Part A
AD694ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 4975 個数
- Package
- SOIC-16
- Series
- インターフェース - センサーおよび検出器インターフェース
Replacement verdict
Compatible functional replacement candidate
The AD694ARZ is a functionally compatible replacement candidate for the AD694BRZ, sharing the same voltage-to-current transmitter architecture, pinout, and package. The primary distinction is the specified grade performance, where the BRZ offers tighter guaranteed accuracy over temperature. Designers should validate that the ARZ grade's accuracy specifications meet the requirements of the target application before substituting.
Function and Output Type
High match
Package and Pinout
High match
Accuracy Grade
Validation required
Supply Voltage Range
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 | AD694BRZ | AD694ARZ | Why it matters |
|---|---|---|---|
| Grade / Accuracy Class | B grade (higher accuracy) | A grade (standard accuracy) | The B grade offers tighter guaranteed specifications, which directly affects total error budget in precision current-loop transmitters. |
| Total Unadjusted Error (max) | ±0.05% FS | ±0.10% FS | Determines the worst-case output error without calibration; the B grade halves the guaranteed error versus the A grade. |
| Nonlinearity (max) | ±0.005% FS | ±0.01% FS | Linearity impacts fidelity of the 4-20 mA output across the full input span; tighter nonlinearity improves measurement accuracy. |
| Input Offset Voltage (max) | ±0.5 mV | ±1.0 mV | Lower input offset reduces zero-scale error in the voltage-to-current conversion, important for accurate 4 mA low-end calibration. |
| Input Offset Drift (max) | ±5 µV/°C | ±10 µV/°C | Drift over temperature affects stability of the loop current in industrial environments; the B grade is twice as stable. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Both parts share the industrial temperature range, so environmental suitability is equivalent. |
| Output Current Range | 4 mA to 20 mA | 4 mA to 20 mA | The standard 4-20 mA loop output is the core function; identical range means functional interchangeability in the loop. |
| Supply Voltage Range | +4.5 V to +36 V | +4.5 V to +36 V | Wide common supply range allows use in both 5 V and 24 V industrial systems without redesign. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pinout enable drop-in board replacement between the two grades. |
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 | AD694ARZ | AD694BRZ |
|---|---|---|
| Part Status | Active | Active |
| Type | Current Transmitter | Current Transmitter |
| Input Type | Voltage | Voltage |
| Output Type | Voltage | Voltage |
| Supply Current | 23 mA | 23 mA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |