AD7690BCPZRL7 - 18-Bit 400kSPS PulSAR ADC | Analog Devices
MPN: AD7690BCPZRL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $27.5 | $27.50 |
| 10 | $25.3 | $253.00 |
| 100 | $22 | $2,200.00 |
| 500 | $19.8 | $9,900.00 |
| 1,000 | $17.6 | $17,600.00 |
Drop-in alternatives for AD7690BCPZRL7 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7691BCPZRL7
β Drop-Inπ Reference alternative (not in catalog)
AD7982BCPZ-RL7
β Drop-Inπ Reference alternative (not in catalog)
AD7687BCPZRL7
β Drop-Inπ Reference alternative (not in catalog)
AD7688BCPZRL7
β Drop-Inπ Reference alternative (not in catalog)
AD7693BCPZRL7
β Drop-Inπ Reference alternative (not in catalog)
AD7690BCPZRL7 Maximum Ratings & Electrical Characteristics
| Resolution | 18 bits |
| Sampling Rate | 400 kSPS |
| Number of Inputs | 1 |
| Input Type | Differential |
| Data Interface | SPI, DSP, MICROWIRE, QSPI |
| Architecture | SAR |
| INL (Integral Nonlinearity) | Β±0.75 LSB typ, Β±1.5 LSB max (Β±6 ppm of FSR) |
| Supply Voltage | 4.75 V to 5.25 V |
| Logic Supply Voltage (VIO) | 1.8 V to 5 V |
| Package | 10-LFCSP-WD (3x3 mm) |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Power Dissipation | [DATA_NEEDED: Power dissipation] |
| Reference Voltage | [DATA_NEEDED: Reference voltage range] |
| Daisy-Chain Support | Yes (via SDI) |
| Busy Indicator | Optional |
| RoHS Status | Compliant |
AD7690BCPZRL7 Pin Configuration
| Pin 1 | IN+ β Positive analog input |
| Pin 2 | IN- β Negative analog input |
| Pin 3 | GND β Ground |
| Pin 4 | VDD β Power supply (5V) |
| Pin 5 | VIO β Logic supply (1.8V to 5V) |
| Pin 6 | SDI β Serial data input (daisy-chain) |
| Pin 7 | SDO β Serial data output |
| Pin 8 | SCK β Serial clock input |
| Pin 9 | CNV β Convert input (start conversion) |
| Pin 10 | REF β Reference voltage input |
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
AD7690BCPZRL7 is suitable for 6 applications: Precision Data Acquisition Systems, Medical Instrumentation, Industrial Process Control, Vibration Analysis, Battery-Powered Portable Devices, Audio and Acoustic Measurement.
Precision Data Acquisition Systems
The AD7690BCPZRL7's 18-bit resolution and 400 kSPS sampling rate make it ideal for high-accuracy data acquisition systems. Its differential input rejects common-mode noise, ensuring precise measurement of sensor signals. The SPI interface simplifies connection to microcontrollers, and the small LFCSP package saves board space. With an INL of Β±1.5 LSB max, it delivers excellent linearity for industrial and laboratory equipment.
Recommended
Medical Instrumentation
In medical devices like patient monitors and diagnostic equipment, the AD7690BCPZRL7 provides high-resolution conversion of biosignals. Its low power consumption, which scales with throughput, is critical for battery-operated devices. The 18-bit resolution ensures accurate detection of small physiological signals, while the wide operating temperature range (-40Β°C to +125Β°C) supports reliable operation in clinical environments. The compact LFCSP package enables miniaturized designs.
Recommended
Industrial Process Control
The AD7690BCPZRL7 excels in industrial process control where precision and reliability are paramount. Its differential input and high common-mode rejection make it robust against electrical noise in factory environments. The 400 kSPS throughput allows real-time monitoring of fast-changing process variables. With an operating temperature range of -40Β°C to +125Β°C, it withstands harsh industrial conditions. The SPI interface integrates easily with industrial microcontrollers and PLCs.
Recommended
Vibration Analysis
For vibration monitoring and analysis, the AD7690BCPZRL7 offers the high resolution and speed needed to capture dynamic signals. Its 18-bit resolution provides a wide dynamic range, essential for detecting subtle vibrations. The 400 kSPS sampling rate captures high-frequency components accurately. The differential input reduces interference from electromagnetic sources, ensuring clean data. The small package allows integration into compact sensor nodes for predictive maintenance.
Recommended
Battery-Powered Portable Devices
The AD7690BCPZRL7's power consumption scales linearly with throughput, making it ideal for battery-powered portable devices. At lower sampling rates, power dissipation decreases, extending battery life. The 1.8V to 5V logic interface allows direct connection to low-power microcontrollers. The compact LFCSP package and wide temperature range support portable and wearable designs. Its high resolution ensures accurate measurements in energy-constrained applications.
Recommended
Audio and Acoustic Measurement
In audio and acoustic measurement systems, the AD7690BCPZRL7 provides high-resolution conversion of analog audio signals. Its 18-bit resolution and low noise ensure accurate representation of sound waveforms. The differential input helps reject common-mode noise in audio lines. The 400 kSPS sampling rate is sufficient for high-frequency acoustic analysis. The SPI interface allows easy integration with digital signal processors for real-time audio processing.
Recommended
Recommended Products Summary
Engineering reference data for AD7690BCPZRL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7690BRMZ-RL7 | AD7691BCPZRL7 | AD7982BCPZ-RL7 | AD7687BCPZRL7 |
|---|---|---|---|---|---|
| Package | 10-LFCSP-WD (3x3) | 10-MSOP | 10-LFCSP-WD (3x3) | 10-LFCSP-WD (3x3) | 10-LFCSP-WD (3x3) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 bits | 18 bits | 18 bits | 18 bits | 16 bits |
| Sampling Rate | 400 kSPS | 400 kSPS | 250 kSPS | 1 MSPS | 250 kSPS |
| Input Type | Differential | Differential | Differential | Differential | Differential |
| INL (max) | Β±1.5 LSB | Β±1.5 LSB | Β±1.5 LSB | Β±1.5 LSB | Β±1.5 LSB |
| Supply Voltage | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V | 4.75V to 5.25V |
| Daisy-Chain Support | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- 18-bit resolution with no missing codes (vs AD7687BCPZRL7 (16-bit))
- 400 kSPS sampling rate (vs AD7691BCPZRL7 (250 kSPS))
- Compact LFCSP package (vs AD7690BRMZ-RL7 (MSOP))
Design Notes
The AD7690BCPZRL7 requires a clean 5V analog supply (VDD) and a separate logic supply (VIO) for the digital interface. Use low-dropout regulators with low output noise to power VDD, and decouple with 10uF and 0.1uF capacitors close to the pins. The VIO supply can be 1.8V, 2.5V, 3V, or 5V, matching the host microcontroller's logic level.
For optimal performance, place the AD7690BCPZRL7 close to the signal source and keep analog input traces short and shielded. Use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Decouple the REF pin with a low-impedance capacitor, such as 10uF, to maintain reference stability. Avoid routing digital signals near the analog inputs to prevent coupling.
A common mistake is driving the REF pin with a high-impedance source, which can degrade accuracy. Use a low-impedance reference buffer or a precision reference like the ADR4525. Also, ensure the input signals are within the specified common-mode range to avoid saturation. Finally, do not exceed the absolute maximum ratings on VDD or VIO, as this can damage the device.
Compliance Information
RoHS compliance is indicated by the 'RL7' suffix (lead-free). Other compliance details not specified in the provided data.
