MCP4921 datasheet(4/40 Pages) MICROCHIP

4 / 40 page

MCP4921/4922

DS21897A-page 4

 2004 Microchip Technology Inc.

Input Capacitance –

Unbuffered Mode

CVREF

—7

—

Multiplier Mode

-3 dB Bandwidth

fVREF

—

440

—

kHz

VREF = 2.048V ±0.1 Vp-p, unbuffered,

G = 1

fVREF

—

390

—

kHz

VREF = 2.048V ±0.1 Vp-p, unbuffered,

G = 2

Multiplier Mode –

Total Harmonic Distortion

THDVREF

—-73

—

VREF = 2.5V ±0.1 Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing

VOUT

—

0.010

to VDD

– 0.040

—

Accuracy is better than 1 LSB for

VOUT = 10 mV to (VDD – 40 mV)

Phase Margin

θm

—

degrees

Slew Rate

—

0.55

—

V/µs

Short Circuit Current

ISC

—14

Settling Time

tsettling

—

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

—

nV-s

Note 2

Major Code Transition Glitch

—

nV-s

1 LSB change around major carry

(0111...1111 to 1000...0000)

Digital Feedthrough

—

nV-s

Note 2

Analog Crosstalk

—

nV-s

Note 2

3V AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, VDD = 3V, AVSS = 0V, VREF = 2.048V external, output buffer gain (G) = 1x,

RL = 5 kΩ to GND, CL = 100 pF TA = -40 to +85°C. Typical values at 25°C

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note

By design, not production tested.

Too small to quantify.

5V EXTENDED TEMPERATURE SPECIFICATIONS

Electrical Specifications: Unless otherwise indicated, VDD = 5V, AVSS = 0V, VREF = 2.048V, output buffer gain (G) = 2x, RL = 5 kΩ

to GND, CL = 100 pF. Typical values at +125°C by characterization or simulation.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Power Requirements

Input Voltage

VDD

2.7

—

5.5

Input Current - MCP4921

Input Current - MCP4922

IDD

—

200

400

—

µA

Input unbuffered, digital inputs

grounded, output unloaded,

code at 0x000

Hardware Shutdown Current

ISHDN

—1.5

—

µA

Software Shutdown Current

ISHDN_SW

—5

—

µA

Power-On Reset threshold

VPOR

—1.85

—

DC Accuracy

Resolution

—

Bits

INL Error

INL

—

±4

—

LSB

DNL

—

±0.25

—

LSB

Device is Monotonic

Offset Error

VOS

—

±0.02

—

% of FSR

Code 0x000h

Offset Error Temperature

Coefficient

VOS/°C

—

-5

—

ppm/°C

+25°C to +125°C

Note

By design, not production tested.

Too small to quantify.

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