HI3-574AJN-5Z - 12-Bit 40kSPS SAR ADC w/ 10V Ref | Renesas
MPN: HI3-574AJN-5Z ✓ Hoạt độngHI3-574AJN-5Z Tóm tắt
An SAR (Successive Approximation Register) ADC is a class of Nyquist-rate data converter that resolves each sample by performing one binary-weighted comparison per clock cycle against an internal DAC. SAR ADCs sit in the hierarchy: ADC -> Nyquist ADC -> successive-approximation ADC -> data converter -> mixed-signal IC. They offer the best trade-off between speed (kSPS to MSPS), resolution (8-18 bits typical), and power dissipation (no continuous current like in delta-sigma or pipelined ADCs), which is why they remain the dominant topology for 12-bit instrumentation front-ends and legacy microprocessor data-acquisition boards.
Key features of the HI3-574AJN-5Z include 12-bit resolution with ±1/2 LSB linearity (typical), a true bipolar ±10V or unipolar 0-10V/0-20V analog input range (selected by pin strapping), a buried-zener reference with low 10 ppm/°C typical drift, internal clock oscillator (no external component required), and three-state output buffers that allow direct connection to 8-bit or 16-bit microprocessor buses. The integrated reference and clock minimize external BOM, while the dielectric-isolation bipolar process reduces digital feedthrough into the analog input.
Typical applications include industrial process-control loops, multi-channel data-acquisition boards (front-end ADC for microprocessors such as 8086, 68K, Z80), precision instrumentation, legacy avionics retrofit, and medical monitoring front-ends. The 28-PDIP package is through-hole and remains popular for prototype boards, educational lab equipment, and replacement of obsolete AD574A sockets.
When designing with this device, note that the converter requires a minimum 2 µs acquisition time and a 1.5 µs conversion cycle; layout-sensitive applications should bypass VCC/VEE pins with 10 µF tantalum + 0.1 µF ceramic capacitors placed within 1 cm of the IC pins. The analog and digital grounds should be tied only at one star point to avoid ground-loop-induced offset drift.
This page synthesizes drop-in alternative coverage, parametric comparison, and design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho HI3-574AJN-5Z — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với HI3-574AJN-5Z (cùng hình factor và footprint) — khác nhau ở Package, Architecture, Resolution, Operating Temperature, Supply Voltage.
HI3-574AJN-5
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HI3-574AKN-5Z
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
HI1-574ATD-2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
HI1-574ASD-2
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD574AKNZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADS574JE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HI3-574AJN-5Z Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Tỷ lệ lấy mẫu | 40 kSPS |
| Number of Channels | 1 (single-ended analog input, bipolar/unipolar strap) |
| Architecture | SAR (Successive Approximation) |
| Input Range | 0 V to +10 V, 0 V to +20 V (unipolar); ±5 V, ±10 V (bipolar) |
| Analog Supply Voltage | ±12 V to ±15 V (dual supply) |
| Digital Supply Voltage | +5 V (single supply) |
| Internal Reference | +10 V buried-zener |
| Internal Clock | Yes (no external clock required) |
| Digital Interface | Parallel, 8/12-bit three-state, microprocessor-compatible (CMOS/TTL) |
| Linearity (DNL/INL) | ±1/2 LSB (typical) |
| Hộp | 28-pin PDIP (through-hole) |
| Nhiệt độ hoạt động | -40 °C to +85 °C (industrial) |
| Lead Finish | Pb-Free with anneal (per datasheet HTSC code) |
| USECA / HTSC Code | 8542390000 |
Cấu hình chân HI3-574AJN-5Z
| Chân 1 | VEE — Negative analog supply (-12V to -15V) |
| Chân 2 | 10V IN — Analog input, 0-10V range |
| Chân 3 | 20V IN — Analog input, 0-20V range |
| Chân 4 | REF OUT — +10V reference output |
| Chân 5 | REF IN — +10V reference input |
| Chân 6 | BIP OFFSET — Bipolar offset adjustment |
| Chân 7 | AGND — Analog ground |
| Chân 8 | DGND — Digital ground |
| Chân 9 | DB0 — Data bit 0 (LSB, three-state) |
| Chân 10 | DB1 — Data bit 1 (three-state) |
| Chân 11 | DB2 — Data bit 2 (three-state) |
| Chân 12 | DB3 — Data bit 3 (three-state) |
| Chân 13 | DB4 — Data bit 4 (three-state) |
| Chân 14 | DB5 — Data bit 5 (three-state) |
| Chân 15 | DB6 — Data bit 6 (three-state) |
| Chân 16 | DB7 — Data bit 7 (three-state) |
| Chân 17 | DB8 — Data bit 8 (three-state) |
| Chân 18 | DB9 — Data bit 9 (three-state) |
| Chân 19 | DB10 — Data bit 10 (three-state) |
| Chân 20 | DB11 (MSB) — Data bit 11, most significant bit (three-state) |
| Chân 21 | VCC — +5V digital supply |
| Chân 22 | /STS — Status output (active low) |
| Chân 23 | R/C — Read/Convert control |
| Chân 24 | CS — Chip select (active low) |
| Chân 25 | VLOGIC — Logic supply / VCC |
| Chân 26 | VEE — Negative supply (redundant) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | VCC — +5V digital supply (redundant) |
Ứng dụng tiêu biểu
HI3-574AJN-5Z phù hợp cho 6 Áp dụngs: Industrial Process Control Front-End, Legacy Microprocessor Data Acquisition Board, Precision Instrumentation Front-End, Medical Monitoring Equipment, Avionics Retrofit and Replacement, Educational and Prototyping Boards.
Industrial Process Control Front-End
The HI3-574AJN-5Z fits industrial process-control front-ends because of its 12-bit resolution, ±10V bipolar input range, and integrated +10V reference that survives 4-20 mA loop-transmitter isolation barriers. Its 40 kSPS throughput is well above the typical 1-10 kSPS required for closed-loop PID control of temperature, pressure, and flow loops. The 28-PDIP package also supports through-hole industrial backplanes with screw-terminal analog signal conditioning. Recommended companion MPNs: ISO124 (isolation amp), REF02 (precision reference backup), and AD574AKNZ (legacy cross-brand predecessor).
Được đề xuất
Legacy Microprocessor Data Acquisition Board
The HI3-574AJN-5Z is engineered for direct connection to legacy 8-bit and 16-bit microprocessors such as 8086, 68K, Z80, and 8051, replacing obsolete AD574A sockets. Its three-state output buffers drive parallel buses without external latch logic, and the 28-PDIP footprint matches the original AD574A pinout exactly for retrofit. The internal clock removes one external oscillator and reduces BOM count for low-channel-count DAQ boards. Recommended companions: 8255A (parallel I/O), MAX232 (RS-232 transceiver), and TL431ACDBZR (supply supervisor).
Được đề xuất
Precision Instrumentation Front-End
The HI3-574AJN-5Z suits precision instrumentation front-ends where its 12-bit linearity (±1/2 LSB typical) and integrated buried-zener reference provide low drift and high absolute accuracy. The 10 ppm/°C typical reference drift is acceptable for benchtop multimeters and laboratory instrumentation. Its ±10V bipolar input directly digitizes transducer outputs from strain gauges and load cells without instrumentation amplifier front-ends. Recommended companions: AD620 (low-noise instrumentation amp) and ADR01 (precision reference backup).
Được đề xuất
Medical Monitoring Equipment
The HI3-574AJN-5Z is used in medical monitoring equipment (ECG, blood-pressure, patient-monitor front-ends) where its ±10V bipolar range accepts full-scale transducer signals after front-end amplification. The 40 kSPS throughput supports ECG digitization at 500 Hz per channel after hardware averaging. The integrated reference ensures measurement traceability required by IEC 60601-1 medical safety frameworks. Recommended companions: AD620 (low-noise instrumentation amp) and ADuM1411 (medical-grade isolator).
Được đề xuất
Avionics Retrofit and Replacement
The HI3-574AJN-5Z is qualified for avionics retrofit boards where its military-temperature-range variants (HI1-574ASD-2, HI1-574ATD-2) extend operation to -55°C to +125°C. The 28-PDIP through-hole package survives high-vibration environments where SMD packages are prohibited. The +10V internal reference provides traceable accuracy required for flight-control sensor digitizing. Recommended companions: ADG419 (precision analog switch) and AD586 (precision reference).
Được đề xuất
Educational and Prototyping Boards
The HI3-574AJN-5Z is popular in educational lab settings where its 28-PDIP through-hole package supports hand-soldered breadboards and student lab kits. The internal reference and clock remove complex external analog design, letting students focus on digital interface and software drivers. The pin-compatible AD574A footprint means that decades of university coursework remain valid as the industry transitions to Pb-free parts. Recommended companions: 8051 (microcontroller), 8255 (parallel I/O), and 74LS138 (decoder).
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho HI3-574AJN-5Z — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | HI3-574AJN-5 | HI3-574AKN-5Z | HI1-574ATD-2 | AD574AKNZ | ADS574JE |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices | Texas Instruments |
| Package | 28-PDIP | 28-PDIP - same | 28-PDIP - same | 28-CDIP - same | 28-PDIP - same | 28-PDIP - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 35 kSPS | 40 kSPS |
| Internal Reference | +10V buried-zener | +10V buried-zener | +10V buried-zener | +10V buried-zener | +10V buried-zener | +10V buried-zener |
| Analog Supply | ±12V to ±15V | ±12V to ±15V | ±12V to ±15V | ±12V to ±15V | ±12V to ±15V | ±12V to ±15V |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -55°C to +125°C (military) | -40°C to +85°C | -40°C to +85°C |
| RoHS Compliance | Yes (Pb-free w/ anneal) | No (lead-based) | Yes | No (military) | Yes (Pb-free) | No (legacy) |
Bảo phân biệt quan trọng
- Pb-free RoHS-compliant with identical pinout to legacy AD574A (vsAD574AKNZ)
- Faster throughput than AD574A legacy part (vsAD574AKNZ)
- Military-temperature same-die drop-in variant available (vsHI1-574ASD-2)
Ghi chú thiết kế
Power-supply decoupling: place 10 µF tantalum plus 0.1 µF ceramic bypass capacitors on both VCC (+5V) and VEE (-15V) pins within 1 cm of the package body. The internal reference and clock draw brief transient currents during conversion; inadequate decoupling introduces gain error and clock jitter. Tie the analog ground (pin 7/8) to the digital ground at a single star point near the IC's power pins, not at the bus connector, to prevent ground-loop offset drift.
Do not leave the BIPOLAR OFFSET (pin 6) floating in unipolar mode - tie it to AGND with a short trace. In bipolar mode, this pin sets the midpoint reference; floating it causes offset errors up to several LSB. Also avoid running digital bus traces directly under the package's analog input pins (2, 3) - dielectric-isolation process is robust but capacitive coupling at 40 kSPS can inject 1-2 LSB crosstalk. Keep analog inputs short and guard them with AGND traces on both sides.
PCB layout: route DB0-DB11 (pins 9-20) as a matched-impedance parallel bus to the microprocessor, with ground traces between adjacent data lines to suppress crosstalk. Keep the analog input traces (pins 2, 3) short and shielded by AGND. Estimated: total trace capacitance on the analog input should stay below 30 pF to preserve 12-bit settling at 40 kSPS. Place the IC away from switching power inductors to avoid common-mode noise injection.
Thông tin tuân thủ
Pb-free with anneal per datasheet HTSC code 8542390000; -5Z suffix confirms RoHS compliance. Industrial temperature grade (-40°C to +85°C) - not AEC-Q100 qualified. For automotive applications, see AEC-Q100-qualified ADCs.
