Datasheet

www.ti.com
ELECTRICAL CHARACTERISTICS (Continued)
TLV5638
SLAS225C – JUNE 1999 – REVISED JANUARY 2004
over recommended operating conditions, V
ref
= 2.048 V, V
ref
= 1.024 V (unless otherwise noted)
STATIC DAC SPECIFICATIONS
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Resolution 12 bits
C and I
±1.7 ±4 LSB
suffixes
Integral nonlinearity, end point ad-
INL See
(1)
justed
Q and M
±1.7 ±6 LSB
suffixes
DNL Differential nonlinearity See
(2)
±0.4 ±1 LSB
Zero-scale error (offset error at zero
E
ZS
See
(3)
±24 mV
scale)
Zero-scale-error temperature coef-
E
ZS
TC See
(4)
10 ppm/°C
ficient
% full
E
G
Gain error See
(5)
±0.6
scale V
E
G
T
C
Gain error temperature coefficient See
(6)
10 ppm/°C
OUTPUT SPECIFICATIONS
V
O
Output voltage R
L
= 10 k Ω 0 V
DD
-0.4 V
% full
Output load regulation accuracy V
O
= 4.096 V, 2.048 V, R
L
= 2 k Ω ±0.25
scale V
REFERENCE PIN CONFIGURED AS OUTPUT (REF)
Vref(OUTL) Low reference voltage 1.003 1.024 1.045 V
Vref(OUTH) High reference voltage V
DD
> 4.75 V 2.027 2.048 2.069 V
Iref(source) Output source current 1 mA
Iref(sink) Output sink current -1 mA
Load capacitance 100 pF
PSRR Power supply rejection ratio -65 dB
REFERENCE PIN CONFIGURED AS INPUT (REF)
V
I
Input voltage 0 V
DD
-1.5 V
R
I
Input resistance 10 M Ω
C
I
Input capacitance 5 pF
Fast 1.3 MHz
Reference input bandwidth REF = 0.2 V
pp
+ 1.024 V dc
Slow 525 kHz
Reference feedthrough REF = 1 V
pp
at 1.024 V dc
(7)
-80 dB
DIGITAL INPUTS
I
IH
HIgh-level digital input current V
I
= V
DD
1 µA
I
IL
Low-level digital input current V
I
= 0 V -1 µA
C
i
Input capacitance 8 pF
(1) The relative accuracy or integral nonlinearity (INL) sometimes referred to as linearity error, is the maximum deviation of the output from
the line between zero and full scale excluding the effects of zero code and full-scale errors. Tested from code 32 to 4095.
(2) The differential nonlinearity (DNL) sometimes referred to as differential error, is the difference between the measured and ideal 1 LSB
amplitude change of any two adjacent codes. Monotonic means the output voltage changes in the same direction (or remains constant)
as a change in the digital input code.
(3) Zero-scale error is the deviation from zero voltage output when the digital input code is zero.
(4) Zero-scale-error temperature coefficient is given by: E
ZS
TC = [E
ZS
(T
max
) - E
ZS
(T
min
)]/V
ref
× 10
6
/(T
max
- T
min
).
(5) Gain error is the deviation from the ideal output (2V
ref
- 1 LSB) with an output load of 10 k Ω excluding the effects of the zero-error.
(6) Gain temperature coefficient is given by: E
G
TC = [E
G
(T
max
) - E
G
(T
min
)]/V
ref
× 10
6
/(T
max
- T
min
).
(7) Reference feedthrough is measured at the DAC output with an input code = 0x000.
5