The LT3040 from Analog Devices, is a high performance, robust Voltage Output Reference/DAC buffer that employs a unique architecture that seeks to maintain the precision and accuracy of the Reference or DAC while sourcing up to 200mA. It features ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive, high accuracy systems. Designed as an advanced voltage buffer for Voltage Output References/DACs, the LT3040 features extremely low 1/f noise, very low wideband noise, excellent PSRR over a wide frequency range and low dropout performance – a typical 350mV dropout at 200mA of source current.
Operating quiescent current is nominally 2.5mA and drops to <1μA in shutdown. The LT3040’s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation independent of the VIN voltage. Additionally, the buffer features programmable current limit, fast start capability and a FAULT flag to indicate faults on the output.
The LT3040 is stable with a minimum 4.7μF ceramic output capacitor. Built-in protection includes reverse supply voltage protection, reverse current protection, internal current limit with fold-back and thermal limit with hysteresis. The LT3040 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm × 3mm DFN packages.
Key Features and Benefits
- Excellent wide-band noise filtering, ideal for post-regulating high speed switching supplies
- Retains the noise performance of front-end high-precision reference
- More headroom and higher efficiency
Applications
- Instrumentation: High precision voltage references or very low noise instrument
- General Purpose: Powering or buffering high speed/high precision data converters
Block Diagrams and Tables
Related Evaluation Board
Product Technical Specifications
EU RoHS
Compliant
ECCN (US)
EAR99
Part Status
Active
HTS
8542.39.00.90
Automotive
No
PPAP
No
Type
LDO
Number of Outputs
1
Polarity
Positive
Accuracy (%)
±1(Typ)
Output Type
Adjustable
Output Voltage (V)
0 to 15
Maximum Output Current (A)
0.2
Minimum Input Voltage (V)
1.8
Maximum Input Voltage (V)
20
Maximum Dropout Voltage @ Current (V)
0.065@1mA|0.22@50mA|0.315@100mA|0.52@200mA
Line Regulation
3uV/V
Load Regulation
0.5mV
Typical Ground Current @ Full Load (mA)
8
Junction to Ambient
28°C/W
Junction to Case
6°C/W
Special Features
Current Limit|Thermal Shutdown Protection
Minimum Operating Temperature (°C)
-40
Maximum Operating Temperature (°C)
125
Supplier Temperature Grade
Extended
Packaging
Tube
Mounting
Surface Mount
Package Height
0.86
Package Width
3
Package Length
4.04
PCB changed
12
Standard Package Name
SO
Supplier Package
MSOP EP
Pin Count
12
Lead Shape
Gull-wing