DocumentationDatasheet
Design Note
Reliability Data
LT Journal
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Features
- 14 Levels of Programmable Gain
- 125dB CMRR Independent of Gain
- Gain Accuracy 0.1% (Typ)
- Maximum Offset Voltage of 10µV
- Maximum Offset Voltage Drift: 50nV/°C
- Rail-to-Rail Input and Output
- Parallel or Serial (SPI) Interface for Gain Setting
- Supply Operation: 2.7V to ±5.5V
- Typical Noise: 2.5µVP-P (0.01Hz to 10Hz)
- 16-Lead SSOP and 12-Lead DFN Packages
Typical Application
Description
The LTC6915 is a precision programmable gain instrumentation amplifier. The gain can be programmed to 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 through a parallel or serial interface. The CMRR is typically 125dB with a single 5V supply with any programmed gain. The offset is below 10µV with a temperature drift of less than 50nV/°C.
The LTC6915 uses charge balanced sampled data techniques to convert a differential input voltage into a single ended signal that is in turn amplified by a zero-drift operational amplifier.
The differential inputs operate from rail-to-rail and the single-ended output swings from rail-to-rail. The LTC6915 can be used in single power supply applications as low as 2.7V, or with dual ±5V supplies. The LTC6915 is available in a 16-lead SSOP package and a 12-lead DFN surface mount package.
4x3 DFN-12,SSOP-16
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC6915CDE#PBF | DFN | 12 | C | $3.69 | $2.44 |
| LTC6915CDE#TRPBF | DFN | 12 | C | $2.50 | |
| LTC6915CGN#PBF | SSOP | 16 | C | $3.69 | $2.44 |
| LTC6915CGN#TRPBF | SSOP | 16 | C | $2.50 | |
| LTC6915HGN#PBF | SSOP | 16 | H | $4.37 | $2.89 |
| LTC6915HGN#TRPBF | SSOP | 16 | H | $2.95 | |
| LTC6915IDE#PBF | DFN | 12 | I | $4.07 | $2.69 |
| LTC6915IDE#TRPBF | DFN | 12 | I | $2.75 | |
| LTC6915IGN#PBF | SSOP | 16 | I | $4.07 | $2.69 |
| LTC6915IGN#TRPBF | SSOP | 16 | I | $2.75 | |
| LTC6915CGN | SSOP | 16 | C | $7.38 | $4.88 |
| LTC6915CGN#TR | SSOP | 16 | C | $5.00 | |
| LTC6915IGN#TR | SSOP | 16 | I | $5.50 | |
| LTC6915IGN | SSOP | 16 | I | $8.14 | $5.38 |
| LTC6915HGN | SSOP | 16 | H | $8.74 | $5.78 |
| LTC6915HGN#TR | SSOP | 16 | H | $5.90 | |
| LTC6915CDE | DFN | 12 | C | $7.38 | $4.88 |
| LTC6915CDE#TR | DFN | 12 | C | $5.00 | |
| LTC6915IDE | DFN | 12 | I | $8.14 | $5.38 |
| LTC6915IDE#TR | DFN | 12 | I | $5.50 |
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.