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PDF MAX5190 Data sheet ( Hoja de datos )
| Número de pieza | MAX5190 | |
| Descripción | 8-Bit / 40MHz / Current / Voltage-Output DACs | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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19-1582; Rev 2; 12/01
8-Bit, 40MHz, Current/Voltage-Output DACs
General Description
The MAX5187 is an 8-bit, current-output digital-to-ana-
log converter (DAC) designed for superior performance
in signal reconstruction or arbitrary waveform genera-
tion applications requiring analog signal reconstruction
with low distortion and low-power operation. The volt-
age-output MAX5190 provides equal specifications,
with on-chip precision resistors for voltage output oper-
ation. Both devices are designed for a 10pVs glitch
operation to minimize unwanted spurious signal com-
ponents at the output. An on-board +1.2V bandgap cir-
cuit provides a well-regulated, low-noise reference that
can be disabled for external reference operation.
The MAX5187/MAX5190 are designed to provide a high
level of signal integrity for the least amount of power
dissipation. They operate from a single supply of +2.7V
to +3.3V. Additionally, these DACs have three modes of
operation: normal, low-power standby, and full shut-
down, which provides the lowest possible power dissi-
pation with a 1µA (max) shutdown current. A fast
wake-up time (0.5µs) from standby mode to full DAC
operation allows for power conservation by activating
the DAC only when required.
The MAX5187/MAX5190 are packaged in a 24-pin
QSOP and are specified for the extended (-40°C to
+85°C) temperature range. For higher resolution, 10-bit
versions, see the MAX5181/MAX5184 data sheet.
Applications
Signal Reconstruction
Digital Signal Processing
Arbitrary Waveform Generation (AWG)
Imaging Applications
Features
o +2.7V to +3.3V Single-Supply Operation
o Wide Spurious-Free Dynamic Range:
70dB at fOUT = 2.2MHz
o Fully Differential Output
o Low-Current Standby or Full Shutdown Modes
o Internal +1.2V Low-Noise Bandgap Reference
o Small 24-Pin QSOP Package
PART
MAX5187BEEG
MAX5190BEEG
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
24 QSOP
24 QSOP
Pin Configuration
TOP VIEW
CREF 1
OUTP 2
OUTN 3
AGND 4
AVDD 5
DACEN 6
PD 7
CS 8
CLK 9
REN 10
DGND 11
DGND 12
MAX5187
MAX5190
QSOP
24 REFO
23 REFR
22 DGND
21 DVDD
20 D7
19 D6
18 D5
17 D4
16 D3
15 D2
14 D1
13 D0
________________________________________________________________ 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.
1 page  
8-Bit, 40MHz, Current/Voltage-Output DACs
Typical Operating Characteristics (continued)
(AVDD = DVDD = +3V, AGND = DGND = 0, 400Ω differential output, IFS = 1mA, CL = 5pF, TA = +25°C, unless otherwise noted.)
SHUTDOWN CURRENT
vs. TEMPERATURE
0.13
INTERNAL REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
1.28
INTERNAL REFERENCE VOLTAGE
vs. TEMPERATURE
1.28
0.11 1.27 1.27
0.09
MAX5190
0.07 MAX5187
0.05
1.26
MAX5190
1.25 MAX5187
1.24
1.26
MAX5187
1.25
MAX5190
1.24
0.03
-40
4
-15 10 35
60
TEMPERATURE (°C)
OUTPUT CURRENT
vs. REFERENCE CURRENT
85
1.23
2.5
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
DYNAMIC RESPONSE RISE TIME
1.23
-40
-15 10 35
60
TEMPERATURE (°C)
85
DYNAMIC RESPONSE FALL TIME
3
2
1
0
0 100 200 300 400 500
REFERENCE CURRENT (µA)
SETTLING TIME
12.5ns/div
50ns/div
OUTP
150mV/
div
OUTN
150mV/
div
50ns/div
OUTN
100mV/
div
OUTP
100mV/
div
FFT PLOT
0
-10 fOUT = 2.2MHz
-20 fCLK = 40MHz
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0 2 4 6 8 10 12 14 16 18 20
OUTPUT FREQUENCY (MHz)
OUTP
150mV/
div
OUTN
150mV/
div
_______________________________________________________________________________________ 5
5 Page 
8-Bit, 40MHz, Current/Voltage-Output DACs
Outputs
The MAX5187 output is designed to supply full-scale
output currents of 1mA into 400Ω loads in parallel with
a capacitive load of 5pF. The MAX5190 features inte-
grated 400Ω resistors that restore the array current to
proportional, differential voltages of 400mV. These dif-
ferential output voltages can then be used to drive a
balun transformer or a low-distortion, high-speed oper-
ational amplifier to convert the differential voltage into a
single-ended voltage.
Applications Information
Static and Dynamic
Performance Definitions
Integral Nonlinearity
Integral nonlinearity (INL) (Figure 5a) is the deviation of
the values on an actual transfer function from either a
best-straight-line fit (closest approximation to the actual
transfer curve) or a line drawn between the endpoints
of the transfer function once offset and gain errors have
been nullified. For a DAC, the deviations are measured
every single step.
Differential Nonlinearity
Differential nonlinearity (DNL) (Figure 5b) is the differ-
ence between an actual step height and the ideal value
of 1LSB. A DNL error specification of less than 1LSB
guarantees no missing codes and a monotonic transfer
function.
Offset Error
Offset error (Figure 5c) is the difference between the
ideal and the actual offset point. For a DAC, the offset
point is the step value when the digital input is zero.
This error affects all codes by the same amount and
can usually be compensated by trimming.
7
6
5
4
AT STEP
3 011 (1/2 LSB )
2
AT STEP
1 001 (1/4 LSB )
0
000 001 010 011 100 101 110 111
DIGITAL INPUT CODE
Figure 5a. Integral Nonlinearity
6
5 1 LSB
4 DIFFERENTIAL LINEARITY
ERROR (-1/4 LSB)
3
1 LSB
2
1
DIFFERENTIAL
LINEARITY ERROR (+1/4 LSB)
0
000
001 010 011 100
DIGITAL INPUT CODE
101
Figure 5b. Differential Nonlinearity
3 ACTUAL
DIAGRAM
2
IDEAL DIAGRAM
1
ACTUAL
OFFSET
POINT
OFFSET ERROR
(+1 1/4 LSB)
IDEAL OFFSET
0 POINT
000 001 010
DIGITAL INPUT CODE
Figure 5c. Offset Error
011
IDEAL FULL-SCALE OUTPUT
7
GAIN ERROR
(-1 1/4 LSB)
6
IDEAL DIAGRAM
5 ACTUAL
FULL-SCALE
OUTPUT
4
0
000 100
101 110
DIGITAL INPUT CODE
Figure 5d. Gain Error
111
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX5190.PDF ] | |
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