ADS574JE - 12-Bit 40kSPS SAR ADC | 28-PDIP | Texas Instruments
MPN: ADS574JE ✓ AktifADS574JE Ringkasan
A successive-approximation ADC (SAR ADC) is a type of Nyquist-rate data converter that uses a binary-search algorithm against an internal capacitor array to digitize an analog input one bit per clock cycle. SAR ADCs sit in the broader taxonomy of analog-to-digital converters, which also include delta-sigma, pipeline, and flash architectures; they are valued for their deterministic latency, lack of pipeline delay, and DC accuracy, making them ideal for multiplexed data-acquisition systems, industrial control loops, and instrumentation front ends.
Key features of the ADS574JE include 25 µs maximum acquisition and conversion time, bipolar/unipolar input ranges (0 to +10 V, 0 to +20 V, ±5 V, ±10 V), guaranteed AC and DC performance, internal sample-and-hold in most applications, and a CE-marked commercial temperature grade of 0 °C to +70 °C. The integrated reference eliminates the external reference resistor/capacitor network typically required by older bipolar ADCs, simplifying board layout.
Architecturally, the ADS574JE uses a CDAC that reuses the same capacitor array for both acquisition and conversion phases. This eliminates a separate sample-and-hold amplifier in most applications, reduces aperture uncertainty, and keeps the input-signal charge on the array with minimal droop. The result is a complete sampling ADC with deterministic, single-cycle conversion latency compatible with 8-bit and 16-bit microprocessor busses.
Typical applications include industrial process-control front ends, multiplexed data-acquisition systems, precision instrumentation, and drop-in upgrades for legacy ADC574 designs. The wide input-voltage range and microprocessor compatibility also make it suitable for retrofit of older -12-bit systems where through-hole 28-pin PDIP is preferred over modern surface-mount footprints.
When designing with this device, place the input bypass capacitors close to the analog input pins, keep digital returns separate from analog returns, and verify that the +5 V supply is well decoupled because the internal reference derives from VCC. Avoid driving the analog input beyond ±15 V during transients to protect the input ESD network.
This page synthesizes verified distributor availability, parametric drop-in alternatives (including the same-die ADS574JP and ADS574JU temperature-grade siblings), and practical design notes not packaged in the manufacturer datasheet, helping engineers evaluate the ADS574JE for both new designs and legacy ADC574 retrofits.
Alternatif penggantian untuk ADS574JE — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ADS574JE (sama faktor bentuk dan footprint) — berbeda di dalam Operating Temperature, Package.
ADS574JP
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS574JU
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADS574KE
✅ Drop-InKontak untuk harga
Lihat Datasheet →ADS574JE
✅ Drop-InKontak untuk harga
Lihat Datasheet →MX574AJN+
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADS574JE Rating Maksimal & Karakteristik Listrik
| Resolusi | 12 bit |
| Architecture | SAR (Successive Approximation) |
| Laju Pengambilan Sampel | 40 kSPS |
| Number of Input Channels | 1 |
| Acquisition and Conversion Time | 25 µs max |
| Tegangan Pemuat | +5 V (single supply) |
| Rentang Tegangan Masukan | 0 to +10 V, 0 to +20 V, ±5 V, ±10 V |
| On-chip Reference | Yes (internal) |
| On-chip Clock | Yes (internal) |
| Microprocessor Interface | 8-bit and 16-bit compatible |
| Sample/Hold | Internal (eliminates external S/H in most apps) |
| Suhu Kerja | 0 °C to +70 °C (commercial, J grade) |
| Paket | 28-pin PDIP through-hole |
| Technology | Low-power CMOS with CDAC array |
| Tipe Mounting | Through-Hole |
| Status RoHS | Compliant |
| Compatible Legacy Part | Drop-in replacement for ADC574 |
Konfigurasi Pin ADS574JE
| Pin produk 1 | VIN — Analog input |
| Pin produk 2 | AGND — Analog ground |
| Pin produk 3 | REF IN — Reference input (10V nominal) |
| Pin produk 4 | REF OUT — Internal 10V reference output |
| Pin produk 5 | BIPOLAR — Bipolar/unipolar range select |
| Pin produk 6 | 10VIN — 10V/20V input range select |
| Pin produk 7 | RANGE — Range select logic input |
| Pin produk 8 | AGND — Analog ground |
| Pin produk 9 | VCC — +5V analog supply |
| Pin produk 10 | DB11 (MSB) — Data bit 11 (MSB) |
| Pin produk 11 | DB10 — Data bit 10 |
| Pin produk 12 | DB9 — Data bit 9 |
| Pin produk 13 | DB8 — Data bit 8 |
| Pin produk 14 | DB7 — Data bit 7 |
| Pin produk 15 | DB6 — Data bit 6 |
| Pin produk 16 | DB5 — Data bit 5 |
| Pin produk 17 | DB4 — Data bit 4 |
| Pin produk 18 | DB3 — Data bit 3 |
| Pin produk 19 | DB2 — Data bit 2 |
| Pin produk 20 | DB1 — Data bit 1 |
| Pin produk 21 | DB0 (LSB) — Data bit 0 (LSB) |
| Pin produk 22 | DGND — Digital ground |
| Pin produk 23 | CS — Chip select (active low) |
| Pin produk 24 | R/C — Read/Convert control |
| Pin produk 25 | CE — Chip enable |
| Pin produk 26 | VCC — +5V digital supply |
| Pin produk 27 | STATUS — Conversion status (active low) |
| Pin produk 28 | DGND — Digital ground |
Aplikasi Umum
ADS574JE cocok untuk 6 aplikasis: Industrial Process Control Front End, Multiplexed Data Acquisition System, Precision Instrumentation, Legacy ADC574 Retrofit Upgrade, Motor Control Feedback Loop, Medical Patient Monitoring Equipment.
Industrial Process Control Front End
The ADS574JE fits 4-20 mA loop and ±10 V industrial signal acquisition, providing 12-bit accuracy at 40 kSPS through its integrated SAR core. The four factory-selectable input ranges (0-10 V, 0-20 V, ±5 V, ±10 V) cover most PLC analog-input card spans directly. Its on-chip reference and clock eliminate external components, simplifying the analog front end and reducing BOM cost in PLC and DCS analog input modules.
Direkomendasikan
Multiplexed Data Acquisition System
For multi-channel data-acquisition cards, the ADS574JE's 25 µs conversion time and deterministic SAR latency simplify channel-switching software. Designers can pair the ADC with an external analog multiplexer (e.g., 4051-family) to expand channel count. The internal sample-and-hold on the CDAC array eliminates the external S/H amp needed by older bipolar ADCs, saving board area in compact DAQ boards.
Direkomendasikan
Precision Instrumentation
Bench-top DMMs, chart recorders, and laboratory instrumentation benefit from the ADS574JE's guaranteed AC and DC performance and integrated reference. The 12-bit resolution is sufficient for many precision instruments when paired with front-end gain stages and offset trimming. The microprocessor-compatible interface simplifies connection to legacy 8-bit and 16-bit microcontrollers used in instrument front-panel controllers.
Direkomendasikan
Legacy ADC574 Retrofit Upgrade
The ADS574JE is positioned as a drop-in replacement for the legacy ADC574, with the same 28-pin PDIP footprint and a microprocessor-compatible interface. Engineers maintaining older industrial systems can swap the JE onto an existing ADC574 socket without board rework. The internal sample-and-hold in the CDAC array removes the external S/H amp requirement, simplifying the surrounding circuit while preserving the original mechanical layout.
Direkomendasikan
Motor Control Feedback Loop
Motor-drive current and position feedback loops can use the ADS574JE for digitizing analog feedback signals at up to 40 kSPS. The single-cycle SAR conversion avoids the multi-cycle latency of pipeline ADCs, enabling cleaner control loops. The ±10 V and 0-20 V input ranges cover typical resolver/encoder-feedback levels, and the integrated reference keeps the analog front end compact inside the motor-drive enclosure.
Direkomendasikan
Medical Patient Monitoring Equipment
Patient monitoring devices such as ECG, blood-pressure, and temperature measurement systems can use the ADS574JE for low-speed analog signal digitizing at 12-bit resolution. The 40 kSPS sampling rate is well-matched to physiological signal bandwidths, and the integrated reference reduces calibration drift between channels. The 28-PDIP package simplifies through-hole construction favored in some medical instrumentation layouts.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADS574JE — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADS574JP | ADS574JU | ADS574KE | MX574AJN+ |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Maxim Integrated |
| Package | 28-PDIP | 28-PDIP (same) | 28-PDIP (same) | 28-PDIP (same) | 28-PDIP (same) |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Operating Temperature | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C (Industrial) | -55 °C to +125 °C (Military) | 0 °C to +70 °C (Commercial, K grade) | 0 °C to +70 °C |
| Architecture | SAR (CDAC) CMOS | SAR (CDAC) CMOS | SAR (CDAC) CMOS | SAR (CDAC) CMOS | SAR BiCMOS |
| Internal Reference | Yes (10 V) | Yes (10 V) | Yes (10 V) | Yes (10 V) | Yes |
| Input Ranges | 0-10 V / 0-20 V / ±5 V / ±10 V | 0-10 V / 0-20 V / ±5 V / ±10 V | 0-10 V / 0-20 V / ±5 V / ±10 V | 0-10 V / 0-20 V / ±5 V / ±10 V | 0-10 V / 0-20 V / ±5 V / ±10 V |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V / ±12 V |
| Unit Price (qty-1) | $25.95 | $28-32 (typ.) | $60-120 (typ., MIL grade) | $30-40 (typ.) | $35-50 (typ.) |
Diferensiator Kunci
- True 28-PDIP drop-in replacement for legacy ADC574 sockets (vsModern ADS54xx SAR ADCs)
- Industrial (-40 °C to +85 °C) and military (-55 °C to +125 °C) siblings available in same package (vsADS574JE alone)
- On-chip 10 V reference eliminates external reference components (vsOlder bipolar ADC574 designs)
Catatan Desain
Estimated: The ADS574JE draws approximately 100 mW typical from the +5 V supply while converting. Place a 10 µF tantalum and 0.1 µF ceramic decoupling pair close to VCC pin 26 (digital) and pin 9 (analog). The internal reference is derived from VCC, so any supply noise above ~10 kHz will couple directly into the conversion result; a low-noise LDO is recommended if the system 5 V rail is shared with digital logic.
Keep the analog input trace to pin 1 short, and route it away from the digital data bus (pins 10-21) and the digital supply. Use a single-point ground tie between analog ground (pins 2, 8) and digital ground (pins 22, 28) near the ADC, with the analog ground pour surrounding the analog input and reference pins. Avoid running the STATUS or R/C lines across the analog input trace.
Do not omit the 50 Ω resistor between REF OUT and REF IN — the datasheet specifies this trims the internal reference. Leaving REF IN floating will cause gain error. Also do not exceed ±15 V transient on the analog input; the input ESD network is not designed for industrial surge levels without a series resistor or TVS clamp. Always verify R/C, CE, and CS logic timing against the datasheet's timing diagram before firmware integration.
Informasi Konformitas
RoHS compliant per Texas Instruments product page. Not AEC-Q100 qualified (industrial/J grade only, 0 °C to +70 °C); choose ADS574JP for industrial temperature grade.
