Datasheet LT6604-2.5 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | Dual Very Low Noise, Differential Amplifier and 2.5MHz Lowpass Filter |
| Pages / Page | 16 / 8 — PIN FUNCTIONS. +OUTA, – OUTA (Pins 27, 29):. VMIDA (Pin 34):. Exposed Pad … |
| File Format / Size | PDF / 206 Kb |
| Document Language | English |
PIN FUNCTIONS. +OUTA, – OUTA (Pins 27, 29):. VMIDA (Pin 34):. Exposed Pad (Pin 35):. BLOCK DIAGRAM
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Text Version of Document
LT6604-2.5
PIN FUNCTIONS +OUTA, – OUTA (Pins 27, 29):
Output Pins. Pins 27 and ground. A ground plane should be used. A poor ground 29 are the fi lter differential outputs for channel A. With a will increase noise and distortion. Pin 34 sets the output typical short-circuit current greater than ±40mA, each pin common mode voltage of the 1st stage of the fi lter in chan- can drive a 100Ω and/or 50pF load to AC ground. nel A. It has a 5.5kΩ impedance, and it can be overridden with an external low impedance voltage source.
VMIDA (Pin 34):
The VMIDA pin is internally biased at mid- supply, see Block Diagram. For single supply operation
Exposed Pad (Pin 35):
V–. The Exposed Pad must be the VMIDA pin should be bypassed with a quality 0.01μF soldered to the PCB. If V– is separate from ground, tie ceramic capacitor to V–. For dual supply operation, Pin the Exposed Pad to V–. 34 can be bypassed or connected to a high quality DC
BLOCK DIAGRAM
V– NC V– VMIDA V+A NC NC 11k +INA V + LOWPASS IN A –OUTA RIN 1580Ω FILTER STAGE 11k 800Ω V– NC NC OP AMP 800Ω + – + – V V OCM OCM –INA V – IN A – + – + +OUTA RIN 800Ω NC NC 800Ω 1580Ω VOCMA V+A V+B V– V– 11k LOWPASS VMIDB 1580Ω FILTER STAGE NC 11k 800Ω NC V– NC OP AMP +INB 800Ω V + IN B + – + –OUTB – RIN V V OCM OCM + NC – – + NC 800Ω –INB V – +OUTB IN B RIN 800Ω 1580Ω NC NC 660025 BD VOCMB NC NC V+B 660425fa 8
PIN FUNCTIONS +OUTA, – OUTA (Pins 27, 29):
Output Pins. Pins 27 and ground. A ground plane should be used. A poor ground 29 are the fi lter differential outputs for channel A. With a will increase noise and distortion. Pin 34 sets the output typical short-circuit current greater than ±40mA, each pin common mode voltage of the 1st stage of the fi lter in chan- can drive a 100Ω and/or 50pF load to AC ground. nel A. It has a 5.5kΩ impedance, and it can be overridden with an external low impedance voltage source.
VMIDA (Pin 34):
The VMIDA pin is internally biased at mid- supply, see Block Diagram. For single supply operation
Exposed Pad (Pin 35):
V–. The Exposed Pad must be the VMIDA pin should be bypassed with a quality 0.01μF soldered to the PCB. If V– is separate from ground, tie ceramic capacitor to V–. For dual supply operation, Pin the Exposed Pad to V–. 34 can be bypassed or connected to a high quality DC
BLOCK DIAGRAM
V– NC V– VMIDA V+A NC NC 11k +INA V + LOWPASS IN A –OUTA RIN 1580Ω FILTER STAGE 11k 800Ω V– NC NC OP AMP 800Ω + – + – V V OCM OCM –INA V – IN A – + – + +OUTA RIN 800Ω NC NC 800Ω 1580Ω VOCMA V+A V+B V– V– 11k LOWPASS VMIDB 1580Ω FILTER STAGE NC 11k 800Ω NC V– NC OP AMP +INB 800Ω V + IN B + – + –OUTB – RIN V V OCM OCM + NC – – + NC 800Ω –INB V – +OUTB IN B RIN 800Ω 1580Ω NC NC 660025 BD VOCMB NC NC V+B 660425fa 8
