DocumentationDatasheet
Reliability Data
Product Selector Card
LT Journal
Press Release
cad_symbol
Features
- Fully Differential Input and Output
- Wide Supply Range: 2.375V to 12.6V
- Rail-to-Rail Output Swing
- Low Noise: 3nV/√Hz
- Low Distortion, 2VP-P, 1MHz: –94dBc
- Adjustable Output Common Mode Voltage
- Unity Gain Stable
- Gain-Bandwidth: 70MHz
- Slew Rate: 65V/μs
- Large Output Current: 85mA
- DC Voltage Offset <2mV MAX
- Open-Loop Gain: 100V/mV
- Low Power Shutdown
- 8-Pin MSOP or 3mm × 3mm DFN Package
Typical Application
Description
The LT1994 is a high precision, very low noise, low distortion, fully differential input/output amplifier optimized for 3V, single supply operation. The LT1994’s output common mode voltage is independent of the input common mode voltage, and is adjustable by applying a voltage on the VOCM pin. A separate internal common mode feedback path provides accurate output phase balancing and reduced even-order harmonics. This makes the LT1994 ideal for level shifting ground referenced signals for driving differential input, single supply ADCs.
The LT1994 output can swing rail-to-rail and is capable of sourcing and sinking up to 85mA. In addition to the low distortion characteristics, the LT1994 has a low input referred voltage noise of 3nV/√Hz. This part maintains its performance for supply voltages as low as 2.375V. It draws only 13.3mA of supply current and has a hardware shutdown feature that reduces current consumption to 225μA.
The LT1994 is available in an 8-pin MSOP or 8-pin DFN package.
3x3 DFN-8,MS-8
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LT1994CDD#PBF | DFN | 8 | C | $2.35 | $1.65 |
| LT1994CDD#TRPBF | DFN | 8 | C | $1.71 | |
| LT1994CMS8#PBF | MSOP | 8 | C | $2.35 | $1.65 |
| LT1994CMS8#TRPBF | MSOP | 8 | C | $1.71 | |
| LT1994HDD#PBF | DFN | 8 | H | $2.70 | $1.90 |
| LT1994HDD#TRPBF | DFN | 8 | H | $1.96 | |
| LT1994IDD#PBF | DFN | 8 | I | $2.70 | $1.90 |
| LT1994IDD#TRPBF | DFN | 8 | I | $1.96 | |
| LT1994IMS8#PBF | MSOP | 8 | I | $2.70 | $1.90 |
| LT1994IMS8#TRPBF | MSOP | 8 | I | $1.96 | |
| LT1994MPDD#PBF | DFN | 8 | MP | $6.75 | $4.84 |
| LT1994MPDD#TRPBF | DFN | 8 | MP | $4.90 | |
| LT1994CMS8 | MSOP | 8 | C | $4.70 | $3.30 |
| LT1994CMS8#TR | MSOP | 8 | C | $3.42 | |
| LT1994IMS8 | MSOP | 8 | I | $5.40 | $3.80 |
| LT1994IMS8#TR | MSOP | 8 | I | $3.92 | |
| LT1994CDD | DFN | 8 | C | $4.70 | $3.30 |
| LT1994CDD#TR | DFN | 8 | C | $3.42 | |
| LT1994IDD | DFN | 8 | I | $5.40 | $3.80 |
| LT1994IDD#TR | DFN | 8 | I | $3.92 | |
| LT1994HDD | DFN | 8 | H | $5.40 | $3.80 |
| LT1994HDD#TR | DFN | 8 | H | $3.92 |
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 |
|---|---|---|---|
| DC1058A-A | Combo Demoboard for LTC2203 and LT1994, req. DC718 | $200.00 | |
| DC961A | LT1994 70MHz Fully Differential Amplifier/Driver | $50.00 |
Companion Boards
| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC718C | USB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps) | $300.00 |