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Analog Devices Inc. AD7707BRZ-REEL7
- Part No.:
- AD7707BRZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AD7707BRZ-REEL7.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,787
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Product details
Overview
AD7707BRZ-REEL7 from Analog Devices is a 3-channel, 16-bit sigma-delta ADC optimized for low-frequency precision measurement. It integrates programmable gain (1–128), ±10 V high-level and ±10 mV low-level input channels, on-chip digital filtering, and self/system calibration - enabling direct transducer interfacing without external signal conditioning. It operates from 2.7–3.3 V or 4.75–5.25 V and delivers <1 mW power dissipation at 3 V.
For engineers reviewing the AD7707BRZ-REEL7 datasheet, AD7707BRZ-REEL7 pinout, AD7707BRZ-REEL7 application, or AD7707BRZ-REEL7 equivalent, key selection criteria include its true bipolar ±100 mV capability on low-level inputs, 16-bit no-missing-codes performance, ±0.003% integral nonlinearity, SPI/QSPI/MICROWIRE-compatible 3-wire interface, and dual-supply voltage flexibility (3 V/5 V).
Technical Context
The AD7707BRZ-REEL7 employs a charge-balancing sigma-delta architecture with an on-chip analog modulator and digitally programmable FIR filter whose first notch sets output update rate and noise rejection (e.g., 98 dB normal-mode 50/60 Hz rejection). Its analog front end includes a programmable gain amplifier (PGA) and selectable unipolar/bipolar input modes per channel.
It supports three distinct analog input paths: two pseudo-differential low-level channels (AIN1/AIN2) with ±100 mV true bipolar range and 130 dB CMR at gain ≥8, plus one high-level channel (AIN3) referenced to HICOM with ±10 V range and 27 kΩ input impedance. Calibration registers enable zero- and full-scale correction per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16 bits, no missing codes - guarantees monotonicity and full code coverage in all operating modes. |
| INL | ±0.003% of FSR - enables high-accuracy DC measurements such as RTD or pressure bridge outputs. |
| Input Ranges | Low-level: ±10 mV to ±2.5 V (bipolar), 0–20 mV to 0–2.5 V (unipolar); High-level: ±10 V, ±5 V, 0–10 V - eliminates need for external attenuators or level shifters. |
| Power Dissipation | 1.05 mW max at 3 V - suitable for battery-powered data loggers and portable instrumentation. |
| Interface | 3-wire SPI/QSPI/MICROWIRE/DSP-compatible serial - simplifies microcontroller integration with minimal GPIO usage. |
| Calibration | On-chip self-calibration and system calibration - removes offset/gain errors without external equipment or firmware compensation. |
| Supply Range | AVDD: 2.7–3.3 V or 4.75–5.25 V; DVDD: 2.7–5.25 V - supports mixed-voltage system designs and legacy 5 V controllers. |
Pinout & Package
AD7707BRZ-REEL7 is housed in a 20-lead SOIC (wide-body, 0.3 inch) package compliant with JEDEC MS-013AC. Pin functions are validated per Analog Devices AD7707 Rev. B datasheet (Pages 10–11).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN1, AIN2 | Low-level pseudo-differential analog inputs | Accept transducer outputs directly; support true bipolar ±100 mV with LCOM reference. |
| AIN3 | High-level single-ended analog input | Handles ±10 V signals referenced to HICOM; internal 30 kΩ resistor network enables direct connection. |
| REF IN(+), REF IN(−) | Differential reference input | Defines full-scale range; accepts 1.225 V (3 V supply) or 2.5 V (5 V supply) references. |
| LOCOM, HICOM | Common-mode reference terminals | LOCOM sets common-mode for AIN1/AIN2; HICOM sets reference for AIN3. |
| DIN, DOUT, SCLK, CS | 3-wire serial interface | Full-duplex SPI-compatible communication; Schmitt-triggered SCLK ensures noise immunity. |
| DRDY | Data ready indicator | Active-low open-drain output signals valid conversion result; synchronizes host read timing. |
| RESET | Hardware reset input | Asynchronous active-low signal that clears registers and initiates power-on reset sequence. |
| MCLK IN/OUT | Master clock interface | Accepts external crystal or clock source (400 kHz–5 MHz); MCLK OUT provides buffered clock output. |
| AVDD, DVDD | Analog/digital power supplies | Separate supplies allow noise isolation; AVDD supports 2.7–3.3 V or 4.75–5.25 V operation. |
| AGND, DGND | Analog/digital ground | Independent ground pins minimize digital switching noise coupling into analog path. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable gain front end (1–128) | Enables single ADC to handle µV-level strain gage outputs and 10 V industrial sensor signals without external amplifiers. |
| True bipolar ±100 mV on low-level inputs | Supports direct connection of Wheatstone bridges with center-tap biasing, eliminating external level-shifting circuitry. |
| On-chip digital filter with programmable notch | Configurable first-notch frequency (e.g., 10/25/50/60 Hz) delivers >98 dB line-frequency rejection without external analog filters. |
| Self- and system-calibration capability | Removes gain/offset drift over temperature and eliminates board-level calibration steps during production test. |
| Buffered/unbuffered analog input mode | BUF bit enables internal buffer for high-impedance sources (e.g., thermocouples), or bypasses it for lowest noise with low-Z sensors. |
Applications
| Pressure Measurement | RTD Temperature Sensing |
|---|---|
|
Use Scenario: Measuring differential pressure across a flow orifice plate using a 350 Ω Wheatstone bridge with ±15 mV full-scale output. IC Role / Device Role / Timing Role: ADC front end performing ratiometric conversion with internal 2.5 V reference; handles bipolar bridge output directly on AIN1/AIN2 with LCOM grounding. Use Value: Eliminates external instrumentation amplifier and precision op-amp stages, reducing BOM count and thermal drift error sources. |
Use Scenario: Monitoring industrial process temperature via 4-wire Pt100 RTD in a 2 mA constant-current configuration. IC Role / Device Role / Timing Role: Precision digitizer for low-level resistance-derived voltage; uses AIN1/AIN2 in buffered mode with 128× gain and 50 Hz notch filtering. Use Value: Achieves <0.1 °C resolution without external excitation current regulation or cold-junction compensation ICs. |
| Smart Valve Position Feedback | Chart Recorder Signal Conditioning |
|
Use Scenario: Converting potentiometer-based linear position feedback (0–10 V) and Hall-effect current sense (±50 mV) in a servo valve controller. IC Role / Device Role / Timing Role: Dual-range ADC managing both high-level AIN3 (0–10 V) and low-level AIN2 (±50 mV) simultaneously with independent gain settings. Use Value: Enables single-chip acquisition of actuator command and coil current diagnostics, reducing PCB area and inter-channel crosstalk. |
Use Scenario: Digitizing legacy analog recorder inputs (±5 V, ±10 V) while preserving millivolt-level thermocouple traces (±10 mV) on same board. IC Role / Device Role / Timing Role: Multi-range analog front end providing galvanically isolated channel routing via software-configured input multiplexer and PGA. Use Value: Replaces discrete op-amp + multiplexer + ADC combinations, cutting calibration complexity and long-term drift accumulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7714BRUZ | 5-channel, 24-bit, higher resolution but 2.7 mW typical power at 5 V; lacks ±100 mV true bipolar on low-level inputs. | Better suited for high-resolution weigh scales; less optimal for cost-sensitive 16-bit transducer interfaces requiring ultra-low power. | Select AD7707BRZ-REEL7 when 16-bit accuracy, <1 mW consumption, and ±100 mV bipolar input are mandatory. |
| ADS124S08IPWR | 24-bit, 4-channel, integrated PGA and burn-out current sources; 1.2 mW at 3 V; SPI interface but no Schmitt-triggered SCLK. | Includes diagnostic features (sensor fault detection) absent in AD7707; targets predictive maintenance systems. | Choose AD7707BRZ-REEL7 for proven industrial reliability, simpler register map, and guaranteed ±0.003% INL at lower system cost. |
Compared with AD7714BRUZ and ADS124S08IPWR, the AD7707BRZ-REEL7 offers superior power efficiency (<1 mW), deterministic ±100 mV bipolar input handling, and robust noise immunity via Schmitt-triggered SCLK - making it optimal for space-constrained, battery-operated, or EMI-prone industrial sensor nodes where 16-bit fidelity suffices.
Availability
AD7707BRZ-REEL7 is available at Aetrix Electronics and suitable for pressure measurement, RTD sensing, smart valve control, and chart recorder signal conditioning requiring stable component supply and long-term industrial availability.
Supply support for AD7707BRZ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD7707BRZ-REEL7 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for low-frequency industrial measurement systems requiring integrated signal conditioning, low power, and high DC accuracy without external components.
FAQ
What is the maximum input voltage range supported by AD7707BRZ-REEL7 on its high-level channel?
The AD7707BRZ-REEL7 supports ±10 V, ±5 V, 0 V to 10 V, and 0 V to 5 V input ranges on its high-level channel (AIN3), referenced to HICOM. This is achieved using on-chip thin-film resistors, eliminating the need for external attenuators or split supplies. The absolute input voltage must remain within AGND −100 mV to AVDD +30 mV for specified performance.
Does AD7707BRZ-REEL7 support true bipolar operation on its low-level input channels?
Yes, the AD7707BRZ-REEL7 supports true bipolar ±100 mV operation on AIN1 and AIN2 when configured in unbuffered mode with gain = 16. This capability allows direct connection of Wheatstone bridge transducers without external level-shifting circuitry, maintaining full 16-bit resolution and ±0.003% INL across the range.
What serial interface protocols is AD7707BRZ-REEL7 compatible with?
The AD7707BRZ-REEL7 features a 3-wire serial interface fully compatible with SPI, QSPI™, MICROWIRE™, and DSP protocols. Its SCLK input includes a Schmitt trigger for enhanced noise immunity, and DRDY serves as a hardware-ready indicator to synchronize data reads without polling overhead.
How does the AD7707BRZ-REEL7 handle calibration for production systems?
The AD7707BRZ-REEL7 supports both on-chip self-calibration (removing internal offset/gain errors) and system calibration (correcting external sensor and PCB-level errors). Calibration coefficients are stored in dedicated registers and applied automatically during conversion, enabling zero manual trimming in final test.
What is the power consumption of AD7707BRZ-REEL7 in standby mode?
The AD7707BRZ-REEL7 draws ≤8 μA maximum standby current when AVDD = 3 V and the external master clock is disabled. With clock running in standby, current rises to ~75 μA typical. Total normal-mode power dissipation is 1.05 mW max at 3 V, making it suitable for energy-harvesting and battery-backed applications.
AD7707BRZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 500
- Number of Inputs:
- 1, 2
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.3V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.3V, 5V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7707BRZ-REEL7 FAQ
1.How can I place an order for AD7707BRZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7707BRZ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7707BRZ-REEL7 reliable?
The price and inventory of AD7707BRZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7707BRZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7707BRZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7707BRZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7707BRZ-REEL7?
AD7707BRZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7707BRZ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7707BRZ-REEL7?
For technical support, including AD7707BRZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7707BRZ-REEL7 requirements.
6.How does Aetrix verify that AD7707BRZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7707BRZ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7707BRZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7707BRZ-REEL7?
All AD7707BRZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7707BRZ-REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7707BRZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7707BRZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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