AD974BN - 4-Channel 16-Bit 200 kSPS ADC | Analog Devices
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AD974BN Présentation
An ADC converts continuously varying analog signals into numeric values for measurement, control, or signal processing. The AD974BN combines four single-ended analog inputs with a common 16-bit conversion engine, making it useful when several sensors or voltage signals must be sampled by a compact system. Its serial interface reduces the number of parallel data lines needed on the PCB and supports communication with a digital controller.
The converter provides 16-bit nominal resolution and 200 kSPS throughput. These figures define the balance between measurement detail and acquisition speed: the device samples up to 200,000 times per second while representing each selected channel with 16-bit digital data. The integrated reference is +2.5 V, and the system operates from a single +5 V supply. A power-down mode is also included for applications that need to reduce consumption when conversion is not required.
The AD974 architecture uses a four-channel input multiplexer and a successive-approximation switched-capacitor conversion process. The input multiplexer selects one of four single-ended analog channels for conversion, while the serial interface transfers conversion results. The integrated 2.5 V reference provides a defined internal reference option, and the datasheet states that the device supports either external or internal reference selection.
Typical applications include industrial process monitoring, sensor signal acquisition, laboratory instrumentation, communications equipment, and embedded measurement systems. The four-channel structure is useful when monitoring multiple voltages sequentially, while the 200 kSPS rate supports measurements where moderate-to-high sampling throughput is needed without requiring a parallel ADC output interface.
When designing around the AD974BN, preserve adequate analog and digital return paths, place input-conditioning components close to the relevant pins, and account for the selected input range when defining signal scaling. The serial interface timing and power-down behavior should be checked against the controller requirements in the Analog Devices AD974 datasheet.
Alternatives de remplacement direct pour AD974BN — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
AD974BNZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD974ANZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD974
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD974BNZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AD974BN Valeurs maximales et caractéristiques électriques
| Product Type | Four-channel data acquisition system with ADC |
| Résolution | 16 bit |
| Sampling Throughput | 200 kSPS |
| Analog Input Channels | 4 single-ended channels |
| Input Ranges | 0 V to +4 V, 0 V to +5 V, or ±10 V |
| Tension d'alimentation | +5 V single supply |
| Internal Reference | +2.5 V |
| Reference Selection | External or internal 2.5 V reference |
| Converter Architecture | Successive-approximation switched-capacitor ADC |
| Input Multiplexer | Four-channel analog input multiplexer |
| Interface | High-speed serial interface |
| Power-Down Mode | Yes |
| Maximum Power Dissipation | 120 mW |
| Boîtier | 28-pin PDIP |
| Type de montage | Through-hole |
Guide de configuration des broches du AD974BN 28-pin pdip
Configuration des broches du AD974BN (boîtier 28-pin pdip). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour AD974BN.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AD974BN convient pour 6 applications: Industrial Process Monitoring, Sensor Signal Acquisition, Laboratory Instrumentation, Communications Test Equipment, Embedded Data Acquisition, Power and Supply Monitoring.
Industrial Process Monitoring
The AD974BN fits industrial process monitoring because it combines four single-ended analog inputs with a 16-bit, 200 kSPS conversion engine. A controller can select each sensor or process-voltage channel through the multiplexer and acquire sequential measurements through the serial interface. The supported 0 V to +4 V, 0 V to +5 V, and ±10 V ranges allow the same converter family to serve different front-end signal levels. Designers should scale each sensor output into the selected range, provide protection for transient industrial faults, and verify timing against the control system.
Recommandé
Sensor Signal Acquisition
AD974BN is suitable for acquiring several low-bandwidth sensor outputs in a centralized measurement system. Its four single-ended inputs reduce the number of separate converter packages when pressure, temperature, level, or position signals must be observed in sequence. The 16-bit resolution provides the nominal measurement format, while 200 kSPS throughput supports sampling faster than many slowly changing sensor networks require. A practical design should use buffering, anti-alias filtering, and channel-specific scaling, then verify conversion timing and acquisition latency with the host controller.
Recommandé
Laboratory Instrumentation
The AD974BN can serve laboratory instrumentation that needs repeatable acquisition of four analog measurement points. A 16-bit ADC format and 200 kSPS maximum throughput allow the instrument to balance numeric resolution with sampling flexibility. The internal +2.5 V reference provides a defined source, while the datasheet also supports external-reference selection for systems that need tighter control of the measurement reference. Calibration should account for analog front-end offset, gain, input-range selection, and the difference between the internal reference and any external reference used in production.
Recommandé
Communications Test Equipment
AD974BN is appropriate for test systems that monitor several analog control or supply-related signals around communications hardware. The serial interface helps reduce PCB signal count when the converter communicates with a digital controller, and the four-channel multiplexer supports repeated measurements without requiring four separate converter packages. The 200 kSPS throughput can provide adequate margin for many supervisory and diagnostic measurements, although it is not a substitute for waveform capture with much higher bandwidth requirements. Input conditioning should preserve signal integrity and prevent out-of-range transients from reaching the converter.
Recommandé
Embedded Data Acquisition
The AD974BN works well in embedded acquisition systems requiring several analog measurements and a compact serial connection. Its single +5 V supply simplifies system power planning, while the internal 2.5 V reference and selectable reference source provide flexibility in embedded designs. The 16-bit conversion format can be useful when the system must preserve measurement detail from sensors or potentiometric positions. Firmware should handle channel selection, conversion status, reference configuration, and power-down sequencing according to the interface timing defined by the manufacturer.
Recommandé
Power and Supply Monitoring
AD974BN can monitor several voltage-related points in a power subsystem when those signals are conditioned into one of its supported input ranges. Four single-ended channels allow sequential measurement of rails, dividers, or control signals, while 200 kSPS throughput supports relatively rapid supervisory updates. The converter is not a replacement for a dedicated high-resolution power monitor when accuracy, isolation, or fault-response requirements exceed the AD974BN application envelope. Add resistor-divider attenuation, input filtering, and protection before connecting power rails.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AD974BN — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AD974BNZ | AD974ANZ | AD974ARZ | AD974 |
|---|---|---|---|---|---|
| Package | 28-pin PDIP | 28-pin PDIP | 28-pin PDIP | SOIC-28 | 28-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
Principaux différenciateurs
- Four-channel acquisition with a serial interface (vs AD974ARZ)
- Single +5 V operating supply (vs AD974ANZ)
- Internal +2.5 V reference with external-reference option (vs AD974ARZ)
Notes de conception
Route analog input traces away from digital serial-interface and switching-supply traces. Place input-conditioning components close to the AD974BN pins, and use a continuous ground reference where possible. Because the converter includes a high-speed serial interface, keep clock and data routing short and controlled; otherwise, edge-related crosstalk can reduce the effective margin of the 16-bit conversion system.
Do not treat the four-channel capability as four simultaneous 16-bit converters. The verified architecture uses a four-channel input multiplexer feeding one sampling ADC, so channels are selected sequentially. Firmware and hardware timing must account for channel selection, conversion status, and serial transfer. Also confirm the selected 0 V to +4 V, 0 V to +5 V, or ±10 V input range before applying external signals.
Use a single +5 V supply as specified for the AD974BN and follow the manufacturer’s decoupling recommendations. The verified datasheet information lists maximum power dissipation as 120 mW, but actual board temperature depends on operating activity, package, copper area, and ambient temperature. If the power-down mode is used, verify that the host controller does not assume the converter remains active during a conversion sequence.
Informations de conformité
The verified web data does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements for AD974BN.