2004 Microchip Technology Inc.

DS21897A-page 1

MCP4921/4922

Features

· 12-Bit Resolution

· ±0.2 LSB DNL (typ)

· ±2 LSB INL (typ)

· Single or Dual Channel

· Rail-to-Rail Output

· SPITM Interface with 20 MHz Clock Support

· Simultaneous Latching of the Dual DACs w/LDAC

· Fast Settling Time of 4.5 µs

· Selectable Unity or 2x Gain Output

· 450 kHz Multiplier Mode

· External V

REF

Input

· 2.7V to 5.5V Single-Supply Operation

· Extended Temperature Range: -40°C to +125°C

Applications

· Set Point or Offset Trimming

· Sensor Calibration

· Digitally-Controlled Multiplier/Divider

· Portable Instrumentation (Battery-Powered)

· Motor Feedback Loop Control

Block Diagram

Description

The Microchip Technology Inc. MCP492X are 2.7

5.5V, low-power, low DNL, 12-Bit Digital-to-Analog Con-

verters (DACs) with optional 2x buffered output and SPI
interface.

The MCP492X are DACs that provide high accuracy
and low noise performance for industrial applications
where calibration or compensation of signals (such as
temperature, pressure and humidity) are required.

The MCP492X are available in the extended tempera-
ture range and PDIP, SOIC, MSOP and TSSOP
packages.

The MCP492X devices utilize a resistive string archi-
tecture, with its inherent advantages of low DNL error,
low ratio metric temperature coefficient and fast settling
time. These devices are specified over the extended
temperature range. The MCP492X include double-
buffered inputs, allowing simultaneous updates using
the LDAC pin. These devices also incorporate a
Power-On Reset (POR) circuit to ensure reliable
power-up.

Package Types

Op Amps

SDI

SCK

Interface Logic

Input

DAC

String

DAC

String
DAC

REF

Output

Logic

Power-on

Reset

REF

OUTA

OUTB

LDAC

Buffer

SHDN

Output

Gain

Logic

Gain

Logic

P4
921

8-Pin PDIP, SOIC, MSOP

SCK

SDI

OUTA

REFA

LDAC

P4
922

14-Pin PDIP, SOIC, TSSOP

SCK

REFB

SDI

LDAC

SHDN

OUTB

OUTA

REFA

12-Bit DAC with SPITM Interface

MCP4921/4922

DS21897A-page 2

2004 Microchip Technology Inc.

1.0

ELECTRICAL
CHARACTERISTICS

Absolute Maximum Ratings

DD .............................................................................................................

6.5V

All inputs and outputs w.r.t ............. AV

0.3V to V

+0.3V

Current at Input Pins ....................................................±2 mA

Current at Supply Pins ...............................................±50 mA

Current at Output Pins ...............................................±25 mA

Storage temperature .....................................-65°C to +150°C

Ambient temp. with power applied ................-55°C to +125°C

ESD protection on all pins

...........

4 kV (HBM),

400V (MM)

Maximum Junction Temperature (T

) . .........................+150°C

Notice: Stresses above those listed under "Maximum Rat-
ings" may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.

5V AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 k

to GND, C

= 100 pF T

= -40 to +85°C. Typical values at +25°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Power Requirements

Input Voltage

2.7

5.5

Input Current - MCP4921

Input Current

- MCP4922

--
--

175
350

350
700

µA

Input unbuffered, digital inputs
grounded, output unloaded,
code at 0x000

Hardware Shutdown Current

SHDN

0.3

µA

Software Shutdown Current

SHDN_SW

3.3

µA

Power-on-Reset Threshold

POR

2.0

DC Accuracy

Resolution

Bits

INL Error

INL

-12

LSB

DNL

-0.75

±0.2

+0.75

LSB

Device is Monotonic

Offset Error

±0.02

% of FSR

Code 0x000h

Offset Error Temperature
Coefficient

/°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 (V

REF

Input)

Input Range - Buffered Mode

REF

0.040

Note 1
Code = 2048
V

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered
Mode

REF

Input Impedance

VREF

165

Unbuffered Mode

Input Capacitance -
Unbuffered Mode

VREF

Multiplier Mode
-3 dB Bandwidth

VREF

450

kHz

REF

= 2.5V ±0.2Vp-p, Unbuffered,

G = 1

VREF

400

kHz

REF

= 2.5V ±0.2 Vp-p, Unbuffered,

G = 2

Multiplier Mode -
Total Harmonic Distortion

THD

VREF

-73

REF

= 2.5V ±0.2Vp-p,

Frequency = 1 kHz

Note

By design, not production tested.

Too small to quantify.

2004 Microchip Technology Inc.

DS21897A-page 3

MCP4921/4922

Output Amplifier

Output Swing

OUT

0.010

to V

0.040

Accuracy is better than 1 LSB for
V

OUT

= 10 mV to (V

40 mV)

Phase Margin

degrees

Slew Rate

0.55

V/µs

Short Circuit Current

Settling Time

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

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

5V AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 k

to GND, C

= 100 pF T

= -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.

3V AC/DC CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, V

= 3V, AV

= 0V, V

REF

= 2.048V external, output buffer gain (G) = 1x,

= 5 k

to GND, C

= 100 pF T

= -40 to +85°C. Typical values at 25°C

Parameters

Sym

Min

Typ

Max

Units

Conditions

Power Requirements

Input Voltage

2.7

5.5

Input Current - MCP4921

Input Current

- MCP4922

--
--

125
250

250
500

µA

Input unbuffered, digital inputs
grounded, output unloaded,
code at 0x000

Hardware Shutdown Current

SHDN

0.25

µA

Software Shutdown Current

SHDN_SW

µA

Power-On Reset threshold

POR

2.0

DC Accuracy

Resolution

Bits

INL Error

INL

-12

±3

+12

LSB

DNL DNL

-0.75

±0.3

+0.75

LSB

Device

Monotonic

Offset Error

±0.02

% of FSR

Code 0x000h

Offset Error Temperature
Coefficient

/°C

0.5

ppm/°C

-45°C to 25°C

-0.77

ppm/°C

+25°C to 85°C

Gain Error

-0.15

% 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

REF

0.040

-0.040

Note 1
Code = 2048,
V

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered
Mode

REF

Input Impedance

VREF

165

Unbuffered Mode

Note

By design, not production tested.

Too small to quantify.

MCP4921/4922

DS21897A-page 4

2004 Microchip Technology Inc.

Input Capacitance
Unbuffered Mode

VREF

Multiplier Mode
-3 dB Bandwidth

VREF

440

kHz

REF

= 2.048V ±0.1 Vp-p, unbuffered,

G = 1

VREF

390

kHz

REF

= 2.048V ±0.1 Vp-p, unbuffered,

G = 2

Multiplier Mode
Total Harmonic Distortion

THD

VREF

-73

REF

= 2.5V ±0.1 Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing

OUT

0.010

to V

0.040

Accuracy is better than 1 LSB for
V

OUT

= 10 mV to (V

40 mV)

Phase Margin

degrees

Slew Rate

0.55

V/µs

Short Circuit Current

Settling Time

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

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, V

= 3V, AV

= 0V, V

REF

= 2.048V external, output buffer gain (G) = 1x,

= 5 k

to GND, C

= 100 pF T

= -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, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 k

to GND, C

= 100 pF. Typical values at +125°C by characterization or simulation.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Power Requirements

Input Voltage

2.7

5.5

Input Current - MCP4921

Input Current

- MCP4922

--
--

200
400

--
--

µA

Input unbuffered, digital inputs
grounded, output unloaded,
code at 0x000

Hardware Shutdown Current

SHDN

1.5

µA

Software Shutdown Current

SHDN_SW

µA

Power-On Reset threshold

POR

1.85

DC Accuracy

Resolution

Bits

INL Error

INL

±4

LSB

DNL

±0.25

LSB

Device is Monotonic

Offset Error

±0.02

% of FSR

Code 0x000h

Offset Error Temperature
Coefficient

/°C

-5

ppm/°C

+25°C to +125°C

Note

By design, not production tested.

Too small to quantify.

2004 Microchip Technology Inc.

DS21897A-page 5

MCP4921/4922

Gain Error

-0.10

% 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

REF

0.040 to

0.040

Note 1
Code = 2048,
V

REF

= 0.2v p-p, f = 100 Hz and 1 kHz

Input Range - Unbuffered
Mode

REF

Input Impedance

VREF

174

Unbuffered Mode

Input Capacitance -
Unbuffered Mode

VREF

Multiplying Mode
-3 dB Bandwidth

VREF

450

kHz

REF

= 2.5V ±0.1 Vp-p, Unbuffered,

G=1

VREF

400

kHz

REF

= 2.5V ±0.1 Vp-p, Unbuffered,

G = 2

Multiplying Mode - Total
Harmonic Distortion

THD

VREF

REF

= 2.5V ±0.1Vp-p,

Frequency = 1 kHz

Output Amplifier

Output Swing

OUT

0.010 to

0.040

Accuracy is better than 1 LSB for
V

OUT

= 10 mV to (V

40 mV)

Phase Margin

degrees

Slew Rate

0.55

V/µs

Short Circuit Current

Settling Time

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

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

5V EXTENDED TEMPERATURE SPECIFICATIONS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, V

= 5V, AV

= 0V, V

REF

= 2.048V, output buffer gain (G) = 2x, R

= 5 k

to GND, C

= 100 pF. Typical values at +125°C by characterization or simulation.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note

By design, not production tested.

Too small to quantify.

Document Outline

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MCP4921T-EMS

Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MCP4921T-EMS