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Analog Devices Inc. AD7170BCPZ-500RL7
- Part No.:
- AD7170BCPZ-500RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
AD7170BCPZ-500RL7.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:467
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Product details
Overview
AD7170BCPZ-500RL7 from Analog Devices is a 12-bit sigma-delta ADC optimized for low-power, high-accuracy sensor signal acquisition in battery-powered systems. It delivers 125 Hz output data rate, 135 µA typical supply current at 5 V, and 12-bit noise-free resolution with ±0.1 LSB INL - enabling precise pressure and temperature measurement in portable instrumentation.
For engineers reviewing the AD7170BCPZ-500RL7 datasheet, AD7170BCPZ-500RL7 pinout, AD7170BCPZ-500RL7 application, or AD7170BCPZ-500RL7 equivalent, key selection considerations include its 2-wire serial interface, differential input architecture, internal 64 kHz oscillator, 2.7–5.25 V supply range, and guaranteed operation from −40°C to +105°C.
Technical Context
The AD7170BCPZ-500RL7 implements a sinc3 digital filter with fixed 125 Hz output data rate and 24 ms settling time after reset. Its unbuffered differential analog input accepts ±VREF range with gain = 1, requiring external R-C filtering per Table 7 to avoid 12-bit gain error.
It uses offset binary coding and outputs 24-bit frames: 12-bit conversion result + four zero bits + eight status bits (RDY, ERR, ID, PAT). The Schmitt-triggered SCLK supports variable clocking, and DOUT/RDY serves dual role as data-ready flag and serial output with tristate control via PDRST.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit noise-free (p-p), confirmed at both 3 V and 5 V reference |
| Output Data Rate | 125 Hz - defines minimum sampling interval (8 ms) and system update latency |
| Supply Current | 135 µA typical at 5 V - enables multi-year battery life in portable devices |
| Power-Down Current | 5 µA - reduces quiescent draw during idle periods without losing configuration |
| Input Voltage Range | ±VREF differential, with absolute limits GND−30 mV to VDD+30 mV |
| Reference Range | 0.5 V to VDD - supports ratiometric transducer interfaces using same excitation source |
| Operating Temp | −40°C to +105°C - qualified for industrial process control and automotive under-hood environments |
Pinout & Package
AD7170BCPZ-500RL7 is housed in a 10-lead, 3 mm × 3 mm LFCSP package with exposed pad soldered to ground. Pin 1 is marked by index area; exposed pad must be connected to GND for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK | Serial clock input | Schmitt-triggered; accepts continuous or burst clocking; timing-critical for data capture |
| DOUT/RDY | Dual-function terminal | Active-low data-ready flag AND serial data output; tristated during PDRST low |
| AIN(+), AIN(−) | Differential analog input | Unbuffered; dynamic load requires impedance-matched external RC per Table 7 |
| REFIN(+), REFIN(−) | Differential reference input | Unbuffered; high-impedance dynamic load; decoupling capacitors only acceptable with low-Z sources |
| VDD | Power supply | 2.7–5.25 V; requires 10 µF + 0.1 µF local decoupling to analog ground |
| GND (Pins 7 & 10) | Analog/digital ground reference | Must connect to system AGND; exposed pad tied to same plane |
| PDRST | Power-down/reset control | Active-low; initiates full logic reset and powers down internal oscillator (1 ms wake-up) |
Key Features
| Feature | Design Value |
|---|---|
| Pin-programmable power-down | Reduces current to 5 µA without external control logic or firmware overhead |
| Status-bit appended reads | 8-bit status frame (RDY/ERR/ID/PAT) enables real-time CRC-like validation of each 12-bit conversion |
| Internal 64 kHz oscillator | Eliminates external crystal or clock source - simplifies BOM and layout for space-constrained designs |
| 2-wire serial interface | Minimizes PCB routing complexity and I/O count; compatible with SPI controllers in read-only mode |
| Offset binary coding | Direct mapping of bipolar input range to unsigned 12-bit word - simplifies host MCU arithmetic |
Applications
| Pressure Measurement | Industrial Process Control |
|---|---|
Use Scenario: Monitoring gas or liquid pressure in handheld calibrators and remote sensors. IC Role / Device Role / Timing Role: Primary ADC digitizing bridge output from piezoresistive or capacitive pressure transducers. Use Value: 12-bit noise-free resolution ensures sub-0.1% FS accuracy; low 135 µA current extends battery life beyond 5 years in intermittent-read deployments. |
Use Scenario: Closed-loop feedback in PLC-based flow, level, or temperature control systems. IC Role / Device Role / Timing Role: High-stability analog front-end for 4–20 mA loop receivers and RTD/thermistor interfaces. Use Value: −40°C to +105°C rating and 85 dB PSRR enable reliable operation near motors, valves, and heating elements without external compensation. |
| Portable Instrumentation | Temperature Monitoring Systems |
Use Scenario: Handheld multimeters, environmental data loggers, and field service testers. IC Role / Device Role / Timing Role: Core converter in ultra-low-power signal chain with integrated reference and minimal external components. Use Value: Internal oscillator and 2-wire interface reduce component count by ≥3 vs. competing ADCs; 3 mm × 3 mm LFCSP fits sub-10 cm² PCB footprints. |
Use Scenario: Precision thermistor or RTD measurements in HVAC, medical devices, and battery pack thermal management. IC Role / Device Role / Timing Role: Ratiometric ADC where excitation voltage drives both sensor and REFIN(±) inputs. Use Value: Common-mode rejection >90 dB and 110 dB ref CMRR suppress excitation noise; 12-bit ENOB maintained across full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit low-power sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7171BCPZ-500RL7 | 16-bit resolution, identical pinout and interface; 170 µA supply current | Higher precision required; tolerates higher system power budget | Select when ENOB >12 bits needed without changing layout or firmware |
| ADS1115IRUGT | I²C interface, programmable gain amplifier (PGA), 860 µA active current | Requires gain scaling; suited for single-ended or small-signal inputs | Choose when flexible input range and I²C bus compatibility outweigh power penalty |
Compared with AD7170BCPZ-500RL7, AD7171BCPZ-500RL7 offers higher resolution at modest current cost and identical footprint, while ADS1115IRUGT trades lower power efficiency for integrated PGA and I²C simplicity - making each suitable for distinct signal chain architectures.
Availability
AD7170BCPZ-500RL7 is available at Aetrix Electronics and suitable for pressure measurement, industrial process control, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7170BCPZ-500RL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7170 belongs to Analog Devices' precision sigma-delta ADC product line, engineered specifically for low-power, high-accuracy sensor signal acquisition in battery-operated and industrial measurement systems.
FAQ
What is the maximum allowed reference voltage for AD7170BCPZ-500RL7?
The AD7170BCPZ-500RL7 supports an external reference voltage range of 0.5 V to VDD, where VDD is between 2.7 V and 5.25 V. Therefore, the maximum reference voltage is 5.25 V when operating at the upper supply limit. Exceeding VDD or falling below 0.5 V risks invalid conversion or damage per Absolute Maximum Ratings.
Does AD7170BCPZ-500RL7 support bipolar input signals?
Yes, AD7170BCPZ-500RL7 accepts bipolar differential input signals within ±VREF, but it does not tolerate negative voltages relative to GND. The input common-mode range is GND to VDD, so bipolar operation requires setting AIN(−) to a mid-supply bias (e.g., 2.5 V) to shift the effective input window - as shown in Figure 14 of the datasheet.
How does the status bit pattern (PAT2–PAT0) function in AD7170BCPZ-500RL7?
In every 24-bit read from AD7170BCPZ-500RL7, the final three status bits (PAT2–PAT0) default to 101. This pattern allows firmware to verify serial transfer integrity: if the received pattern differs, the host MCU can flag a communication error without requiring additional checksum logic or retransmission protocols.
Can AD7170BCPZ-500RL7 operate with a 3.3 V supply and 3.3 V reference?
Yes, AD7170BCPZ-500RL7 is fully specified for 3.3 V operation: supply voltage (2.7–5.25 V), reference voltage (0.5–VDD), and logic thresholds all support 3.3 V. At this supply, RMS noise drops to 6.9 µV and p-p resolution remains 12 bits - delivering optimal performance for low-voltage embedded systems.
What is the purpose of the PDRST pin on AD7170BCPZ-500RL7?
The PDRST pin on AD7170BCPZ-500RL7 serves dual functions: asserting it low places the device in 5 µA power-down mode (disabling oscillator and tristating DOUT/RDY), and releasing it high performs a full hardware reset - clearing digital filters, logic states, and analog modulator - with 1 ms internal clock stabilization before first conversion.
AD7170BCPZ-500RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 10-LFCSP-WD (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7170BCPZ-500RL7 FAQ
1.How can I place an order for AD7170BCPZ-500RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7170BCPZ-500RL7 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 AD7170BCPZ-500RL7 reliable?
The price and inventory of AD7170BCPZ-500RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7170BCPZ-500RL7 is usually 5 days.
3.What payment methods are accepted for AD7170BCPZ-500RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7170BCPZ-500RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7170BCPZ-500RL7?
AD7170BCPZ-500RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7170BCPZ-500RL7 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 AD7170BCPZ-500RL7?
For technical support, including AD7170BCPZ-500RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7170BCPZ-500RL7 requirements.
6.How does Aetrix verify that AD7170BCPZ-500RL7 is sourced from the original manufacturer or authorized distributors?
All AD7170BCPZ-500RL7 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 AD7170BCPZ-500RL7 meets industry standards.
7.What is the process for return or replacement of AD7170BCPZ-500RL7?
All AD7170BCPZ-500RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7170BCPZ-500RL7, 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 AD7170BCPZ-500RL7 part is unused and in its original packaging.
Return procedure for AD7170BCPZ-500RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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