The ICM7373, ICM7353 and ICM7333 are Dual 12-Bit, 10-
Bit and 8-Bit Rail-to-Rail voltage output DACs respectively,
with guaranteed monotonic behavior. These DACs are
available in 16 Lead QSOP package. They include
adjustable output gain for ease of use and flexibility. The
reference output is available on a separate pin 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
and Microwire compatible interface. The DAC has a
double buffered digital input. And there is a serial data
output port to allow daisy-chaining applications.
BLOCK DIAGRAM
REFB
REFA
ICM7373/7353/7333
INPUT AND DAC LATCH
DAC A
+
-
INPUT AND DAC LATCH
DAC B
VOA
FBA
+
-
VOB
FBB
REFERENCE
REFOUT
INPUT CONTROL LOGIC, REGISTERS AND LATCHES
SDO
SDI
SCK
CS
CLR
Rev. A1
ICmic reserves the right to change the specifications without prior notice.
1
ICmic
PACKAGE
IC MICROSYSTEMS
Dual 12/10/8-Bit Voltage Output DACs
Serial Interface with Adjustable Output Gain
ICM7373/7353/7333
16 Lead QSOP
AGND
VOA
FBA
REFA
CLR
CS
SDI
SCK
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
VOB
FBB
REFB
N/C
REFOUT
SDO
DGND
TOP VIEW
PIN DESCRIPTION (16 Lead QSOP)
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
AGND
VOA
FBA
REFA
CLR
CS
SDI
SCK
DGND
SDO
REFOUT
N/C
REFB
FBB
VOB
VDD
I/O
I
O
I
I
I
I
I
I
I
O
O
-
I
I
O
I
Analog Ground
DAC A Output Voltage
Description
Inverting Input of The Output Amplifier DAC A. Output Amplifier Feedback Input.
Reference Voltage Input for DAC A
Active Low Clear Input (CMOS). Resets All Registers to Zero. DAC outputs go to 0 V
Active Low Chip Select (CMOS)
Serial Data Input (CMOS)
Serial Clock Input (CMOS)
Digital Ground
Serial Data Output
Reference Output
No Connection
Reference Voltage Input for DAC B
Inverting Input of The Output Amplifier DAC B. Output Amplifier Feedback Input.
DAC B Output Voltage
Supply Voltage
Rev. A1
ICmic reserves the right to change the specifications without prior notice.
2
ICmic
Symbol
V
DD
I
IN
V
IN_
V
IN_REF
T
STG
T
SOL
IC MICROSYSTEMS
Dual 12/10/8-Bit Voltage Output DACs
Serial Interface with Adjustable Output Gain
ICM7373/7353/7333
ABSOLUTE MAXIMUM RATING
Parameter
Supply Voltage
Input Current
Digital Input Voltage (SCK, SDI, CS , CLR )
Reference Input Voltage
Storage Temperature
Soldering Temperature
Value
-0.3 to 7.0
+/- 25.0
-0.3 to 7.0
-0.3 to 7.0
-65 to +150
300
Unit
V
mA
V
V
o
o
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.
ORDERING INFORMATION
Part
ICM7373
ICM7353
ICM7333
Operating Temperature Range
-40
o
C to 85
o
C
-40 C to 85 C
-40 C to 85 C
o
o
o
o
Package
16-Pin QSOP
16-Pin QSOP
16-Pin QSOP
DC ELECTRICAL CHARACTERISTICS
(V
DD
= 2.7V to 5.5V; V
OUT
unloaded; all specifications T
MIN
to T
MAX
unless otherwise noted)
Symbol
DC PERFORMANCE
ICM7373
N
DNL
INL
ICM7353
N
DNL
INL
ICM7333
N
DNL
INL
Resolution
Differential Nonlinearity
Integral Nonlinearity
(Notes 1 & 3)
(Notes 1 & 3)
8
0.05
0.25
+1.0
+0.75
Bits
LSB
LSB
% of
FS
mV
Resolution
Differential Nonlinearity
Integral Nonlinearity
(Notes 1 & 3)
(Notes 1 & 3)
10
0.1
1.0
+1.0
+3.0
Bits
LSB
LSB
Resolution
Differential Nonlinearity
Integral Nonlinearity
(Notes 1 & 3)
(Notes 1 & 3)
12
0.4
4.0
+1.0
+12.0
Bits
LSB
LSB
Parameter
Test Conditions
Min
Typ
Max
Unit
GE
OE
Gain Error
Offset Error
+0.5
+25
POWER REQUIREMENTS
V
DD
I
DD
Supply Voltage
Supply Current
2.7
0.6
3.6
1.5
V
mA
Rev. A1
ICmic reserves the right to change the specifications without prior notice.
3
ICmic
Symbol
IC MICROSYSTEMS
Dual 12/10/8-Bit Voltage Output DACs
Serial Interface with Adjustable Output Gain
ICM7373/7353/7333
Parameter
Test Conditions
Min
Typ
Max
Unit
OUTPUT CHARACTERISTICS
Output Voltage Range
VO
SC
R
OUT
Short Circuit Current
Amp Output Impedance
Output Line Regulation
LOGIC INPUTS
V
IH
V
IL
Digital Input High
Digital Input Low
Digital Input Leakage
REFERENCE
V
REFOUT
Reference Output
Reference Output Line
Regulation
1.2
1.25
0.8
1.3
4.0
V
mV/V
(Note 2)
(Note 2)
2.4
0.8
5
V
V
µΑ
At Mid-scale (Note 2)
At 0-scale (Note 2)
V
DD
=2.7 to 3.6 V
(Note 3)
0
60
1.0
100
0.4
V
DD
150
5.0
200
3.0
V
mA
Ω
Ω
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
Test Conditions
Min
Typ
2
8
40
Max
Unit
V/µs
µs
nV-S
Note 1:
Note 2:
Note 3:
Linearity is defined from code 64 to 4095 (ICM7373)
Linearity is defined from code 16 to 1023 (ICM7353)
Linearity is defined from code 4 to 255 (ICM7333)
Guaranteed by design; not tested in production
See Applications Information
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
t
6
Parameter
SCK Cycle Time
Data Setup Time
Data Hold Time
SCK Falling edge to CS Rising Edge
CS Falling Edge to SCK Rising Edge
CS Pulse Width
Test
Conditions
(Note 2)
(Note 2)
(Note 2)
(Note 2)
(Note 2)
(Note 2)
Min
30
10
10
0
15
20
Typ
Max
Unit
ns
ns
ns
ns
ns
ns
Rev. A1
ICmic reserves the right to change the specifications without prior notice.
4
ICmic
IC MICROSYSTEMS
Dual 12/10/8-Bit Voltage Output DACs
Serial Interface with Adjustable Output Gain
ICM7373/7353/7333
t
6
CS
t
1
t
4
t
5
SCK
t
2
SDI
C3
D0
t
3
DAC INPUT WORD
Figure 1.
Serial Interface Timing Diagram
Rev. A1
ICmic reserves the right to change the specifications without prior notice.
