LTC1069-1 - Low Power, 8th Order Progressive Elliptic, Lowpass Filter
Datasheet 
DocumentationDatasheet
Design Note
Reliability Data
cad_symbol
Features
- 8th Order Elliptic Filter in SO-8 Package
- Operates from Single 3.3V to ±5V Power Supplies
- –20dB at 1.2fCUTOFF
- –52dB at 1.4fCUTOFF
- –70dB at 2fCUTOFF
- Wide Dynamic Range
- 110μVRMS Wideband Noise
- 3.8mA Supply Current with ±5V Supplies
- 2.5mA Supply Current with Single 5V Supply
- 2mA Supply Current with Single 3.3V Supply
Typical Application
Description
The LTC®1069-1 is a monolithic 8th order lowpass filter featuring clock-tunable cutoff frequency and 2.5mA power supply current with a single 5V supply. An additional feature of the LTC1069-1 is operation with a single 3.3V supply.The cutoff frequency (fCUTOFF) of the LTC1069-1 is equal to the clock frequency divided by 100. The gain at fCUTOFFM is –0.7dB and the typical passband ripple is ±0.15dB up to 0.9fCUTOFF. The stopband attenuation of the LTC1069-1 features a progressive elliptic response reaching 20dB attenuation at 1.2fCUTOFF, 52dB attenuation at 1.4fCUTOFF and 70dB attenuation at 2fCUTOFF.
With ±5V supplies, the LTC1069-1 cutoff frequency can be clock-tuned up to 12kHz; with a single 5V supply, the maximum cutoff frequency is 8kHz.
The low power feature of the LTC1069-1 does not penalize the device’s dynamic range. With ±5V supplies and an input range of 0.3VRMS to 2.5VRMS, the signal-to-(noise + THD) ratio is ≥70dB. The wideband noise of the LTC1069-1 is 110μVRMS. Other filter responses with lower power or higher speed can be obtained. Please contact LTC marketing for details.
The LTC1069-1 is available in 8-pin PDIP and 8-pin SO packages.
N-8,SO-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC1069-1CN8#PBF | PDIP | 8 | C | $5.20 | $4.70 |
| LTC1069-1CS8#PBF | SO | 8 | C | $5.35 | $4.80 |
| LTC1069-1CS8#TRPBF | SO | 8 | C | $4.86 | |
| LTC1069-1IN8#PBF | PDIP | 8 | I | $5.70 | $5.15 |
| LTC1069-1IS8#PBF | SO | 8 | I | $5.85 | $5.25 |
| LTC1069-1IS8#TRPBF | SO | 8 | I | $5.31 | |
| LTC1069-6CS8#PBF | SO | 8 | C | $6.25 | $4.80 |
| LTC1069-6CS8#TRPBF | SO | 8 | C | $4.86 | |
| LTC1069-6IS8#PBF | SO | 8 | I | $6.85 | $5.25 |
| LTC1069-6IS8#TRPBF | SO | 8 | I | $5.31 | |
| LTC1069-7CS8#PBF | SO | 8 | C | $5.75 | $4.80 |
| LTC1069-7CS8#TRPBF | SO | 8 | C | $4.86 | |
| LTC1069-7IS8#PBF | SO | 8 | I | $6.30 | $5.20 |
| LTC1069-7IS8#TRPBF | SO | 8 | I | $5.26 | |
| LTC1069-1CN8 | PDIP | 8 | C | $10.40 | $9.40 |
| LTC1069-1CS8 | SO | 8 | C | $10.70 | $9.60 |
| LTC1069-1CS8#TR | SO | 8 | C | $9.72 | |
| LTC1069-1IN8 | PDIP | 8 | I | $11.40 | $10.30 |
| LTC1069-1IS8 | SO | 8 | I | $11.70 | $10.50 |
| LTC1069-1IS8#TR | SO | 8 | I | $10.62 | |
| LTC1069-6CS8 | SO | 8 | C | $12.50 | $9.60 |
| LTC1069-6CS8#TR | SO | 8 | C | $9.72 | |
| LTC1069-6IS8 | SO | 8 | I | $13.70 | $10.50 |
| LTC1069-6IS8#TR | SO | 8 | I | $10.62 | |
| LTC1069-7CS8 | SO | 8 | C | $11.50 | $9.60 |
| LTC1069-7CS8#TR | SO | 8 | C | $9.72 | |
| LTC1069-7IS8 | SO | 8 | I | $12.60 | $10.40 |
| LTC1069-7IS8#TR | SO | 8 | I | $10.52 |
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.