Part A
AD1674JRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4071 PCS
- Package
- SOIC-28
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD1674JRZ and AD1674BR are functionally equivalent 12-bit successive-approximation ADCs sharing the same pinout, package, and internal architecture. The AD1674BR offers a higher-grade temperature and linearity specification, making it a valid functional substitute for the AD1674JRZ in most designs, provided the tighter accuracy grade is acceptable or beneficial. Designers should confirm that the commercial temperature range of the JRZ grade is not a hard requirement before substituting.
Resolution and Architecture
High match
Package and Pinout
High match
Temperature Grade
Validation required
Linearity and Accuracy Grade
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD1674JRZ | AD1674BR | Why it matters |
|---|---|---|---|
| Operating Temperature Range | 0°C to +70°C | -40°C to +85°C | The commercial-grade JRZ version is limited to benign environments, while the industrial-grade BR version supports wider temperature extremes, affecting suitability for harsh or outdoor applications. |
| Grade / Temperature Grade | Commercial (J grade) | Industrial (B grade) | The grade designation reflects tested performance limits and reliability screening; B-grade parts are specified and tested over the industrial range, making them preferable for industrial and automotive use. |
| INL (Integral Nonlinearity) | ±1/2 LSB max | ±1/2 LSB max | INL defines the maximum deviation from an ideal transfer function; both grades share the same linearity specification, so accuracy is equivalent. |
| DNL (Differential Nonlinearity) | ±3/4 LSB max | ±3/4 LSB max | DNL guarantees no missing codes and monotonicity; identical DNL means both parts deliver the same code-level fidelity. |
| Resolution | 12 bits | 12 bits | Resolution determines the smallest detectable analog change; both are 12-bit SAR converters, so quantization granularity is identical. |
| Conversion Time | 10 µs max | 10 µs max | Conversion time sets the maximum sampling throughput; identical timing means both parts support the same data acquisition rates. |
| Package / Case | 28-Lead SOIC (Wide) | 28-Lead SOIC (Wide) | Package compatibility ensures the parts are drop-in replacements on the same PCB footprint without layout changes. |
| Supply Voltage | ±12 V or ±15 V analog, +5 V digital | ±12 V or ±15 V analog, +5 V digital | Matching supply requirements means the same power rails and decoupling scheme can be reused, simplifying substitution. |
| Power Consumption | 385 mW typ | 385 mW typ | Equivalent power draw affects thermal design and supply sizing; identical consumption means no change to thermal management is needed. |
| Interface Type | Parallel (byte/12-bit) | Parallel (byte/12-bit) | The parallel interface determines how the converter connects to the host processor; identical interfacing allows direct firmware and bus compatibility. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD1674JRZ | AD1674BR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 100k | 100k |
| Number of Inputs | 1 | 1 |
| Input Type | Single Ended | Single Ended |
| Data Interface | Parallel | Parallel |
| Configuration | S/H-ADC | S/H-ADC |
| Ratio - S / H: ADC | 1:1 | 1:1 |
| Number of A/D Converters | 1 | 1 |
| Architecture | SAR | SAR |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | ±11.4V ~ 16.5V | ±11.4V ~ 16.5V |
| Voltage - Supply, Digital | 5V | 5V |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C |
Frequently asked questions
What are the main differences between the AD1674JRZ and the AD1674BR?
The AD1674JRZ is a commercial-grade 12-bit analog-to-digital converter specified for operation over the 0°C to +70°C temperature range and is supplied in a 28-lead SOIC package. The AD1674BR is a military/aerospace-grade version specified for operation over the -55°C to +125°C temperature range and is supplied in a 28-lead ceramic dual in-line package (CERDIP). Both devices share the same core 12-bit successive-approximation architecture, 10 µs conversion time, and pin functions, but they differ in temperature grade, package material, and screening level.
Are the AD1674JRZ and AD1674BR pin-compatible?
No. The AD1674JRZ uses a 28-lead SOIC (surface-mount) package, while the AD1674BR uses a 28-lead CERDIP (through-hole) package. Although the pin functions are equivalent, the physical package dimensions, lead pitch, and mounting style differ, so they are not drop-in replacements on the same PCB footprint without a layout change.
Can the AD1674JRZ be used as a substitute for the AD1674BR in an existing design?
Only if the target application operates within the AD1674JRZ's 0°C to +70°C temperature range and the PCB accepts a 28-lead SOIC footprint. The AD1674BR is rated for -55°C to +125°C and uses a CERDIP package, so substituting the JRZ in a military or high-reliability application would violate the specified operating temperature range and package requirements. Always verify against the official Analog Devices datasheet before substituting.
Do the AD1674JRZ and AD1674BR have the same resolution and conversion speed?
Yes. Both devices are 12-bit successive-approximation analog-to-digital converters with a specified conversion time of 10 µs (typical) and a maximum throughput rate of 100 kSPS. The resolution and conversion speed specifications are identical across both grades.
What are the operating temperature ranges for the AD1674JRZ and AD1674BR?
The AD1674JRZ is specified for the commercial temperature range of 0°C to +70°C. The AD1674BR is specified for the military temperature range of -55°C to +125°C. These ranges are defined in the respective Analog Devices datasheets and are not interchangeable.
Are the AD1674JRZ and AD1674BR functionally identical in terms of internal architecture?
Yes. Both devices use the same 12-bit successive-approximation converter core with an internal clock, a high-precision voltage reference, and a sample-and-hold amplifier. The functional block diagram and digital interface (parallel 12-bit output) are the same. The differences are limited to temperature grade, package type, and screening/qualification level.
Which package types are used for the AD1674JRZ and AD1674BR?
The AD1674JRZ is offered in a 28-lead SOIC (Small Outline Integrated Circuit) package. The AD1674BR is offered in a 28-lead CERDIP (Ceramic Dual In-line Package). The package suffix "R" in JRZ indicates SOIC, while the "B" grade in BR is associated with the CERDIP package and military temperature range.
Do the AD1674JRZ and AD1674BR have the same power supply requirements?
Yes. Both devices require dual ±15 V analog supplies and a +5 V digital supply, as specified in the Analog Devices AD1674 datasheet. Power consumption is typically 385 mW for both grades. The supply voltage ranges and current requirements are identical across the two versions.