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Description
Demonstration circuit 2622A features the ADA4899-1
amplifier. The DC2622A includes two of these amplifiers
and is designed to drive the inputs of the DC2290 demo
board. The DC2290 features the
high speed SAR ADC. The linearity and low noise of the
ADA4899-1 make it an ideal candidate to drive the LTC2387
at frequencies above 1MHz. See Table 1.
The DC2622A is configured to accept a single-ended in-
put signal and provide unity gain. The board can provide
voltage gain if several component values are changed. For
FROM
SIGNAL SOURCE
FROM DC COMMON
MODE REFERENCE
Table 1. DC2290 (LTC2387 Family) Driver Boards
INPUT FREQUENCY
Up to 8kHz
Up to 1MHz
>1MHz
LTC
2387
18-bit, 15Msps
®
–5V
Figure 1. DC2622A Connection Diagram
DRIVER BOARD
DC2402
DC2403
Lowest Noise — DC2622
Lowest Distortion — DC2623
DEMO MANUAL DC2622A
Rail-to-Rail SAR ADC
Driver Amplifier
example, a voltage gain of two will result if the following
changes are made:
Change R23 to 309Ω
Install 309Ω at R27
Install 100pF at C28
Change R18 to 287Ω
Design files for this circuit board are available at
http://www.linear.com/demo/DC2622A
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog
Devices, Inc. All other trademarks are the property of their respective owners.
+10V
DC2622 F01
ADA4899-1
TO DC2290
AMPLIFIER
LT6237
LT6200
ADA4899-1
LTC6404-1 + AD8002
dc2622af
1
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Related Manuals for Linear Technology DC2622A
Summary of Contents for Linear Technology DC2622A
- Page 1 The board can provide L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog voltage gain if several component values are changed. For Devices, Inc. All other trademarks are the property of their respective owners.
- Page 2 DEMO MANUAL DC2622A Quick start proceDure Connect the DC2622A to a DC2290A using the two output DC voltage, preferably from E7 of the DC2290A, to 2.048V SMA connectors J1, J3. Connect the +10V and –5V DC in turret of the DC2622A.
- Page 3 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
- Page 4 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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