D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
19-2317; Rev 0; 1/02
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
General Description
The MAX5842 is a quad, 12-bit voltage-output, digital-
to-analog converter (DAC) with an I
2
C
™
-compatible,
2-wire interface that operates at clock rates up to
400kHz. The device operates from a single 2.7V to 5.5V
supply and draws only 230µA at V
DD
= 3.6V. A power-
down mode decreases current consumption to less
than 1µA. The MAX5842 features three software-selec-
table power-down output impedances: 100kΩ, 1kΩ,
and high impedance. Other features include internal
precision Rail-to-Rail
®
output buffers and a power-on
reset (POR) circuit that powers up the DAC in the
100kΩ power-down mode.
The MAX5842 features a double-buffered I
2
C-compati-
ble serial interface that allows multiple devices to share
a single bus. All logic inputs are CMOS-logic compati-
ble and buffered with Schmitt triggers, allowing direct
interfacing to optocoupled and transformer-isolated
interfaces. The MAX5842 minimizes digital noise
feedthrough by disconnecting the clock (SCL) signal
from the rest of the device when an address mismatch
is detected.
The MAX5842 is specified over the extended tempera-
ture range of -40°C to +85°C and is available in a
miniature 10-pin µMAX package. Refer to the MAX5841
data sheet for the 10-bit version.
o
Ultra-Low Supply Current
230µA at V
DD
= 3.6V
280µA at V
DD
= 5.5V
o
300nA Low-Power Power-Down Mode
o
Single 2.7V to 5.5V Supply Voltage
o
Fast 400kHz I
2
C-Compatible 2-Wire Serial
Interface
o
Schmitt-Trigger Inputs for Direct Interfacing to
Optocouplers
o
Rail-to-Rail Output Buffer Amplifiers
o
Three Software-Selectable Power-Down Output
Impedances
100kΩ, 1kΩ, and High Impedance
o
Read-Back Mode for Bus and Data Checking
o
Power-On Reset to Zero
o
10-Pin µMAX Package
Features
MAX5842
Ordering Information
PART
MAX5842LEUB
TEMP
RANGE
PIN-
PACKAGE
ADDRESS
0111 10X
1011 10X
Applications
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Powered Equipment
ATE
-40
o
C to +85
o
C 10 µMAX
MAX5842MEUB -40
o
C to +85
o
C 10 µMAX
Typical Operating Circuit
V
DD
µC
SDA
V
DD
SCL
R
P
R
P
Pin Configuration
TOP VIEW
ADD 1
SCL
V
DD
GND
SDA
2
3
4
5
10 OUTD
9
OUTC
OUTB
OUTA
REF
R
S
SCL
R
S
SDA
MAX5842
REF
V
DD
OUTA
OUTB
OUTC
OUTD
MAX5842
8
7
6
R
S
SCL
R
S
SDA
REF
MAX5842
V
DD
OUTA
OUTB
OUTC
OUTD
µMAX
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I
2
C is a trademark of Philips Corp.
REF
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
MAX5842
ABSOLUTE MAXIMUM RATINGS
V
DD
, SCL, SDA to GND ............................................-0.3V to +6V
OUT_, REF, ADD to GND..............................-0.3V to V
DD
+ 0.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
10-Pin µMAX (derate 5.6mW above +70°C) .................444mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Maximum Junction Temperature .....................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, GND = 0, V
REF
= V
DD
, R
L
= 5kΩ, C
L
= 200pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at V
DD
= +5V, T
A
= +25°C.) (Note 1)
PARAMETER
STATIC ACCURACY (NOTE 2)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Zero-Code Error
Zero-Code Error Tempco
Gain Error
Gain-Error Tempco
Power-Supply Rejection Ratio
DC Crosstalk
REFERENCE INPUT
Reference Input Voltage Range
Reference Input Impedance
Reference Current
DAC OUTPUT
Output Voltage Range
DC Output Impedance
Short-Circuit Current
Wake-Up Time
DAC Output Leakage Current
DIGITAL INPUTS (SCL, SDA)
Input High Voltage
Input Low Voltage
V
IH
V
IL
0.7
✕
V
DD
0.3
✕
V
DD
V
V
No load (Note 4)
Code = 800 hex
V
DD
= 5V, V
OUT
= full scale (short to GND)
V
DD
= 3V, V
OUT
= full scale (short to GND)
V
DD
= 5V
V
DD
= 3V
Power-down mode = high impedance,
V
DD
= 5.5V, V
OUT
_ = V
DD
or GND
0
1.2
42.2
15.1
8
8
±0.1
±1
V
DD
V
Ω
mA
µs
µA
Power-down mode
V
REF
0
32
45
±0.3
±1
V
DD
V
kΩ
µA
PSRR
Code = FFF hex, V
DD
= 4.5V to 5.5V
GE
Code = FFF hex
N
INL
DNL
ZCE
(Note 3)
Guaranteed monotonic (Note 3)
Code = 000 hex, V
DD
= 2.7V
6
2.3
-0.8
0.26
58.8
30
-3
12
±2
±16
±1
40
Bits
LSB
LSB
mV
ppm/
o
C
%FSR
ppm/
o
C
dB
µV
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, GND = 0, V
REF
= V
DD
, R
L
= 5kΩ, C
L
= 200pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at V
DD
= +5V, T
A
= +25°C.) (Note 1)
PARAMETER
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUT (SDA)
Output Logic Low Voltage
Three-State Leakage Current
Three-State Output Capacitance
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Voltage Output Settling Time
Digital Feedthrough
Digital-to-Analog Glitch Impulse
DAC-to-DAC Crosstalk
POWER SUPPLIES
Supply Voltage Range
Supply Current with No Load
Power-Down Supply Current
Serial Clock Frequency
Bus Free Time Between STOP
and START Conditions
START Condition Hold Time
SCL Pulse Width Low
SCL Pulse Width High
Repeated START Setup Time
Data Hold Time
Data Setup Time
SDA and SCL Receiving Rise
Time
SDA and SCL Receiving Fall Time
SDA Transmitting Fall Time
STOP Condition Setup Time
V
DD
I
DD
I
DDPD
f
SCL
t
BUF
t
HD,STA
t
LOW
t
HIGH
t
SU,STA
t
HD,DAT
t
SU,DAT
t
r
t
f
t
f
t
SU,STO
(Note 5)
(Note 5)
(Note 5)
All digital inputs at 0 or V
DD
= 3.6V
All digital inputs at 0 or V
DD
= 5.5V
All digital inputs at 0 or V
DD
= 5.5V
0
1.3
0.6
1.3
0.6
0.6
0
100
0
0
20 +
0.1C
b
0.6
300
300
250
0.9
2.7
230
280
0.3
5.5
395
420
1
400
V
µA
µA
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
ns
µs
SR
To 1/2LSB code 400 hex to C00 hex or C00
hex to 400 hex (Note 5)
Code = 000 hex, digital inputs from 0 to V
DD
Major carry transition (code = 7FF hex to
800 hex and 800 hex to 7FF hex)
0.5
4
0.2
12
2.4
12
V/µs
µs
nV-s
nV-s
nV-s
V
OL
I
L
I
SINK
= 3mA
Digital inputs = 0 or V
DD
±0.1
6
0.4
±1
V
µA
pF
Digital inputs = 0 or V
DD
SYMBOL
CONDITIONS
MIN
0.05
✕
V
DD
±0.1
6
±1
TYP
MAX
UNITS
V
µA
pF
MAX5842
TIMING CHARACTERISTICS (FIGURE 1)
_______________________________________________________________________________________
3
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
MAX5842
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, GND = 0, V
REF
= V
DD
, R
L
= 5kΩ, C
L
= 200pF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are
at V
DD
= +5V, T
A
= +25°C.) (Note 1)
PARAMETER
Bus Capacitance
Maximum Duration of Suppressed
Pulse Widths
SYMBOL
C
b
t
SP
(Note 5)
0
CONDITIONS
MIN
TYP
MAX
400
50
UNITS
pF
ns
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
All devices are 100% production tested at T
A
= +25°C and are guaranteed by design for T
A
= T
MIN
to T
MAX
.
Static specifications are tested with the output unloaded.
Linearity is guaranteed from codes 115 to 3981.
Offset and gain error limit the FSR.
Guaranteed by design. Not production tested.
Typical Operating Characteristics
(V
DD
= +5V, R
L
= 5kΩ.)
INTEGRAL NONLINEARITY
vs. INPUT CODE
3
2
INL (LSB)
INL (LSB)
INL (LSB)
1
0
-1
-2
-3
-4
0
1024
2048
INPUT CODE
3072
4096
0
2.7
3.4
4.1
4.8
5.5
SUPPLY VOLTAGE (V)
0
-40
-15
10
35
60
85
TEMPERATURE (°C)
3
3
MAX5842 toc01
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX5842 toc02
INTEGRAL NONLINEARITY
vs. TEMPERATURE
MAX5842 toc03
4
5
5
4
4
2
2
1
1
DIFFERENTIAL NONLINEARITY
vs. INPUT CODE
0.75
0.50
DNL (LSB)
DNL (LSB)
0.25
0
-0.25
-0.50
-0.75
-1.00
0
1024
2048
INPUT CODE
3072
4096
-1.00
2.7
-0.75
MAX5842 toc04
DIFFERENTIAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX5842 toc05
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
MAX5842 toc06
1.00
0
0
-0.25
DNL (LSB)
3.4
4.1
4.8
5.5
-0.25
-0.50
-0.50
-0.75
-1.00
-40
-15
10
35
60
85
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
4
_______________________________________________________________________________________
模拟与混合信号
