ADS574JE - 12-Bit 40kSPS SAR ADC | 28-PDIP | Texas Instruments
Référence : ADS574JE ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $25.95 | $25,95 |
| 10 | $23.2 | $232,00 |
| 100 | $19.85 | $1 985,00 |
| 250 | $18.4 | $4 600,00 |
| 500 | $16.95 | $8 475,00 |
ADS574JE Présentation
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.
Alternatives de remplacement direct pour ADS574JE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADS574JE (même facteur de forme et même empreinte) — différant par Operating Temperature, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADS574JP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS574JU
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS574KE
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS574JE
✅ Remplacement direct✓ En stock
$16.95 / unité
Voir la fiche technique →MX574AJN+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADS574JE Valeurs maximales et caractéristiques électriques
| Résolution | 12 bit |
| Architecture | SAR (Successive Approximation) |
| Fréquence d'échantillonnage | 40 kSPS |
| Number of Input Channels | 1 |
| Acquisition and Conversion Time | 25 µs max |
| Tension d'alimentation | +5 V (single supply) |
| Plage de tension d'entrée | 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) |
| Température de fonctionnement | 0 °C to +70 °C (commercial, J grade) |
| Boîtier | 28-pin PDIP through-hole |
| Technology | Low-power CMOS with CDAC array |
| Type de montage | Through-Hole |
| Statut RoHS | Compliant |
| Compatible Legacy Part | Drop-in replacement for ADC574 |
Configuration des broches de ADS574JE
| Broche 1 | VIN — Analog input |
| Broche 2 | AGND — Analog ground |
| Broche 3 | REF IN — Reference input (10V nominal) |
| Broche 4 | REF OUT — Internal 10V reference output |
| Broche 5 | BIPOLAR — Bipolar/unipolar range select |
| Broche 6 | 10VIN — 10V/20V input range select |
| Broche 7 | RANGE — Range select logic input |
| Broche 8 | AGND — Analog ground |
| Broche 9 | VCC — +5V analog supply |
| Broche 10 | DB11 (MSB) — Data bit 11 (MSB) |
| Broche 11 | DB10 — Data bit 10 |
| Broche 12 | DB9 — Data bit 9 |
| Broche 13 | DB8 — Data bit 8 |
| Broche 14 | DB7 — Data bit 7 |
| Broche 15 | DB6 — Data bit 6 |
| Broche 16 | DB5 — Data bit 5 |
| Broche 17 | DB4 — Data bit 4 |
| Broche 18 | DB3 — Data bit 3 |
| Broche 19 | DB2 — Data bit 2 |
| Broche 20 | DB1 — Data bit 1 |
| Broche 21 | DB0 (LSB) — Data bit 0 (LSB) |
| Broche 22 | DGND — Digital ground |
| Broche 23 | CS — Chip select (active low) |
| Broche 24 | R/C — Read/Convert control |
| Broche 25 | CE — Chip enable |
| Broche 26 | VCC — +5V digital supply |
| Broche 27 | STATUS — Conversion status (active low) |
| Broche 28 | DGND — Digital ground |
Applications typiques
ADS574JE convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADS574JE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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.) |
Principaux différenciateurs
- True 28-PDIP drop-in replacement for legacy ADC574 sockets (vs Modern ADS54xx SAR ADCs)
- Industrial (-40 °C to +85 °C) and military (-55 °C to +125 °C) siblings available in same package (vs ADS574JE alone)
- On-chip 10 V reference eliminates external reference components (vs Older bipolar ADC574 designs)
Notes de conception
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.
Informations de conformité
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.
