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Analog Devices Inc. LTC1290BIN#PBF
- Part No.:
- LTC1290BIN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
LTC1290BIN#PBF.pdf
- Description:
- IC DAS/ADC 12BIT 50K 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,741
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Product details
Overview
LTC1290BIN#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 8-channel sampling data acquisition system IC integrating successive approximation ADC, analog multiplexer, on-chip sample-and-hold, and full-duplex serial interface. It supports unipolar (0V–5V) or bipolar (±5V) input ranges, 50kHz max throughput, and operates from single 5V or dual ±5V supplies. Used in industrial sensor monitoring systems requiring multi-channel precision analog-to-digital conversion with microprocessor serial control.
For engineers reviewing the LTC1290BIN#PBF datasheet, LTC1290BIN#PBF pinout, LTC1290BIN#PBF application, or LTC1290BIN#PBF equivalent, key selection considerations include its software-programmable unipolar/bipolar mode, differential or single-ended channel configuration, MSB/LSB-first data format, 12-bit resolution with ±0.5 LSB INL, and compatibility with MICROWIRE/SPI-style serial ports.
Technical Context
The LTC1290BIN#PBF implements a 12-bit capacitive DAC-based successive approximation register (SAR) architecture with integrated analog multiplexer and sample-and-hold. Its serial interface uses independent ACLK (for conversion timing) and SCLK (for data transfer), enabling precise synchronization between sampling and digital communication.
It supports four differential or eight single-ended inputs via software-configurable MUX address bits, with built-in deglitching on CS to reject noise-induced spurious conversions. Power shutdown mode reduces supply current to ≤15 µA when ACLK is disabled, making it suitable for low-duty-cycle data logging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit unipolar or 11-bit + sign bipolar - delivers 4096 distinct codes over 0V–5V or ±5V full-scale range. |
| Throughput Rate | 50 kHz maximum - enables 20 µs minimum cycle time for real-time multi-channel sampling. |
| INL Error | ±0.5 LSB (typical) - ensures monotonicity and <0.012% full-scale linearity error at 5V reference. |
| Conversion Time | 13 µs max over temperature - guarantees deterministic latency for time-critical control loops. |
| Supply Current | 6.0 mA typical active, ≤15 µA in power shutdown - supports battery-powered or energy-conscious designs. |
| Analog Input Range | Single-ended: 0V to 5V or ±5V; differential: ±5V common-mode - accommodates grounded and floating sensor signals. |
| Serial Interface | Four-wire, full-duplex, MSB/LSB-first programmable - directly interfaces to COP402, MC68HC05C4, TMS70xx without glue logic. |
Pinout & Package
Package: 20-lead PDIP (N package), through-hole, 0.3″ wide body, RoHS-compliant #PBF finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Eight configurable analog inputs; each can be used in single-ended (vs COM) or differential (pairwise) mode. |
| COM (Pin 9) | Single-Ended Reference | Zero-reference node for all single-ended measurements; must be low-noise and tied to analog ground plane. |
| DGND (Pin 10) | Digital Ground | Return path for internal logic; separate from AGND to minimize 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 Rail | Supports bipolar operation down to –6V; tied to ground in single-supply 5V configurations. |
| REF+ / REF– (Pins 13–14) | Reference Voltage Inputs | Accept external 5V reference; internal diodes clamp inputs to (V– –0.3V) and (VCC + 0.3V) for overvoltage protection. |
| CS (Pin 15) | Chip Select | Active-low enable for serial communication; includes two-ACLK-cycle deglitching to suppress noise-induced false triggers. |
| DOUT (Pin 16) | Serial Data Output | Three-state output delivering conversion result; transitions from Hi-Z to valid data after ten (130–200 ns). |
| DIN (Pin 17) | Serial Data Input | Receives 8-bit configuration word (MUX address, UNI, MSBF, WL1/WL0) on rising SCLK edges. |
| SCLK (Pin 18) | Shift Clock | Synchronizes serial data transfer; data latched on rising edge, output shifted on falling edge (full-duplex). |
| ACLK (Pin 19) | A/D Conversion Clock | Independent clock governing SAR conversion timing; min 15 kHz @ 25°C, ≥125 kHz @ 85°C recommended. |
| VCC (Pin 20) | Positive Supply | 4.5V to 5.25V operation; requires local 1µF tantalum + 0.1µF ceramic bypass to AGND for stable reference. |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable unipolar/bipolar mode | Single bit (UNI) configures full-scale range: 0V–5V (unipolar) or ±5V (bipolar) with automatic 2's complement coding. |
| Configurable input topology | Four differential pairs or eight single-ended channels via 4-bit MUX address; supports mixed configurations per conversion. |
| Programmable data word length | 8-, 12-, or 16-bit output words selected by WL1/WL0 bits - matches native word size of host MCU without post-processing. |
| On-chip sample-and-hold | Integrated S/H with 7 SCLK-cycle acquisition time - eliminates external hold capacitor and simplifies anti-alias filtering. |
| Low-power shutdown mode | Power-down activated by WL1=0/WL0=1; reduces ICC to ≤15 µA while preserving configuration state for fast wake-up. |
| Direct MPU serial port compatibility | Native support for MICROWIRE (COP402), SPI (MC68HC05C4), and SCI (HD6301) protocols - no level shifters or protocol translators needed. |
Applications
| Industrial Sensor Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Continuous acquisition from 8 thermocouple, RTD, or strain gauge channels in PLC I/O modules. IC Role / Device Role / Timing Role: Central data acquisition IC performing synchronized sampling, digitization, and serial reporting to host controller. Use Value: Eliminates need for external multiplexer, S/H, and interface logic - reduces BOM count and layout area by >40%. |
Use Scenario: Multi-point voltage/current measurement during functional testing of PCBAs with programmable test sequences. IC Role / Device Role / Timing Role: Precision ADC subsystem triggered by test controller via CS/SCLK, delivering calibrated 12-bit results per channel. Use Value: Software-configurable MUX and bipolar mode enable single hardware platform to validate both power rail and signal integrity tests. |
| Portable Data Loggers | Motor Control Feedback Systems |
|
Use Scenario: Battery-powered environmental logger capturing temperature, humidity, and pressure at 10 Hz intervals over 72 hours. IC Role / Device Role / Timing Role: Low-power ADC managing duty-cycled sampling, with shutdown mode reducing average current to <50 µA. Use Value: 15 µA shutdown current extends battery life beyond 3 months using two AA cells - verified per TPC12/TCP13 curves. |
Use Scenario: Real-time phase current sensing in 3-phase inverter drives using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: High-speed acquisition of three differential current channels with <13 µs conversion time for closed-loop PWM timing. Use Value: 50 kHz throughput supports 16.7 kHz PWM carrier sampling - meets IEC 61800-3 Class A EMC requirements. |
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, 200 kSPS, SPI-only interface, no built-in S/H, requires external reference buffer. | Higher speed but lacks differential MUX flexibility and on-chip S/H - needs additional op-amps and layout area. | Choose ADS7822U only if >100 kSPS throughput is required and board space allows external support components. |
| MAX195BCPP | 16-bit, 100 kSPS, parallel/serial interface, ±5V supply only, no software-configurable input topology. | Higher resolution but fixed 8-channel single-ended topology - cannot perform differential measurements without external instrumentation amps. | Select MAX195BCPP when absolute precision >12-bit is mandatory and system design permits fixed-input architecture. |
Compared with ADS7822U and MAX195BCPP, the LTC1290BIN#PBF uniquely integrates MUX, S/H, and flexible serial interface in one PDIP package - reducing component count, layout complexity, and qualification effort for medium-speed, multi-topology industrial DAQ.
Availability
LTC1290BIN#PBF is available at Aetrix Electronics and suitable for industrial sensor monitoring, automated test equipment, portable data loggers, and motor control feedback systems requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC1290BIN#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) acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for legacy Linear parts including the LTC1290 series.
The LTC1290BIN#PBF belongs to Linear's precision data acquisition IC family, designed specifically for embedded systems needing integrated analog front-end functionality with minimal external components and direct microprocessor serial interfacing.
FAQ
What is the operating temperature range for the LTC1290BIN#PBF?
The LTC1290BIN#PBF is rated for –40°C to +85°C (industrial grade), confirmed by the "I" suffix in the part number and specified in the Absolute Maximum Ratings table. This range is validated across all DC and AC parameters including offset error, INL, and conversion time - ensuring reliable performance in harsh environments like factory floors or outdoor enclosures.
Does the LTC1290BIN#PBF require an external reference voltage?
Yes, the LTC1290BIN#PBF requires an external reference applied to REF+ and REF– pins. It does not contain an internal reference. A stable 5V source (e.g., LT1027) is recommended, as reference voltage directly scales full-scale range and affects LSB size - for example, 5V reference yields 1.22 mV/LSB in unipolar mode. The device draws only 10–50 µA reference current.
Can the LTC1290BIN#PBF perform simultaneous sampling across all 8 channels?
No, the LTC1290BIN#PBF performs sequential sampling using a single ADC core and analog multiplexer. It acquires one channel per conversion cycle (min 20 µs). True simultaneous sampling would require eight independent ADCs - a capability not supported by the LTC1290BIN#PBF architecture or datasheet specifications.
How is the power shutdown mode activated on the LTC1290BIN#PBF?
Power shutdown is activated by setting WL1 = 0 and WL0 = 1 in the 8-bit DIN configuration word. This reduces supply current to ≤15 µA. Note that the previous conversion result is output as a 10-bit word, so a "dummy" conversion cycle is required before shutdown takes effect. Conversion resumes automatically on next CS assertion.
Is the LTC1290BIN#PBF pin-compatible with other LTC1290 variants like LTC1290BISW?
No, the LTC1290BIN#PBF (20-lead PDIP) is not pin-compatible with LTC1290BISW (20-lead SO Wide). While both share identical pin functions and ordering, the SO Wide package has different lead pitch (0.025″ vs 0.1″), body width (0.3″ vs 0.295″), and thermal characteristics (θJA = 130°C/W vs 100°C/W). PCB layout must be redesigned for package interchange.
LTC1290BIN#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
LTC1290BIN#PBF FAQ
1.How can I place an order for LTC1290BIN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1290BIN#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 LTC1290BIN#PBF reliable?
The price and inventory of LTC1290BIN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1290BIN#PBF is usually 5 days.
3.What payment methods are accepted for LTC1290BIN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1290BIN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1290BIN#PBF?
LTC1290BIN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1290BIN#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 LTC1290BIN#PBF?
For technical support, including LTC1290BIN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1290BIN#PBF requirements.
6.How does Aetrix verify that LTC1290BIN#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1290BIN#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 LTC1290BIN#PBF meets industry standards.
7.What is the process for return or replacement of LTC1290BIN#PBF?
All LTC1290BIN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1290BIN#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 LTC1290BIN#PBF part is unused and in its original packaging.
Return procedure for LTC1290BIN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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