Microchip MCP4912-E/SL

Attributes

Part Number
Manufacturer
Description
Datasheet
Prefix
U
Digikey Description
Digikey Part Number
Imported From Octopart
yes
Lead Free
Yes
Mouser Part Number
Octopart Part Number
da97128f4ca60550
Package
SOIC-14
RoHS
Yes
Temperature Range High
Temperature Range Low
Number Of Outputs
2.00
Supply Current
0.40 mA

Pins

1
VDD
2
NC
3
/CS
4
SCK
5
SDI
6
NC
7
NC
8
/LDAC
9
/SHDN
10
VOUTB
11
VREFB
12
VSS
13
VREFA
14
VOUTA

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Contributors

Datasheet Preview

2010 Microchip Technology Inc. DS22250A-page 1
MCP4902/4912/4922
Features
MCP4902: Dual 8-Bit Voltage Output DAC
MCP4912: Dual 10-Bit Voltage Output DAC
MCP4922: Dual 12-Bit Voltage Output DAC
Rail-to-Rail Output
SPI Interface with 20 MHz Clock Support
Simultaneous Latching of the Dual DACs
with LDAC
pin
Fast Settling Time of 4.5 µs
Selectable Unity or 2x Gain Output
External Voltage Reference Inputs
External Multiplier Mode
2.7V to 5.5V Single-Supply Operation
Extended Temperature Range: -40°C to +125°C
Applications
Set Point or Offset Trimming
Precision Selectable Voltage Reference
Motor Control Feedback Loop
Digitally-Controlled Multiplier/Divider
Calibration of Optical Communication Devices
Related Products
(1)
Description
The MCP4902/4912/4922 devices are dual 8-bit,
10-bit, and 12-bit buffered voltage output
Digital-to-Analog Converters (DACs), respectively. The
devices operate from a single 2.7V to 5.5V supply with
SPI compatible Serial Peripheral Interface. The user
can configure the full-scale range of the device to be
V
REF
or 2 * V
REF
by setting the Gain Selection Option
bit (gain of 1 of 2).
The user can shut down both DAC channels by using
SHDN
pin or shut down the DAC channel individually
by setting the Configuration register bits. In Shutdown
mode, most of the internal circuits in the shutdown
channel are turned off for power savings and the output
amplifier is configured to present a known high
resistance output load (500 ktypical.
The devices include double-buffered registers,
allowing synchronous updates of two DAC outputs,
using the LDAC
pin. These devices also incorporate a
Power-on Reset (POR) circuit to ensure reliable power-
up.
The devices utilize a resistive string architecture, with
its inherent advantages of low DNL error and fast
settling time. These devices are specified over the
extended temperature range (+125°C).
The devices provide high accuracy and low noise
performance for consumer and industrial applications
where calibration or compensation of signals (such as
temperature, pressure and humidity) are required.
The MCP4902/4912/4922 devices are available in the
PDIP, SOIC and TSSOP packages.
Package Types
P/N
DAC
Resolution
No. of
ChannelS
Voltage
Reference
(V
REF
)
MCP4801 8 1
Internal
(2.048V)
MCP4811 10 1
MCP4821 12 1
MCP4802 8 2
MCP4812 10 2
MCP4822 12 2
MCP4901 8 1
External
MCP4911 10 1
MCP4921 12 1
MCP4902 8 2
MCP4912 10 2
MCP4922 12 2
Note 1: The products listed here have similar AC/
DC performances.
MCP4902: 8-bit dual DAC
MCP4912: 10-bit dual DAC
MCP4922: 12-bit dual DAC
141
2
3
4
13
12
11
10
9
8
5
6
7
14-Pin PDIP, SOIC, TSSOP
V
DD
NC
CS
SCK
V
REFB
NC
NC
SDI
LDAC
SHDN
V
OUTB
V
OUTA
V
REFA
V
SS
MCP49X2
8/10/12-Bit Dual Voltage Output Digital-to-Analog Converter
with SPI Interface
MCP4902/4912/4922
DS22250A-page 2 2010 Microchip Technology Inc.
Block Diagram
Op Amps
V
DD
V
SS
CS SDI SCK
Interface Logic
Input
Register A
Register B
Input
DAC
A
Register Register
DAC
B
String
DAC
B
String
DAC
A
Power-on
Reset
V
OUTA
V
OUTB
LDAC
Output
Gain
Logic
Gain
Logic
Output
Logic
SHDN
V
REF
A
V
REF
B
Buffer
Buffer
2010 Microchip Technology Inc. DS22250A-page 3
MCP4902/4912/4922
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
V
DD
....................................................................... 6.5V
All inputs and outputs w.r.t .....V
SS
–0.3V to V
DD
+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
J
)................+150°C
† Notice: Stresses above those listed under “Maximum
Ratings” 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. Exposure to maximum rating conditions
for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V, Output Buffer Gain (G) = 2x, R
L
= 5 k to
GND, C
L
= 100 pF T
A
= -40 to +85°C. Typical values are at +25°C.
Parameters Sym Min Typ Max Units Conditions
Power Requirements
Operating Voltage V
DD
2.7 5.5 V
Operating CurrentInput Cur-
rent
I
DD
350 700 µA V
DD
= 5V
V
DD
= 3V
V
REF
input is unbuffered, all digital
inputs are grounded, all analog
outputs (V
OUT
) are unloaded.
Code = 000h.
250 500 µA
Hardware Shutdown Current I
SHDN
0.3 2 µA Power-on Reset circuit is turned
off
Software Shutdown Current I
SHDN_SW
3.3 6 µA Power-on Reset circuit stays on
Power-on-Reset Threshold V
POR
—2.0 V
DC Accuracy
MCP4902
Resolution n 8 Bits
INL Error INL -1 ±0.125 1 LSb
DNL
DNL -0.5 ±0.1 +0.5 LSb Note 1
MCP4912
Resolution n 10 Bits
INL Error INL -3.5 ±0.5 3.5 LSb
DNL DNL -0.5 ±0.1 +0.5 LSb Note 1
MCP4922
Resolution n 12 Bits
INL Error INL -12 ±2 12 LSb
DNL DNL -0.75 ±0.2 +0.75 LSb Note 1
Offset Error V
OS
±0.02 1 % of
FSR
Code = 0x000h
Note 1: Guaranteed monotonic by design over all codes.
2: This parameter is ensured by design, and not 100% tested.
MCP4902/4912/4922
DS22250A-page 4 2010 Microchip Technology Inc.
Offset Error Temperature
Coefficient
V
OS
/°C 0.16 ppm/°C -45°C to 25°C
-0.44 ppm/°C +25°C to 85°C
Gain Error g
E
-0.10 1 % of
FSR
Code = 0xFFFh, not including off-
set 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 2
Code = 2048
V
REF
= 0.2V p-p, f = 100 Hz and
1kHz
Input Range – Unbuffered
Mode
V
REF
0— V
DD
V
Input Impedance R
VREF
—165 k Unbuffered Mode
Input Capacitance –
Unbuffered Mode
C
VREF
—7 pF
Multiplier Mode -3 dB
Bandwidth
f
VREF
—450 kHzV
REF
= 2.5V ±0.2Vp-p,
Unbuffered, G = 1x
f
VREF
—400 kHzV
REF
= 2.5V ±0.2 Vp-p,
Unbuffered, G = 2x
Multiplier Mode –
Total Harmonic Distortion
THD
VREF
—-73 dBV
REF
= 2.5V ±0.2Vp-p,
Frequency = 1 kHz
Output Amplifier
Output Swing V
OUT
0.01 to
V
DD
– 0.04
V Accuracy is better than 1 LSb for
V
OUT
= 10 mV to (V
DD
– 40 mV)
Phase Margin m 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 (Note 2)
DAC-to-DAC Crosstalk 10 nV-s
Major Code Transition Glitch 45 nV-s 1 LSb change around major carry
(0111...1111 to 1000...0000)
Digital Feedthrough 10 nV-s
Analog Crosstalk 10 nV-s
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, V
DD
= 5V, V
SS
= 0V, V
REF
= 2.048V, Output Buffer Gain (G) = 2x, R
L
= 5 k to
GND, C
L
= 100 pF T
A
= -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.
2: This parameter is ensured by design, and not 100% tested.