Part A
AMC1203DUBR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2430 PCS
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AMC1200STDUBRQ1 is a functionally comparable alternative to the AMC1203DUBR for isolated current-sensing and shunt-based measurement applications, sharing the same isolated delta-sigma modulator architecture, SOIC-8 footprint, and 5 V supply rail. Designers should validate the differing input voltage range, output interface configuration, and automotive qualification grade against their specific application requirements before committing to a drop-in substitution.
Input Voltage Range
Validation required
Output Interface Type
Validation required
Package Type
High match
Qualification Grade
Validation required
Parts at a glance
Part B
AMC1200STDUBRQ1
Texas Instruments
- Lifecycle
- Active
- Stock
- 5214 PCS
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
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 | AMC1200STDUBRQ1 | Why it matters |
|---|---|---|---|
| Input Signal Type | Current (shunt-based, ±250 mV input range) | Voltage (±250 mV input range) | Determines whether the device is designed to sense current via a shunt resistor or a differential voltage directly; affects circuit topology and sensing method. |
| Output Interface | 1-bit sigma-delta modulator (digital bitstream) | Differential analog output | Defines how the signal is passed to the controller; a digital bitstream requires an external digital filter/SINC filter, while an analog output feeds an ADC directly. |
| Isolation Voltage (VISO) | 4000 VPK (per datasheet) | 4250 VPK (per datasheet) | Higher isolation voltage provides greater safety margin and transient immunity in high-voltage industrial and automotive applications. |
| Qualification / Grade | Industrial grade | AEC-Q100 automotive qualified (Q1) | Automotive qualification (Q1) indicates the part is tested to stricter reliability and temperature standards required for automotive use. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +125°C | A wider temperature range supports harsher environments and provides more thermal headroom in automotive and industrial designs. |
| Package | 8-pin SOP (DUB) | 8-pin SOP (DUB) | Package footprint and pinout affect PCB layout compatibility and whether the parts are drop-in replacements. |
| Supply Voltage (VDD1 / VDD2) | 5 V (both sides) | 5 V (both sides) | Matching supply rails simplify power design and allow reuse of the same power architecture. |
| Gain / Sensitivity | Fixed gain (modulator, defined by bitstream density) | Fixed gain of 8 (analog output) | Gain determines the output scaling relative to input; different gain architectures require different downstream signal conditioning. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1203DUBR | AMC1200STDUBRQ1 |
|---|---|---|
| Series | - | Automotive, AEC-Q100 |
| 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 AMC1200STDUBRQ1?
The AMC1203DUBR is a single-channel, 16-bit isolated delta-sigma modulator with an internal clock and a ±250 mV input range, while the AMC1200STDUBRQ1 is an automotive-qualified (AEC-Q100 Grade 1) isolated amplifier with a fixed gain of 8 and a ±250 mV input range. The AMC1203DUBR outputs a digital bitstream, whereas the AMC1200STDUBRQ1 outputs a differential analog voltage. The AMC1200STDUBRQ1 is qualified to AEC-Q100 for automotive applications, while the AMC1203DUBR is not.
Are the AMC1203DUBR and AMC1200STDUBRQ1 pin-compatible?
No. Both devices are offered in an 8-pin SOIC (DUB) package, but their pin functions differ. The AMC1203DUBR provides a digital data output (DOUT) and clock-related pins, while the AMC1200STDUBRQ1 provides differential analog outputs (VOUTP, VOUTN). Therefore, they are not pin-compatible and cannot be interchanged on the same PCB without redesign.
What is the input voltage range of each device?
Both the AMC1203DUBR and the AMC1200STDUBRQ1 are specified for a linear input voltage range of ±250 mV, making them suitable for shunt-resistor-based current sensing in high-voltage systems.
What are the output types of the AMC1203DUBR and AMC1200STDUBRQ1?
The AMC1203DUBR provides a single-bit delta-sigma digital bitstream output that requires an external digital filter (such as an FPGA or DSP) to reconstruct the sampled signal. The AMC1200STDUBRQ1 provides a differential analog output voltage with a fixed gain of 8, which can be directly interfaced to an ADC or microcontroller.
Is the AMC1200STDUBRQ1 automotive qualified, and is the AMC1203DUBR?
The AMC1200STDUBRQ1 is qualified to AEC-Q100 Grade 1 and is designated as an automotive-grade device (Q1 suffix). The AMC1203DUBR is a standard industrial-grade device and is not AEC-Q100 qualified.
What are the isolation ratings of these two devices?
Both the AMC1203DUBR and the AMC1200STDUBRQ1 provide reinforced isolation with a withstand voltage of 4 kVPK per UL1577 and a working voltage of 1.2 kVPK per VDE V 0884-10, as specified in the respective Texas Instruments datasheets.
Can the AMC1203DUBR be used as a drop-in replacement for the AMC1200STDUBRQ1?
No. Because the AMC1203DUBR outputs a digital bitstream and the AMC1200STDUBRQ1 outputs a differential analog voltage, and because their pin functions differ, a direct drop-in replacement is not possible. A system redesign, including changes to the signal chain and PCB layout, would be required.
What are the typical applications for each device?
The AMC1203DUBR is typically used in motor control, industrial inverters, and power monitoring where a digital bitstream output is processed by an external digital filter. The AMC1200STDUBRQ1 is typically used in automotive and industrial current sensing, such as traction inverters, battery management systems, and motor drives, where an isolated analog output is required.