Part A
AD1674JRZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4071 PCS
- Package
- SOIC-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD1674JRZ and AD1674KR are functionally compatible 12-bit successive-approximation ADCs sharing the same package, pinout, and architecture. The AD1674KR offers a higher grade with tighter linearity and accuracy specifications, making it a valid functional substitute where enhanced precision is required. Both devices are direct replacements in existing designs, though the AD1674KR provides superior performance margins.
Resolution and Architecture
High match
Package and Pinout
High match
Linearity and Accuracy Grade
Validation required
Operating Temperature Range
High match
Parts at a glance
Part B
AD1674KR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 654 PCS
- Package
- SOIC-28
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD1674JRZ | AD1674KR | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Confirms both parts originate from the same manufacturer, ensuring consistent design lineage and documentation. |
| Resolution | 12 bit | 12 bit | Resolution determines the smallest analog change the ADC can distinguish, directly affecting measurement precision. |
| Sampling Rate | 100 kSPS | 100 kSPS | The maximum conversion rate limits the bandwidth of signals that can be digitized without aliasing. |
| Number of Inputs | 2 (single-ended) | 2 (single-ended) | Input channel count determines how many analog sources can be multiplexed into the converter. |
| Input Type | Single-ended | Single-ended | Input configuration affects signal conditioning circuitry and common-mode rejection requirements. |
| Data Interface | Parallel | Parallel | The interface type dictates how the ADC connects to a host processor or FPGA. |
| Architecture | SAR | SAR | SAR architecture offers no latency and is well suited for multiplexed and control-loop applications. |
| Reference Type | Internal | Internal | An internal reference simplifies system design and reduces external component count. |
| Operating Temperature Range | 0°C to 70°C | 0°C to 70°C | The temperature grade determines suitability for commercial versus industrial environments. |
| Package / Case | 28-SOIC | 28-SOIC | Package compatibility ensures the part can be dropped into the same PCB footprint. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD1674JRZ | AD1674KR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| 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 | 0°C ~ 70°C |
Frequently asked questions
What are the main differences between the AD1674JRZ and the AD1674KR?
The AD1674JRZ and AD1674KR are both 12-bit, 100 kSPS analog-to-digital converters from Analog Devices. The primary difference is their specified grade and operating temperature range. The AD1674JRZ is a commercial-grade device specified for 0°C to +70°C operation, while the AD1674KR is a higher-grade device specified for 0°C to +70°C with tighter linearity and accuracy specifications. The AD1674JRZ is supplied in a 28-lead SOIC package, and the AD1674KR is supplied in a 28-lead PDIP package.
Are the AD1674JRZ and AD1674KR pin-compatible?
No. The AD1674JRZ is offered in a 28-lead SOIC (R-28) package, while the AD1674KR is offered in a 28-lead PDIP (N-28) package. Although both have 28 pins, the physical package types and PCB land patterns differ, so they are not drop-in replacements without a board redesign.
Can the AD1674JRZ and AD1674KR be used interchangeably in an existing design?
Not directly. Because the AD1674JRZ is a SOIC package and the AD1674KR is a PDIP package, they require different PCB footprints. Additionally, the AD1674KR offers tighter performance specifications than the AD1674JRZ. Substitution requires verifying that the board layout accommodates the alternate package and that the system performance requirements are met by the selected grade.
What is the resolution and sampling rate of the AD1674JRZ and AD1674KR?
Both the AD1674JRZ and AD1674KR are 12-bit successive-approximation analog-to-digital converters with a maximum throughput rate of 100 kSPS. These parameters are common to the AD1674 family and are specified in the Analog Devices AD1674 datasheet.
Do the AD1674JRZ and AD1674KR have the same analog input ranges?
Yes. Both devices support the same analog input ranges as defined by the AD1674 family: ±10 V, ±5 V, 0 V to +10 V, and 0 V to +20 V, configured via external pin strapping. These ranges are common to both the JRZ and KR grades.
What is the difference in accuracy between the AD1674JRZ and AD1674KR?
The AD1674KR is a higher-grade device with tighter specifications than the AD1674JRZ. According to the Analog Devices AD1674 datasheet, the KR grade offers better integral nonlinearity (INL), differential nonlinearity (DNL), and gain and offset error limits than the JRZ grade. Designers should consult the specific grade specifications in the datasheet to confirm that the selected device meets the required accuracy budget.
What are the operating temperature ranges for the AD1674JRZ and AD1674KR?
Both the AD1674JRZ and AD1674KR are specified for operation over the commercial temperature range of 0°C to +70°C. This is consistent with the J and K grade designations in the AD1674 product family.
Do the AD1674JRZ and AD1674KR require the same external components?
Yes. Both devices belong to the same AD1674 family and require the same external components for operation, including a reference, clock, and decoupling capacitors as specified in the Analog Devices AD1674 datasheet. The external component requirements are common to the family and do not differ between the JRZ and KR grades.