Datasheet LT1122 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Fast Settling, JFET Input Operational Amplifier |
| Pages / Page | 14 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. 12-Bit Voltage … |
| File Format / Size | PDF / 274 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. 12-Bit Voltage Output D/A Converter. Large-Scale Response
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LT1122 Fast Settling, JFET Input Operational Amplifier
FEATURES DESCRIPTION
n 100% Tested Settling Time 340ns Typ The LT®1122 JFET input operational amplifier combines to 1mV at Sum Node, 10V Step 540ns Max high speed and precision performance. Tested with Fixed Feedback Capacitor A unique poly-gate JFET process minimizes gate series n Slew Rate 60V/µs Min resistance and gate-to-drain capacitance, facilitating wide n Gain-Bandwidth Product 14MHz bandwidth performance, without degrading JFET transis- n Power Bandwidth (20VP-P) 1.2 MHz tor matching. n Unity-Gain Stable; Phase Margin 60° n Input Offset Voltage 600µV Max It slews at 80V/µs and settles in 340ns. The LT1122 is n Input Bias Current 25°C 75pA Max internally compensated to be unity-gain stable, yet it has 70°C 600pA Max a bandwidth of 14MHz at a supply current of only 7mA. Its ■ Input Offset Current 25°C 40pA Max speed makes the LT1122 an ideal choice for fast settling 70°C 150pA Max 12-bit data conversion and acquisition systems. ■ Low Distortion The LT1122 offset voltage of 120µV, and voltage gain of 500,000 also support the 12-bit accurate applications.
APPLICATIONS
The input bias current of 10pA and offset current of 4pA combined with its speed allow the LT1122 to be used in n Fast 12-Bit D/A Output Amplifiers such applications as high speed sample and hold ampli- n High Speed Buffers fiers, peak detectors, and integrators. n Fast Sample-and-Hold Amplifiers n High Speed Integrators L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load is a trademark of Linear Technology Corporation. All other trademarks are the property of their n Voltage to Frequency Converters respective owners. n Active Filters n Log Amplifiers n Peak Detectors
TYPICAL APPLICATION 12-Bit Voltage Output D/A Converter Large-Scale Response
+ CF 2 – 0mA TO 2mA 6 V LT1122 OUT 5V/DIV OR 4mA 0V TO 10V + 3 12-BIT CURRENT OUTPUT D/A CONVERTER C 1122 TA07 F = 5pF TO 17pF 200ns/DIV (DEPENDING ON D/A CONVERTER USED) LT1122•TA01 AV = –1 1122fb For more information www.linear.com/LT1122 1
FEATURES DESCRIPTION
n 100% Tested Settling Time 340ns Typ The LT®1122 JFET input operational amplifier combines to 1mV at Sum Node, 10V Step 540ns Max high speed and precision performance. Tested with Fixed Feedback Capacitor A unique poly-gate JFET process minimizes gate series n Slew Rate 60V/µs Min resistance and gate-to-drain capacitance, facilitating wide n Gain-Bandwidth Product 14MHz bandwidth performance, without degrading JFET transis- n Power Bandwidth (20VP-P) 1.2 MHz tor matching. n Unity-Gain Stable; Phase Margin 60° n Input Offset Voltage 600µV Max It slews at 80V/µs and settles in 340ns. The LT1122 is n Input Bias Current 25°C 75pA Max internally compensated to be unity-gain stable, yet it has 70°C 600pA Max a bandwidth of 14MHz at a supply current of only 7mA. Its ■ Input Offset Current 25°C 40pA Max speed makes the LT1122 an ideal choice for fast settling 70°C 150pA Max 12-bit data conversion and acquisition systems. ■ Low Distortion The LT1122 offset voltage of 120µV, and voltage gain of 500,000 also support the 12-bit accurate applications.
APPLICATIONS
The input bias current of 10pA and offset current of 4pA combined with its speed allow the LT1122 to be used in n Fast 12-Bit D/A Output Amplifiers such applications as high speed sample and hold ampli- n High Speed Buffers fiers, peak detectors, and integrators. n Fast Sample-and-Hold Amplifiers n High Speed Integrators L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and C-Load is a trademark of Linear Technology Corporation. All other trademarks are the property of their n Voltage to Frequency Converters respective owners. n Active Filters n Log Amplifiers n Peak Detectors
TYPICAL APPLICATION 12-Bit Voltage Output D/A Converter Large-Scale Response
+ CF 2 – 0mA TO 2mA 6 V LT1122 OUT 5V/DIV OR 4mA 0V TO 10V + 3 12-BIT CURRENT OUTPUT D/A CONVERTER C 1122 TA07 F = 5pF TO 17pF 200ns/DIV (DEPENDING ON D/A CONVERTER USED) LT1122•TA01 AV = –1 1122fb For more information www.linear.com/LT1122 1
