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Analog Devices Inc. LTC1867ACGN#TRPBF
- Part No.:
- LTC1867ACGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1867ACGN#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,946
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Product details
Overview
LTC1867ACGN#TRPBF from Analog Devices is a 16-bit, 8-channel, 200ksps successive approximation ADC with integrated 2.5V reference, SPI/MICROWIRE interface, and configurable single-ended/differential input multiplexer. It delivers ±2LSB max INL, 89dB SNR (with internal reference), and operates from a single 5V supply at 1.3mA typical current. Used in industrial process control and high-speed data acquisition systems requiring precision, low power, and compact packaging.
For engineers reviewing the LTC1867ACGN#TRPBF datasheet, LTC1867ACGN#TRPBF pinout, LTC1867ACGN#TRPBF application, or LTC1867ACGN#TRPBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance over temperature, automatic nap/sleep modes for battery-sensitive designs, unipolar/bipolar conversion flexibility, and compatibility with space-constrained layouts using its 16-pin narrow SSOP package.
Technical Context
The LTC1867ACGN#TRPBF implements a capacitive SAR architecture with differential 16-bit DAC, low-power comparator, and on-chip sample-and-hold. Its analog input multiplexer supports eight channels with programmable configuration via 7-bit serial command - enabling combinations of single-ended (vs GND) or differential (CH0–CH1, CH2–CH3, etc.) inputs, plus unipolar (0–4.096V) or bipolar (±2.048V) conversion modes.
Digital control uses CS/CONV to initiate conversion and frame serial transfers; SCK synchronizes 16-bit output (straight binary or two's complement) on SDO while SDI accepts configuration words. Internal reference includes factory-trimmed 2.5V bandgap (VREF) and buffered 4.096V output (REFCOMP), both requiring specific bypassing (2.2µF + 0.1µF and 10µF + 0.1µF respectively) for specified noise and stability performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees monotonic transfer function and no missing codes across full operating temperature range (0°C to 70°C). |
| Sample Rate | 200ksps - maximum throughput supported with guaranteed 3.5µs max conversion time and 1.5µs min acquisition time. |
| INL | ±2LSB max - ensures end-point linearity error remains within ±0.003% of full scale, critical for calibration-sensitive measurement systems. |
| SNR | 89dB typical - measured at 1kHz input with internal reference, enabling >14.5 effective number of bits (ENOB) in noise-limited applications. |
| Supply Current | 1.3mA at 200ksps - enables low-power operation in portable or thermally constrained systems without external clock or reference buffering. |
| Analog Input Range | 0–4.096V (unipolar) or ±2.048V (bipolar) - matches standard industrial sensor outputs and allows direct interfacing with 4–20mA loop receivers via appropriate scaling. |
| Reference | Internal 2.5V ±15ppm/°C tempco - eliminates need for external reference IC unless higher accuracy or lower drift is required. |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN), 0.150" body width, 0.025" lead pitch. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog input channels / common terminal | Configurable as eight single-ended inputs or four differential pairs; CH7/COM serves as dedicated channel or shared negative reference depending on COM bit setting. |
| REFCOMP (Pin 9) | Reference buffer output | Provides 4.096V buffered reference; must be bypassed with 10µF + 0.1µF to GND for stable operation and optimal noise performance. |
| VREF (Pin 10) | 2.5V reference output/input | Factory-trimmed internal bandgap reference; can be overdriven by external source for improved accuracy or drift performance. |
| CS/CONV (Pin 11) | Conversion start / serial frame enable | Rising edge initiates conversion; low state enables serial port and determines timing window for data readout and configuration loading. |
| SCK (Pin 12) | Serial clock input | Synchronizes 16-bit data transfer; supports up to 40MHz clock frequency for fast readout and minimal bus occupancy. |
| SDO (Pin 13) | Serial data output | Outputs conversion result in straight binary (unipolar) or two's complement (bipolar); tri-state when CS/CONV high. |
| SDI (Pin 14) | Serial data input | Accepts 7-bit configuration word defining channel, polarity, mode, and sleep control prior to each conversion. |
| GND (Pin 15) | Analog and digital ground | Single ground plane connection required; separation from noisy digital traces essential to maintain 89dB SNR performance. |
| VDD (Pin 16) | Power supply | Single 4.75–5.25V supply powers analog and digital sections; requires 10µF + 0.1µF bypassing close to pin for low-noise operation. |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit no missing codes over temperature | Guarantees monotonicity and full code coverage from –40°C to 85°C, eliminating interpolation errors in closed-loop control systems. |
| Configurable 8-channel MUX | Supports mixed single-ended and differential acquisitions in one device, reducing BOM count and PCB area versus discrete channel solutions. |
| Automatic nap mode between conversions | Reduces average current to ~150µA during idle periods, extending battery life in portable DAQ without software intervention. |
| On-chip 2.5V reference with 4.096V buffer | Enables precise unipolar full-scale range (4.096V = 212 × 1mV) and bipolar range (±2.048V), simplifying sensor signal conditioning design. |
| SPI/MICROWIRE-compatible serial interface | Uses industry-standard 3-wire protocol with CS/CONV framing, minimizing GPIO usage and enabling direct connection to microcontrollers without level-shifting. |
Applications
| Industrial Process Monitoring | Portable Data Logger |
|---|---|
Use Scenario: Continuous voltage/current monitoring of pressure, temperature, and flow sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Primary 16-bit digitizer for multi-sensor analog front-end, performing synchronized sampling across 8 channels at ≤200ksps. Use Value: ±2LSB INL and 89dB SNR ensure <0.01% measurement uncertainty over 0–70°C, meeting SIL-2 functional safety requirements for field instrumentation. |
Use Scenario: Battery-powered environmental sensor node logging temperature, humidity, and air quality metrics over extended periods. IC Role / Device Role / Timing Role: Low-power ADC managing wake-up triggered sampling cycles, leveraging nap/sleep modes to extend 2xAA battery life beyond 12 months. Use Value: 1.3mA active current and 0.2µA sleep current minimize energy draw per sample, while internal reference eliminates need for external precision voltage source. |
| Automotive Diagnostic Interface | Medical Sensor Signal Conditioning |
Use Scenario: On-board diagnostics unit capturing analog signals from engine knock, oxygen, and throttle position sensors during vehicle testing. IC Role / Device Role / Timing Role: High-fidelity analog capture element supporting AEC-Q100 Grade 3 qualification (–40°C to 85°C) in under-hood environments. Use Value: Channel-to-channel isolation >117dB at 100kHz prevents crosstalk between ignition noise and sensitive sensor inputs, preserving diagnostic accuracy. |
Use Scenario: Patient monitor acquiring ECG, respiration, and blood oxygen waveforms with clinical-grade fidelity. IC Role / Device Role / Timing Role: Precision front-end ADC handling differential biopotential inputs with programmable gain and bipolar range support. Use Value: Differential linearity ≤±1.75LSB and transition noise ≤0.74LSBRMS ensure clean waveform reconstruction without harmonic distortion artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 16-bit, 500ksps, internal 4.096V reference, SPI interface, 16-pin TSSOP; higher speed but higher power (4.5mA at full rate). | Requires faster MCU interface and thermal management; better suited for real-time control loops than battery-operated loggers. | Select when throughput >200ksps is mandatory and system power budget allows ≥3× higher active current. |
| MAX11100ETK+ | 16-bit, 250ksps, internal 2.5V reference, SPI interface, 16-pin TQFN; lower INL (±1.5LSB) but no nap mode, only 0°C to 70°C grade. | Lacks automatic low-power states and automotive temperature range; limited to commercial-grade instrumentation. | Choose for cost-sensitive benchtop equipment where continuous sampling dominates and sleep functionality is unnecessary. |
Compared with ADS8688IPWR and MAX11100ETK+, the LTC1867ACGN#TRPBF provides superior power efficiency at 200ksps with automatic nap mode, broader temperature support (0°C to 70°C vs commercial-only), and tighter INL guarantee - making it optimal for portable, industrial, and automotive applications demanding precision and low quiescent current.
Availability
LTC1867ACGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, portable data acquisition, and automotive diagnostic systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC1867ACGN#TRPBF 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, serving industrial, automotive, communications, and healthcare markets.
The LTC1867ACGN#TRPBF belongs to the LTC® precision data acquisition family, designed specifically for applications demanding high resolution, low power, and robust operation in electrically noisy or thermally variable environments.
FAQ
What is the operating temperature range for the LTC1867ACGN#TRPBF?
The LTC1867ACGN#TRPBF is rated for 0°C to 70°C ambient operation. This "C-grade" specification distinguishes it from the "I-grade" LTC1867IGN#TRPBF (–40°C to 85°C) and automotive variants. All DC and dynamic specifications - including ±2LSB INL, 89dB SNR, and 200ksps throughput - are guaranteed across this full range.
Does the LTC1867ACGN#TRPBF require an external reference?
No, the LTC1867ACGN#TRPBF includes a factory-trimmed 2.5V internal reference with ±15ppm/°C tempco and buffered 4.096V output (REFCOMP). External reference is optional - used only when higher accuracy (<±0.1%), lower drift (<5ppm/°C), or custom full-scale voltage is needed. VREF pin supports overdrive for such cases.
How does the automatic nap mode reduce power consumption in the LTC1867ACGN#TRPBF?
The LTC1867ACGN#TRPBF enters automatic nap mode when CS/CONV remains high after conversion completion. In this state, analog circuitry (except VREF and REFCOMP) powers down, reducing supply current from 1.3mA to ~150µA. Power scales inversely with sample rate - e.g., at 10ksps, average current drops to ~150µA, extending battery life significantly in intermittent-sampling applications.
Can the LTC1867ACGN#TRPBF perform differential measurements between arbitrary channel pairs?
Yes - the LTC1867ACGN#TRPBF's 8-channel MUX supports differential configurations between CH0–CH1, CH2–CH3, CH4–CH5, and CH6–CH7, plus flexible use of CH7/COM as common-mode reference for any channel. Configuration is controlled via 7-bit serial command (SD, OS, S1, S0, COM, UNI, SLP bits), allowing real-time reconfiguration without hardware changes.
What bypass capacitors are required for stable operation of the LTC1867ACGN#TRPBF?
The LTC1867ACGN#TRPBF requires three critical bypass networks: (1) 10µF tantalum + 0.1µF ceramic on VDD (Pin 16), (2) 2.2µF tantalum + 0.1µF ceramic on VREF (Pin 10), and (3) 10µF tantalum + 0.1µF ceramic on REFCOMP (Pin 9). These values are specified in the datasheet to ensure <100µV p-p noise, stable reference settling, and immunity to digital switching transients.
LTC1867ACGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 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, Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1867ACGN#TRPBF FAQ
1.How can I place an order for LTC1867ACGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1867ACGN#TRPBF 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 LTC1867ACGN#TRPBF reliable?
The price and inventory of LTC1867ACGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1867ACGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1867ACGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1867ACGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1867ACGN#TRPBF?
LTC1867ACGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1867ACGN#TRPBF 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 LTC1867ACGN#TRPBF?
For technical support, including LTC1867ACGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1867ACGN#TRPBF requirements.
6.How does Aetrix verify that LTC1867ACGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1867ACGN#TRPBF 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 LTC1867ACGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1867ACGN#TRPBF?
All LTC1867ACGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1867ACGN#TRPBF, 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 LTC1867ACGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1867ACGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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