AD674BTE/883B - 12-Bit SAR ADC, 28-CDIP | Analog Devices
MPN: AD674BTE/883B ✓ AktifAD674BTE/883B Ringkasan
An analog-to-digital converter (ADC) is an electronic component that converts a continuous analog voltage into a discrete digital representation. The AD674BTE/883B is a successive approximation register (SAR) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed and moderate resolution, making them ideal for industrial control, instrumentation, and data acquisition. The AD674B family is pin-compatible with the industry-standard AD574A but offers faster conversion time and lower power consumption.
Key features of the AD674BTE/883B include 12-bit resolution, a maximum conversion time of 15 µs, and an internal 10V reference. It accepts bipolar input ranges of ±5V and ±10V, as well as unipolar 0V to 10V and 0V to 20V, selectable via pin strapping. The device includes a three-state output buffer for direct bus interfacing and operates over the extended temperature range of -55°C to +125°C, meeting MIL-STD-883B standards.
Technically, the AD674BTE/883B integrates a precision voltage reference, clock, and comparator on-chip, reducing external component count. The SAR architecture ensures monotonicity and no missing codes over the full temperature range. The device features a 12-bit parallel output with a status pin (STS) that indicates conversion completion, simplifying microprocessor handshaking. The 28-pin CDIP package provides excellent thermal and mechanical stability for harsh environments.
Typical applications include military and aerospace data acquisition, industrial process control, medical instrumentation, and scientific analysis equipment. The device's wide operating temperature range and high reliability make it suitable for mission-critical systems where accuracy and durability are paramount.
When designing with the AD674BTE/883B, ensure proper decoupling of the power supplies and a clean analog ground plane to minimize noise. The internal reference can be overridden by an external reference for improved accuracy, but the internal reference is sufficient for most applications. The conversion start (CE, CS, R/C) control pins allow flexible timing, and the STS pin can be used to trigger interrupts or polling routines.
Alternatif penggantian untuk AD674BTE/883B — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
AD674BKNZ
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD774BTH
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
AD574AJD
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MX574ASE/883B
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADC774TH-BI
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
AD674BTE/883B Rating Maksimal & Karakteristik Listrik
| Resolusi | 12 bit |
| Number of Inputs | 2 |
| Input Type | Single Ended |
| Architecture | SAR |
| Conversion Time | 15 µs (max) |
| Analog Input Ranges | 0V to 10V, 0V to 20V, ±5V, ±10V |
| Reference Type | Internal, External |
| Internal Reference Voltage | 10V |
| Data Interface | Parallel |
| Tipe Output | Three-state |
| Tegangan Pemuat | +5V, ±12V |
| Rentang Suhu Kerja | -55°C to +125°C |
| Paket | 28-CDIP |
| Tipe Mounting | Through Hole |
| Status RoHS | Non-compliant |
Konfigurasi Pin AD674BTE/883B
| Pin produk 1 | VLOGIC — Logic supply voltage (5V) |
| Pin produk 2 | 12/8 — Data format select (12-bit or 8-bit) |
| Pin produk 3 | CS — Chip select (active low) |
| Pin produk 4 | A0 — Byte select / address input |
| Pin produk 5 | R/C — Read/Convert select |
| Pin produk 6 | CE — Chip enable (active high) |
| Pin produk 7 | VCC — Positive supply (+12V) |
| Pin produk 8 | REF OUT — Reference output (10V) |
| Pin produk 9 | AGND — Analog ground |
| Pin produk 10 | REF IN — Reference input |
| Pin produk 11 | VEE — Negative supply (-12V) |
| Pin produk 12 | BIP OFF — Bipolar offset |
| Pin produk 13 | 10V IN — Analog input (10V range) |
| Pin produk 14 | 20V IN — Analog input (20V range) |
| Pin produk 15 | DGND — Digital ground |
| Pin produk 16 | DB0 — Data bit 0 (LSB) |
| Pin produk 17 | DB1 — Data bit 1 |
| Pin produk 18 | DB2 — Data bit 2 |
| Pin produk 19 | DB3 — Data bit 3 |
| Pin produk 20 | DB4 — Data bit 4 |
| Pin produk 21 | DB5 — Data bit 5 |
| Pin produk 22 | DB6 — Data bit 6 |
| Pin produk 23 | DB7 — Data bit 7 |
| Pin produk 24 | DB8 — Data bit 8 |
| Pin produk 25 | DB9 — Data bit 9 |
| Pin produk 26 | DB10 — Data bit 10 |
| Pin produk 27 | DB11 — Data bit 11 (MSB) |
| Pin produk 28 | STS — Status output (conversion complete) |
Aplikasi Umum
AD674BTE/883B cocok untuk 6 aplikasis: Military Data Acquisition, Industrial Process Control, Medical Instrumentation, Scientific Analysis Equipment, Aerospace Test Systems, Automotive Test Equipment.
Military Data Acquisition
The AD674BTE/883B is ideal for military data acquisition systems due to its 12-bit resolution, 15 µs conversion time, and extended temperature range of -55°C to +125°C. Its ceramic CDIP package ensures reliability in harsh environments, and the internal reference simplifies design. The parallel interface allows direct connection to microprocessors, enabling rapid data logging in avionics and radar systems. The device's MIL-STD-883B compliance guarantees performance under extreme conditions, making it a trusted choice for defense applications.
Direkomendasikan
Industrial Process Control
In industrial process control, the AD674BTE/883B provides accurate 12-bit conversion of sensor signals such as temperature, pressure, and flow. Its unipolar and bipolar input ranges (0-10V, ±5V, etc.) accommodate various transducer outputs. The 15 µs conversion time enables real-time monitoring and control loops. The device's robust design and wide temperature range make it suitable for factory automation and power plant monitoring, where reliability is critical. The parallel output simplifies interfacing with PLCs and microcontrollers.
Direkomendasikan
Medical Instrumentation
The AD674BTE/883B is used in medical instrumentation such as patient monitors and diagnostic equipment, where accurate analog-to-digital conversion is essential. Its 12-bit resolution provides sufficient precision for vital sign monitoring, and the fast conversion time supports real-time data acquisition. The device's wide temperature range ensures stable operation in clinical environments. The internal reference reduces external component count, saving board space in compact medical devices. The parallel interface allows easy integration with digital signal processors.
Direkomendasikan
Scientific Analysis Equipment
In scientific analysis equipment like spectrometers and chromatographs, the AD674BTE/883B delivers reliable 12-bit conversion of analog signals. Its low noise and monotonicity ensure accurate measurements, while the 15 µs conversion time allows high-throughput data collection. The device's military-grade temperature range makes it suitable for laboratory environments with varying conditions. The internal reference provides a stable voltage for consistent results. The parallel output facilitates high-speed data transfer to analysis software.
Direkomendasikan
Aerospace Test Systems
The AD674BTE/883B is employed in aerospace test systems for monitoring and recording flight data. Its 12-bit resolution and 15 µs conversion time capture dynamic signals accurately. The device operates over -55°C to +125°C, withstanding the extreme temperatures of aerospace environments. The ceramic package provides mechanical robustness against vibration and shock. The parallel interface enables direct connection to flight computers, and the internal reference ensures stable operation without external components, reducing system complexity.
Direkomendasikan
Automotive Test Equipment
In automotive test equipment, the AD674BTE/883B is used for engine control unit (ECU) testing and sensor validation. Its 12-bit resolution and fast conversion time allow accurate measurement of voltage and current signals. The device's wide temperature range (-55°C to +125°C) suits under-hood and test chamber environments. The parallel interface simplifies integration with test benches, and the internal reference reduces external parts. The device's reliability ensures consistent performance in demanding automotive testing applications.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk AD674BTE/883B — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | AD674BKNZ | AD774BTH | MX574ASE/883B |
|---|---|---|---|---|
| Package | 28-CDIP | 28-PDIP | 28-CDIP | 28-CDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit |
| Conversion Time | 15 µs | 15 µs | 8 µs | 15 µs |
| Temperature Range | -55°C to +125°C | 0°C to +70°C | -55°C to +125°C | -55°C to +125°C |
| RoHS | Non-compliant | Compliant | Non-compliant | Non-compliant |
| Internal Reference | Yes (10V) | Yes (10V) | Yes (10V) | Yes (10V) |
| Input Ranges | 0-10V, 0-20V, ±5V, ±10V | 0-10V, 0-20V, ±5V, ±10V | 0-10V, 0-20V, ±5V, ±10V | 0-10V, 0-20V, ±5V, ±10V |
Diferensiator Kunci
- Military-grade temperature range (vsAD674BKNZ)
- Faster conversion than industry standard (vsAD574AJD)
- Ceramic package for harsh environments (vsAD674BKNZ)
Catatan Desain
The AD674BTE/883B requires three power supplies: +5V for logic, +12V for analog positive, and -12V for analog negative. Decouple each supply with 10 µF tantalum and 0.1 µF ceramic capacitors placed close to the device pins. The analog and digital grounds should be connected at a single point to minimize noise coupling. Ensure the +5V logic supply is stable, as it powers the output buffers.
For optimal performance, use a ground plane and separate analog and digital ground areas, connecting them at the ADC. Place the input signal source close to the analog input pins to reduce parasitic capacitance. Keep the reference output (REF OUT) and reference input (REF IN) traces short and shielded to avoid noise pickup. Bypass the reference pins with 0.1 µF ceramic capacitors.
A common mistake is leaving the BIP OFF pin unconnected when using unipolar input ranges. For unipolar operation, connect BIP OFF to AGND; for bipolar, leave it open. Also, ensure the 12/8 pin is set correctly for the desired data format (12-bit or 8-bit). Incorrect setting can cause data misalignment. Always verify the conversion status via the STS pin before reading data to avoid reading invalid outputs.
Informasi Konformitas
Military-grade device, not RoHS compliant due to lead-based solder in ceramic package.
