Data Sheet
Table Of Contents
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- Figure 2-1: DNL vs. Code.
- Figure 2-2: DNL vs. Code and Ambient Temperature.
- Figure 2-3: Absolute DNL vs. Ambient Temperature.
- Figure 2-4: INL vs. Code and Ambient Temperature.
- Figure 2-5: Absolute INL vs. Ambient Temperature.
- Figure 2-6: INL vs. Code.
- Figure 2-7: Full-Scale VOUTA w/G = 1 (VREF) vs. Ambient Temperature and VDD.
- Figure 2-8: Full-Scale VOUTA w/G = 2 (2VREF) vs.Ambient Temperature and VDD.
- Figure 2-9: Output Noise Voltage Density (VREF Noise Density w/G = 1) vs. Frequency.
- Figure 2-10: Output Noise Voltage (VREF Noise Voltage w/G = 1) vs. Bandwidth.
- Figure 2-11: MCP4821 IDD vs. Ambient Temperature and VDD.
- Figure 2-12: MCP4821 IDD Histogram (VDD = 2.7V).
- Figure 2-13: MCP4821 IDD Histogram (VDD = 5.0V).
- Figure 2-14: MCP4822 IDD vs. Ambient Temperature and VDD.
- Figure 2-15: MCP4822 IDD Histogram (VDD = 2.7V).
- Figure 2-16: MCP4822 IDD Histogram (VDD = 5.0V).
- Figure 2-17: Hardware Shutdown Current vs. Ambient Temperature and VDD.
- Figure 2-18: Software Shutdown Current vs. Ambient Temperature and VDD.
- Figure 2-19: Offset Error vs. Ambient Temperature and VDD.
- Figure 2-20: Gain Error vs. Ambient Temperature and VDD.
- Figure 2-21: VIN High Threshold vs. Ambient Temperature and VDD.
- Figure 2-22: VIN Low Threshold vs. Ambient Temperature and VDD.
- Figure 2-23: Input Hysteresis vs. Ambient Temperature and VDD.
- Figure 2-24: VOUT High Limit vs. Ambient Temperature and VDD.
- Figure 2-25: VOUT Low Limit vs. Ambient Temperature and VDD.
- Figure 2-26: IOUT High Short vs. Ambient Temperature and VDD.
- Figure 2-27: IOUT vs. VOUT. Gain = 2.
- Figure 2-28: VOUT Rise Time 100%.
- Figure 2-29: VOUT Fall Time.
- Figure 2-30: VOUT Rise Time 50%.
- Figure 2-31: VOUT Rise Time 25% - 75%.
- Figure 2-32: VOUT Rise Time Exit Shutdown.
- Figure 2-33: PSRR vs. Frequency.
- 3.0 Pin descriptions
- 4.0 General Overview
- 5.0 Serial Interface
- 6.0 Typical Applications
- 6.1 Digital Interface
- 6.2 Power Supply Considerations
- 6.3 Output Noise Considerations
- 6.4 Layout Considerations
- 6.5 Single-Supply Operation
- 6.6 Bipolar Operation
- 6.7 Selectable Gain and Offset Bipolar Voltage Output Using A Dual DAC
- 6.8 Designing A Double-Precision DAC Using A Dual DAC
- 6.9 Building A Programmable Current Source
- 7.0 Development support
- 8.0 Packaging Information
MCP4821/MCP4822
DS21953A-page 4 © 2005 Microchip Technology Inc.
Internal Voltage Reference (V
REF
)
Nominal Reference Voltage V
REF
2.008 2.048 2.088 V V
OUTA
when G = 1x and
Code = 0xFFFh
Temperature Coefficient
(Note 1)
ΔV
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 = 1
Output Noise Density e
NREF
(1 kHz)
—1.2 —µV/
√
Hz Code = 0xFFFh, G = 1
e
NREF
(10 kHz)
—1.0 —µV/
√
Hz Code = 0xFFFh, G = 1
1/f Corner Frequency f
CORNER
— 400 — Hz
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 PM — 66 — °
Slew Rate SR — 0.55 — V/µs
Short Circuit Current I
SC
—14 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
3V AC/DC CHARACTERISTICS (CONTINUED)
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
Note 1: By design, not production tested.
2: Too small to quantify.
5V EXTENDED TEMPERATURE SPECIFICATIONS
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. Typical values at +125°C by characterization or simulation.
Parameters Sym Min Typ Max Units Conditions
Power Requirements
Input Voltage V
DD
2.7 — 5.5
Input Current - MCP4821
Input Current - MCP4822
I
DD
—
—
350
440
— µA Digital inputs grounded, Output
unloaded, code = 0x000
Hardware Shutdown Current I
SHDN
—1.5— µA
Software Shutdown Current I
SHDN_SW
—5—µA
Power-On Reset threshold V
POR
—1.85— V
DC Accuracy
Resolution n 12 — — Bits
INL Error INL — ±4 — LSb
Note 1: By design, not production tested.
2: Too small to quantify.