DAC8728_14 Datasheet, PDF (8/56 Pages) Texas Instruments – Octal, 16-Bit, Low-Power, High-Voltage Output, Parallel Input DIGITAL-TO-ANALOG CONVERTER

DAC8728
SBAS466A – JUNE 2009 – REVISED NOVEMBER 2009
www.ti.com
ELECTRICAL CHARACTERISTICS: Single-Supply (continued)
All specifications at T_A = T_MIN to T_MAX, AV_DD = +32V, AV_SS = 0V, DV_DD = +5V, REF-A and REF-B = +5V, gain = 6, AGND-x =
DGND = 0V, and OFFSET-A = OFFSET-B = AGND, unless otherwise noted.
DAC8728
PARAMETER
Channel-to-channel isolation⁽⁸⁾
DAC-to-DAC crosstalk⁽⁹⁾
Digital crosstalk⁽¹⁰⁾
Digital feedthrough⁽¹¹⁾
CONDITIONS
V_REF = 4V_PP, f = 1kHz
DACs in the same group
DACs among different groups
MIN
TYP
88
10
1
1
1
MAX
UNIT
dB
nV-s
nV-s
nV-s
nV-s
T_A = +25°C at 10kHz, gain = 6
Output noise
T_A = +25°C at 10kHz, gain = 4
0.1Hz to 10Hz, gain = 6
Power-supply rejection⁽¹²⁾
AV_DD = +33V to +36V
ANALOG MONITOR PIN (V_MON)
Output impedance⁽¹³⁾
T_A = +25°C
Three-state leakage current
200
130
20
0.05
2000
100
nV/√Hz
nV/√Hz
μV_PP
LSB
Ω
nA
REFERENCE INPUT
Reference input voltage
range ⁽¹⁴⁾
1.0
5.5
V
Reference input dc impedance
10
MΩ
Reference input capacitance
DIGITAL INPUT⁽¹⁵⁾
10
pF
High-level input voltage, V_IH
Low-level input voltage, V_IL
Input current
IOV_DD = +4.5V to +5.5V
IOV_DD = +2.7V to +3.3V
IOV_DD = +1.7V to 2.0V
IOV_DD = +4.5V to +5.5V
IOV_DD = +2.7V to +3.3V
IOV_DD = +1.7V to 2.0V
CLR, LDAC, RST, A0 to A4, R/W, and CS
USB/BTC, RSTSEL, and D0 to D15, and GPIO
3.8
2.3
1.5
–0.3
–0.3
–0.3
0.3 + IOV_DD
V
0.3 + IOV_DD
V
0.3 + IOV_DD
V
0.8
V
0.6
V
0.3
V
±1
μA
±5
μA
CLR, LDAC, RST, A0 to A4, R/W, and CS
5
pF
Input capacitance
USB/BTC, RSTSEL, and D0 to D15
12
pF
DIGITAL OUTPUT⁽¹⁵⁾
GPIO
14
pF
High-level output voltage, V_OH
(D0 to D15)
IOV_DD = +2.7V to +5.5V, sourcing 1mA
IOV_DD = +1.8V, sourcing 200μA
Low-level output voltage, V_OL
(D0 to D15, BUSY, and GPIO)
IOV_DD = +2.7V to +5.5V, sinking 1mA
IOV_DD = +1.8V, sinking 200μA
High-impedance leakage current D0 to D13, BUSY, and GPIO
IOV_DD – 0.4
1.6
0
0
IOV_DD
V
IOV_DD
V
0.4
V
0.2
V
±5
μA
High-impedance output
capacitance
BUSY and GPIO
14
pF
(8) Channel-to-channel isolation refers to the ratio of the signal amplitude at the output of one DAC channel to the amplitude of the
sinusoidal signal on the reference input of another DAC channel. It is expressed in dB and measured at midscale.
(9) DAC-to-DAC crosstalk is the glitch impulse that appears at the output of one DAC as a result of both the full-scale digital code and
subsequent analog output change at another DAC. It is measured with LDAC tied low and expressed in nV-s.
(10) Digital crosstalk is the glitch impulse transferred to the output of one converter as a result of a full-scale code change in the DAC input
register of another converter. It is measured when the DAC output is not updated, and is expressed in nV-s.
(11) Digital feedthrough is the glitch impulse injected to the output of a DAC as a result of a digital code change in the DAC input register of
the same DAC. It is measured with the full-scale digital code change without updating the DAC output, and is expressed in nV-s.
(12) The analog output must not be greater than (AV_DD – 0.5V).
(13) 8000Ω when V_MON is connected to Reference Buffer A or B.
(14) Reference input voltage ≤ DV_DD.
(15) Specified by design.
8
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