AD7949BCPZRL7 - 14-Bit 8-Ch 250kSPS SAR ADC | Analog Devices
MPN: AD7949BCPZRL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.44 | $8.44 |
| 10 | $7.82 | $78.20 |
| 100 | $6.95 | $695.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.63 | $5,630.00 |
Drop-in alternatives for AD7949BCPZRL7 — 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:
AD7949BCPZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7949SCPZ-EP-RL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7949BCPZRL7
✅ Drop-In✓ In Stock
$5.63 / Unit
View Datasheet →AD7949BCPZRL7 Maximum Ratings & Electrical Characteristics
| Resolution | 14 bit |
| Number of Channels | 8 |
| Sampling Rate | 250 kSPS |
| Input Type | Single-Ended, Differential, Pseudo-Differential |
| Interface | SPI |
| Architecture | SAR |
| Supply Voltage | 2.3 V to 5.5 V |
| Reference Voltage | 2.3 V to 5.5 V |
| INL (Integral Nonlinearity) | ±1 LSB (typical) |
| DNL (Differential Nonlinearity) | ±0.5 LSB (typical) |
| Power Dissipation | 4.5 mW (typical at 5 V, 250 kSPS) |
| Operating Temperature Range | -40°C to +125°C |
| Package | 20-Lead LFCSP (4x4 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AD7949BCPZRL7 Pin Configuration
| Pin 1 | IN0 — Analog input channel 0 |
| Pin 2 | IN1 — Analog input channel 1 |
| Pin 3 | IN2 — Analog input channel 2 |
| Pin 4 | IN3 — Analog input channel 3 |
| Pin 5 | IN4 — Analog input channel 4 |
| Pin 6 | IN5 — Analog input channel 5 |
| Pin 7 | IN6 — Analog input channel 6 |
| Pin 8 | IN7 — Analog input channel 7 |
| Pin 9 | GND — Ground |
| Pin 10 | REF — Reference voltage input |
| Pin 11 | REFIN — Reference buffer input |
| Pin 12 | VDD — Power supply |
| Pin 13 | SCLK — Serial clock input |
| Pin 14 | SDI — Serial data input |
| Pin 15 | SDO — Serial data output |
| Pin 16 | CNV — Convert input |
| Pin 17 | BUSY — Busy indicator output |
| Pin 18 | COM — Common input for pseudo-differential mode |
| Pin 19 | GND — Ground |
| Pin 20 | EP — Exposed pad (thermal and 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
AD7949BCPZRL7 is suitable for 6 applications: Multichannel Data Acquisition, Industrial Process Control, Medical Instrumentation, Battery-Powered Devices, Portable Instrumentation, Test and Measurement.
Multichannel Data Acquisition
The AD7949BCPZRL7's 8-channel multiplexer and 250 kSPS throughput make it ideal for multichannel data acquisition systems. It can sample multiple sensors sequentially with 14-bit resolution, ensuring accurate monitoring of temperature, pressure, and strain gauges. The SPI interface simplifies connection to microcontrollers, and the low power consumption (4.5 mW) is suitable for portable DAQ devices. The device's input flexibility (single-ended, differential) allows direct connection to various sensor outputs without external conditioning.
Recommended
Industrial Process Control
In industrial process control, the AD7949BCPZRL7 monitors multiple analog signals such as temperature, pressure, and flow. Its 14-bit resolution and ±1 LSB INL ensure accurate conversion for closed-loop control. The device operates from 2.3 V to 5.5 V, compatible with common industrial supply rails. The 250 kSPS sampling rate allows real-time monitoring of fast-changing processes. The LFCSP package's small footprint (4x4 mm) saves board space in compact control modules. The SPI interface enables easy integration with industrial microcontrollers and PLCs.
Recommended
Medical Instrumentation
The AD7949BCPZRL7 is well-suited for medical instrumentation such as patient monitors and diagnostic equipment. Its low power consumption (4.5 mW) is critical for battery-powered portable devices. The 8-channel input allows monitoring multiple physiological signals (ECG, EEG, temperature) simultaneously. The 14-bit resolution provides sufficient precision for medical measurements. The device's small LFCSP package enables compact device design. The SPI interface allows direct connection to medical-grade microcontrollers. The wide operating temperature range (-40°C to +125°C) ensures reliability in clinical environments.
Recommended
Battery-Powered Devices
The AD7949BCPZRL7 is ideal for battery-powered devices due to its low power consumption of 4.5 mW at 5 V and 250 kSPS, and a power-down mode that reduces current to 1 µA. The 2.3 V minimum supply voltage allows operation from a single lithium-ion cell. The 8-channel multiplexer enables monitoring of multiple battery cells or system parameters with one ADC. The small LFCSP package (4x4 mm) is suitable for space-constrained portable designs. The SPI interface is compatible with low-power microcontrollers. The device's wide operating temperature range supports outdoor and industrial battery applications.
Recommended
Portable Instrumentation
The AD7949BCPZRL7 is well-suited for portable instrumentation such as handheld multimeters and data loggers. Its low power consumption (4.5 mW) extends battery life, and the 8-channel input allows measuring multiple parameters (voltage, current, resistance) with a single ADC. The 14-bit resolution provides high accuracy for measurement instruments. The device's small LFCSP package enables compact handheld designs. The SPI interface allows easy connection to portable microcontrollers. The wide operating temperature range (-40°C to +125°C) ensures reliable operation in field environments. The power-down mode further reduces power when idle.
Recommended
Test and Measurement
The AD7949BCPZRL7 is used in test and measurement equipment such as data acquisition boards and spectrum analyzers. Its 250 kSPS sampling rate and 14-bit resolution enable accurate digitization of analog signals. The 8-channel multiplexer allows simultaneous monitoring of multiple test points. The device's low power consumption (4.5 mW) is beneficial for multi-channel systems. The SPI interface supports high-speed data transfer to FPGAs or DSPs. The small LFCSP package saves board space in dense test equipment. The wide operating temperature range ensures stable performance in lab and field environments.
Recommended
Recommended Products Summary
Engineering reference data for AD7949BCPZRL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7949BCPZ | AD7949SCPZ-EP-RL7 | ADS8344 |
|---|---|---|---|---|
| Package | 20-Lead LFCSP (4x4 mm) | 20-Lead LFCSP (4x4 mm) - same | 20-Lead LFCSP (4x4 mm) - same | 20-Lead SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 14 bit | 14 bit | 14 bit | 16 bit |
| Sampling Rate | 250 kSPS | 250 kSPS | 250 kSPS | 100 kSPS |
| Number of Channels | 8 | 8 | 8 | 8 |
| Supply Voltage | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.3 V to 5.5 V | 2.7 V to 5.25 V |
| Interface | SPI | SPI | SPI | SPI |
| Power Dissipation | 4.5 mW (typical) | 4.5 mW (typical) | 4.5 mW (typical) | 10 mW (typical) |
Key Differentiators
- 8-channel multiplexer with flexible input configurations (vs ADS8344)
- Higher sampling rate at 250 kSPS (vs ADS8344)
- Lower power consumption (vs ADS8344)
Design Notes
Decouple the VDD pin with a 10 µF and 0.1 µF capacitor placed as close to the pin as possible. The REF pin should have a 10 nF capacitor to ground to filter reference noise. For optimal performance, use a low-noise LDO like the TPS7A4700 to supply VDD, as switching regulators can introduce noise that degrades ADC accuracy.
Keep analog input traces short and shielded from digital signals. Use a solid ground plane under the ADC and connect the exposed pad (EP) to ground with multiple vias for thermal and electrical performance. Separate analog and digital ground planes if possible, but connect them at a single point near the ADC.
Ensure the reference voltage is stable and within the specified range (2.3 V to 5.5 V). Avoid driving the analog inputs with high-impedance sources; use a buffer amplifier if necessary. The SCLK frequency should not exceed 50 MHz, and the CNV pulse must meet the minimum acquisition time of 290 ns.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider AD7949SCPZ-EP-RL7 which has enhanced product qualification.
