AD8305ACP-REEL7(2003) Ver la hoja de datos (PDF) - Analog Devices
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AD8305ACP-REEL7 Datasheet PDF : 20 Pages
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AD8305–SPECIFICATIONS (VP = 5 V, VN = 0 V, TA = 25؇C, RREF = 200 k⍀, and VRDZ connected to VREF, unless
otherwise noted.)
Parameter
Conditions
Min
Typ Max
INPUT INTERFACE
Specified Current Range, IPD
Input Current Min/Max Limits
Reference Current, IREF, Range
Summing Node Voltage
Temperature Drift
Input Offset Voltage
LOGARITHMIC OUTPUT
Logarithmic Slope
Logarithmic Intercept1
Law Conformance Error
Wideband Noise2
Small Signal Bandwidth2
Maximum Output Voltage
Minimum Output Voltage
Output Resistance
Pin 4, INPT, Pin 3, IREF
Flows toward INPT Pin
Flows toward INPT Pin
Flows toward IREF Pin
Internally Preset; May be Altered by User
–40∞C < TA < +85∞C
VINPT – VSUM, VIREF – VSUM
Pin 9, VLOG
–40∞C < TA < +85∞C
–40∞C < TA < +85∞C
10 nA < IPD < 1 mA
IPD > 1 mA
IPD > 1 mA
Limited by VN = 0 V
10 n
10 n
0.46
–20
190
185
0.3
0.1
4.375
0.5
0.015
1m
10 m
1m
0.54
+20
200 210
215
1
1.7
2.5
0.1 0.4
0.7
0.7
1.7
0.01
5
5.625
REFERENCE OUTPUT
Voltage wrt Ground
Maximum Output Current
Incremental Output Resistance
Pin 2, VREF
–40∞C < TA < +85∞C
Sourcing (Grounded Load)
Load Current < 10 mA
2.435
2.4
2.5 2.565
2.6
20
2
OUTPUT BUFFER
Pin 10, BFIN; Pin 11, SCAL; Pin 12, VOUT
Input Offset Voltage
–20
Input Bias Current
Flowing out of Pin 10 or 11
Incremental Input Resistance
Output Range
Incremental Output Resistance
RL = 1 kW to ground
Load Current < 10 mA
Peak Source/Sink Current
Small Signal Bandwidth
GAIN = 1
Slew Rate
0.2 V to 4.8 V Output Swing
+20
0.4
35
VP – 0.1
0.5
25
15
15
POWER SUPPLY
Positive Supply Voltage
Quiescent Current
Negative Supply Voltage (Optional)
Pin 8, VPOS; Pin 6 and Pin 7, VNEG
(VP – VN) £ 12 V
(VP – VN) £ 12 V
3
5
12
5.4 6.5
–5.5
0
NOTES
1Other values of logarithmic intercept can be achieved by adjusting R REF.
2Output noise and incremental bandwidth are functions of input current, measured using output buffer connected for GAIN = 1.
Unit
A
A
A
V
mV/∞C
mV
mV/dec
mV/dec
nA
nA
dB
mV÷Hz
MHz
V
V
kW
V
V
mA
W
mV
mA
MW
V
W
mA
MHz
V/ms
V
mA
V
–2–
REV. A
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