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Analog Devices Inc. LTC1288CS8#PBF
- Part No.:
- LTC1288CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1288CS8#PBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:283
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Product details
Overview
LTC1288CS8#PBF from Analog Devices (formerly Linear Technology) is a 12-bit successive approximation ADC with integrated 2-channel analog multiplexer, serial interface, and on-chip sample-and-hold. It operates from 2.7V to 6V, draws 210µA typical supply current at 6.6ksps, auto-shuts down to 1nA, and is housed in an 8-lead SOIC package. It is used in battery-operated remote data acquisition systems requiring low-power, isolated analog sensing.
For engineers reviewing the LTC1288CS8#PBF datasheet, LTC1288CS8#PBF pinout, LTC1288CS8#PBF application, or LTC1288CS8#PBF equivalent, this page delivers verified specifications, validated pin functions, confirmed multiplexer timing behavior, real-world power vs. sample rate trade-offs, and direct alternative part comparisons for precision micropower ADC selection.
Technical Context
The LTC1288CS8#PBF implements a switched-capacitor SAR architecture with a built-in sample-and-hold and software-configurable 2-channel MUX. Its reference input is internally tied to VCC/VREF (Pin 8), eliminating external reference components but fixing full-scale range to the supply voltage.
It uses a synchronous half-duplex 4-wire serial interface (CS/SHDN, CLK, DIN, DOUT) with start-bit–driven configuration. Conversion is initiated by a falling CS edge followed by a start bit on DIN; output data is LSB-first or MSB-first programmable via the MSBF bit, with null-bit–preceded 12-bit result transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit, no missing codes - guarantees monotonic transfer function and unambiguous digital representation of analog inputs. |
| Sampling Rate | 6.6ksps maximum - defines real-time throughput limit for continuous acquisition without data loss. |
| Supply Current | 210µA typical at 6.6ksps, 1nA typical in shutdown - enables multi-year operation on coin-cell batteries in intermittent-sampling applications. |
| DNL Error | ±0.25LSB typical, ±0.75LSB max - ensures integral linearity sufficient for precision measurement without calibration. |
| Input Configuration | Software-selectable 2-channel MUX supporting single-ended (CH0/GND, CH1/GND) or differential (CH0–CH1) modes - eliminates need for external signal routing switches. |
| Reference Architecture | VCC/VREF pin (Pin 8) serves as both supply and reference - simplifies BOM but ties full-scale range directly to supply voltage stability. |
| Serial Interface | 4-wire, half-duplex, SPI/Microwire-compatible - allows direct connection to microcontrollers with minimal GPIO usage; DIN/DOUT can be wired together for 3-wire operation. |
Pinout & Package
Package: 8-lead plastic SOIC (SO-8), 150°C max junction temperature, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS/SHDN | Chip Select / Shutdown Control | Active-low enable; logic high places device in ultra-low-power shutdown (1nA), independent of clock activity. |
| 2 - CH0 | Analog Input Channel 0 | Positive input terminal for single-ended or differential mode; high-impedance (>2700MΩ when CS = VIH) minimizes loading on sensors. |
| 3 - CH1 | Analog Input Channel 1 | Second analog input; used as negative input in differential mode or as second single-ended channel. |
| 4 - GND | Analog Ground Reference | Must connect directly to analog ground plane; separates noise-sensitive analog circuitry from digital return paths. |
| 5 - DIN | Digital Input (MUX Address) | Receives 3-bit configuration word (SGL/DIFF, ODD/SIGN, MSBF) after start bit; enables flexible input mode selection per conversion. |
| 6 - DOUT | Digital Output (Conversion Result) | Transmits 12-bit result LSB-first or MSB-first; tri-states when CS high; supports bidirectional wiring with DIN for 3-wire interface. |
| 7 - CLK | Serial Clock Input | Synchronizes all data transfers; falling edge clocks data out, rising edge captures DIN; max 120kHz at 2.7V. |
| 8 - VCC/VREF | Power Supply & Reference Voltage | Single pin supplies power and sets full-scale range (VFS = VCC); bypassing with 10µF tantalum to GND is mandatory for accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown to 1nA | Eliminates need for external power gating circuitry; reduces system standby power to negligible levels between conversions. |
| On-chip sample-and-hold | Removes requirement for external S/H amplifier; supports accurate sampling of high-impedance sources up to 10kΩ source resistance. |
| Configurable 2-channel MUX | Enables dual-sensor monitoring (e.g., temperature + voltage) or differential measurements (e.g., bridge outputs) without external multiplexers. |
| 3-wire serial option (DIN/DOUT tied) | Reduces MCU GPIO count and PCB trace count in space-constrained designs while maintaining full functionality. |
| Guaranteed ±0.75LSB DNL | Ensures monotonicity and predictable code transitions across full temperature range (0°C to 70°C), critical for closed-loop control. |
Applications
| Battery Monitoring | Remote Sensor Node |
|---|---|
|
Use Scenario: Measuring cell voltage and pack current in portable medical devices using coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: ADC digitizes analog signals from shunt resistor and voltage divider; MUX alternates between channels per conversion cycle. Use Value: 210µA active current and 1nA shutdown extend battery life beyond 5 years in sleep-wake duty cycles; SO-8 footprint fits compact PCB layouts. |
Use Scenario: Wireless environmental sensor node logging temperature, humidity, and light intensity in agricultural IoT deployments. IC Role / Device Role / Timing Role: Interfaces with multiple analog sensors via CH0/CH1; serial output streams data to low-power MCU before RF transmission. Use Value: Micropower operation enables solar/battery hybrid power; VCC-referenced design avoids extra voltage reference IC, reducing BOM cost and board area. |
| Isolated Data Acquisition | Pen Digitizer Interface |
|
Use Scenario: High-voltage industrial motor controller acquiring feedback signals across opto-isolators or digital isolators. IC Role / Device Role / Timing Role: ADC resides on isolated side; serial interface transmits digitized current/voltage data across barrier with minimal pin count. Use Value: 4-wire (or 3-wire) isolation-friendly interface reduces isolator channel count; low supply current minimizes isolated-side power dissipation. |
Use Scenario: Resistive touch screen controller in handheld diagnostic instruments requiring precise pen-tip position detection. IC Role / Device Role / Timing Role: Samples X/Y electrode voltages sequentially using MUX; fast 100µs conversion time supports >100Hz digitization rates. Use Value: Differential mode rejects common-mode noise from display drivers; 12-bit resolution enables sub-millimeter positional accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit micropower ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, 3.3V-only supply, internal reference, SPI interface, 8-pin SOIC | Higher speed and fixed 2.5V reference simplify ratiometric sensor use but increase power (1.2mA active) | Select when higher throughput and stable reference are prioritized over battery life; not suitable for 2.7–6V wide-supply systems. |
| MAX11131AUT+T | 12-bit, 100ksps, 2.7–3.6V supply, internal reference, SPI, 6-pin SOT23 | Smaller package and integrated reference reduce size/BOM but lack MUX and operate only up to 3.6V | Select for ultra-compact, single-channel designs where supply is tightly regulated near 3.3V and MUX is unnecessary. |
Compared with ADS7822U and MAX11131AUT+T, the LTC1288CS8#PBF uniquely balances ultra-low 210µA active current, 2.7–6V supply flexibility, and integrated 2-channel MUX-making it optimal for long-life, multi-sensor, wide-input-voltage embedded systems where external reference omission is acceptable.
Availability
LTC1288CS8#PBF is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition, and isolated sensor interfaces requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC1288CS8#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. (including legacy Linear Technology products) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, industrial automation, and power management.
The LTC1288CS8#PBF belongs to the LTC® micropower ADC family, designed specifically for energy-constrained applications demanding high resolution, low quiescent current, and simple integration-especially in portable, remote, or isolated measurement systems.
FAQ
What is the maximum sampling rate of the LTC1288CS8#PBF?
The LTC1288CS8#PBF achieves a maximum sampling rate of 6.6ksps under standard conditions (VCC = 2.7V, fCLK = 120kHz). This rate is determined by its 141.5µs total cycle time and internal conversion timing. Reducing clock frequency or increasing VCC permits lower sampling rates but does not increase the maximum achievable rate beyond 6.6ksps.
Does the LTC1288CS8#PBF require an external voltage reference?
No, the LTC1288CS8#PBF does not require an external voltage reference. Its Pin 8 (VCC/VREF) serves as both power supply and reference input, setting full-scale range equal to the applied supply voltage. This eliminates external reference components but requires tight supply regulation for measurement accuracy.
Can the LTC1288CS8#PBF operate from a 5V supply?
Yes, the LTC1288CS8#PBF supports supply voltages from 2.7V to 6V, including 5V operation. At 5V, the full-scale input range becomes 0V to 5V, and clock frequency may be increased beyond 120kHz (see max clock vs. VCC curve). Digital input thresholds scale with VCC, so 5V-tolerant MCU I/O is compatible.
How does the LTC1288CS8#PBF achieve 1nA shutdown current?
The LTC1288CS8#PBF achieves 1nA typical shutdown current when CS/SHDN (Pin 1) is driven high to VCC. In this state, internal bias circuits and comparator are fully disabled, reference input becomes high-impedance, and digital logic is gated off-rendering clock and DIN activity irrelevant to supply current.
Is the LTC1288CS8#PBF pin-compatible with the LTC1285CS8#PBF?
No, the LTC1288CS8#PBF is not pin-compatible with the LTC1285CS8#PBF. While both use SO-8 packages, their pinouts differ: LTC1288CS8#PBF assigns Pins 2/3 to CH0/CH1 and Pin 5 to DIN, whereas LTC1285CS8#PBF uses Pins 2/3 for +IN/–IN and has no DIN pin. Board layout must be redesigned for substitution.
LTC1288CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 6.6k
- Number of Inputs:
- 2
- Input Type:
- 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:
- 2.7V ~ 6V
- Voltage - Supply, Digital:
- 2.7V ~ 6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1288CS8#PBF FAQ
1.How can I place an order for LTC1288CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1288CS8#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 LTC1288CS8#PBF reliable?
The price and inventory of LTC1288CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1288CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1288CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1288CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1288CS8#PBF?
LTC1288CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1288CS8#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 LTC1288CS8#PBF?
For technical support, including LTC1288CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1288CS8#PBF requirements.
6.How does Aetrix verify that LTC1288CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1288CS8#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 LTC1288CS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1288CS8#PBF?
All LTC1288CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1288CS8#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 LTC1288CS8#PBF part is unused and in its original packaging.
Return procedure for LTC1288CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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