AD8304 Analog Devices, AD8304 Datasheet - Page 2

• Manufacturer Part Number: AD8304
• Description: 160 DB Logarithmic Amplifier With Photo-diode Interface
• Manufacturer: Analog Devices

AD8304–SPECIFICATIONS
Parameters
INPUT INTERFACE
PHOTODIODE BIAS
LOGARITHMIC OUTPUT
REFERENCE OUTPUT
OUTPUT BUFFER
POWER DOWN INPUT
POWER SUPPLY
NOTES
1
2
3
Specifications subject to change without notice.
This bias is internally arranged to track the input voltage at INPT; it is not specified relative to ground.
Output Noise and Incremental Bandwidth are functions of Input Current: see Typical Performance Characteristics.
Optional
Specified Current Range
Input Node Voltage
Temperature Drift
Input Guard Offset Voltage
Minimum Value
Transresistance
Slope
Intercept
Law Conformance Error
Maximum Output Voltage
Minimum Output Voltage
Output Resistance
Voltage WRT Ground
Output Resistance
Input Offset Voltage
Input Bias Current
Incremental Input Resistance
Output Range
Output Resistance
Wideband Noise
Small Signal Bandwidth
Slew Rate
Logic Level, HI State
Logic Level, LO State
Positive Supply Voltage
Quiescent Current
In Disabled State
Negative Supply Voltage
2
1
2
3
Conditions
Pin 4, INPT; Pin 3 and Pin 5, VSUM
Flows toward INPT pin
Internally preset; May Be Altered
–40°C < T
V
Established between Pin 6, V
I
Pin 8, VLOG
Laser-Trimmed at 25°C
0°C < T
Laser-Trimmed at 25°C
0°C < T
10 nA < I
1 nA < I
Limited by V
Laser-Trimmed at 25°C
Pin 7, VREF
Laser-Trimmed at 25°C
–40°C < T
Pin 9, BFIN; Pin 13, BFNG; Pin 11, VOUT
Flowing out of Pin 9 or Pin 13
R
I
I
0.2 V to 4.8 V output swing
Pin 2, PWDN
–40°C < T
–40°C < T
Pin 10 and Pin 12, VPS1 and VPS2; Pin 1, VNEG
PD
PD
PD
IN
L
= 1 kΩ to ground
= 100 pA
> 1 µA (see Typical Performance Characteristics)
> 1 µA (see Typical Performance Characteristics)
– V
SUM
A
A
PD
PD
< 70°C
< 70°C
A
A
A
A
< 1 mA, Peak Error
< +85°C
< +85°C
< +85°C, 2.7 V < V
< +85°C, 2.7 V < V
< 1 mA, Peak Error
N
= 0 V
(V
P
= 5 V, V
N
= 0 V, T
PDB
, and Pin 4
P
P
< 5.5V
< 5.5V
A
= 25 C, unless otherwise noted.)
Min
–20
70
196
194
60
35
4.95
1.98
1.92
–20
2
100
0.46
3.0
Typ
0.5
0.02
100
200
200
100
0.05
0.1
1.6
0.1
5
2
2
0.4
35
V
0.5
1
10
15
5
4.5
60
0
P
– 0.1
Max
10
0.54
+20
204
207
140
175
0.25
0.7
5.05
2.02
2.08
+20
1
5.5
5.3
–5.5
Unit
pA
mA
V
mV/°C
mV
mV
mV/mA
mV/dec
mV/dec
pA
pA
dB
dB
V
V
kΩ
V
V
Ω
mV
µA
MΩ
V
Ω
µV/√Hz
MHz
V/µs
V
V
V
mA
µA
V