MAX5531ETC+ Maxim Integrated Products, MAX5531ETC+ Datasheet - Page 17

• Manufacturer Part Number: MAX5531ETC+
• Description: IC DAC 12BIT SGL ULP 12-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX5531ETC+

• Settling Time: 660µs
• Number Of Bits: 12
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 1.35mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 12-TQFN Exposed Pad
• Number Of Dac Outputs: 1
• Resolution: 12 bit
• Interface Type: Serial (SPI)
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Supply Current: 0.007 mA
• Voltage Reference: Internal
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 5. Transimpedance Configuration for a Voltage-Biased
Current-Output Transducer
Table 4. Unipolar Code Table (Gain = +1)
Figure 4. Programmable Current Source Driving an LED
MSB
1111
1000
1000
0111
0000
0000
REFIN
N
DAC
DAC CONTENTS
REFIN
IS THE NUMERIC VALUE OF THE DAC INPUT CODE.
1111
0000
0000
1111
0001
0000
MAX5530
I
V
LED
BIAS
=
MAX5530
DAC
V
REFIN
4096 × R
TRANSDUCER
1100
0001
0000
1111
0001
0000
______________________________________________________________________________________
DAC
LSB
× N
DAC
FB
+V
I
REF
T
ANALOG OUTPUT
+V
+V
+V
(2048/4096) = +V
+V
R
VOUT
N
OF THE DAC INPUT CODE.
V
REF
REF
REF
BIAS
DAC
REF
VOUT
FB
IS THE NUMERIC VALUE
=
(4095/4096)
(2049/4096)
(2047/4096)
V
0V
(1/4096)
REFIN
V
LED
OUT
4096
= V
× N
V+
2N3904
BIAS
DAC
V
R
OUT
I
LED
+ (I
REF
T
× R)
/ 2
Ultra-Low-Power, 12-Bit,
Figure 6. Self-Biased Two-Electrode Potentiostat Application
Table 5. Bipolar Code Table (Gain = +1)
Figure 7. Unipolar Output Circuit
MSB
1111
1000
1000
0111
0000
0000
REFIN
Voltage-Output DACs
DAC CONTENTS
1111
0000
0000
1111
0000
0000
MAX5530
REF
DAC
DAC
BAND
GAP
MAX5531
1111
0001
0000
1111
0001
0000
LSB
REFOUT
OUT
-V
FB
REF
ANALOG OUTPUT
+V
-V
+V
I
-V
F
REF
(2048/2048) = -V
REF
SENSOR
N
(0 TO 4095 DECIMAL).
V
REF
FB
OUT
A
REF
WE
CE
IS THE DAC INPUT CODE
(2047/2048)
(2047/2048)
=
OUT
R
0V
(1/2048)
C
V
(1/2048)
F
REFIN
L
4096
× N
TO ADC
TO ADC
TO ADC
A
REF
17