AD977ANZ - 16-Bit 100 kSPS SAR ADC | Analog Devices
MPN: AD977ANZ ✓ NakahandaAD977ANZ Ulas
An ADC is a data-conversion integrated circuit that transforms a continuously varying analog voltage into a digital value. The AD977 belongs to the SAR ADC hierarchy, where successive-approximation switched-capacitor circuitry compares the sampled input against an internal reference and resolves each conversion through successive bit decisions. SAR ADCs are commonly used within test and measurement equipment, industrial control systems, instrumentation, and embedded data-acquisition platforms.
The AD977ANZ provides 16-bit resolution at 100 kSPS from one analog input. Its single 5 V operating supply simplifies system-level power planning, while the internal 2.5 V reference supports the converter core. The serial interface reduces the number of package pins needed for data transfer, and the 20-pin PDIP package is suitable for conventional through-hole PCB assembly and prototype development.
Compared with the faster AD977A, the AD977ANZ has a lower maximum throughput of 100 kSPS versus 200 kSPS. This distinction matters when designing multiplexed sensor acquisition, process-control, or digital instrumentation systems: the AD977ANZ can serve lower-rate precision channels, while the AD977A is better aligned with twice-rate acquisition requirements. The AD977 family also supports over-sampling techniques when additional effective resolution is needed, subject to the analog and digital noise limits of the complete measurement chain.
Typical uses include industrial process monitoring, laboratory measurement instruments, data-acquisition modules, digital panel meters, and embedded control systems. Engineers should preserve clean analog grounding, provide suitable reference and bypass decoupling, and route the serial data lines away from high-current switching nodes. Input-source impedance and acquisition time must also be checked against the required sampling rate.
For PCB layouts, use a continuous ground plane and place input, reference, and supply bypass components close to their associated pins. The 20-pin PDIP format simplifies socket-based prototyping, but production designs should minimize long analog traces and protect the input node from electrostatic discharge and switching-node coupling.
This page organizes the AD977ANZ conversion-rate, supply, resolution, packaging, and application characteristics with drop-in family alternatives and practical PCB guidance for faster component selection.
Mga alternatibo na pwedeng ilagay na AD977ANZ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok AD977ANZ (parehas na form factor at footprint) — pagkakaiba sa Package, Supply Voltage, Architecture, Interface, Power-Down Mode.
AD977AN
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →AD977AANZ
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
AD977AAN
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
AD977AZ
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
AD977AAZ
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
AD977ANZ Mga Pinakamataas na Rating at Electrical Characteristics
| Converter Type | Successive-approximation ADC |
| Pangangasiwaan | 16 bit |
| Throughput Rate | 100 kSPS |
| Input Architecture | Single-ended, 1 input |
| Volte ng Pagbibigay | 5 V |
| Internal Reference | 2.5 V |
| Output Interface | Serial |
| ADC Architecture | Switched-capacitor SAR |
| Packhaging | 20-pin PDIP |
| Uri ng Pagpapasok | Through-hole |
| Temperature Grade | Industrial |
| Tindminan RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Gabay sa Pin Configuration ng AD977ANZ 20-pin pdip
Pin configuration para sa AD977ANZ (20-pin pdip package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa AD977ANZ.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
AD977ANZ ay nararapat para sa 6 aplikasyons: Industrial Process Measurement, Laboratory Data Acquisition, Embedded Sensor Interface, Digital Panel Meter, Digital Control and Monitoring, Precision Signal Conditioning.
Industrial Process Measurement
The AD977ANZ fits industrial process-monitoring channels that need 16-bit measurement resolution without the 200 kSPS rate of the AD977A. Its 100 kSPS successive-approvement conversion rate is suitable for pressure, temperature, flow, and level signals after suitable conditioning. The single 5 V supply simplifies analog power distribution, while the internal 2.5 V reference provides a defined conversion basis. A practical design should add input protection, filtering, calibration, and channel isolation as required by the sensed process.
Laboratory Data Acquisition
The AD977ANZ is appropriate for compact laboratory instruments that acquire moderately slow analog waveforms or transducer outputs at 100 kSPS. Its 16-bit SAR architecture supports precision-oriented measurement while its serial interface simplifies connection between the converter and a controller or digital signal processor. Keep the analog input path short, use a continuous ground plane, and place bypass capacitance close to the supply pins. Acquisition bandwidth and source settling must be checked against the converter timing to preserve full-scale accuracy.
Embedded Sensor Interface
The AD977ANZ can serve as the conversion stage for embedded sensor interfaces requiring more precision than an 8-bit or 12-bit converter but only 100 kSPS acquisition speed. It converts one single-ended analog input using a switched-capacitor SAR core and operates from one 5 V rail. The 20-pin PDIP format is convenient for prototype and through-hole assembly. For battery-powered systems, evaluate the complete power budget and analog settling behavior because converter energy per conversion depends on sampling rate and operating conditions.
Digital Panel Meter
A digital panel meter can use the AD977ANZ to digitize a conditioned analog measurement while retaining a manageable 100 kSPS conversion rate. The 16-bit result supports fine display resolution and traceable control or logging functions when the front end, reference, and sensor path are properly designed. Because panel meters often operate from shared industrial supplies, include filtering and surge protection ahead of the converter. Use a stable, low-noise 5 V rail to avoid introducing errors that exceed the useful resolution of the measurement chain.
Digital Control and Monitoring
The AD977ANZ is suitable for digital control and monitoring systems that periodically measure analog feedback values at up to 100 kSPS. Its 16-bit resolution can provide sufficient control resolution when the system includes sensor gain, calibration, and noise control. The switched-capacitor SAR converter and serial output are appropriate for a controller that commands conversion and receives the resulting code. Choose sampling timing and filtering carefully so that control-loop bandwidth, latency, and aliasing requirements are all satisfied.
Precision Signal Conditioning
The AD977ANZ can serve as the final conversion element in a precision analog signal-conditioning chain that includes amplification, filtering, excitation, and gain correction. Its 100 kSPS rate is well suited to many industrial and embedded signals, while 16-bit resolution preserves fine detail after conditioning. Keep high-impedance input paths short and guard against leakage, ground potential differences, and switching-node coupling. The complete measurement uncertainty should be allocated across the sensor, analog front end, reference, converter, and calibration coefficients.
Impormasyon ng Talumpati sa Engineering for AD977ANZ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | AD977AN | AD977AANZ | AD977AAN | AD977AZ | AD977AAZ |
|---|---|---|---|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Throughput Rate | 100 kSPS | 100 kSPS | 200 kSPS | 200 kSPS | 100 kSPS | 200 kSPS |
| Converter Architecture | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
Pangunahing mga Pagkakaiba
- Lower-rate member for precision-oriented acquisition (kumpara saAD977AANZ)
- 16-bit resolution across the compared AD977 family options (kumpara saAD977AANZ)
- Single 5 V supply across the principal family alternatives (kumpara saAD977AANZ)
- Consistent 20-pin PDIP mechanical format (kumpara saAD977AANZ)
Talaan ng Disenyo
Use a continuous ground plane beneath the AD977ANZ and keep the analog input route short and away from digital clocks, relay contacts, and high-current switching paths. Place input and bypass capacitors close to the relevant package pins with short ground returns. A 20-pin PDIP layout should provide adequate spacing around the input and reference pins, while the analog and digital return currents should meet at a deliberate ground point rather than through narrow traces.
Check source settling against the acquisition time required for 100 kSPS operation. High-impedance sensors and long input traces can add enough capacitance to prevent the input from settling accurately before conversion. Reduce source impedance with a suitable buffer, minimize input-node capacitance, and filter close to the converter. Include the settling time of the complete analog front end when calculating the maximum valid input bandwidth.
Decouple the 5 V supply at the converter with short, low-inductance traces and place the bypass capacitor near the supply and ground pins. The switched-capacitor SAR core can draw pulsed current during conversion, so the supply network should not share narrow paths with noisy actuators or switching converters. Validate the 5 V rail under acquisition load and maintain a quiet return path to prevent conversion-code disturbance.
Do not choose the AD977A-family replacement solely because it offers 200 kSPS. The AD977ANZ provides 100 kSPS, while the AD977A options provide twice that rate; different acquisition timing can change input bandwidth, settling margin, and system filtering requirements. Confirm the exact pin names, analog input range, reference behavior, serial timing, supply limits, and temperature grade in the manufacturer datasheet before using an ordering variant as a drop-in replacement.
Impormasyon ng Pagsunod sa Kautusan
The component is an industrial-grade ADC rather than an automotive-qualified AEC-Q100 device. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not confirmed in the manufacturer product-page excerpt.