Analog Devices Inc. AD7705BRU-REEL
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Mfr | Analog Devices Inc. |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Input Type | Differential |
| Configuration | MUX-PGA-ADC |
| Supplier Device Package | 16-TSSOP |
| Number of Inputs | 2 |
| Number of Bits | 16 |
| Number of A/D Converters | 1 |
| Architecture | Sigma-Delta |
| Reference Type | External |
| Data Interface | SPI, DSP |
| Sampling Rate (Per Second) | 500 |
| Voltage - Supply, Analog | 2.7V ~ 3.3V, 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.3V, 5V |
| Ratio - S/H:ADC | - |
| Features | PGA |
| Package | Tape & Reel (TR) |
| Product Status | Obsolete |
| Base Product Number | AD7705 |
| Standard Package | 2,500 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
AD7705BRU-REEL sigma-delta analog-to-digital converter
The AD7705BRU-REEL from Analog Devices is a high-resolution, low-power sigma-delta analog-to-digital converter (ADC) designed for precision measurement applications requiring 16-bit no-missing-code performance. This advanced ADC features two fully differential input channels with programmable gain amplifiers (PGA) supporting gains from 1 to 128, enabling direct interface with low-level signals from sensors and transducers. Housed in a compact 16-pin TSSOP package, the device operates from a single 2.7V to 3.3V or 4.75V to 5.25V supply and consumes only 1 mW typical power, making it ideal for portable instrumentation, industrial process control, and sensor interface applications where high accuracy and low power consumption are critical. The AD7705BRU-REEL incorporates a proprietary sigma-delta conversion technique with on-chip digital filtering, providing an effective resolution of 15 bits at 500 Hz output data rate and 16 bits at lower update rates, while its flexible serial interface allows easy connection to microcontrollers and DSPs.
AD7705BRU-REEL ADC Applications
The AD7705BRU-REEL is extensively used in industrial process control systems for pressure, temperature, and flow measurement applications where its high resolution and programmable gain enable direct interface with bridge sensors and thermocouples. Portable medical devices utilize the ADC for patient monitoring equipment, portable diagnostics, and wearable sensors benefiting from its low power consumption and high integration level. Weigh scale and strain gauge applications employ the device for precision measurement systems requiring high resolution and excellent noise rejection capabilities. Additional applications include chromatography equipment, gas analysis instruments, and environmental monitoring systems that demand accurate signal acquisition from low-level sensor outputs. The ADC's combination of resolution, integration, and flexibility makes it particularly valuable for applications requiring precise measurement of small signals in noisy environments.
Alternative Analog Converter Recommendations
● ADS1248IPW (Texas Instruments): A 24-bit delta-sigma ADC with 8 channels, PGA gains up to 128, and higher resolution for precision sensor applications.
● LTC2440CUHF (Analog Devices): A 24-bit high-speed delta-sigma ADC with 7 Hz to 880 Hz output rates and superior noise performance.
● MAX11270 (Maxim Integrated): A 24-bit sigma-delta ADC with 120 dB dynamic range and ultra-low power consumption for portable applications.
● MCP3551-50E/MS (Microchip): A 22-bit delta-sigma ADC with 5 Hz output rate and simple 3-wire interface for cost-sensitive applications.
