MAX5184BEEG+ Maxim Integrated Products, MAX5184BEEG+ Datasheet - Page 8

• Manufacturer Part Number: MAX5184BEEG+
• Description: IC DAC 10BIT DUAL 40MHZ 24-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5184BEEG+

• Settling Time: 25µs
• Number Of Bits: 10
• Data Interface: Parallel
• Number Of Converters: 1
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Resolution: 10 bit
• Interface Type: Parallel
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

10-Bit, 40MHz, Current/Voltage-Output DACs
The MAX5181/MAX5184 are 10-bit digital-to-analog con-
verters (DACs) capable of operating with clock speeds
up to 40MHz. Each converter consists of separate input
and DAC registers, followed by a current source array
capable of generating up to 1.5mA full-scale output cur-
rent (Figure 1). An integrated 1.2V voltage reference and
control amplifier determine the data converters’ full-scale
output currents/voltages. Careful reference design
ensures close gain matching and excellent drift charac-
teristics. The MAX5184’s voltage output operation fea-
tures matched 400Ω on-chip resistors that convert the
current-array current into a voltage.
The MAX5181/MAX5184 provide an integrated 50ppm/°C,
1.2V, low-noise bandgap reference that can be dis-
abled and overridden by an external reference voltage.
REFO serves either as an external reference input or an
integrated reference output. If REN is connected to
DGND, the internal reference is selected and REFO
8
Figure 1. Functional Diagram
*INTERNAL 400Ω AND 9.6kΩ
_______________________________________________________________________________________
RESISTORS FOR MAX5184 ONLY.
Detailed Description
Internal Reference and
REFO
REFR
CLK
Control Amplifier
9.6kΩ*
1.2V REF
REN
LATCHES
LATCHES
DECODE
OUTPUT
INPUT
MSB
AV
DAC SWITCHES
DD
D9–D0
provides a 1.2V output. Due to its limited 10µA output
drive capability, REFO must be buffered with an exter-
nal amplifier, if heavier loading is required.
The MAX5181/MAX5184 also employ a control amplifier
designed to regulate simultaneously the full-scale out-
put current (I
output current is calculated as follows:
where I
V
R
amplifier’s output current on the MAX5181 (Figure 2).
This current is mirrored into the current source array,
where it is equally distributed between matched current
segments and summed to valid output current readings
for the DACs.
The MAX5184 converts this output current into a differ-
ential output voltage (V
referenced 400Ω load resistors. Using the internal 1.2V
reference voltage, the MAX5184’s integrated
SOURCE ARRAY
REFO
SET
CURRENT-
AGND
LATCHES
LATCHES
OUTPUT
INPUT
DECODE
is the reference resistor that determines the
MSB
/R
REF
SET
CS
) and I
is the reference output current (I
FS
) for both outputs of the devices. The
DACEN
400Ω*
DV
MAX5181
MAX5184
FS
DD
I
FS
is the full-scale output current.
OUT
400Ω*
= 8
DGND
PD
) with two internal, ground-

I
REF
OUTN
CREF
OUTP
REF
=