DocumentationDatasheet
Reliability Data
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Features
- Single Supply 3.3V or ±3.3V Operation
- Software Programmable Features Unipolar/Bipolar Conversions 4 Differential/8 Single-Ended Inputs Variable Data Word Length Power
- Built-In Sample-and-Hold
- Direct 4-Wire Interface to Most MPU Serial Ports and all MPU Parallel Ports
- 25kHz Maximum Throughput Rate
- Available in 20-Lead PDIP and 20-Lead SW Packages
Typical Application
Description
The LTC1289 is a 3V data acquisition component which contains a serial I/O successive approximation A/D converter. The device specifications are guaranteed at a supply voltage of 2.7V. It uses LTCMOS™ switched capacitor technology to perform a 12-bit unipolar, or 11-bit plus sign bipolar A/D conversion. The 8 channel input multiplexer can be configured for either single-ended or differential inputs (or combinations thereof). An on-chip sample and hold is included for all single-ended input channels. When the LTC1289 is idle it can be powered down in applications where low power consumption is desired.
The serial I/O is designed to be compatible with industry standard full duplex serial interfaces. It allows either MSB- or LSB- first data and automatically provides 2’s complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors.
N-20,SW-20
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1289BCN#PBF | PDIP | 20 | C | $28.75 | $22.70 |
| LTC1289BCSW#PBF | SO | 20 | C | $34.50 | $27.25 |
| LTC1289BCSW#TRPBF | SO | 20 | C | $27.35 | |
| LTC1289CCN#PBF | PDIP | 20 | C | $23.00 | $18.15 |
| LTC1289CCSW#PBF | SO | 20 | C | $27.60 | $21.80 |
| LTC1289CCSW#TRPBF | SO | 20 | C | $21.90 | |
| LTC1289BCN | PDIP | 20 | C | $57.50 | $45.40 |
| LTC1289BCSW | SO | 20 | C | $69.00 | $54.50 |
| LTC1289BCSW#TR | SO | 20 | C | $54.70 | |
| LTC1289CCN | PDIP | 20 | C | $46.00 | $36.30 |
| LTC1289CCSW | SO | 20 | C | $55.20 | $43.60 |
| LTC1289CCSW#TR | SO | 20 | C | $43.80 |
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.