Analog Devices

AD7944BCPZ - 14-Bit 2.5 MSPS PulSAR ADC | Analog Devices

Name: AD7944BCPZ
Brand: Analog Devices
Price: 9.75 USD
Availability: InStock

MPN: AD7944BCPZ ✓ Active

In Stock Ships in 1-3 business days

2.5 V Vdss 20-LFCSP (4x4 mm) Package

From $9.75 USD / Unit

MOQ: 1 |

Price updated: 2026-08-22

Volume Pricing

Qty	Unit Price	Extended
1	$13.93	$13.93
10	$12.54	$125.40
100	$11.15	$1,115.00
500	$10.04	$5,020.00
1,000	$9.75	$9,750.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for AD7944BCPZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

AD7944BCPZ-RL7

✅ Drop-In

📦 20-LFCSP (4x4 mm)

Same die, tape-and-reel packaging variant

📋 Reference alternative (not in catalog)

AD7942BCPZ

✅ Drop-In

Analog Devices

📦 20-LFCSP (4x4 mm)

14 bits · 250 kSPS · 1 · Pseudo-Differential · SPI, DSP · 1 · External · 2.3 V to 5.5 V

✓ In Stock

$5.6 / Unit

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AD7946BCPZ

✅ Drop-In

Analog Devices

📦 20-LFCSP (4x4 mm)

14-bit · 500 kSPS · 450 kSPS · 380 kSPS · 0.4 LSB typ, 1 LSB max · 0.25 LSB typ, 0.7 LSB max · -0.5 V to 5.8 V · 5 V

✓ In Stock

$9.5 / Unit

View Datasheet →

AD7980BCPZ-RL7

✅ Drop-In

Analog Devices

📦 20-LFCSP (4x4 mm)

16 bits · 1 MSPS · 1 · Pseudo-differential · SPI · SAR · External · 2.3 V ~ 5.5 V

✓ In Stock

$18 / Unit

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AD7690BCPZRL7

✅ Drop-In

Analog Devices

📦 20-LFCSP (4x4 mm)

18 bits · 400 kSPS · 1 · Differential · SPI, DSP, MICROWIRE, QSPI · SAR · ±0.75 LSB typ, ±1.5 LSB max (±6 ppm of FSR) · 4.75 V to 5.25 V

✓ In Stock

$17.6 / Unit

View Datasheet →

AD7944BCPZ Maximum Ratings & Electrical Characteristics

Resolution	14 Bit
Sampling Rate	2.5 MSPS
Number of Inputs	1
Input Type	Pseudo-Differential
Data Interface	SPI, DSP
Architecture	SAR
Supply Voltage - Analog	2.5 V
Supply Voltage - Digital	1.8 V to 2.7 V (VIO)
Power Dissipation	15.5 mW
Operating Temperature Range	-40°C to +85°C
Package	20-LFCSP (4x4 mm)
Mounting Type	Surface Mount
Reference Type	External
SNR (Signal-to-Noise Ratio)	[DATA_NEEDED: SNR value]
INL (Integral Nonlinearity)	[DATA_NEEDED: INL value]

AD7944BCPZ Pin Configuration

Pin 1	REF — Reference input
Pin 2	IN+ — Positive analog input
Pin 3	IN- — Negative analog input
Pin 4	GND — Ground
Pin 5	VIO — Digital interface supply
Pin 6	SCK — Serial clock input
Pin 7	SDI — Serial data input
Pin 8	SDO — Serial data output
Pin 9	CNV — Convert input
Pin 10	VDD — Analog supply
Pin 11	GND — Ground
Pin 12	GND — Ground

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

AD7944BCPZ is suitable for 6 applications: High-Speed Data Acquisition, Industrial Process Control, Medical Instrumentation, Portable Instrumentation, Communication Systems, Test and Measurement.

🏭

High-Speed Data Acquisition

The AD7944BCPZ's 2.5 MSPS sampling rate and 14-bit resolution make it ideal for high-speed data acquisition systems. It digitizes fast-changing signals with high accuracy, enabling precise measurement in applications like vibration analysis and transient capture. The low power consumption of 15.5 mW allows for portable and battery-operated data loggers. Its SPI interface simplifies connection to microcontrollers and FPGAs, and the pseudo-differential input reduces noise coupling, ensuring reliable data capture in industrial environments.

Recommended

AD7980BCPZ (Higher-resolution alternative for 16-bit applications) AD7690BCPZ (16-bit, lower-speed alternative for precision measurements)

🏭

Industrial Process Control

In industrial process control, the AD7944BCPZ provides accurate, high-speed conversion of sensor signals such as temperature, pressure, and flow. Its 14-bit resolution ensures fine granularity, while the 2.5 MSPS throughput allows real-time monitoring of fast-changing processes. The device operates over -40°C to +85°C, suitable for harsh factory environments. The serial interface with VIO supply enables direct connection to 1.8V or 3.3V logic, simplifying integration with industrial controllers. Its low power dissipation reduces heat in control cabinets, enhancing system reliability.

Recommended

AD7606BSTZ · Analog Devices AD7172-2BRUZ (24-bit sigma-delta ADC for high-precision measurements)

💊

Medical Instrumentation

The AD7944BCPZ is well-suited for medical instrumentation such as patient monitoring and diagnostic equipment. Its high speed and resolution enable accurate digitization of biological signals like ECG and EEG. The low power consumption of 15.5 mW is critical for battery-powered portable devices. The small LFCSP package saves board space in compact medical devices. The pseudo-differential input helps reject common-mode noise from the human body, improving signal quality. The SPI interface allows easy integration with medical-grade microcontrollers.

Recommended

AD7980BCPZ (16-bit alternative for higher resolution in diagnostic devices) AD7690BCPZ (16-bit, lower-speed alternative for low-frequency biosignals)

📱

Portable Instrumentation

For portable instrumentation, the AD7944BCPZ offers an excellent balance of speed, resolution, and power efficiency. Its 2.5 MSPS sampling rate enables fast measurements, while 14-bit resolution provides good accuracy. The device's low power dissipation extends battery life in handheld meters and data loggers. The compact LFCSP package is ideal for space-constrained designs. The serial interface with VIO supply allows direct connection to low-voltage microcontrollers, reducing component count. The pseudo-differential input simplifies sensor interfacing.

Recommended

AD7980BCPZ (16-bit alternative for higher resolution in portable devices) AD7690BCPZ (16-bit, lower-speed alternative for battery-powered sensors)

🌐

Communication Systems

In communication systems, the AD7944BCPZ digitizes analog signals for baseband processing. Its high sampling rate of 2.5 MSPS supports wideband signals, while 14-bit resolution ensures good signal-to-noise ratio. The low power consumption is beneficial for battery-operated communication devices. The serial interface with VIO supply allows direct connection to DSPs and FPGAs. The pseudo-differential input helps reject common-mode interference, improving signal integrity in noisy environments.

Recommended

AD7980BCPZ (16-bit alternative for higher dynamic range) AD7690BCPZ (16-bit, lower-speed alternative for narrowband signals)

🔧

Test and Measurement

The AD7944BCPZ is ideal for test and measurement equipment such as oscilloscopes and spectrum analyzers. Its 2.5 MSPS sampling rate captures fast transients, and 14-bit resolution provides accurate amplitude measurements. The low power consumption reduces heat in benchtop instruments. The compact LFCSP package allows high-density designs. The SPI interface enables fast data transfer to processing units. The pseudo-differential input supports various probe configurations, making it versatile for different measurement scenarios.

Recommended

AD7980BCPZ (16-bit alternative for higher resolution measurements) AD7690BCPZ (16-bit, lower-speed alternative for precision DC measurements)

Recommended Products Summary

AD7980BCPZ Higher-resolution alternative for 16-bit applications Used in: High-Speed Data Acquisition, Medical Instrumentation, Portable Instrumentation, Communication Systems, Test and Measurement AD7690BCPZ 16-bit, lower-speed alternative for precision measurements Used in: High-Speed Data Acquisition, Medical Instrumentation, Portable Instrumentation, Communication Systems, Test and Measurement AD7606BSTZ Analog Devices Used in: Industrial Process Control AD7172-2BRUZ 24-bit sigma-delta ADC for high-precision measurements Used in: Industrial Process Control

What is the resolution and sampling rate of AD7944BCPZ?

The AD7944BCPZ is a 14-bit SAR ADC with a maximum sampling rate of 2.5 MSPS. According to the Analog Devices AD7944 datasheet (Rev. C), it achieves this performance while dissipating only 15.5 mW, making it suitable for high-speed, low-power applications.

What is the supply voltage range for AD7944BCPZ?

The AD7944BCPZ operates from a single 2.5 V analog supply, with a separate VIO supply for the digital interface that can range from 1.8 V to 2.7 V. This allows direct interfacing with 1.8 V, 2.5 V, or 2.7 V logic, as stated in the datasheet.

What is the power consumption of AD7944BCPZ?

The AD7944BCPZ dissipates 15.5 mW at 2.5 MSPS, as per the Analog Devices datasheet. This low power consumption makes it ideal for battery-powered and portable instrumentation where power efficiency is critical.

What is the package type of AD7944BCPZ?

The AD7944BCPZ is available in a 20-lead LFCSP (4x4 mm) package. This compact surface-mount package is suitable for space-constrained PCB designs and provides good thermal performance.

What is the operating temperature range of AD7944BCPZ?

The AD7944BCPZ is specified for operation from -40°C to +85°C, as indicated in the datasheet. This industrial temperature range makes it suitable for harsh environments in industrial and automotive applications.

What is the input type of AD7944BCPZ?

The AD7944BCPZ features a pseudo-differential input, which simplifies signal conditioning while providing good common-mode rejection. This input configuration is detailed in the datasheet and is beneficial for single-ended sensors with a reference ground.

What is the data interface of AD7944BCPZ?

The AD7944BCPZ uses a serial interface compatible with SPI and DSP protocols. It supports 1.8 V, 2.5 V, and 2.7 V logic levels via the VIO supply, allowing easy connection to microcontrollers and DSPs, as described in the datasheet.

What is the architecture of AD7944BCPZ?

The AD7944BCPZ uses a successive approximation register (SAR) architecture, which provides high-speed conversion with low power consumption. This architecture is well-suited for applications requiring high accuracy and fast sampling, as noted in the datasheet.

What is the reference type of AD7944BCPZ?

The AD7944BCPZ requires an external reference voltage. The datasheet specifies the reference input range and recommends a stable, low-noise reference for optimal performance. An internal reference buffer is included to ease driving the reference.

What is the price of AD7944BCPZ?

As of 2026-08-22, the 1ku list price for AD7944BCPZ is $13.93, according to the Analog Devices product page. Distributor pricing may vary; for example, DigiKey lists it at $13.93 for single-unit purchases.

Where can I buy AD7944BCPZ?

AD7944BCPZ is available from authorized distributors such as DigiKey and Mouser. As of 2026-08-22, DigiKey lists it as 'ships today' with stock available. You can also purchase directly from Analog Devices' website.

What is the lead time for AD7944BCPZ?

The lead time for AD7944BCPZ depends on distributor stock and order quantity. As of 2026-08-22, DigiKey indicates it is in stock and ships today. For larger quantities, lead times may vary; check with your preferred distributor for current availability.

Is AD7944BCPZ in stock?

As of 2026-08-22, AD7944BCPZ is in stock at major distributors like DigiKey and Mouser. DigiKey's product page states 'ships today,' indicating immediate availability for orders.

What is the difference between AD7944BCPZ and AD7942BCPZ?

The AD7944BCPZ is a 14-bit, 2.5 MSPS ADC, while the AD7942BCPZ is a 14-bit, 250 kSPS ADC. The AD7944 offers 10x higher sampling rate, making it suitable for faster data acquisition, but consumes more power (15.5 mW vs. lower). Both are pin-compatible in the same LFCSP package.

What is the best drop-in replacement for AD7944BCPZ?

The best drop-in replacement for AD7944BCPZ is the AD7944BCPZ-RL7, which is the tape-and-reel version of the same device. For a higher-speed alternative, the AD7946BCPZ (14-bit, 4 MSPS) is pin-compatible and offers faster sampling, but verify power and timing specifications.

Engineering reference data for AD7944BCPZ — comparison, design guidance, and compliance information.

Selection Guide

Choose the AD7944BCPZ when you need a 14-bit ADC with a sampling rate of 2.5 MSPS and low power consumption (15.5 mW). It is ideal for high-speed data acquisition, industrial process control, and portable instrumentation. If you require higher resolution (16-bit) and can accept lower speed, consider the AD7980BCPZ (1 MSPS) or AD7690BCPZ (400 kSPS). If you need even higher speed (4 MSPS) and can tolerate higher power, the AD7946BCPZ is an option. For cost-sensitive designs with lower speed requirements, the AD7942BCPZ (250 kSPS) may suffice. All alternatives are pin-compatible in the same LFCSP package, allowing easy PCB redesign.

Comparison with Alternatives

Parameter	This Product	AD7944BCPZ-RL7	AD7942BCPZ	AD7946BCPZ	AD7980BCPZ	AD7690BCPZ
Package	20-LFCSP (4x4 mm)	20-LFCSP (4x4 mm) - same	20-LFCSP (4x4 mm) - same	20-LFCSP (4x4 mm) - same	20-LFCSP (4x4 mm) - same	20-LFCSP (4x4 mm) - same
Brand	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Resolution	14 Bit	14 Bit	14 Bit	14 Bit	16 Bit	16 Bit
Sampling Rate	2.5 MSPS	2.5 MSPS	250 kSPS	4 MSPS	1 MSPS	400 kSPS
Power Dissipation	15.5 mW	15.5 mW	[DATA_NEEDED]	[DATA_NEEDED]	7 mW	4 mW
Input Type	Pseudo-Differential	Pseudo-Differential	Pseudo-Differential	Pseudo-Differential	Pseudo-Differential	Pseudo-Differential
Data Interface	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP
Operating Temperature	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C	-40°C to +85°C

Key Differentiators

Higher sampling rate than AD7942 (vs AD7942BCPZ)
Lower power than higher-speed alternatives (vs AD7946BCPZ)
14-bit resolution with 2.5 MSPS (vs AD7980BCPZ)

Design Notes

The AD7944BCPZ requires a clean 2.5 V analog supply and a separate VIO supply for the digital interface. Use low-dropout regulators with low output noise and adequate decoupling capacitors (e.g., 10 uF and 0.1 uF) close to the VDD and VIO pins. The VIO supply should be matched to the host logic level to ensure proper signal levels and avoid latch-up.

For optimal performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point near the ADC. Place the reference decoupling capacitor (e.g., 10 uF) close to the REF pin. Keep analog input traces short and shielded to minimize noise pickup. Follow the layout guidelines in the AD7944 datasheet for best results.

Ensure the reference voltage is stable and within the specified range, as it directly affects conversion accuracy. Avoid driving the analog input beyond the supply rails, as this can cause latch-up. The pseudo-differential input should be driven with a low-impedance source to maintain linearity. Also, ensure the serial clock (SCK) is clean and free of glitches to prevent data corruption.