AD8606ARZ-REEL7 Analog Devices Inc, AD8606ARZ-REEL7 Datasheet - Page 18

• Manufacturer Part Number: AD8606ARZ-REEL7
• Description: IC,Operational Amplifier,DUAL,CMOS,SOP,8PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: DigiTrim®r

Specifications of AD8606ARZ-REEL7

• Amplifier Type: General Purpose
• Number Of Circuits: 2
• Output Type: Rail-to-Rail
• Slew Rate: 5 V/µs
• Gain Bandwidth Product: 10MHz
• Current - Input Bias: 0.2pA
• Voltage - Input Offset: 80µV
• Current - Supply: 1mA
• Current - Output / Channel: 80mA
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• -3db Bandwidth: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD8605/AD8606/AD8608
I-V CONVERSION APPLICATIONS
PHOTODIODE PREAMPLIFIER APPLICATIONS
The low offset voltage and input current of the AD8605 make
it an excellent choice for photodiode applications. In addition,
the low voltage and current noise make the amplifier ideal for
application circuits with high sensitivity.
The input bias current of the amplifier contributes an error
term that is proportional to the value of R
The offset voltage causes a dark current induced by the shunt
resistance of the Diode R
the output of the amplifier. The error voltage is written as
Typically, R
E
R
O
D
PHOTODIODE
=
Figure 51. Equivalent Circuit for Photodiode Preamp
V
F
OS
is smaller than R
I
D
⎛
⎜
⎜
⎝
1
+
R
R
50pF
C
D
D
F
⎞
⎟
⎟
⎠
+
D
. These error terms are combined at
R
F
I
D
B
, thus R
V
OS
F
/R
V1
500mV
V2
500mV
AD8605
1µF
C1
1µF
D
C2
F
10MΩ
.
10pF
can be ignored.
R
C
F
F
Figure 52. Single-Supply Headphone/Speaker Amplifier
20kΩ
20kΩ
20kΩ
20kΩ
R1
R2
R7
R8
V
OUT
Rev. J | Page 18 of 24
3
2
5
6
1/2
AD8606
1/2
AD8606
4
4
8
8
5V
5V
At room temperature, the AD8605 has an input bias current of
0.2 pA and an offset voltage of 100 μV. Typical values of R
in the range of 1 GΩ.
For the circuit shown in Figure 51, the output error voltage is
approximately 100 μV at room temperature, increasing to about
1 mV at 85°C.
The maximum achievable signal bandwidth is
where f
AUDIO AND PDA APPLICATIONS
The low distortion and wide dynamic range of the AD860x
make it a great choice for audio and PDA applications,
including microphone amplification and line output buffering.
Figure 52 shows a typical application circuit for headphone/
line-out amplification.
R1 and R2 are used to bias the input voltage at half the supply,
which maximizes the signal bandwidth range. C1 and C2 are
used to ac couple the input signal. C1, R1, and R2 form a high-
pass filter whose corner frequency is 1/[2π(R1||R2)C1].
The high output current of the AD8606 allows it to drive heavy
resistive loads.
The circuit in Figure 52 is tested to drive a 16 Ω headphone. The
THD + N is maintained at approximately −60 dB throughout the
audio range.
1
7
f
MAX
100µF
t
100µF
is the unity gain frequency of the amplifier.
C4
C3
=
R3
1kΩ
R5
1kΩ
2
20Ω
20Ω
R6
R4
π
HEADPHONES
R
f
F
t
C
F
D
are