Datasheet
© 2008 Microchip Technology Inc. DS21811E-page 3
MCP6281/1R/2/3/4/5
AC ELECTRICAL SPECIFICATIONS
MCP6283/MCP6285 CHIP SELECT (CS) SPECIFICATIONS
FIGURE 1-1: Timing Diagram for the Chip
Select (CS)
pin on the MCP6283 and MCP6285.
Electrical Characteristics: Unless otherwise indicated, T
A
= +25°C, V
DD
= +2.2V to +5.5V, V
SS
= GND, V
OUT
≈ V
DD
/2,
V
CM
= V
DD
/2, V
L
= V
DD
/2, R
L
= 10 kΩ to V
L
, C
L
= 60 pF and CS is tied low. (refer to Figure 1-2 and Figure 1-3).
Parameters Sym Min Typ Max Units Conditions
AC Response
Gain Bandwidth Product GBWP — 5.0 — MHz
Phase Margin at Unity-Gain PM — 65 — ° G = +1 V/V
Slew Rate SR — 2.5 — V/µs
Noise
Input Noise Voltage E
ni
—5.2— µV
P-P
f = 0.1 Hz to 10 Hz
Input Noise Voltage Density e
ni
—16—nV/√Hz f = 1 kHz
Input Noise Current Density i
ni
—3—fA/√Hz f = 1 kHz
Electrical Characteristics: Unless otherwise indicated, T
A
= +25°C, V
DD
= +2.2V to +5.5V, V
SS
= GND, V
OUT
≈ V
DD
/2,
V
CM
= V
DD
/2, V
L
= V
DD
/2, R
L
= 10 kΩ to V
L
, C
L
= 60 pF and CS is tied low. (refer to Figure 1-2 and Figure 1-3).
Parameters Sym Min Typ Max Units Conditions
CS
Low Specifications
CS
Logic Threshold, Low V
IL
V
SS
—0.2V
DD
V
CS
Input Current, Low I
CSL
—0.01—µACS = V
SS
CS High Specifications
CS
Logic Threshold, High V
IH
0.8 V
DD
—V
DD
V
CS
Input Current, High I
CSH
—0.7 2µACS = V
DD
GND Current per Amplifier I
SS
—-0.7—µACS = V
DD
Amplifier Output Leakage — — 0.01 — µA CS = V
DD
Dynamic Specifications (Note 1)
CS
Low to Valid Amplifier
Output, Turn-on Time
t
ON
—410µsCS Low ≤ 0.2 V
DD
, G = +1 V/V,
V
IN
= V
DD
/2, V
OUT
= 0.9 V
DD
/2,
V
DD
= 5.0V
CS
High to Amplifier Output High-Z t
OFF
—0.01— µsCS High ≥ 0.8 V
DD
, G = +1 V/V,
V
IN
= V
DD
/2, V
OUT
= 0.1 V
DD
/2
Hysteresis V
HYST
—0.6—VV
DD
= 5V
Note 1: The input condition (V
IN
) specified applies to both op amp A and B of the MCP6285. The dynamic specification is tested
at the output of op amp B (V
OUTB
).
V
IL
Hi-Z
t
ON
V
IH
CS
t
OFF
V
OUT
-0.7 µA
Hi-Z
I
SS
I
CS
0.7 µA
0.7 µA
-0.7 µA
-450 µA
10 nA
(typical)
(typical)
(typical)
(typical)
(typical)
(typical)