19-1477; Rev 0; 4/99
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
General Description
The MAX5175/MAX5177 low-power, serial, voltage-out-
put, 12-bit digital-to-analog converters (DACs) feature a
precision output amplifier in a space-saving 16-pin
QSOP package. The MAX5175 operates from a single
+5V supply, and the MAX5177 operates from a single
+3V supply. The output amplifier’s inverting input is
available to allow specific gain configurations, remote
sensing, and high output current capability. This makes
the MAX5175/MAX5177 ideal for a wide range of appli-
cations, including industrial process control. Both
devices draw only 260µA of supply current, which
reduces to 1µA in shutdown mode. In addition, the pro-
grammable power-up reset feature allows for a user-
selectable output voltage state of either 0 or midscale.
The 3-wire serial interface is compatible with SPI™,
QSPI™, and MICROWIRE™ standards. An input register
followed by a DAC register provides a double-buffered
input, allowing the registers to be updated independent-
ly or simultaneously with a 16-bit serial word. Additional
features include software and hardware shutdown, shut-
down lockout, a hardware reset pin, and a reference
input capable of accepting DC and offset AC signals.
These devices provide a programmable digital output
pin for added functionality and a serial-data output pin
for daisy-chaining. All logic inputs are TTL/CMOS com-
patible and are internally buffered with Schmitt triggers
to allow direct interfacing to optocouplers.
The MAX5175/MAX5177 incorporate a proprietary on-chip
circuit that keeps the output voltage virtually “glitch free,”
limiting the glitches to a few millivolts during power-up.
Both devices come in 16-pin QSOP packages and are
specified for the extended (-40°C to +85°C) temperature
range. The MAX5171/MAX5173 are 14-bit pin-compatible
upgrades to the MAX5175/MAX5177. For pin-compatible
DACs with an internal reference, see the 13-bit
MAX5132/MAX5133 and 12-bit MAX5122/MAX5123.
o
±1 LSB INL
o
1µA Shutdown Current
o
“Glitch Free” Output Voltage at Power-Up
o
Single-Supply Operation
+5V (MAX5175)
+3V (MAX5177)
o
Full-Scale Output Range
+2.048V (MAX5177, V
REF
= +1.25V)
+4.096V (MAX5175, V
REF
= +2.5V)
o
Rail-to-Rail
®
Output Amplifier
o
Adjustable Output Offset
o
Low THD (-80dB) in Multiplying Operation
o
SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
o
Programmable Shutdown Mode and Power-Up
Reset (0 or midscale)
o
Buffered Output Capable of Driving 4–20mA or
5kΩ || 100pF Loads
o
User-Programmable Digital Output Pin Allows
Serial Control of External Components
o
14-Bit Upgrades Available (MAX5171/MAX5173)
Features
MAX5175/MAX5177
Ordering Information
PART
MAX5175AEEE
MAX5175BEEE
MAX5177AEEE
MAX5177BEEE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
16 QSOP
16 QSOP
16 QSOP
INL
(LSB)
±1
±2
±2
±4
Applications
Digitally Programmable 4–20mA Current Loops
Industrial Process Controls
Digital Offset and Gain Adjustment
Motion Control
Automatic Test Equipment (ATE)
Remote Industrial Controls
µP-Controlled Systems
Functional Diagram appears at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
TOP VIEW
FB 1
OUT 2
RS 3
PDL 4
CLR 5
CS 6
DIN 7
SCLK 8
Pin Configuration
16 V
DD
15 N.C.
14 REF
MAX5175
MAX5177
13 AGND
12 SHDN
11 UPO
10 DOUT
9
DGND
QSOP
1
________________________________________________________________
Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
MAX5175/MAX5177
ABSOLUTE MAXIMUM RATINGS
V
DD
to AGND, DGND ...............................................-0.3V to +6V
AGND to DGND.....................................................-0.3V to +0.3V
Digital Inputs to DGND.............................................-0.3V to +6V
DOUT, UPO to DGND ................................-0.3V to (V
DD
+ 0.3V)
FB, OUT REF to AGND...............................-0.3V to (V
DD
+ 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin QSOP (derate 8mW/°C above +70°C)...............667mW
Operating Temperature Range .............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+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—MAX5175
(V
DD
= +5V ±10%, V
REF
= 2.5V, AGND = DGND, FB = OUT, R
L
= 5kΩ, C
L
= 100pF referenced to ground, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity (Note 1)
Differential Nonlinearity
Offset Error (Note 2)
Gain Error
Power-Supply Rejection Ratio
Output Noise Voltage
Output Thermal Noise Density
REFERENCE INPUT
Reference Input Range
Reference Input Resistance
Reference -3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Plus Distortion
Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS
Output High Voltage
Output Low Voltage
V
OH
V
OL
I
SOURCE
= 2mA
I
SINK
= 2mA
V
DD
- 0.5
0.13
0.4
V
V
V
IH
V
IL
V
HYS
I
IN
C
IN
V
IN
= 0 or V
DD
200
0.001
8
±1
3
0.8
V
V
mV
µA
pF
SINAD
V
REF
R
REF
V
REF
= 0.5Vp-p + 2.5V
DC
, slew-rate limited
V
REF
= 3.6Vp-p + 1.8V
DC
, f = 1kHz,
code = all 0s
V
REF
= 1.4Vp-p + 2.5V
DC
, f = 10kHz,
code = FFF hex
0
18
350
-84
84
V
DD
- 1.4
V
kΩ
kHz
dB
dB
INL
DNL
V
OS
GE
PSRR
f = 100kHz
R
L
=
∞
R
L
= 5kΩ
-0.6
-1.6
10
1
50
MAX5175A
MAX5175B
12
±1
±2
±1
±10
±4
±8
120
Bits
LSB
LSB
mV
LSB
LSB
µV/V
LSBp-p
nV/√Hz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MULTIPLYING-MODE PERFORMANCE
2
_______________________________________________________________________________________
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
ELECTRICAL CHARACTERISTICS—MAX5175 (continued)
(V
DD
= +5V ±10%, V
REF
= 2.5V, AGND = DGND, FB = OUT, R
L
= 5kΩ, C
L
= 100pF referenced to ground, T
A
= T
MIN
to T
MAX
, unless
otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing (Note 3)
Current into FB
Time Required to Exit Shutdown
Digital Feedthrough
POWER SUPPLIES
Positive Supply Voltage
Power-Supply Current (Note 4)
Shutdown Current (Note 4)
TIMING CHARACTERISTICS
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup
Time
SCLK Rise to
CS
Rise Hold
Time
SDI Setup Time
SDI Hold Time
SCLK Rise to DOUT Valid
Propagation Delay
SCLK Fall to DOUT Valid
Propagation Delay
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold Time
CS
Pulse Width High
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
C
LOAD
= 200pF
C
LOAD
= 200pF
10
40
100
100
40
40
40
0
40
0
80
80
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
4.5
0.26
1
5.5
0.35
10
V
mA
µA
CS
= V
DD
; f
SCLK
= 100kHz, V
SCLK
= 5Vp-p
SR
To ±0.5LSB, from 10mV to full-scale
0
-0.1
0
40
1
0.6
12
V
DD
0.1
V/µs
µs
V
µA
µs
nV-s
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5175/MAX5177
_______________________________________________________________________________________
3
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
MAX5175/MAX5177
ELECTRICAL CHARACTERISTICS—MAX5177
(V
DD
= +2.7V to +3.6V, V
REF
= 1.25V, AGND = DGND, FB = OUT, R
L
= 5kΩ, C
L
= 100pF referenced to ground, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
STATIC PERFORMANCE
Resolution
Integral Nonlinearity (Note 5)
Differential Nonlinearity
Offset Error (Note 2)
Gain Error
Power-Supply Rejection Ratio
Output Noise Voltage
Output Thermal Noise Density
REFERENCE
Reference Input Range
Reference Input Resistance
Reference -3dB Bandwidth
Reference Feedthrough
Signal-to-Noise Plus Distortion
Ratio
DIGITAL INPUTS
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS
Output High Voltage
Output Low Voltage
V
OH
V
OL
I
SOURCE
= 2mA
I
SINK
= 2mA
V
DD
- 0.5
0.13
0.4
V
V
V
IH
V
IL
V
HYS
I
IN
C
IN
V
IN
= 0 or V
DD
200
0.001
8
±1
2.2
0.8
V
V
mV
µA
pF
SINAD
V
REF
R
REF
V
REF
= 0.5Vp-p + 1.25V
DC
, slew-rate limited
V
REF
= 1.6Vp-p + 0.8V
DC
, f = 1kHz,
code = all 0s
V
REF
= 0.9Vp-p + 1.25V
DC
, f = 10kHz,
code = FFF hex
0
18
350
-84
78
V
DD
- 1.4
V
kΩ
kHz
dB
dB
INL
DNL
V
OS
GE
PSRR
f = 100kHz
R
L
=
∞
R
L
= 5kΩ
-0.6
-1.6
10
2
50
MAX5177A
MAX5177B
12
±2
±4
±1
±10
±4
±8
120
Bits
LSB
LSB
mV
LSB
LSB
µV/V
LSBp-p
nV/√Hz
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MULTIPLYING-MODE PERFORMANCE
4
_______________________________________________________________________________________
Low-Power, Serial, 12-Bit DACs with
Force/Sense Voltage Output
ELECTRICAL CHARACTERISTICS—MAX5177 (continued)
(V
DD
= +2.7V to +3.6V, V
REF
= 1.25V, AGND = DGND, FB = OUT, R
L
= 5kΩ, C
L
= 100pF referenced to ground, T
A
= T
MIN
to T
MAX
,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DYNAMIC PERFORMANCE
Voltage Output Slew Rate
Output Settling Time
Output Voltage Swing (Note 3)
Current into FB
Time Required to Exit Shutdown
Digital Feedthrough
POWER SUPPLIES
Positive Supply Voltage
Power-Supply Current (Note 4)
Shutdown Current (Note 4)
TIMING CHARACTERISTICS
SCLK Clock Period
SCLK Pulse Width High
SCLK Pulse Width Low
CS
Fall to SCLK Rise Setup
Time
SCLK Rise to
CS
Rise Hold
Time
SDI Setup Time
SDI Hold Time
SCLK Rise to DOUT Valid
Propagation Delay
SCLK Fall to DOUT Valid
Propagation Delay
SCLK Rise to
CS
Fall Delay
CS
Rise to SCLK Rise Hold Time
CS
Pulse Width High
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
t
CP
t
CH
t
CL
t
CSS
t
CSH
t
DS
t
DH
t
DO1
t
DO2
t
CS0
t
CS1
t
CSW
C
LOAD
= 200pF
C
LOAD
= 200pF
10
75
150
150
75
75
60
0
60
0
200
200
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
V
DD
I
DD
2.7
0.26
1
3.6
0.35
10
V
mA
µA
CS
= V
DD
, DIN = 50kHz, f
SCLK
= 100kHz,
V
SCLK
= 3Vp-p
SR
To ±0.5LSB, from 10mV to full-scale
0
-0.1
0
40
1
0.6
12
V
DD
0.1
V/µs
µs
V
µA
µs
nV-s
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX5175/MAX5177
INL guaranteed between codes 16 and 4095.
Offset is measured at the code that comes closest to 10mV.
Accuracy is better than 1LSB for V
OUT
= 10mV to V
DD
- 180mV. Guaranteed by PSR test on end points.
R
L
= open and digital inputs are either V
DD
or DGND.
INL guaranteed between codes 32 and 4095.
_______________________________________________________________________________________
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