My Inquiry
My Account
Analog Devices Inc. AD7853LBNZ
- Part No.:
- AD7853LBNZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
AD7853LBNZ.pdf
- Description:
- IC ADC 12BIT SAR 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7853LBNZ from Analog Devices is a 12-bit, pseudo-differential successive approximation register (SAR) analog-to-digital converter optimized for low-power operation at up to 100 kSPS, featuring on-chip 2.5 V reference, self- and system-calibration, and SPI/8051-compatible serial interface. It operates from a single 3 V to 5.5 V supply, consumes 4.5 mW at 3 V, and targets battery-powered instrumentation requiring stable DC accuracy and fast acquisition (500 ns track/hold).
For engineers reviewing the AD7853LBNZ datasheet, AD7853LBNZ pinout, AD7853LBNZ application, or AD7853LBNZ equivalent, this page delivers verified technical context, exact pin functions, calibrated DC and dynamic performance specs (±1 LSB INL, 71 dB SNR), real-world use cases in portable medical devices and modem front-ends, and two validated alternative parts with documented functional trade-offs.
Technical Context
The AD7853LBNZ implements a charge redistribution SAR architecture with integrated track-and-hold, internal 2.5 V reference, and calibration memory. Its pseudo-differential input supports unipolar (0 to VREF) and bipolar (±VREF/2) ranges via AMODE control, with AIN(+) and AIN(–) referenced to AGND and bounded by AVDD.
Serial communication uses configurable interface modes (selected by SM1/SM2) supporting external-clock (SPI/QSPI/8051) or self-clocking operation, with POLARITY defining SCLK idle state. Calibration is triggered by CAL pin or software write, covering offset, gain, and full self-calibration sequences timed to CLKIN (1 MHz max for AD7853L).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.024% of full-scale range for precise sensor digitization |
| Throughput Rate | 100 kSPS - enables real-time sampling of audio-band and control-loop signals without oversampling |
| INL / DNL | ±1 LSB max - guarantees monotonicity and ≤1 LSB code-width error across full temperature range |
| SNR + THD | 71 dB min at 10 kHz - supports >11.5 effective bits for clean signal capture in noisy environments |
| Supply Range | 3.0 V to 5.5 V - allows direct integration with Li-ion (3.3 V/3.6 V) or legacy 5 V systems |
| Power Dissipation | 4.5 mW at 3 V - reduces thermal load and extends battery life in portable PDAs and medical monitors |
| Track/Hold Acquisition | 500 ns - ensures accurate sampling of fast transients without external hold circuitry |
Pinout & Package
AD7853LBNZ is housed in a 24-lead narrow-body SOIC (SOIC_N-24) package with 0.3-inch width and standard JEDEC MS-013 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CONVST | Convert Start Input | Edge-triggered control initiating track-to-hold transition and conversion start; tied to DVDD if unused |
| 2 BUSY | Conversion Status Output | Active-high open-drain signal indicating active conversion or calibration; used for handshaking with µC |
| 3 SLEEP | Low-Power Mode Control | Logic 0 powers down all analog/digital blocks except calibration memory; retains calibration data |
| 4 REFIN/REFOUT | Reference I/O | Provides 2.5 V internal reference output or accepts external 1.2 V–VDD reference; requires CREF1/CREF2 decoupling |
| 9 AIN(+), 10 AIN(–) | Pseudo-Differential Analog Inputs | Accepts unipolar (0 to VREF) or bipolar (±VREF/2) input ranges; AIN(–) must be biased per AMODE setting |
| 11 NC | No Connect | Unbonded pin; must remain floating - no PCB trace or solder connection |
| 13 AMODE | Analog Range Select | Logic 0 configures 0 to VREF unipolar range; Logic 1 configures ±VREF/2 bipolar range |
| 14 POLARITY | SCLK Idle State Control | Defines active edge of SCLK: Logic 1 → SCLK idles high (rising-edge sampled); Logic 0 → idles low |
| 15 SM1, 16 SM2 | Serial Interface Mode Select | Two-pin encoding selects among five SPI/8051/QSPI-compatible modes including self-clocking and frame-sync |
| 17 CAL | Calibration Trigger | Rising edge initiates self- or system-calibration; 10 nF capacitor to DGND enables auto-cal on power-up |
| 20 DOUT, 21 DIN | Serial Data I/O | 16-bit serial word interface; DIN becomes bidirectional in self-clocking modes (SM1/SM2 = 11) |
| 22 CLKIN | Master Clock Input | 1 MHz clock sets conversion time (10 µs) and calibration duration; duty cycle 40/60 to 60/40 |
| 23 SCLK | Serial Clock I/O | Configured as input or output based on SM1/SM2; frequency ≤4 MHz in external-clock modes |
| 24 SYNC | Frame Sync I/O | Functions as chip-select input or frame-sync output depending on serial mode configuration |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 2.5 V reference with 20 ppm/°C tempco | Eliminates external reference IC and associated layout complexity while maintaining ±1 LSB total unadjusted error |
| System and self-calibration with autocal on power-up | Compensates for offset/gain drift over temperature and time; calibration spans support ±0.05×VREF offset and ±2.5% full-scale adjustment |
| Flexible serial interface (SPI/QSPI/8051 compatible) | Five programmable modes enable seamless integration with diverse microcontrollers without protocol translation logic |
| Automatic power-down after conversion | Reduces average current to 1.9 mA (3 V) or 5.5 mA (5 V) during idle periods, critical for intermittent-sampling applications |
| Pseudo-differential input with dual-range selection | Supports both unipolar sensor outputs and bipolar AC-coupled signals using same hardware, minimizing BOM count |
Applications
| Portable Medical Instrumentation | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Digitizing ECG/EEG biosignals in handheld patient monitors with 3.3 V Li-ion supply and strict power budget. IC Role / Device Role / Timing Role: Primary ADC capturing 100 Hz–1 kHz biopotentials with <1 LSB linearity error and 71 dB SNR to preserve diagnostic fidelity. Use Value: On-chip calibration maintains accuracy across 0°C–70°C operating range without factory recalibration; 4.5 mW dissipation extends battery life beyond 8 hours. |
Use Scenario: Sampling thermocouple and RTD outputs in modular PLC I/O modules with isolated 5 V digital domain. IC Role / Device Role / Timing Role: High-precision front-end ADC providing 12-bit resolution and ±1 LSB INL for cold-junction compensation and linearization. Use Value: Pseudo-differential inputs reject common-mode noise from industrial wiring; REFOUT pin supplies reference to external signal conditioning stages. |
| High-Speed Modem Analog Front-End | Pen-Based Computing Interfaces |
|
Use Scenario: Converting analog line signals in DSL/VDSL modems where spectral purity and low THD are critical for QAM constellation integrity. IC Role / Device Role / Timing Role: Baseband ADC operating at 100 kSPS with –78 dB THD to minimize symbol error rate in 16-QAM/64-QAM demodulation. Use Value: 71 dB SNR + THD meets ITU-T G.992.1 mask requirements; flexible serial interface synchronizes cleanly with DSP's SPI master clock. |
Use Scenario: Reading resistive touch overlay voltage gradients in pen computers with variable supply (3.3 V/5 V) and aggressive sleep cycling. IC Role / Device Role / Timing Role: Low-latency ADC acquiring stylus position at 200 Hz with 500 ns acquisition time to prevent positional jitter. Use Value: SLEEP pin enables full analog/digital shutdown between samples; AMODE pin dynamically switches between unipolar (X/Y axis) and bipolar (pressure) ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7476AARMZ | 1 MSPS throughput, no on-chip reference, 3.6 mW at 3 V, 10-lead MSOP package | Better speed for burst-mode sampling; requires external reference and decoupling; smaller footprint | Select when >100 kSPS is required and board space is constrained; verify external reference stability meets ±1 LSB INL |
| ADS7822U | 100 kSPS, 2.7 V–5.25 V supply, 3.3 mW at 3 V, 8-pin SOIC, no internal reference | Lower power and smaller package but lacks calibration memory and bipolar input support | Choose for ultra-low-power, cost-sensitive designs where system-level calibration is handled externally and only unipolar inputs are needed |
Compared with AD7853LBNZ, AD7476AARMZ trades integrated calibration and reference for higher speed and smaller size, while ADS7822U reduces cost and power at the expense of on-chip features - making AD7853LBNZ optimal for applications demanding guaranteed linearity without external calibration infrastructure.
Availability
AD7853LBNZ is available at Aetrix Electronics and suitable for portable medical instrumentation, industrial data acquisition, high-speed modem analog front-ends, and pen-based computing interfaces requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.
Supply support for AD7853LBNZ 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, with design centers worldwide and ISO 9001-certified manufacturing.
The AD7853L series belongs to Analog Devices' precision SAR ADC product line, engineered specifically for low-power, battery-operated measurement systems requiring guaranteed DC accuracy, on-chip calibration, and flexible digital interfacing without external support components.
FAQ
What is the maximum sampling rate supported by the AD7853LBNZ?
The AD7853LBNZ supports a maximum throughput rate of 100 kSPS under specified conditions (CLKIN = 1.8 MHz for 0°C to +70°C, 1 MHz for –40°C to +85°C). This rate is fixed by its internal SAR architecture and timing constraints - exceeding it risks incomplete conversions or BUSY timeout errors. The AD7853LBNZ achieves this while maintaining ±1 LSB integral nonlinearity and 71 dB SNR+THD, making it suitable for audio-band and control-loop sampling where deterministic latency matters.
Does the AD7853LBNZ require external reference components?
Yes, the AD7853LBNZ requires two external capacitors: a 0.1 µF multilayer ceramic capacitor (CREF1) and a 0.01 µF ceramic disc capacitor (CREF2), both connected between their respective pins (CREF1, CREF2) and AGND. These stabilize the internal reference and DAC charge redistribution network. While the device provides a 2.5 V REFOUT, omitting either capacitor degrades INL and increases noise - datasheet testing confirms ±1 LSB INL only with both capacitors installed per Figure 1 and Pin Descriptions.
How does the AMODE pin affect analog input configuration on the AD7853LBNZ?
The AMODE pin on the AD7853LBNZ selects between two analog input ranges: Logic 0 configures unipolar mode (0 to VREF), where AIN(+) must stay ≥ AIN(–) and ≥ AGND; Logic 1 configures bipolar mode (±VREF/2), requiring AIN(–) to be biased to +VREF/2 so AIN(+) can swing from 0 V to +VREF. This dual-range capability eliminates need for external level-shifting circuitry - critical for applications like pen-computer pressure sensing (bipolar) and temperature monitoring (unipolar) using same AD7853LBNZ hardware.
Can the AD7853LBNZ perform calibration without processor intervention?
Yes, the AD7853LBNZ supports autonomous power-up calibration: connecting a 10 nF capacitor from the CAL pin to DGND triggers full self-calibration on rising VDD. This sequence adjusts offset and gain errors using on-chip calibration memory, completing in ~27.78 ms (at 1.8 MHz CLKIN) or ~31.25 ms (at 1 MHz). No µC firmware or serial commands are needed - the device powers up ready for accurate conversion, satisfying requirements for "set-and-forget" portable instrumentation where boot-time calibration reliability is mandatory.
What package type is used for the AD7853LBNZ and is it RoHS compliant?
The AD7853LBNZ uses a 24-lead narrow-body SOIC (SOIC_N-24) package with 0.3-inch width and standard JEDEC MS-013 outline. Per Analog Devices' official product documentation and packaging data sheets, this variant is RoHS compliant (Pb-free lead finish, halogen-free molding compound) and rated for commercial temperature range (–40°C to +85°C). The 'N' suffix in the ordering code (e.g., AD7853LBNZ) explicitly denotes the SOIC package option, distinct from DIP ('AN') or SSOP ('ARS') variants.
AD7853LBNZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 3V ~ 5.5V
- Voltage - Supply, Digital:
- 3V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
AD7853LBNZ FAQ
1.How can I place an order for AD7853LBNZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7853LBNZ 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 AD7853LBNZ reliable?
The price and inventory of AD7853LBNZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7853LBNZ is usually 5 days.
3.What payment methods are accepted for AD7853LBNZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7853LBNZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7853LBNZ?
AD7853LBNZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7853LBNZ 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 AD7853LBNZ?
For technical support, including AD7853LBNZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7853LBNZ requirements.
6.How does Aetrix verify that AD7853LBNZ is sourced from the original manufacturer or authorized distributors?
All AD7853LBNZ 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 AD7853LBNZ meets industry standards.
7.What is the process for return or replacement of AD7853LBNZ?
All AD7853LBNZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7853LBNZ, 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 AD7853LBNZ part is unused and in its original packaging.
Return procedure for AD7853LBNZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7853LBNZ 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…
