MAX5180BEEI+ Maxim Integrated Products, MAX5180BEEI+ Datasheet - Page 8

• Manufacturer Part Number: MAX5180BEEI+
• Description: IC DAC 10BIT 40MHZ DUAL 28-QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5180BEEI+

• Settling Time: 25µs
• Number Of Bits: 10
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QSOP
• Number Of Dac Outputs: 2
• 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
• Maximum Power Dissipation: 725 mW
• Minimum Operating Temperature: - 40 C
• Supply Current: 4.2 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Dual, 10-Bit, 40MHz, Current/Voltage
Simultaneous-Output DACs
Figure 1. Functional Diagram
The MAX5180/MAX5183 are dual, 10-bit digital-to-ana-
log converters (DACs) capable of operating with clock
speeds up to 40MHz. Each of these dual converters
consists of separate input and DAC registers, followed
by a current source array capable of generating up to
1.5mA full-scale output current (Figure 1). An integrat-
ed 1.2V voltage reference and control amplifier deter-
mine the data converters’ full-scale output currents/
voltages. Careful reference design ensures close gain
matching and excellent drift characteristics. The
MAX5183’s voltage output operation features matched
400Ω on-chip resistors that convert the current array
current into a voltage.
The MAX5180/MAX5183 provide an integrated
50ppm/°C, 1.2V, low-noise bandgap reference that can
be disabled and overridden by an external reference
voltage. REFO serves either as an external reference
input or an integrated reference output. If REN is con-
nected to AGND, the internal reference is selected and
REFO provides a 1.2V output. Due to its limited 10µA
8
*INTERNAL 400Ω AND 9.6kΩ
Internal Reference and Control Amplifier
RESISTORS FOR MAX5183 ONLY.
_______________________________________________________________________________________
CLK
REFO
REFR
Detailed Description
*
9.6k
1.2V REF
REN
MSB DECODE
LATCHES
LATCHES
OUTPUT
INPUT
AV
DAC 1 SWITCHES
DAC 2 SWITCHES
DD
D9–D0
SOURCE ARRAY
CURRENT-
AGND
MSB DECODE
LATCHES
LATCHES
OUTPUT
INPUT
output drive capability, REFO must be buffered with an
external amplifier, if heavier loading is required.
The MAX5180/MAX5183 also employ a control amplifier
designed to simultaneously regulate the full-scale out-
put current (I
output current is calculated as follows:
where I
V
R
amplifier’s output current on the MAX5180 (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 MAX5183 converts each output current (DAC1 and
DAC2) into an output voltage (V
internal, ground-referenced 400Ω load resistors. Using
the internal 1.2V reference voltage, the MAX5183’s inte-
grated reference output current resistor (R
sets I
REFO/
SET
REF
CS
is the reference resistor that determines the
R
REF
SET
to 125µA and I
DACEN
) and I
is the reference output current (I
FS
DV
MAX5180
MAX5183
DD
) for both outputs of the devices. The
FS
PD
I
DGND
FS
is the full-scale output current.
FS
= 8 × I
to 1mA.
OUT1N
CREF1
CREF2
OUT1P
OUT2P
OUT2N
REF
OUT1
, V
OUT2
SET
) with two
= 9.6kΩ)
REF
=