DAC8718 Datasheet, PDF (8/60 Pages) Texas Instruments – Octal, 16-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER

DAC8718
SBAS467A – MAY 2009 – REVISED DECEMBER 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, IOV_DD = DV_DD = +5V, REF-A and REF-B = +5V, gain = 6,
AGND-x = DGND = 0V, data format = straight binary, and OFFSET-A = OFFSET-B = AGND, unless otherwise noted.
DAC8718
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
DAC-to-DAC crosstalk⁽¹⁰⁾
Digital crosstalk⁽¹¹⁾
Digital feedthrough⁽¹²⁾
DACs in the same group
DACs among different groups
10
nV-s
1
nV-s
1
nV-s
1
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⁽¹³⁾
AV_DD = +33V to +36V
ANALOG MONITOR PIN (V_MON)
Output impedance⁽¹⁴⁾
T_A = +25°C
Three-state leakage current
200
130
20
0.05
2
100
nV/√Hz
nV/√Hz
μV_PP
LSB
kΩ
nA
AUXILIARY ANALOG INPUT
Input range
Input impedance
(AIN-x to V_MON)
Input capacitance⁽¹⁵⁾
T_A = +25°C
AV_SS
AV_DD
V
2
kΩ
4
pF
Input leakage current
30
nA
REFERENCE INPUT
Reference input voltage
range ⁽¹⁶⁾
1.0
5.5
V
Reference input dc impedance
Reference input capacitance⁽¹⁵⁾
DIGITAL INPUT⁽¹⁵⁾
10
MΩ
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, CS, and SDI
USB/BTC, RSTSEL, and GPIO-n
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, CS, and SDI
5
pF
Input capacitance
USB/BTC and RSTSEL
12
pF
GPIO-n
14
pF
(10) 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.
(11) 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.
(12) 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.
(13) The analog output must not be greater than (AV_DD – 0.5V).
(14) 8kΩ when V_MON is connected to Reference Buffer A or B, and 4kΩ when V_MON is connected to Offset DAC-A or -B.
(15) Specified by design.
(16) Reference input voltage ≤ DV_DD.
8
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