DAC2932 Datasheet, PDF (4/30 Pages) Burr-Brown (TI) – DUAL 12-BIT 40MSPS DIGITAL TO ANALOG CONVERTER

DAC2932
SBAS279D − AUGUST 2003 − REVISED JULY 2005
www.ti.com
ELECTRICAL CHARACTERISTICS: I-DAC (continued)
At TA = TMIN to TMAX (typical values are at TA = 25°C), +VA = +3V, +VD = +3V, Update Rate = 40MSPS, IOUTFS = 2mA, RL = 250Ω, CL ≤ 10pF,
GSET = H, and internal reference, unless otherwise noted.
DAC2932
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Reference
Voltage, VREF
Tolerance
+1.14
+1.22
+1.26
V
±30
mV
Voltage drift
−40
ppm/°C
Output current
10
μA
Input resistance
1
MΩ
Input compliance range
Small-signal bandwidth
Digital Inputs(6)
External VREF
+1.22
0.1
V
MHz
Logic coding
Straight binary
Logic high voltage, VIH
Logic low voltage, VIL
Logic high current
+2
+3
V
0
+0.8
V
±1
μA
Logic low current
±1
μA
Input capacitance
5
pF
Power Supply
Analog supply voltage, +VA, +VAV
2.7
3
3.3
V
Digital supply voltage, +VD, +VDV
2.7
3
3.3
V
Analog supply current, IVA
fCLOCK = 25MSPS, digital inputs at 0
4.7
mA
IVA
fCLOCK = 40MSPS, fOUT = 2.2MHz
5.4
mA
IVA
Standby mode
0.4
mA
Digital supply current, IVD
fCLOCK = 25MSPS, digital inputs at 0
2
mA
lVD
fCLOCK = 40MSPS, fOUT = 2.2MHz
4.3
mA
IVD
Standby mode, clock off
0.02
mA
IVD
Power dissipation, PD(8)
Standby mode, CS = 0, fCLOCK = 25MSPS
fCLOCK = 25MSPS, digital inputs at 0
1.3
mA
20
25
mW
PD
fCLOCK = 40MSPS, fOUT = 2.2MHz
29
mW
PD
Standby mode, fCLOCK = 25MSPS
5.5
7
mW
PD
Power-down mode, clock off, digital inputs at 0
25
μW
Thermal resistance
TQFP-48 θ_JA
θ_JC
97.5
°C/W
20
°C/W
(1) _{At output IOUT1, IOUT2, while driving a 250Ω load, transition from 000h to FFFh.}
(2) _{Measured at fCLOCK = 25MSPS and fOUT = 1.0MHz.}
(3) _{Differential, transformer (n = 4:1) coupled output, RL = 400Ω.}
(4) _{Differential outputs with a 250Ω load.}
(5) _{Nominal full−scale output current is IOUTFS + 32 IREF + 32}
(6) _{Ensured by design and characterization; not production tested.}
(7) _{Gain error to remain ≤10% FSR over the full compliance range.}
(8) _{Combined power dissipation of I-DAC and V-DAC.}
V_REF
R_SET
;
with
V_REF
+
1.22V (typ) and R_SET
+
19.6kW (1%)
4