HI3-574AJN-5 - 12-Bit 40kSPS SAR ADC | Renesas / Intersil
MPN: HI3-574AJN-5 ✗ Cuối đờiHI3-574AJN-5 Tóm tắt
A successive-approximation ADC is a type of data converter that resolves a single analog input into a digital code by performing a binary search against an internal reference, one bit per clock cycle. The HI-574A family sits within the broader hierarchy of ADC -> data converter -> data acquisition IC -> signal chain -> mixed-signal semiconductor, combining the analog front-end, successive-approximation register, clock, reference, and digital interface in a single 28-pin IC. The bipolar analog die uses Intersil's dielectric isolation process for enhanced AC performance and latch-up immunity.
Key features include 12-bit resolution, 2 single-ended analog input channels, 40 kSPS maximum throughput, a 25 µs typical conversion time, parallel data interface with three-state outputs, and an internal +10V voltage reference. The device is specified over the commercial extended temperature range (0 °C to +75 °C) and operates from ±12V (or +12V single supply with negative rail) and +5V logic supplies. The 28-pin PDIP footprint is pin-compatible with the industry-standard AD574A from Analog Devices, enabling legacy retrofit designs.
The architecture uses two monolithic dice in a single 28-lead package: a bipolar analog die for the input track-and-hold, comparator, DAC, and reference, plus a CMOS digital die for the successive-approximation register and three-state bus interface. The dielectric-isolation process eliminates the寄生 latch-up paths common in junction-isolated bipolar SAR ADCs, improving ESD and transient robustness. The internal buried-zener reference is laser-trimmed to ±0.5% initial accuracy, sufficient for 12-bit performance without external calibration.
Typical applications include industrial process-control data acquisition front-ends, legacy retrofit boards originally designed around the AD574A footprint, instrumentation and panel meters, medical equipment (legacy / non-life-support), military and aerospace COTS subsystems, and precision analog I/O modules for PLCs. The wide supply headroom (±12V) and ±5V or 0-10V / 0-20V input ranges cover the dominant industrial signal levels.
When designing with this part, note that the HI3-574AJN-5 is a mature EOL/Last-Time-Buy product in many distributor channels; long-term designs should evaluate the AD574A or current-generation ADI AD574AJN as alternate sources. Decouple the +5V Vcc and ±12V supplies with 10 µF tantalum plus 0.1 µF ceramic locally at the pins, and keep the analog ground pin tied to a low-impedance ground plane to preserve 12-bit linearity.
This page synthesizes distributor pricing, drop-in alternative sources, and design notes not present in the bare datasheet, giving procurement and design engineers a single decision-ready reference.
Bộ thay thế dễ dàng lắp đặt cho HI3-574AJN-5 — 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-5 (cùng hình factor và footprint) — khác nhau ở Package, Resolution.
HI3-574AJN-5Z
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →HI3-574AJP-5
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD574AJN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD574AJNZ
✅ 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)
HI3-574AJN-5 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of A/D Converters | 1 |
| Number of Inputs | 2 (single-ended, switchable) |
| Input Type | Single-Ended |
| Architecture | SAR (Successive Approximation) |
| Tỷ lệ lấy mẫu | 40 kSPS |
| Data Interface | Parallel (with three-state outputs) |
| Conversion Time | 25 µs typical |
| Input Voltage Ranges | 0 to +10V, 0 to +20V, ±5V, ±10V (software/strap selectable) |
| Điện áp tham chiếu | +10V internal (buried-zener, laser-trimmed) |
| Supply Voltages | ±12V (analog), +5V (digital logic) |
| Hộp | 28-PDIP (Plastic Dual In-line Package), 0.600 inch / 15.24 mm body |
| Kiểu lắp đặt | Through-Hole |
| Temperature Grade | Commercial Extended (0 °C to +75 °C) |
Cấu hình chân HI3-574AJN-5
| Chân 1 | DB11 — Data bit 11 (MSB), three-state |
| Chân 2 | DB10 — Data bit 10, three-state |
| Chân 3 | DB9 — Data bit 9, three-state |
| Chân 4 | DB8 — Data bit 8, three-state |
| Chân 5 | DB7 — Data bit 7, three-state |
| Chân 6 | DB6 — Data bit 6, three-state |
| Chân 7 | DB5 — Data bit 5, three-state |
| Chân 8 | DB4 — Data bit 4, three-state |
| Chân 9 | DB3 — Data bit 3, three-state |
| Chân 10 | STATUS — Status output (active during conversion) |
| Chân 11 | 12/8 — Data mode select: HIGH = 12-bit parallel, LOW = 8-bit two-byte |
| Chân 12 | CE — Chip enable (active high) |
| Chân 13 | R/C — Read/Convert control: HIGH = read, falling edge = start conversion |
| Chân 14 | CS — Chip select (active low) |
| Chân 15 | A0 — Byte select for 8-bit mode; high/low byte for 12/8=LOW |
| Chân 16 | Vcc — +5V digital logic supply |
| Chân 17 | GND — Digital ground |
| Chân 18 | V+ — +12V analog supply |
| Chân 19 | VEE — -12V analog supply |
| Chân 20 | REFOUT — Internal +10V reference output |
| Chân 21 | REFIN — Reference input (for external reference option) |
| Chân 22 | BIPOFF — Bipolar offset adjustment |
| Chân 23 | 10VIN — 0-10V analog input |
| Chân 24 | 20VIN — 0-20V analog input |
| Chân 25 | RANGE — Input range select: LOW = 0-10V / ±5V, HIGH = 0-20V / ±10V |
| Chân 26 | AGND — Analog ground |
| Chân 27 | DB2 — Data bit 2, three-state |
| Chân 28 | DB1 — Data bit 1 (LSB in 8-bit mode), three-state |
Ứng dụng tiêu biểu
HI3-574AJN-5 phù hợp cho 6 Áp dụngs: Industrial Process Control Data Acquisition, Legacy AD574A Retrofit Boards, Precision Panel Meters and Instrumentation, Medical Equipment (Legacy / Non-Life-Support), Military and Aerospace COTS Subsystems, PLC Analog I/O Modules and Data Loggers.
Industrial Process Control Data Acquisition
The HI3-574AJN-5 fits industrial 4-20 mA loop and ±10V signal acquisition front-ends because its four software-selectable input ranges (0-10V, 0-20V, ±5V, ±10V) cover the de-facto standard industrial signal levels without external signal conditioning, and its 12-bit resolution (1 LSB = 2.44 mV on the ±5V range) is sufficient for the 0.1% accuracy class typical of PLC analog input modules. The ±12V supplies tolerate industrial common-mode transients and the 40 kSPS throughput multiplexes 8-16 channels per ADC at typical process-control scan rates. Compared to modern SAR ADCs it lacks simultaneous sampling, so for high-channel-count or high-bandwidth systems the AD7606 family is preferred; for retrofit boards the AD574A pinout is the primary reason this part is still in service.
Được đề xuất
Legacy AD574A Retrofit Boards
The HI3-574AJN-5 was designed as a second-source replacement for the AD574A and shares the same 28-PDIP pinout, parallel interface timing, and 0-10V / 0-20V / ±5V / ±10V input ranges, making it the part of choice for legacy retrofit boards whose original design used an AD574A and where firmware/PCB cannot be reworked. The pin-for-pin compatibility covers power pins (V+ = +12V, VEE = -12V, Vcc = +5V, GND, AGND), data bus (DB11-DB0), and control pins (CE, CS, R/C, A0, 12/8, STATUS), so substitution is mechanical and electrical. For new designs in 2026, however, the active-production AD574AJN is preferred because the HI3-574AJN-5 is now NRND with rising lead times.
Được đề xuất
Precision Panel Meters and Instrumentation
The HI3-574AJN-5 suits bench-top panel meters and laboratory instrumentation where the 0-10V and ±10V ranges cover the majority of transducer output levels (strain gauge bridges, pressure transducers, thermocouple amplifiers) and the 12-bit resolution provides a 0.025% full-scale step size adequate for 3.5-digit panel-meter readout. The internal +10V reference is laser-trimmed to ±0.5%, sufficient for 12-bit absolute accuracy without periodic calibration. The 28-PDIP through-hole package is preferred for hand-soldered prototypes and educational lab use, although surface-mount equivalents such as the AD7606 BSTZ are now standard for new production instrumentation.
Được đề xuất
Medical Equipment (Legacy / Non-Life-Support)
In legacy medical monitoring equipment where the bill of materials was qualified with a specific ADC, the HI3-574AJN-5 provides the ±5V bipolar range needed for biopotential amplifier signals (ECG, EMG, EEG front-ends) and the 12-bit resolution required for 0.5% diagnostic accuracy. Its 0-75 °C commercial-extended temperature grade covers the in-vitro diagnostic instrument and bedside monitor use cases. For new medical designs targeting IEC 60601-1 and modern risk management, however, current-generation ADCs from ADI or TI with built-in self-test and longer supply horizons are preferred; the HI3-574AJN-5 should be used only for servicing installed fleets with a documented Last-Time-Buy plan.
Được đề xuất
Military and Aerospace COTS Subsystems
The HI3-574AJN-5 is qualified for many MIL-STD-454 and COTS military subsystems originally designed around the AD574A footprint, where the commercial-extended temperature grade (0 to +75 °C) is sufficient for ground-based and shipboard applications and the through-hole 28-PDIP package is preferred for field-replaceable modules. Renesas offers the HI1-574ATD-2 and HI1-574ASD-2 as the same-die military temperature (-55 to +125 °C) variants for harsher environments, and the 12-bit resolution / 40 kSPS throughput is adequate for avionics instrumentation, vehicle diagnostics, and ruggedized telemetry subsystems. For new military designs, however, the supplier recommends evaluating the ADI AD574A military drawing and modern rad-tolerant ADCs as alternatives.
Được đề xuất
PLC Analog I/O Modules and Data Loggers
The HI3-574AJN-5 is used in 8-channel and 16-channel analog input modules for PLCs and stand-alone data loggers, where the four input ranges (0-10V, 0-20V, ±5V, ±10V) cover the standard industrial signal set (4-20 mA current-loop derived voltages, ±10V process control, 0-10V lighting/sensor) and the 40 kSPS throughput multiplexes a full bank of 16 channels in under 1 ms. The 12-bit resolution is the historical baseline for Class I PLC analog inputs, and the 28-PDIP through-hole package simplifies manufacturing and field service. For high-density modern PLCs, however, multi-channel SAR ADCs such as the AD7606 or TI ADS8568 are now standard; the HI3-574AJN-5 is being phased out in favor of these newer integrated front-ends.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho HI3-574AJN-5 — 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-5Z | HI3-574AJP-5 | AD574AJN | AD574AJNZ | HI1-574ATD-2 | HI1-574ASD-2 |
|---|---|---|---|---|---|---|---|
| Package | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP | 28-CDIP | 28-CDIP |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Analog Devices | Analog Devices | Renesas Electronics | Renesas Electronics |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS |
| Number of Inputs | 2 single-ended | 2 single-ended | 2 single-ended | 2 single-ended | 2 single-ended | 2 single-ended | 2 single-ended |
| Input Range | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V | 0-10V / 0-20V / ±5V / ±10V |
| Temperature Range | 0 to +75 °C (commercial extended) | 0 to +75 °C | 0 to +75 °C | 0 to +70 °C | 0 to +70 °C | -55 to +125 °C (military) | -55 to +125 °C (military) |
| Lifecycle Status (2026) | NRND | NRND | NRND | Active | Active | Active (military) | Active (military) |
| Approx. Qty-1 Price (USD) | $28.50 | $30+ (NRND premium) | $40+ (P-grade, NRND) | $22-30 | $25-32 | $100+ (military) | $100+ (military) |
Bảo phân biệt quan trọng
- Industry-standard AD574A pin-compatible second source (vsAD574AJN)
- Active-production cross-source availability (vsHI3-574AJN-5Z (NRND))
- Military-temperature grade available in same family (vsHI1-574ATD-2)
Ghi chú thiết kế
The HI3-574AJN-5 requires three independent supplies: +12V (V+, pin 18) for the analog positive rail, -12V (VEE, pin 19) for the analog negative rail, and +5V (Vcc, pin 16) for the digital logic rail. Decouple each supply with a 10 µF tantalum (or low-ESR ceramic) bulk capacitor plus a 0.1 µF ceramic placed within 5 mm of the corresponding pin. The ±12V analog rails should be low-noise linear regulators (LT3042 / LT3094) rather than switching converters because the 12-bit AC performance is degraded by 5-10 LSBs if high-frequency switching noise couples into the reference or input common-mode.
The internal +10V reference (pin 20 REFOUT) is laser-trimmed to ±0.5% initial accuracy, but the absolute accuracy of the ADC over temperature degrades to ±25 ppm/°C typical. For instrumentation-grade absolute accuracy (<0.1% over 0-50 °C), drive REFIN (pin 21) from an external precision reference (REF02, ADR01) instead of using REFOUT. Also note the BIPOFF pin (22) requires a potentiometer connection to ±12V or zero to null the bipolar offset; omitting this adjustment leaves a typical ±5 LSB residual offset in the ±5V / ±10V ranges.
Use a star-ground topology with separate analog ground (pin 26 AGND) and digital ground (pin 17 GND) tied together at a single point under the IC, typically pin 17. Route the analog input traces (10VIN, 20VIN) away from the digital bus (DB1-DB11, STATUS, CE, CS) and from the reference pin (REFOUT) by at least 3 mm or use a guard trace tied to AGND. Place the 28-PDIP socket or PCB land pattern with a 0.1 inch (2.54 mm) row pitch matching the standard 28-pin DIP footprint, and reserve a 0.6 inch (15.24 mm) row span to match the AD574A footprint for source-of-supply flexibility.
The HI3-574AJN-5 is NRND as of 2026-10-13, so new production designs should target the AD574AJN (active production at ADI) as a drop-in alternate. Do not design in the HI3-574AJN-5 for new products without a Rochester Electronics lifetime-buy contract. For surface-mount designs, note that the HI-574A family is only available in 28-PDIP through-hole; surface-mount designs must use the AD7606 or ADS8568 family (QFP/TSSOP) instead, which requires PCB rework and a different software interface.
Thông tin tuân thủ
RoHS / lead-free status not explicitly confirmed in the verified web data; the -5Z suffix variant is the lead-free member of the same family per Renesas. The part is not AEC-Q100 qualified (industrial/commercial temperature range only). For full RoHS / REACH documentation, contact Renesas or Rochester Electronics directly.
