MCP4921 datasheet(4/50 Pages) MICROCHIP

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MCP4901/4911/4921

DS22248A-page 4

 2010 Microchip Technology Inc.

Offset Error

VOS

—

±0.02

% of

FSR

Code = 0x000h

Offset Error Temperature

Coefficient

VOS/°C

—

0.16

—

ppm/°C

-45°C to 25°C

—

-0.44

—

ppm/°C

+25°C to 85°C

Gain Error

—

-0.10

% of

FSR

Code = 0xFFFh, not including

offset error

Gain Error Temperature

Coefficient

G/°C

—

-3

—

ppm/°C

Input Amplifier (VREF Input)

Input Range – Buffered

Mode

VREF

0.040

—

VDD –

0.040

Note 2

Code = 2048

VREF = 0.2 Vp-p, f = 100 Hz and

1kHz

Input Range – Unbuffered

Mode

VREF

0—

VDD

Input Impedance

RVREF

—165

—



Unbuffered Mode

Input Capacitance –

Unbuffered Mode

CVREF

—7

—

Multiplier Mode

-3 dB Bandwidth

fVREF

—450

—

kHz

VREF = 2.5V ±0.2Vp-p,

Unbuffered, G = 1

fVREF

—400

—

kHz

VREF = 2.5V ±0.2 Vp-p,

Unbuffered, G = 2

Multiplier Mode –

Total Harmonic Distortion

THDVREF

—-73

—

VREF = 2.5V ±0.2Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing

VOUT

—

0.01 to

VDD –

0.04

—

Accuracy is better than 1 LSb for

VOUT = 10 mV to (VDD – 40 mV)

Phase Margin

m

—

Degrees

Slew Rate

—

0.55

—

V/µs

Short Circuit Current

ISC

—15

Settling Time

tsettling

—

4.5

—

µs

Within 1/2 LSB of final value from

1/4 to 3/4 full-scale range

Dynamic Performance (Note 2)

DAC-to-DAC Crosstalk

—

nV-s

Major Code Transition

Glitch

—

nV-s

1 LSB change around major carry

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

Digital Feedthrough

—

nV-s

Analog Crosstalk

—

nV-s

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, VDD = 5V, VSS = 0V, VREF = 2.048V, Output Buffer Gain

(G) = 2x, RL = 5 k to GND, CL = 100 pF TA = -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.

This parameter is ensured by design, and not 100% tested.

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