DocumentationDatasheet
Design Note
Reliability Data
Product Selector Card
Software and Simulation
cad_symbol
Features
- Sample Rate: 80Msps
- Single 3V Supply (2.7V to 3.4V)
- Low Power: 222mW
- 73dB SNR at 70MHz Input
- 90dB SFDR at 70MHz Input
- No Missing Codes
- Flexible Input: 1VP-P to 2VP-P Range
- 575MHz Full Power Bandwidth S/H
- Clock Duty Cycle Stabilizer
- Shutdown and Nap Modes
- Pin Compatible Family
125Msps: LTC2253 (12-Bit), LTC2255 (14-Bit)
105Msps: LTC2252 (12-Bit), LTC2254 (14-Bit)
80Msps: LTC2229 (12-Bit), LTC2249 (14-Bit)
65Msps: LTC2228 (12-Bit), LTC2248 (14-Bit)
40Msps: LTC2227 (12-Bit), LTC2247 (14-Bit)
25Msps: LTC2226 (12-Bit), LTC2246 (14-Bit)
10Msps: LTC2225 (12-Bit), LTC2245 (14-Bit) - 32-Pin (5mm × 5mm) QFN Package
Typical Application
Description
The LTC2249 is a 14-bit 80Msps, low power 3V A/D converter designed for digitizing high frequency, wide dynamic range signals. The LTC2249 is perfect for demanding imaging and communications applications with AC performance that includes 73dB SNR and 90dB SFDR for signals well beyond the Nyquist frequency.
DC specs include ±1LSB INL (typ), ±0.5LSB DNL (typ) and no missing codes over temperature. The transition noise is a low 1.2LSBRMS.
A single 3V supply allows low power operation. A separate output supply allows the outputs to drive 0.5V to 3.6V logic.
A single-ended CLK input controls converter operation. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles.
5x5 QFN-32
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC2249CUH#PBF | QFN | 32 | C | $34.58 | $25.00 |
| LTC2249CUH#TRPBF | QFN | 32 | C | $25.10 | |
| LTC2249IUH#PBF | QFN | 32 | I | $41.50 | $30.00 |
| LTC2249IUH#TRPBF | QFN | 32 | I | $30.10 | |
| LTC2249CUH | QFN | 32 | C | $69.16 | $50.00 |
| LTC2249IUH | QFN | 32 | I | $83.00 | $60.00 |
| LTC2249CUH#TR | QFN | 32 | C | $50.20 | |
| LTC2249IUH#TR | QFN | 32 | I | $60.20 |
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 |
|---|---|---|---|
| DC1057A | LT6411 driver and LTC2249 ADC combo board, Requires DC718 | $200.00 | |
| DC782A-A | LTC2249IUH | High Speed ADC, VDD = +3.0V, 80Msps, 14-Bit 1MHz < Ain < 70MHz, req DC718 | $200.00 | |
| DC782A-Q | LTC2249IUH | High Speed ADC, VDD = +3.0V, 80Msps, 14-Bit 70MHz < Ain < 170MHz, req DC718 | $200.00 | |
| DC900A-01E | Combo Demoboard for LTC2249 and LT1993-2 (6dB) Req DC718 | Contact Factory |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC718C | USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) | $300.00 |