ADS574JPG4 - 12-Bit 40kSPS SAR ADC, 28-PDIP | Texas Instruments
MPN: ADS574JPG4 ✓ Hoạt độngADS574JPG4 Tóm tắt
A SAR ADC is a member of the data-converter family that performs a binary search across an internal capacitive digital-to-analog converter (CDAC) to digitize an input sample in N clock cycles, where N is the resolution in bits. Compared with successive-approximation converters, the ADS574 family combines compact architecture with low power consumption and the ability to operate from a single +5 V supply (with an optional -15 V negative rail for bipolar input ranges). SAR ADCs occupy the middle ground between flash converters (very fast, low resolution) and sigma-delta converters (very high resolution, low bandwidth), and are widely used for industrial process control, instrumentation, and data-acquisition front-ends.
Key features include ±1 LSB linearity (0.0244%), on-chip sample-and-hold, 0V to +10V, 0V to +20V, or ±5V/±10V input ranges (software-configurable), three-state outputs for direct microprocessor bus connection, and a -40 °C to +85 °C operating temperature range. The 'G4' suffix indicates PB-free assembly with the standard 28-pin PDIP form factor, which remains a popular through-hole choice for legacy industrial, instrumentation, and breadboard-friendly designs where socketed replacement, mechanical robustness, or hand-prototyping is preferred over SMT.
The device is a drop-in CMOS successor for legacy ADC574 hybrid converters, providing internal sampling and much lower power consumption with single-supply operation. Its versatile digital interface supports stand-alone operation as well as direct connection to 8080-, 6800-, and 16-bit microprocessors, simplifying both new designs and field retrofits of legacy boards.
Typical applications include industrial process-control data acquisition, portable measurement instrumentation, motor-control feedback loops, and replacement of older hybrid ADC574/AD574A modules. The through-hole 28-PDIP package makes it especially suited for prototyping, test equipment, and legacy industrial systems where socketed ICs ease field replacement.
When designing with this part, ensure the analog input remains within the selected bipolar or unipolar range and that proper anti-alias filtering precedes the analog input pin. Decoupling with 10 µF and 0.1 µF capacitors close to the supply pins is mandatory to limit digital switching noise on the reference and to preserve linearity.
This page synthesizes Verified Web Data, distributor pricing, drop-in alternates drawn from published cross-references, and practical design guidance not aggregated on a single manufacturer or distributor page.
Bộ thay thế dễ dàng lắp đặt cho ADS574JPG4 — 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 ADS574JPG4 (cùng hình factor và footprint) — khác nhau ở Data Interface, Package / Case, RoHS Status, Mounting Type, Operating Temperature.
ADS574KP
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADS574JP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD574AUD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD574ASD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD1674BR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADS574JPG4 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of Input Channels | 1 |
| ADC Architecture | SAR (Successive Approximation Register) |
| Tỷ lệ lấy mẫu | 40 kSPS |
| Acquisition + Conversion Time | 25 µs max |
| Data Interface | Parallel (microprocessor-compatible) |
| Input Voltage Ranges | 0 to +10 V / 0 to +20 V / ±5 V / ±10 V (configurable) |
| Linearity Error | ±1 LSB max (0.0244%) |
| Number of Analog Inputs | 1 single-ended |
| Hộp / Vỏ | 28-DIP (0.600 in / 15.24 mm row spacing) |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Điện áp cung cấp | +5 V (with optional -15 V for bipolar input ranges) |
| Kiểu lắp đặt | Through-Hole |
| Packaging | Tube |
| Trạng thái RoHS | Unknown (verify via Distributor) |
| Lead-Free (Pb-Free) | Yes (G4 suffix denotes Pb-free assembly) |
Cấu hình chân ADS574JPG4
| Chân 1 | DB11 (MSB) — Three-state data bus, bit 11 (MSB) |
| Chân 2 | DB10 — Three-state data bus, bit 10 |
| Chân 3 | DB9 — Three-state data bus, bit 9 |
| Chân 4 | DB8 — Three-state data bus, bit 8 |
| Chân 5 | DB7 — Three-state data bus, bit 7 |
| Chân 6 | DB6 — Three-state data bus, bit 6 |
| Chân 7 | DB5 — Three-state data bus, bit 5 |
| Chân 8 | DB4 — Three-state data bus, bit 4 |
| Chân 9 | DB3 — Three-state data bus, bit 3 |
| Chân 10 | DB2 — Three-state data bus, bit 2 |
| Chân 11 | DB1 — Three-state data bus, bit 1 |
| Chân 12 | DB0 (LSB) — Three-state data bus, bit 0 (LSB) |
| Chân 13 | STS — Status output (active low, conversion complete) |
| Chân 14 | R/C — Read/Convert input |
| Chân 15 | CS — Chip Select (active low) |
| Chân 16 | VLOGIC — Logic supply (+5 V) |
| Chân 17 | GND — Digital ground |
| Chân 18 | VCC — Positive supply (+5 V, +12 V or +15 V) |
| Chân 19 | VEE — Negative supply (-12 V or -15 V for bipolar inputs) |
| Chân 20 | REF IN — Reference input / internal reference output (10 V) |
| Chân 21 | REF OUT — Reference output (10 V reference) |
| Chân 22 | AGND — Analog ground |
| Chân 23 | BIP OFF — Bipolar offset adjust |
| Chân 24 | 10V IN — Analog input, 10 V range |
| Chân 25 | 20V IN — Analog input, 20 V range |
| Chân 26 | BIP IN — Analog input, bipolar input |
| Chân 27 | GAIN — Gain adjust input |
| Chân 28 | SENSE — Analog input range selector |
Ứng dụng tiêu biểu
ADS574JPG4 phù hợp cho 6 Áp dụngs: Industrial Process-Control Data Acquisition, Weighing Scales and Strain-Gauge Instrumentation, Motor-Speed and Position Feedback Loops, Portable Measurement and Test Equipment, Legacy ADC574 / AD574A Board-Level Replacement, Precision Analog Front-End for Microprocessor Bus.
Industrial Process-Control Data Acquisition
The ADS574JPG4's 12-bit resolution, ±10 V bipolar input range support, and 25 µs conversion time directly suit industrial PLCs and process-control loops digitizing 4-20 mA-derived signals. Its on-chip reference and microprocessor-compatible parallel bus let designers bolt it onto 8080/6800 MCUs without external sample-and-hold circuitry, while the 28-pin PDIP is friendly to legacy backplanes. Through-hole mounting simplifies field replacement in plant-floor instrumentation where socketed ICs reduce MTTR.
Được đề xuất
Weighing Scales and Strain-Gauge Instrumentation
Bipolar ±10 V input capability and 12-bit resolution deliver adequate dynamic range for load-cell readout and weighing-scale front-ends when paired with an external instrumentation amplifier. The ADS574JPG4's on-chip reference and parallel interface remove the need for a precision external reference, reducing BOM cost. Through-hole 28-PDIP keeps the analog front-end on a socketed, easily serviceable assembly in laboratory balances.
Được đề xuất
Motor-Speed and Position Feedback Loops
40 kSPS throughput and sub-25 µs latency allow the ADS574JPG4 to digitize resolver-derived or tachogenerator-derived feedback in DC and AC servo drives. Its ±5 V/±10 V input ranges accept the bipolar encoder emulator outputs commonly used in industrial motion-control servo loops. The microprocessor parallel interface simplifies connection to legacy DSP and motion-controller ICs.
Được đề xuất
Portable Measurement and Test Equipment
Single +5 V supply operation (for unipolar inputs) makes the ADS574JPG4 attractive for portable digital multimeters, data loggers and field-test gear. Its 25 µs conversion time supports sample rates up to 40 kSPS in handheld data-acquisition front-ends. The through-hole PDIP package is robust against thermal-mechanical stress in portable enclosures, simplifying rework.
Được đề xuất
Legacy ADC574 / AD574A Board-Level Replacement
The ADS574JPG4 is explicitly designed as a CMOS drop-in for the legacy hybrid ADC574 and AD574A modules per the TI ADS574 datasheet, providing equivalent 12-bit/25 µs performance with much lower power consumption. Existing 28-pin DIP footprints on legacy industrial, medical, and aerospace boards can be retrofitted without PCB redesign. The on-chip reference eliminates hybrid module calibration steps.
Được đề xuất
Precision Analog Front-End for Microprocessor Bus
Parallel 12-bit data bus, three-state outputs and dedicated control strobes let the ADS574JPG4 interface directly to 8-bit and 16-bit microprocessor buses, simplifying ADC front-ends on instrumentation controllers. Built-in reference and sample-and-hold reduce external analog BOM while preserving 0.0244% linearity. The DIP-28 footprint is ideal for educational laboratories teaching ADC-to-MP integration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADS574JPG4 — 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 | ADS574KP | ADS574JP | AD574AUD | AD574ASD |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Package | 28-PDIP (0.600 in) | 28-PDIP (0.600 in) | 28-PDIP (0.600 in) | 28-CDIP (0.600 in) | 28-CDIP (0.600 in) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS | 40 kSPS |
| Conversion Time | 25 µs max | 25 µs max | 25 µs max | 25 µs max | 25 µs max |
| Architecture | SAR CMOS | SAR CMOS | SAR CMOS | SAR Bipolar Hybrid | SAR Bipolar Hybrid |
| Operating Temperature | -40°C to +85°C | 0°C to +70°C | -40°C to +85°C | -55°C to +125°C | -55°C to +125°C |
| Lead-Free (Pb-Free) | Yes (G4 suffix) | No (standard) | No (standard) | No (legacy) | No (legacy) |
Bảo phân biệt quan trọng
- Drop-in CMOS upgrade for legacy ADC574/AD574A hybrid modules (vsAD574AUD (Analog Devices))
- Industrial temperature range with Pb-free assembly (vsADS574KP (0-70°C commercial version))
- Configurable input ranges with on-chip reference and clock (vsExternal reference + clock + sample/hold design typical of legacy AD574 hybrids)
Ghi chú thiết kế
The ADS574JPG4 requires a stable +5 V digital supply on VLOGIC (pin 16) and typically +12 V or +15 V on VCC (pin 18). For bipolar ±5 V or ±10 V input ranges, VEE (pin 19) must be tied to -12 V or -15 V. Decouple each supply pin with a 10 µF tantalum in parallel with a 0.1 µF ceramic placed within 5 mm of the IC; this bypasses the internal CMOS logic noise that would otherwise couple into the reference and degrade ±1 LSB linearity.
Keep the AGND (pin 22) and GND (pin 17) planes joined at a single point near the IC, not as a widely distributed ground plane. Route the analog input traces (10V IN, 20V IN, BIP IN) directly to the IC without crossing digital data-bus traces DB0-DB11 to minimize capacitive coupling and preserve the rated ±1 LSB linearity. A guard ring around the analog inputs tied to AGND improves noise rejection.
The three-state parallel output bus is rated for direct 8-bit and 16-bit microprocessor interface (8080/6800 family). Wire DB11-DB8 to the high-byte data bus and DB7-DB0 to the low-byte data bus for 16-bit systems. Use the active-low Chip Select (CS, pin 15) and R/C (pin 14) together to avoid bus contention; read access during a conversion will return random data, so gate reads with STS (pin 13).
Do not exceed the input voltage limits on the 10V/20V/BIP pins: ±25 V absolute maximum with supplies off. For bipolar inputs without the -15 V VEE rail, output codes saturate but linearity is lost; always power VEE when reading ±5 V or ±10 V input ranges. The internal 10 V reference (pin 21) cannot drive large loads; buffer it through a precision op-amp if multiple loads must share the reference.
Thông tin tuân thủ
G4 suffix indicates Pb-free assembly per TI ordering nomenclature. RoHS and REACH certificates must be requested from TI or the distributor before production. Not AEC-Q100 qualified - this part targets industrial instrumentation, not automotive.
