LTC2351-14 - 6 Channel, 14-Bit, 1.5Msps Simultaneous Sampling ADC with Shutdown
Features
- 1.5Msps ADC with Six Simultaneously Sampled Differential Inputs
- 250ksps Throughput per Channel
- 75dB SINAD
- Low Power Dissipation: 16.5mW
- 3V Single Supply Operation
- 2.5V Internal Bandgap Reference, Can be Overdriven with External Reference
- 3-Wire SPI-Compatible Serial Interface
- Internal Conversion Triggered by CONV
- SLEEP (12µW) Shutdown Mode
- NAP (4.5mW) Shutdown Mode
- 0V to 2.5V Unipolar, or ±1.25V Bipolar Differential Input Range
- 83dB Common Mode Rejection
- Tiny 32-Pin (5mm × 5mm) QFN Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LTC2351-14 is a 14-bit, 1.5Msps ADC with six simultaneously sampled differential inputs. The device draws only 5.5mA from a single 3V supply, and comes in a tiny 32-pin (5mm × 5mm) QFN package. A SLEEP shutdown mode further reduces power consumption to 12µW. The combination of low power and tiny package makes the LTC2351-14 suitable for portable applications.
The LTC2351-14 contains six separate differential inputs that are sampled simultaneously on the rising edge of the CONV signal. These six sampled inputs are then converted at a rate of 250ksps per channel.
The 83dB common mode rejection allows users to eliminate ground loops and common mode noise by measuring signals differentially from the source.
The device converts 0V to 2.5V unipolar inputs differentially, or ±1.25V bipolar inputs also differentially, depending on the state of the BIP pin. Any analog input may swing rail-to-rail as long as the differential input range is maintained.
The conversion sequence can be abbreviated to convert fewer than six channels, depending on the logic state of the SEL2, SEL1 and SEL0 inputs.
The serial interface sends out the six conversion results in 96 clocks for compatibility with standard serial interfaces.
| Bits |
|
| LTC2351-12 | 12 |
| LTC2351-14 | 14 |
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC2351CUH-14#PBF | 5x5 QFN-32 | UH | C | 05-08-1693 | Yes |
| LTC2351CUH-14#TRPBF | 5x5 QFN-32 | UH | C | 05-08-1693 | Yes |
| LTC2351HUH-14#PBF | 5x5 QFN-32 | UH | H | 05-08-1693 | Yes |
| LTC2351HUH-14#TRPBF | 5x5 QFN-32 | UH | H | 05-08-1693 | Yes |
| LTC2351IUH-14#PBF | 5x5 QFN-32 | UH | I | 05-08-1693 | Yes |
| LTC2351IUH-14#TRPBF | 5x5 QFN-32 | UH | I | 05-08-1693 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2351CUH-14#PBF | 5x5 QFN-32 | C | $13.84 | $9.45 | Yes | |
| LTC2351CUH-14#TRPBF | 5x5 QFN-32 | C | $9.51 | Yes | ||
| LTC2351HUH-14#PBF | 5x5 QFN-32 | H | $17.81 | $12.47 | Yes | |
| LTC2351HUH-14#TRPBF | 5x5 QFN-32 | H | $12.53 | Yes | ||
| LTC2351IUH-14#PBF | 5x5 QFN-32 | I | $16.61 | $11.34 | Yes | |
| LTC2351IUH-14#TRPBF | 5x5 QFN-32 | I | $11.40 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1278A | LTC2351-14: 14-bit, 6-ch 1.5Msps Simultaneous Sampling SAR ADC (req DC890) | $150.00 | |
| Buy Now | |||
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC890B | USB Data Acquisition Controller, for PScope Evaluation Kits (up to 250Mbps, CMOS/LVDS) | $300.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC2351HUH-14#PBF | 5x5 QFN-32 | H | $17.81 | $12.47 | Yes | |
| LTC2351HUH-14#TRPBF | 5x5 QFN-32 | H | $12.53 | Yes | ||
| LTC2351IUH-14#PBF | 5x5 QFN-32 | I | $16.61 | $11.34 | Yes | |
| LTC2351IUH-14#TRPBF | 5x5 QFN-32 | I | $11.40 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Multiphase Power Measurement
- Multiphase Motor Control
- Data Acquisition Systems
- Uninterruptable Power Supplies
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Design Tools
LinearLabTools
LinearLabTools is a collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards. An evaluation board for a data converter will typically plug into an accompanying controller board, which is then connected to a host computer running a Linear supplied GUI program such as PScope for Analog-to-Digital converters or LTDACgen for Digital-to-Analog converters. The GUI allows basic performance measurements to be made, but it is not designed to run arbitrary sequences of tests or communicate with other hardware, as is often required by customers when evaluating a part for their own application. LinearLabTools allows customers to control Linear’s data converter demo boards as they would any other piece of test equipment, using their own software.
The LinearLabTools package also contains various application examples, simulations, and educational programs that demonstrate mixed signal concepts.
Click here for more information and to download the software
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
