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Analog Devices Inc. LTC1290BCN#PBF
- Part No.:
- LTC1290BCN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1290BCN#PBF.pdf
- Description:
- IC DAS/ADC 12BIT 50K 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
LTC1290BCN#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 8-channel serial-output sampling data acquisition system with integrated sample-and-hold, successive approximation ADC, and configurable analog multiplexer. It supports single-ended or differential inputs, ±5V common-mode range, 50kHz max throughput, and operates from single +5V or dual ±5V supplies. It is used in industrial sensor monitoring systems requiring precise multi-channel voltage digitization.
For engineers reviewing the LTC1290BCN#PBF datasheet, LTC1290BCN#PBF pinout, LTC1290BCN#PBF application, or LTC1290BCN#PBF equivalent, key selection criteria include guaranteed 12-bit no-missing-codes resolution, software-programmable unipolar/bipolar mode, MSB/LSB-first serial output, 13µs max conversion time, and compatibility with MICROWIRE/SPI microprocessor interfaces.
Technical Context
The LTC1290BCN#PBF implements an LTCMOS switched-capacitor SAR architecture with on-chip sample-and-hold for all single-ended channels. Its 8:1 analog multiplexer supports four differential or eight single-ended input configurations, with COM pin defining the zero-reference for single-ended measurements.
Serial communication uses a four-wire synchronous interface (CS, SCLK, DIN, DOUT) supporting full-duplex operation. Conversion timing is governed by ACLK (max 4MHz), while SCLK controls data transfer (max 2MHz); the device accepts 8-bit configuration words to set MUX address, unipolar/bipolar mode, MSB/LSB order, word length (8/12/16 bits), and power shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit unipolar or 11-bit-plus-sign bipolar - guarantees monotonicity and no missing codes over full temperature range. |
| Input Channels | 8 single-ended or 4 differential - configurable via 4-bit MUX address in DIN command word. |
| Throughput Rate | 50kHz maximum - enables real-time sampling of fast-changing analog signals in control loops. |
| Conversion Time | 13µs maximum over temperature - ensures deterministic latency for time-critical acquisition. |
| Supply Current | 6.0mA typical active, 5–15µA in power shutdown - supports low-power portable or battery-backed systems. |
| Analog Input Range | 0V to 5V (unipolar) or ±5V (bipolar) - matches standard industrial sensor outputs and op-amp rails. |
| Reference Input | REF+ and REF− pins accept external 5V reference - enables high-accuracy ratiometric or absolute measurements. |
Pinout & Package
Package: 20-lead PDIP (N package), 0°C to 70°C operating temperature range (B grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Accept single-ended or differential voltage inputs; each channel has ≤1µA leakage current at 25°C. |
| COM (Pin 9) | Common Reference | Zero-reference point for all single-ended inputs; must be low-noise and tied directly to AGND plane. |
| DGND (Pin 10) | Digital Ground | Return path for internal logic; separate from AGND to prevent digital noise coupling into analog path. |
| AGND (Pin 11) | Analog Ground | Reference for analog circuitry including S/H and ADC core; requires star grounding with REF− and V−. |
| V− (Pin 12) | Negative Supply | Required for bipolar operation (−5V); tied to ground in unipolar +5V-only systems. |
| REF+ / REF− (Pins 13–14) | Reference Inputs | Define full-scale range; support external precision references; diode-clamped to V− and VCC for overvoltage protection. |
| CS (Pin 15) | Chip Select | Active-low enable for serial interface; includes deglitching circuit rejecting noise <1 ACLK cycle duration. |
| DOUT (Pin 16) | Serial Data Output | Three-state output delivering conversion result MSB-first or LSB-first per configuration; Hi-Z when CS high. |
| DIN (Pin 17) | Serial Data Input | Receives 8-bit command word synchronously with SCLK rising edge; latched after first 8 clocks. |
| SCLK (Pin 18) | Shift Clock | Controls bit timing for both DIN and DOUT; data captured on rising edge, transmitted on falling edge. |
| ACLK (Pin 19) | A/D Conversion Clock | Drives internal SAR and S/H timing; frequency ≥15kHz at 25°C, ≥125kHz at 85°C to maintain accuracy. |
| VCC (Pin 20) | Positive Supply | +5V nominal supply; bypassed with ≥1µF tantalum capacitor to AGND to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Select single-ended or differential per channel group via DIN command - eliminates external hardware reconfiguration. |
| Integrated sample-and-hold | On-chip S/H acquires and holds analog input during conversion - removes need for external hold capacitor or driver op-amp. |
| Variable output word length | Programmable 8/12/16-bit DOUT format - simplifies interface to 8-bit microcontrollers or 16-bit DSPs without bit-shifting overhead. |
| Power shutdown mode | Reduces ICC to ≤15µA by setting WL1=0/WL0=1 - extends battery life in intermittent-sampling applications. |
| Direct MPU interface | Native compatibility with MICROWIRE, SPI, and SCI protocols - eliminates level shifters or glue logic for COP402, MC68HC05, HD6301, etc. |
Applications
| Industrial Sensor Monitoring | Automated Test Equipment |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and strain gauge outputs across 8 sensor nodes in a PLC rack. IC Role / Device Role / Timing Role: Centralized 12-bit ADC with multiplexed analog front-end and serial output to host MCU over SPI. Use Value: Eliminates eight discrete ADCs and associated signal conditioning; reduces BOM cost and PCB area by >40% versus discrete solutions. | Use Scenario: Automated calibration of multimeter reference standards using programmable voltage sweeps. IC Role / Device Role / Timing Role: Precision digitizer capturing differential voltage errors between DUT and master reference under controlled ramp conditions. Use Value: 11-bit-plus-sign bipolar mode enables direct measurement of offset and gain errors with ±5V full-scale range matching calibrator outputs. |
| Medical Instrumentation | Energy Metering Front-End |
Use Scenario: ECG signal acquisition with lead-off detection using three differential electrode pairs plus common-mode reference. IC Role / Device Role / Timing Role: Multi-channel biopotential ADC with configurable COM-referenced inputs and low-leakage (<1µA) analog switches. Use Value: Built-in ±5V common-mode range accommodates electrode DC offsets without external level-shifting amplifiers. | Use Scenario: Voltage and current sampling in Class 0.5 polyphase electricity meters with anti-tampering diagnostics. IC Role / Device Role / Timing Role: Isolated analog input conditioner feeding isolated MCU via optocoupled serial link. Use Value: Guaranteed 12-bit no-missing-codes performance ensures compliance with IEC 62053-21 linearity requirements over 0°C–70°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200kSPS, SPI-only interface, no built-in S/H, requires external reference buffer. | Higher speed but lacks integrated sample-and-hold and differential MUX flexibility. | Prefer when throughput >50kSPS is required and external S/H is acceptable. |
| MAX120CPD | 12-bit, 100kSPS, parallel/serial interface, ±15V input tolerance, no software-configurable polarity. | Wider input voltage range but fixed unipolar-only operation and larger 28-pin PDIP package. | Prefer for legacy designs needing ±15V overvoltage robustness and parallel bus interface. |
Compared with ADS7822U and MAX120CPD, the LTC1290BCN#PBF uniquely combines integrated S/H, software-selectable unipolar/bipolar mode, and flexible 4-wire serial interface in a compact 20-pin PDIP - making it optimal for space-constrained, low-to-moderate speed industrial DAQ where configurability and analog integration reduce system complexity.
Availability
LTC1290BCN#PBF is available at Aetrix Electronics and suitable for industrial sensor monitoring, automated test equipment, medical instrumentation, and energy metering front-end applications requiring stable component supply and long-term manufacturability.
Supply support for LTC1290BCN#PBF 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC1290BCN#PBF belongs to ADI's legacy Linear Technology data acquisition product line, designed specifically for embedded systems requiring integrated, low-pin-count, serial-interface ADCs with flexible input configuration and minimal external components.
FAQ
What is the operating temperature range of the LTC1290BCN#PBF?
The LTC1290BCN#PBF is rated for 0°C to 70°C ambient operation (B-grade temperature specification). This range is validated across all electrical parameters including offset error (±1.5 LSB), linearity (±0.5 LSB INL), and conversion time (13µs max), ensuring reliable performance in commercial and industrial control environments without thermal derating.
Does the LTC1290BCN#PBF require an external reference voltage?
Yes, the LTC1290BCN#PBF requires an external reference applied between REF+ and REF− pins. It supports a 5V reference for full-scale ranges of 0V–5V (unipolar) or ±5V (bipolar). The device draws only 10–50µA reference current, enabling use with precision references like LT1027 or buffered DAC outputs without significant loading error.
How does the LTC1290BCN#PBF handle differential input configurations?
The LTC1290BCN#PBF supports four differential input pairs (CH0–CH1, CH2–CH3, CH4–CH5, CH6–CH7) selected via the 4-bit MUX address in the DIN command word. In differential mode, the device measures the voltage difference between designated + and − inputs while rejecting common-mode signals up to ±5V, with guaranteed 12-bit linearity and <1µA channel leakage.
Can the LTC1290BCN#PBF interface directly with an 8-bit microcontroller without level shifters?
Yes, the LTC1290BCN#PBF features CMOS-compatible digital I/O (VIH = 2.0V min, VOL = 0.4V max at 1.6mA) and operates from +5V VCC, enabling direct connection to 5V-tolerant 8-bit MCUs such as the ATmega328P or PIC16F877A. Its four-wire serial interface (CS, SCLK, DIN, DOUT) requires no level translation or additional drivers.
What is the purpose of the ACLK pin on the LTC1290BCN#PBF?
The ACLK pin on the LTC1290BCN#PBF provides the master clock for the internal successive approximation register and sample-and-hold circuitry. Unlike SCLK (which governs serial data transfer), ACLK directly controls conversion timing - with minimum recommended frequencies of 15kHz at 25°C and 125kHz at 85°C to maintain specified linearity and offset accuracy across temperature.
LTC1290BCN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V, ±5V
- Voltage - Supply, Digital:
- 5V, ±5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
LTC1290BCN#PBF FAQ
1.How can I place an order for LTC1290BCN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1290BCN#PBF 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 LTC1290BCN#PBF reliable?
The price and inventory of LTC1290BCN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1290BCN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1290BCN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1290BCN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1290BCN#PBF?
LTC1290BCN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1290BCN#PBF 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 LTC1290BCN#PBF?
For technical support, including LTC1290BCN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1290BCN#PBF requirements.
6.How does Aetrix verify that LTC1290BCN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1290BCN#PBF 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 LTC1290BCN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1290BCN#PBF?
All LTC1290BCN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1290BCN#PBF, 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 LTC1290BCN#PBF part is unused and in its original packaging.
Return procedure for LTC1290BCN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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