My Inquiry
My Account
Analog Devices Inc. AD7170BCPZ-REEL7
- Part No.:
- AD7170BCPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
AD7170BCPZ-REEL7.pdf
- Description:
- IC ADC 12BIT SIGMA-DELTA 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,040
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7170BCPZ-REEL7 from Analog Devices is a 12-bit sigma-delta analog-to-digital converter (ADC) with integrated oscillator, differential input, gain of 1, and 125 Hz output data rate. It consumes 135 µA at 5 V and operates from 2.7 V to 5.25 V across −40°C to +105°C - optimized for low-power sensor signal digitization in portable instrumentation and industrial process control.
For engineers reviewing the AD7170BCPZ-REEL7 datasheet, AD7170BCPZ-REEL7 pinout, AD7170BCPZ-REEL7 application, or AD7170BCPZ-REEL7 equivalent, key selection criteria include its 12-bit noise-free resolution at 3 V/5 V reference, Schmitt-triggered SCLK interface, dual-role DOUT/RDY pin with status bits, and LFCSP-10 package compatibility with space-constrained PCB layouts.
Technical Context
The AD7170BCPZ-REEL7 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 common-mode voltage from GND to VDD, requiring external R-C filtering per Table 7 to avoid 12-bit gain error.
It uses offset binary coding and features a dedicated PDRST pin that simultaneously enables power-down (5 µA) and full logic/digital-filter/analog-modulator reset. The internal 64 kHz ±5% oscillator eliminates external clock components, and all configuration is pin-driven - no register programming required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit noise-free (p-p), confirmed at both 3 V and 5 V reference - ensures stable code stability without flicker in low-frequency measurements. |
| Output Data Rate | 125 Hz fixed - defines conversion interval (8 ms) and determines minimum step-response latency in closed-loop systems. |
| Supply Current | 135 µA typical at 5 V - enables multi-year battery life in portable pressure or temperature sensors. |
| Power-Down Current | 5 µA - reduces system standby power while preserving state for rapid wake-up. |
| Input Range | Differential ±VREF (up to ±5 V), unbuffered - requires matched source impedance <900 Ω for ≤12-bit gain error. |
| RMS Noise | 6.9 µV at 3 V reference - sets minimum detectable signal change (~1.7 µV LSB) in precision transducer interfaces. |
| Operating Temp | −40°C to +105°C - qualified for industrial process control enclosures and automotive under-hood auxiliary sensing. |
Pinout & Package
AD7170BCPZ-REEL7 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; supports continuous or burst clocking - eliminates need for clean clock edge conditioning. |
| DOUT/RDY | Dual-function output | Active-low data-ready flag + 24-bit serial output (12-bit result + 8 status bits) - enables interrupt-driven read without polling. |
| AIN(+), AIN(−) | Differential analog input | Unbuffered, high-impedance dynamic load - requires source impedance <900 Ω to prevent gain error at 12-bit level. |
| REFIN(+), REFIN(−) | Differential reference input | Accepts 0.5 V to VDD reference; unbuffered - demands low-impedance reference source (e.g., ADR391) to avoid gain drift. |
| VDD, GND (Pins 7 & 10) | Power supply terminals | Single 2.7–5.25 V rail; dual GND pins improve PSRR and reduce ground bounce in noisy environments. |
| PDRST | Power-down/reset control | Active-low; initiates full chip reset and tristates DOUT/RDY - enables deterministic startup and ultra-low standby current. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-programmable operation | No configuration registers - all functions (power-down, reset, data read) controlled directly via dedicated pins for simplified firmware. |
| Status-bit validation | 8 appended status bits per read (RDY, ERR, ID, PAT pattern) - enables real-time CRC-like verification of serial transfer integrity. |
| Integrated oscillator | 64 kHz ±5% on-chip clock - eliminates external crystal/capacitor, reducing BOM count and layout sensitivity. |
| Offset binary coding | Zero-differential input = 0x800 (12-bit center code) - simplifies software scaling for bipolar ratiometric sensor bridges. |
| Low-noise analog path | 90 dB DC common-mode rejection, 85 dB PSRR - maintains accuracy when powered from noisy shared rails in industrial modules. |
Applications
| Pressure Measurement | Industrial Process Control |
|---|---|
|
Use Scenario: Digitizing output of piezoresistive pressure sensors in handheld gauges or HVAC transmitters. IC Role / Device Role / Timing Role: Primary ADC capturing slow-varying bridge signals with 12-bit repeatability and minimal self-heating error. Use Value: 6.9 µV RMS noise at 3 V reference enables sub-0.1%FS resolution on 100 mV/V bridge outputs without external amplification. |
Use Scenario: Monitoring temperature, flow, or level in PLC I/O modules with wide ambient operating range. IC Role / Device Role / Timing Role: Isolated analog front-end ADC interfacing to thermocouples or RTDs via external signal conditioning. Use Value: −40°C to +105°C rating and 250 nV/°C offset drift ensure calibration stability over full industrial temperature span. |
| Portable Instrumentation | Low-Power Sensor Nodes |
|
Use Scenario: Battery-powered multimeters or environmental monitors requiring multi-year operation on coin cells. IC Role / Device Role / Timing Role: Core digitizer enabling duty-cycled measurement with 5 µA deep-sleep mode between readings. Use Value: 135 µA active current and pin-controlled power-down extend CR2032 battery life beyond 5 years at 1-sample/second duty cycle. |
Use Scenario: Wireless sensor nodes using LoRaWAN or NB-IoT where MCU and radio dominate power budget. IC Role / Device Role / Timing Role: Ultra-low-quiescent ADC minimizing contribution to total system sleep current. Use Value: 5 µA power-down current prevents ADC from becoming bottleneck in sub-10 µA system sleep targets. |
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-REEL7 | 16-bit resolution, identical pinout and interface - same 125 Hz data rate and 135 µA supply current. | Higher-resolution measurement where 12-bit noise floor is insufficient (e.g., high-precision weigh scales). | Select when ENOB >12 bits is required; drop-in replacement with no layout or firmware changes. |
| ADS1115IDGSR | I²C interface, programmable gain amplifier (PGA), 860 µA active current - no internal oscillator or PDRST pin. | Systems needing flexible gain (±256 mV to ±6.144 V) and multi-channel capability (4 inputs) with microcontroller I²C support. | Choose for designs prioritizing interface flexibility and PGA integration over lowest possible quiescent current. |
Compared with AD7170BCPZ-REEL7, AD7171BCPZ-REEL7 delivers 4 extra bits of resolution without increasing power or changing footprint, while ADS1115IDGSR trades ultra-low power for I²C convenience and on-chip PGA - making it suitable for less power-constrained, multi-sensor systems.
Availability
AD7170BCPZ-REEL7 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-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, 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 low-power sigma-delta ADC product line, designed specifically for battery-operated and space-constrained industrial sensor interfaces demanding 12-bit accuracy with minimal power overhead.
FAQ
What is the maximum allowed source impedance for the AIN(+) and AIN(−) inputs of the AD7170BCPZ-REEL7?
The AD7170BCPZ-REEL7 has an unbuffered differential input. To avoid gain error exceeding 1 LSB at 12-bit resolution, the external series resistance must be ≤900 Ω when paired with ≤1000 pF capacitance, per Table 7 in the datasheet. Higher impedances introduce voltage division errors due to dynamic input loading during sampling.
Does the AD7170BCPZ-REEL7 require an external clock source?
No, the AD7170BCPZ-REEL7 integrates a 64 kHz ±5% internal oscillator. This eliminates the need for external crystals, resonators, or clock generators, simplifying design and reducing bill-of-materials cost. The SCLK pin only serves as a synchronous read strobe - not a master clock input.
How does the DOUT/RDY pin function during data read operations in the AD7170BCPZ-REEL7?
In the AD7170BCPZ-REEL7, DOUT/RDY serves two roles: it asserts low to signal valid conversion data (RDY function), then shifts out a 24-bit word (12-bit result + 4 zeros + 8 status bits) on each SCLK falling edge. After full read completion, the pin returns high; if unread, it goes high before the next conversion update to prevent invalid reads.
Can the AD7170BCPZ-REEL7 operate with a 3.3 V supply and still achieve full 12-bit performance?
Yes, the AD7170BCPZ-REEL7 is fully specified from 2.7 V to 5.25 V. At 3.3 V supply with 3.3 V reference, it delivers 12-bit noise-free resolution and 6.9 µV RMS noise - matching datasheet Table 6. All timing, offset, and gain specifications remain valid across this voltage range.
What is the purpose of the eight status bits transmitted with each conversion in the AD7170BCPZ-REEL7?
The eight status bits appended to each AD7170BCPZ-REEL7 conversion include RDY (data ready), ERR (input out-of-range flag), ID1/ID0 (device identification), and PAT2–PAT0 (fixed 101 pattern). These enable firmware to verify serial transfer integrity, detect overrange conditions, and confirm device identity - eliminating need for separate status polling.
AD7170BCPZ-REEL7 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-REEL7 FAQ
1.How can I place an order for AD7170BCPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7170BCPZ-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 AD7170BCPZ-REEL7 reliable?
The price and inventory of AD7170BCPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7170BCPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7170BCPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7170BCPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7170BCPZ-REEL7?
AD7170BCPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7170BCPZ-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 AD7170BCPZ-REEL7?
For technical support, including AD7170BCPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7170BCPZ-REEL7 requirements.
6.How does Aetrix verify that AD7170BCPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7170BCPZ-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 AD7170BCPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7170BCPZ-REEL7?
All AD7170BCPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7170BCPZ-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 AD7170BCPZ-REEL7 part is unused and in its original packaging.
Return procedure for AD7170BCPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7170BCPZ-REEL7 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
