ICmic
IC MICROSYSTEMS
ICM7361/7341/7321
SINGLE 12/10/8-
BIT
V
OLTAGE
-O
UTPUT
DAC
S
with guaranteed monotonic behavior. These DACs are
available in both a tiny 6-pin SOT-23 package and an 8-
pin MSOP package. They include a 1.25V reference for
ease of use and flexibility. The reference output is
available on a separate pin, in the 8-pin package version,
and can be used to drive external loads. The operating
supply range is 2.7V to 5.5V.
The input interface is an easy to use three-wire SPI/QSPI
compatible interface. The DAC has a double buffered
digitalkinput.
FEATURES
•
12/10/8-Bit Monotonic DACs in 6 lead SOT-23
Package
•
Wide Output Voltage Swing
•
Micro-Power
•
On Board 1.25V Reference
•
Serial Interface with three-wire SPI/QSPI and
Microwire Interface Compatible
•
8µs Full-Scale Settling Time
APPLICATIONS
•
Battery-Powered Applications
•
Industrial Process Control
•
Digital Gain and Offset Adjustment
OVERVIEW
The ICM7361, ICM7341 and ICM7321 are 12-Bit, 10-Bit
and 8-Bit wide output voltage swing DACs respectively,
BLOCK DIAGRAM
V
DD
ICM 7361/7341/7321
REFOUT
(MSOP-8
Package Only)
Reference
Input and
DAC Latch
12/10/8 -Bit
DAC
x2
V
OUT
SDI
Input Control Logic, Registers and Latches
Power-On-
Reset
SCK
CS
GND
PACKAGE
SOT-23
8-Pin MSOP
V
OUT
1
GND 2
V
DD
3
6 CS
5 SCK
4 SDI
V
DD
1
REFOUT 2
NC 3
V
OUT
4
8 GND
7 SDI
6 SCK
5 CS
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
1
ICmic
IC MICROSYSTEMS
ICM7361/7341/7321
SINGLE 12/10/8-
BIT
V
OLTAGE
-O
UTPUT
DAC
S
PIN DESCRIPTION (MSOP-8 Package)
Pin No
1
2
3
4
V
DD
Symbol
Supply Voltage
Reference Output (1.25V)
No Connect
DAC Output
Description
REFOUT
NC
V
OUT
CS
SCK
SDI
GND
5
6
7
8
Chip Select (TTL or CMOS)
Serial Clock Input (TTL or CMOS)
Serial Data Input (TTL or CMOS)
Ground
PIN DESCRIPTION (SOT-23 Package)
Pin No
1
2
3
V
OUT
Symbol
DAC Output
Ground
Supply Voltage
Description
GND
V
DD
4
5
SDI
SCK
Serial Data Input (TTL or CMOS)
Serial Clock Input (TTL or CMOS)
6
CS
Chip Select (TTL or CMOS)
ABSOLUTE MAXIMUM RATING
Symbol
V
DD
I
IN
V
IN_
V
IN_REF
T
STG
T
SOL
Supply Voltage
Input Current
Parameter
Value
-0.3 to 7.0
+/- 25.0
-0.3 to 7.0
-0.3 to 7.0
-65 to +150
300
V
Unit
mA
V
V
o
o
Digital Input Voltage (SCK, SDI, CS)
Reference Input Voltage
Storage Temperature
Soldering Temperature
C
C
Note:
Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress
rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
2
ICmic
IC MICROSYSTEMS
ICM7361/7341/7321
SINGLE 12/10/8-
BIT
V
OLTAGE
-O
UTPUT
DAC
S
ORDERING INFORMATION
Part
ICM7361M
ICM7341M
ICM7321M
Temperature Range
-40
o
C to 85
o
C
-40
o
C to 85
o
C
-40
o
C to 85
o
C
Package
8-Pin MSOP
8-Pin MSOP
8-Pin MSOP
ORDERING INFORMATION
Part
ICM7361T
ICM7341T
ICM7321T
Temperature Range
-40
o
C to 85
o
C
-40
o
C to 85
o
C
-40
o
C to 85
o
C
SOT-23
SOT-23
SOT-23
Package
DC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.7V to 5.5V ; V
OUT
unloaded; all specifications T
MIN
to T
MAX
unless otherwise noted)
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
DC PERFORMANCE
ICM7361
N
Resolution
DNL
Differential Nonlinearity
INL
Integral Nonlinearity
ICM7341
N
Resolution
DNL
Differential Nonlinearity
INL
Integral Nonlinearity
ICM7321
N
Resolution
DNL
Differential Nonlinearity
INL
Integral Nonlinearity
GE
Gain Error
OE
Offset Error
POWER REQUIREMENTS
V
DD
Supply Voltage
I
DD
Supply Current
12
(Notes 1 & 3)
(Notes 1 & 3)
10
(Notes 1 & 3)
(Notes 1 & 3)
8
(Notes 1 & 3)
(Notes 1 & 3)
0.05
0.25
+1.0
+0.75
+0.5
+25
2.7
(Note 4)
0.2
5.5
0.5
0.1
1.0
+1.0
+3.0
0.4
4.0
+1.0
+12.0
Bits
LSB
LSB
Bits
LSB
LSB
Bits
LSB
LSB
% of FS
mV
V
mA
Symbol
Parameter
Test Conditions
Min
Typ
Max
Unit
OUTPUT CHARACTERISTICS
Output Voltage Range
VO
SC
Short Circuit Current
R
OUT
Amp Output Impedance
Output Line Regulation
LOGIC INPUTS
V
IH
Digital Input High
V
IL
Digital Input Low
Digital Input Leakage
(Note 3)
At Mid-scale (Note 2)
At 0-scale (Note 2)
V
DD
=2.7 to 5.5 V
(Note 2)
(Note 2)
0
60
1.0
100
0.4
2.4
V
DD
150
5.0
200
3.0
V
mA
Ω
Ω
mV/V
V
V
µΑ
0.8
5
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
3
ICmic
REFERENCE
V
REFOUT
IC MICROSYSTEMS
ICM7361/7341/7321
SINGLE 12/10/8-
BIT
V
OLTAGE
-O
UTPUT
DAC
S
Reference Output
Reference Output Line
Regulation
1.2
V
DD
=2.7 to 5.5 V
1.25
0.8
1.3
4.0
V
mV/V
AC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.7V to 5.5V; V
OUT
unloaded; all specifications T
MIN
to T
MAX
unless otherwise noted)
Symbol
SR
Parameter
Slew Rate
Settling Time
Mid-scale Transition Glitch
Energy
Full-scale settling
Test Conditions
Min
2
8
Typ
Max
Unit
V/µs
µs
40
nV-S
Note 1:
Note 2:
Note 3:
Note 4:
Linearity is defined from code 64 to 4095 (ICM7361)
Linearity is defined from code 16 to 1023 (ICM7341)
Linearity is defined from code 4 to 255 (ICM7321)
Guaranteed by design; not tested in production
See Applications Information
All digital inputs are either at GND or V
DD
TIMING CHARACTERISTICS
(V
DD
= 2.7V to 5.5V; all specifications T
MIN
to T
MAX
unless otherwise noted)
Symbol
t
1
t
2
t
3
t
4
t
5
Parameter
SCK Cycle Time
Data Setup Time
Data Hold Time
SCK Falling edge to CS
Rising Edge
CS Falling Edge to SCK
Rising Edge
(Note 2)
t
6
CS Pulse Width
20
ns
Test Conditions
(Note 2)
(Note 2)
(Note 2)
(Note 2)
(Note 2)
15
ns
Min
30
10
10
0
Typ
Max
ns
ns
ns
ns
Unit
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
4
ICmic
SCK
IC MICROSYSTEMS
ICM7361/7341/7321
SINGLE 12/10/8-
BIT
V
OLTAGE
-O
UTPUT
DAC
S
t
1
t
3
t
2
SDI
C3
C2
MSB
t
5
Input Word for DAC N
t
4
CS
t
6
Figure 1:
Serial Interface Timing Diagram
CONTENTS OF INPUT SHIFT REGISTER
ICM7361 (12-Bit DAC)
MSB
C3
C2
C1
C0
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
LSB
D0
Figure 2:
Contents of ICM7361 Input Shift Register
ICM7341 (10-Bit DAC)
MSB
C3
C2
C1
C0
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
LSB
X
Figure 3:
Contents of ICM7341 Input Shift Register
ICM7321 (8-Bit DAC)
MSB
C3
C2
C1
C0
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
LSB
X
Figure 4:
Contents of ICM7321 Input Shift Register
C3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
C2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
C1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
C0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
DATA
Data
Data
Data
X
X
X
X
X
X
X
X
X
X
X
X
X
FUNCTION
Load Input Latch
Update DAC
Load Input Latch and Update DAC
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
No Operation
Table 1:
Serial Interface Control Command
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
5
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