Datasheet

MCP4801/4811/4821
DS22244B-page 4  2010 Microchip Technology Inc.
Internal Voltage Reference (V
REF
)
Internal Reference Voltage V
REF
2.008 2.048 2.088 V V
OUT
when G = 1x and
Code = 0xFFFh
Temperature Coefficient
(Note 2)
V
REF
/°C
— 125 325 ppm/°C -40°C to 0°C
— 0.25 0.65 LSb/°C -40°C to 0°C
— 45 160 ppm/°C 0°C to +85°C
— 0.09 0.32 LSb/°C 0°C to +85°C
Output Noise (V
REF
Noise) E
NREF
(0.1-10 Hz)
—290—µV
p-p
Code = 0xFFFh, G = 1x
Output Noise Density e
NREF
(1 kHz)
—1.2—µV/Hz Code = 0xFFFh, G = 1x
e
NREF
(10 kHz)
—1.0—µV/Hz Code = 0xFFFh, G = 1x
1/f Corner Frequency f
CORNER
—400— Hz
Output Amplifier
Output Swing V
OUT
— 0.01 to
V
DD
– 0.04
— V Accuracy is better than 1 LSb
for V
OUT
= 10 mV to
(V
DD
–40mV)
Phase Margin PM — 66 — Degree (°) C
L
= 400 pF, R
L
= 
Slew Rate SR — 0.55 — V/µs
Short Circuit Current I
SC
—1524mA
Settling Time t
SETTLING
— 4.5 — µs Within ½ LSb of final value
from ¼ to ¾ full-scale range
Dynamic Performance (Note 2)
Major Code Transition Glitch — 45 — nV-s 1 LSb change around major
carry (0111...1111 to
1000...0000)
Digital Feedthrough — <10 — nV-s
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V,
Output Buffer Gain (G) = 2x, RL = 5 k to GND, C
L
= 100 pF, T
A
= -40 to +85°C. Typical values are at +25°C.
Parameters Sym Min Typ Max Units Conditions
Note 1: Guaranteed monotonic by design over all codes.
2: This parameter is ensured by design, and not 100% tested.