Datasheet

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RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
TLV5638
SLAS225C – JUNE 1999 – REVISED JANUARY 2004
MIN NOM MAX UNIT
V
DD
= 5 V 4.5 5 5.5 V
Supply voltage, V
DD
V
DD
= 3 V 2.7 3 3.3 V
Power on reset, POR 0.55
(1)
2
(1)
V
V
DD
= 2.7 V 2 V
High-level digital input voltage, V
IH
V
DD
= 5.5 V 2.4
V
DD
= 2.7 V 0.6 V
Low-level digital input voltage, V
IL
TLV5638C and TLV5638I 1
V
DD
= 5.5 V V
TLV5638Q and TLV5638M 0.8
Reference voltage, V
ref
to REF terminal V
DD
= 5 V
(2)
AGND 2.048 V
DD
-1.5 V
Reference voltage, V
ref
to REF terminal V
DD
= 3 V
(2)
AGND 1.024 V
DD
-1.5 V
Load resistance, R
L
2 k Ω
Load capacitance, C
L
100 pF
Clock frequency, f
CLK
20 MHz
TLV5638C 0 70
TLV5638I 40 85
Operating free-air temperature, T
A
°C
TLV5638Q 40 125
TLV5638M 55 125
(1) This parameter is not tested for Q and M suffix devices.
(2) Due to the x2 output buffer, a reference input voltage ≥ (V
DD
-0.4 V)/2 causes clipping of the transfer function. The output buffer of the
internal reference must be disabled, if an external reference is used.
over recommended operating conditions, V
ref
= 2.048 V, V
ref
= 1.024 V (unless otherwise noted)
POWER SUPPLY
TLV5638C, I
TLV5638M
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX
Fast 4.3 7
V
DD
= 5 V,
mA
Int. ref.
Slow 2.2 3.6
Fast 3.8 6.3
V
DD
= 3 V,
mA
No load,
Int. ref.
Slow 1.8 3.0
I
DD
Power supply current All inputs = AGND or V
DD
,
Fast 3.9 6.3
V
DD
= 5 V,
DAC latch = 0x800
mA
Ext. ref.
Slow 1.8 3.0
Fast 3.5 5.7
V
DD
= 3 V,
mA
Ext. ref.
Slow 1.5 2.6
Power-down supply current 0.01 10 µA
Zero scale,
(1)
65
PSRR Power supply rejection ratio dB
Full scale,
(2)
65
(1) Power supply rejection ratio at zero scale is measured by varying V
DD
and is given by: PSRR = 20 log [(E
ZS
(V
DD
max) -
E
ZS
(V
DD
min))/V
DD
max]
(2) Power supply rejection ratio at full scale is measured by varying V
DD
and is given by: PSRR = 20 log [(E
G
(V
DD
max) -
E
G
(V
DD
min))/V
DD
max]
4