Datasheet
2004 Microchip Technology Inc. DS21897A-page 3
MCP4921/4922
Output Amplifier
Output Swing V
OUT
— 0.010
to V
DD
– 0.040
— Accuracy is better than 1 LSB for
V
OUT
= 10 mV to (V
DD
– 40 mV)
Phase Margin
θm — 66 — degrees
Slew Rate SR — 0.55 — V/µs
Short Circuit Current I
SC
—15 24 mA
Settling Time t
settling
— 4.5 — µs Within 1/2 LSB of final value from 1/4
to 3/4 full-scale range
Dynamic Performance
DAC-to-DAC Crosstalk — 10 — nV-s 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 Note 2
Analog Crosstalk — 10 — nV-s Note 2
5V AC/DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
DD
= 5V, AV
SS
= 0V, V
REF
= 2.048V, output buffer gain (G) = 2x, R
L
= 5 kΩ
to GND, C
L
= 100 pF T
A
= -40 to +85°C. Typical values at +25°C.
Parameters Sym Min Typ Max Units Conditions
Note 1: By design, not production tested.
2: Too small to quantify.
3V AC/DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
DD
= 3V, AV
SS
= 0V, V
REF
= 2.048V external, output buffer gain (G) = 1x,
R
L
= 5 kΩ to GND, C
L
= 100 pF T
A
= -40 to +85°C. Typical values at 25°C
Parameters Sym Min Typ Max Units Conditions
Power Requirements
Input Voltage V
DD
2.7 — 5.5
Input Current - MCP4921
Input Current - MCP4922
I
DD
—
—
125
250
250
500
µA Input unbuffered, digital inputs
grounded, output unloaded,
code at 0x000
Hardware Shutdown Current I
SHDN
—0.25 2 µA
Software Shutdown Current I
SHDN_SW
—2 6 µA
Power-On Reset threshold V
POR
—2.0 — V
DC Accuracy
Resolution n 12 — — Bits
INL Error INL -12 ±3 +12 LSB
DNL DNL -0.75 ±0.3 +0.75 LSB Device is Monotonic
Offset Error V
OS
— ±0.02 1 % of FSR Code 0x000h
Offset Error Temperature
Coefficient
V
OS
/°C — 0.5 — ppm/°C -45°C to 25°C
— -0.77 — ppm/°C +25°C to 85°C
Gain Error g
E
— -0.15 1 % of FSR Code 0xFFFh, not including offset
error.
Gain Error Temperature
Coefficient
∆G/°C — -3 — ppm/°C
Input Amplifier (V
REF
Input)
Input Range - Buffered Mode V
REF
0.040 — V
DD
-0.040 V Note 1
Code = 2048,
V
REF
= 0.2v p-p, f = 100 Hz and 1 kHz
Input Range - Unbuffered
Mode
V
REF
0— V
DD
V
Input Impedance R
VREF
— 165 — kΩ Unbuffered Mode
Note 1: By design, not production tested.
2: Too small to quantify.