Part A
AD7327BRUZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3453 個数
- Package
- TSSOP-20
- Series
- データ取得 - アナログ/デジタルコンバータ (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7327TRU-EP is a functionally compatible candidate for the AD7327BRUZ, sharing the same 12-bit plus sign successive-approximation ADC architecture, 8-channel (single-ended) / 4-channel (differential) input configuration, 500 kSPS throughput, and 20-lead TSSOP footprint. The primary distinction is the enhanced-product (EP) screening and qualification flow of the TRU-EP grade, which targets extended temperature and reliability requirements. Designers should validate the operating temperature range and screening documentation against their application's qualification plan before committing to the substitution.
Resolution and Architecture
High match
Channel Count and Input Configuration
High match
Package and Pinout
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
AD7327TRU-EP
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6822 個数
- Package
- TSSOP-20
- Series
- データ取得 - アナログ/デジタルコンバータ (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 | AD7327BRUZ | AD7327TRU-EP | Why it matters |
|---|---|---|---|
| Number of Bits (Resolution) | 12 | 12 | Resolution determines the smallest analog signal change the ADC can distinguish; identical resolution means equivalent measurement granularity. |
| Number of Input Channels | 8 (4 differential / 8 single-ended) | 8 (4 differential / 8 single-ended) | Channel count defines how many analog signals can be monitored; matching counts ensures the same system-level input capacity. |
| Sampling Rate | 500 kSPS | 500 kSPS | Throughput sets the maximum signal bandwidth that can be captured; identical rates preserve timing performance in the application. |
| Input Voltage Range | ±10 V, ±5 V, ±2.5 V, 0 to +10 V (software selectable) | ±10 V, ±5 V, ±2.5 V, 0 to +10 V (software selectable) | Selectable ranges allow direct interfacing with various sensor and signal levels; matching ranges ensures drop-in compatibility. |
| Supply Voltage | 2.7 V to 16.5 V (VDD/VSS), 2.7 V to 5.25 V (VCC) | 2.7 V to 16.5 V (VDD/VSS), 2.7 V to 5.25 V (VCC) | Supply requirements determine power rail compatibility; identical ranges allow the same power design to be reused. |
| Interface Type | SPI / QSPI / MICROWIRE / DSP compatible serial | SPI / QSPI / MICROWIRE / DSP compatible serial | The digital interface must match the host controller; identical serial interfaces ensure firmware and hardware compatibility. |
| Package / Case | 20-TSSOP | 20-TSSOP | Package footprint must match the PCB layout; identical packages allow direct board replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -55 °C to +125 °C | The temperature range defines the environments where the part is guaranteed to operate; the enhanced version supports wider military/industrial conditions. |
| Grade / Screening | Standard commercial/industrial grade | Enhanced product (EP) grade, up-screened | Enhanced screening provides additional testing and qualification for harsh or mission-critical applications, affecting reliability and cost. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7327BRUZ | AD7327TRU-EP |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | iCMOS® | iCMOS® |
| Part Status | Active | Obsolete |
| Number of Bits | 12 | 12 |
| Sampling Rate(Per Second) | 500k | 500k |
| Number of Inputs | 2, 3, 4 | 2, 3, 4 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential, Pseudo-Differential, Single Ended |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-S/H-ADC | MUX-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 | ±12V ~ 16.5V | ±12V ~ 16.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | Temperature Sensor, True Bipolar | Temperature Sensor, True Bipolar |
| Operating Temperature | -40°C ~ 85°C | -55°C ~ 125°C |
Frequently asked questions
What are the key differences between the AD7327BRUZ and AD7327TRU-EP?
Both parts are 8-channel, 12-bit plus sign successive-approximation ADCs with a bipolar input range and a serial interface, but they differ in temperature grade and screening. The AD7327BRUZ is the standard industrial-grade version in a 20-lead TSSOP, specified over the −40°C to +85°C range. The AD7327TRU-EP is an enhanced-product (EP) version screened to the extended −55°C to +125°C range and supplied in a 20-lead TSSOP. The EP version is intended for applications requiring extended temperature operation and is documented on its own datasheet.
Are the AD7327BRUZ and AD7327TRU-EP pin-compatible?
Yes. Both devices are offered in the same 20-lead TSSOP (RU-20) package with the same pinout, so the pin functions and PCB land pattern are identical. The difference is the temperature grade and screening level, not the package or pin assignment.
What is the resolution and input configuration of these ADCs?
Both are 12-bit plus sign successive-approximation ADCs with eight analog input channels. They support single-ended, true differential, and pseudo-differential input configurations, and accept bipolar input ranges of ±10 V, ±5 V, and ±2.5 V, selectable via the on-chip control register.
What is the specified operating temperature range for each part?
The AD7327BRUZ is specified over the −40°C to +85°C industrial temperature range. The AD7327TRU-EP is specified over the extended −55°C to +125°C range, which is the primary reason to select the EP version for harsh-environment designs.
Do both parts use the same serial interface and supply requirements?
Yes. Both use a SPI-compatible serial interface and operate from a single 2.7 V to 5.25 V VDD supply, with a separate VDRIVE pin for logic-level interfacing. The on-chip reference and conversion architecture are common to both grades, so firmware and interface timing are the same.
Can the AD7327TRU-EP be used as a drop-in replacement for the AD7327BRUZ?
Electrically and mechanically the two are interchangeable in the same 20-lead TSSOP footprint, and the EP version covers the industrial temperature range as a subset of its −55°C to +125°C specification. However, the EP part is a separately documented enhanced product, so the design should be validated against the AD7327TRU-EP datasheet, including any EP-specific screening or qualification notes, before substitution.
Which part should be selected for an extended-temperature application?
For operation beyond the −40°C to +85°C industrial range, the AD7327TRU-EP should be selected because it is specified and screened to −55°C to +125°C. The AD7327BRUZ is specified only to +85°C and should not be used outside its rated temperature range.