Datasheet

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ADS1216
SBAS171D – NOVEMBER 2000 – REVISED SEPTEMBER 2006
ELECTRICAL CHARACTERISTICS: AV
DD
= +5V (continued)
All specifications at T
MIN
to T
MAX
, AV
DD
= +5V, DV
DD
= +2.7V to +5.25V, f
MOD
= 19.2kHz, PGA = 1, Buffer ON, R
DAC
= 150k Ω ,
f
DATA
= 10Hz, and V
REF
= +2.5V, unless otherwise specified.
ADS1216
PARAMETER CONDITIONS MIN TYP MAX UNIT
ON-CHIP VOLTAGE REFERENCE
Output voltage REF HI = 1 2.4 2.5 2.6 V
REF HI = 0 1.25 V
Short-circuit current source 8 mA
Short-circuit current sink 50 µ A
Short-circuit duration Sink or source Indefinite
Drift 15 ppm/ ° C
Noise V
RCAP
= 0.1 µ F, BW = 0.1Hz to 100Hz 10 µ V
PP
Output impedance Sourcing 100 µ A 3 Ω
Startup time 50 µ s
IDAC
Full-scale output current R
DAC
= 150k Ω , range = 1 0.5 mA
R
DAC
= 150k Ω , range = 2 1 mA
R
DAC
= 150k Ω , range = 3 2 mA
R
DAC
= 15k Ω , range = 3 20 mA
Maximum short-circuit current duration R
DAC
= 10k Ω Indefinite
R
DAC
= 0k Ω 10 Minute
Monotonicity R
DAC
= 150k Ω 8 Bits
Compliance voltage 0 AV
DD
– 1 V
Output impedance See Typical Characteristics
Power-supply rejection ratio V
OUT
= AV
DD
/2 400 ppm/V
Absolute error Individual IDAC 5 %
Absolute drift Individual IDAC 75 ppm/ ° C
Mismatch error Between IDACs, same range and code 0.25 %
Mismatch drift Between IDACs, same range and code 15 ppm/ ° C
POWER-SUPPLY REQUIREMENTS
Power-supply voltage AV
DD
4.75 5.25 V
Analog current (I
ADC
+ I
VREF
+ IDAC) PDWN = 0 or SLEEP 1 nA
ADC current (I
ADC
) PGA = 1, buffer OFF 140 225 µ A
PGA = 128, buffer OFF 430 650 µ A
PGA = 1, buffer ON 180 275 µ A
PGA = 128, buffer ON 800 1250 µ A
V
REF
current (I
VREF
) 250 375 µ A
IDAC current (IDAC) Excludes load current 480 675 µ A
Digital current Normal mode, DV
DD
= 5V 180 275 µ A
SLEEP mode, DV
DD
= 5V 150 µ A
Read data continuous mode, DV
DD
= 5V 230 µ A
PDWN 1 nA
PGA = 1, buffer OFF, REFEN = 0,
Power dissipation 1.6 2.5 mW
IDACS OFF, DV
DD
= 5V
TEMPERATURE RANGE
Operating –40 +85 ° C
Storage –60 +100 ° C
4
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