Datasheet

REV. A–2–
AD8304–SPECIFICATIONS
(V
P
= 5 V, V
N
= 0 V, T
A
= 25C, unless otherwise noted.)
Parameter Conditions Min
1
Typ Max
1
Unit
INPUT INTERFACE Pin 4, INPT; Pin 3 and Pin 5, VSUM
Specified Current Range Flows toward INPT Pin 100 pA
10 mA
Input Node Voltage Internally preset; may be altered 0.46 0.5 0.54 V
Temperature Drift –40°C < T
A
< +85°C 0.02 mV/°C
Input Guard Offset Voltage V
IN
– V
SUM
–20 +20 mV
PHOTODIODE BIAS
2
Established between Pin 6, V
PDB
, and Pin 4
Minimum Value I
PD
= 100 pA 70 100 mV
Transresistance 200 mV/mA
LOGARITHMIC OUTPUT Pin 8, VLOG
Slope Laser-trimmed at 25°C 196 200 204 mV/dec
0°C < T
A
< 70°C 194 207 mV/dec
Intercept Laser-trimmed at 25°C60100 140 pA
0°C < T
A
< 70°C35175 pA
Law Conformance Error 10 nA < I
PD
< 1 mA, Peak Error 0.05 0.25 dB
1 nA < I
PD
< 1 mA, Peak Error 0.1 0.7 dB
Maximum Output Voltage 1.6 V
Minimum Output Voltage Limited by V
N
= 0 V 0.1 V
Output Resistance Laser-trimmed at 25°C 4.95 5 5.05 kΩ
REFERENCE OUTPUT Pin 7, VREF
Voltage WRT Ground Laser-trimmed at 25°C 1.98 2 2.02 V
–40°C < T
A
< +85°C 1.92 2.08 V
Output Resistance 2 Ω
OUTPUT BUFFER Pin 9, BFIN; Pin 13, BFNG; Pin 11, VOUT
Input Offset Voltage –20 +20 mV
Input Bias Current Flowing out of Pin 9 or Pin 13 0.4 µA
Incremental Input Resistance 35 MΩ
Output Range R
L
= 1 kΩ to ground V
P
– 0.1 V
Output Resistance 0.5 Ω
Wide-Band Noise
3
I
PD
> 1 µA (see Typical Performance Characteristics) 1 µV/√Hz
Small Signal Bandwidth
3
I
PD
> 1 µA (see Typical Performance Characteristics) 10 MHz
Slew Rate 0.2 V to 4.8 V output swing 15 V/µs
POWER-DOWN INPUT Pin 2, PWDN
Logic Level, HI State –40°C < T
A
< +85°C, 2.7 V < V
P
< 5.5 V 2 V
Logic Level, LO State –40°C < T
A
< +85°C, 2.7 V < V
P
< 5.5 V 1 V
POWER SUPPLY Pin 10 and Pin 12, VPS1 and VPS2; Pin 1, VNEG
Positive Supply Voltage 3.0 5 5.5 V
Quiescent Current 4.5 5.3 mA
In Disabled State 60 µA
Negative Supply Voltage
4
|1V
P
–V
N
| < 8V 0 –5.5 V
NOTES
1
Minimum and maximum specified limits on parameters that are guaranteed but not tested are six sigma values.
2
This bias is internally arranged to track the input voltage at INPT; it is not specified relative to ground.
3
Output Noise and Incremental Bandwidth are functions of Input Current; see Typical Performance Characteristics.
4
Optional
Specifications subject to change without notice.