redesign. |
| Package | 8-SOIC (DUB) | 8-SOIC (DUB) | Package compatibility ensures the part can be placed on the same PCB footprint. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Temperature range must cover the application environment for reliable operation. |
| Input Voltage Range | ±320 mV (full-scale) | ±250 mV (full-scale) | Input range determines the maximum measurable signal and affects shunt resistor selection. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1203DUBR | AMC1200SDUBR |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | - | Isolation |
| Number of Circuits | - | 1 |
| Output Type | - | Differential |
| -3 dB Bandwidth | - | 100 kHz |
| Voltage - Input Offset | - | 200 µV |
| Supply Current | - | 5.4mA |
| Current - Output / Channel | - | 20 mA |
| Voltage - Supply Span(Min) | - | 2.7 V |
| Voltage - Supply Span(Max) | - | 5.5 V |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | AMC1203 | - |
| Number of Bits | 16 | - |
| Sampling Rate (Per Second) | 40k | - |
| Number of Inputs | 1 | - |
| Input Type | Differential | - |
| Configuration | ADC | - |
| Number of A / D Converters | 1 | - |
| Architecture | Sigma-Delta | - |
| Reference Type | Internal | - |
| Voltage - Supply, Analog | 5V | - |
| Voltage - Supply, Digital | 5V | - |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
Frequently asked questions
What are the key differences between the AMC1203DUBR and the AMC1200SDUBR?
The AMC1203DUBR is a single-channel, second-order delta-sigma modulator with an internal clock and a ±250 mV input range, while the AMC1200SDUBR is an isolated amplifier with a fixed gain of 8 and a ±250 mV input range. The AMC1203DUBR outputs a 1-bit data stream for external digital filtering, whereas the AMC1200SDUBR provides a differential analog output. Both are isolated devices in a DUB-8 (SOP-8) package, but they serve different signal-chain architectures.
Are the AMC1203DUBR and AMC1200SDUBR pin-compatible?
No. Although both devices are offered in the same DUB-8 (SOP-8) package, their pin functions differ. The AMC1203DUBR provides a clock output and a data output for the modulator stream, while the AMC1200SDUBR provides differential analog outputs (VOUTP and VOUTN). Therefore, they are not direct pin-for-pin substitutes and require different PCB routing and downstream circuitry.
What is the input voltage range of both devices?
Both the AMC1203DUBR and the AMC1200SDUBR are specified for a linear input voltage range of ±250 mV, making them suitable for shunt-resistor-based current sensing in isolated applications.
What are the output types of the AMC1203DUBR and AMC1200SDUBR?
The AMC1203DUBR outputs a 1-bit delta-sigma modulated data stream that must be processed by an external digital filter (e.g., an FPGA or DSP) to reconstruct the analog value. The AMC1200SDUBR outputs a differential analog voltage with a fixed gain of 8, which can be fed directly into an ADC or analog signal chain.
Do both devices provide galvanic isolation, and what is the isolation rating?
Yes. Both the AMC1203DUBR and the AMC1200SDUBR are isolated devices intended for galvanic isolation between the high-voltage and low-voltage sides. Designers should consult the respective manufacturer datasheets for the exact isolation voltage, working voltage, and certification details, as these parameters must be verified against the specific datasheet revision for the target design.
Which device is better suited for a design that uses an external digital filter or FPGA?
The AMC1203DUBR is the appropriate choice when the system architecture includes an external digital filter or FPGA, because it outputs a 1-bit delta-sigma data stream that is processed digitally. The AMC1200SDUBR is better suited to designs that require a direct differential analog output feeding an ADC or analog control loop.
Can the AMC1203DUBR and AMC1200SDUBR be used in the same application interchangeably?
No. Because their output formats differ (digital modulator stream versus differential analog voltage) and their pin functions are not identical, they cannot be used interchangeably without redesigning the signal chain, the PCB layout, and the downstream processing circuitry. Selection must be based on the system architecture and verified against the manufacturer datasheets.