MSC1212Y2 Datasheet, PDF (4/69 Pages) Burr-Brown (TI) – Precision Analog-to-Digital Converter (ADC)

ELECTRICAL CHARACTERISTICS: AV_DD = 5V (Cont.)
All specifications from T_MIN to T_MAX, DV_DD = +2.7V to 5.25V, f_MOD = 15.625kHz, PGA = 1, Buffer ON, f_DATA = 10Hz, Bipolar, and V_REF ≡ (REF IN+) – (REF IN–) = +2.5V,
unless otherwise noted. For V_DAC, V_REF = AV_DD, R_LOAD = 10kΩ, and C_LOAD = 200pF, unless otherwise noted.
PARAMETER
CONDITION
MSC1212Yx
MIN
TYP
MAX
UNITS
VOLTAGE DAC OUTPUT CHARACTERISTICS⁽⁶⁾
Output Voltage Range
Output Voltage Settling Time
Slew Rate
AGND
AV_DD
V
To ±0.003% FSR, 0200_H to FD00_H
8
µs
1
V/µs
DC Output Impedance
7
Ω
Short-Circuit Current
All 1s Loaded to DAC Register
20
mA
IDAC OUTPUT CHARACTERISTICS
Full-Scale Output Current
Maximum Short-Circuit Current Duration
Compliance Voltage
Relative Accuracy
Zero Code Error
Full-Scale Error
Gain Error
Maximum V_REF = 2.5V
Over Full Range
25
Indefinite
AV_DD – 1.5
0.185
0.5
–0.4
–0.6
mA
V
% of FSR
% of FSR
% of FSR
% of FSR
ANALOG POWER-SUPPLY REQUIREMENTS
Analog Power-Supply Voltage
Analog Current
ADC Current
I_ADC + I_VREF
I_ADC
AV_DD
Analog OFF, PDAD = 1
PGA = 1, Buffer OFF
PGA = 128, Buffer OFF
4.75
5.25
V
<1
nA
200
µA
500
µA
PGA = 1, Buffer ON
240
µA
PGA = 128, Buffer ON
850
µA
VDAC Current
I_VDAC Excluding Load Current External Reference
250
µA
V_REF Supply Current
I_VREF
ADC ON, V_DAC OFF
250
µA
NOTES: (1) Calibration can minimize these errors. (2) The gain calibration cannot have a REF IN+ of more than AV_DD – 1.5V with buffer ON. To calibrate gain,
turn buffer off. (3) ∆V_OUT is change in digital result. (4) 9pF switched capacitor at f_SAMP clock frequency (see Figure 6). (5) Linearity calculated using a reduced code
range of 512 to 65024; output unloaded. (6) Ensured by design and characterization, not production tested.
ELECTRICAL CHARACTERISTICS: AV_DD = 3V
All specifications from T_MIN to T_MAX, AV_DD = +3V, DV_DD = +2.7V to 5.25V, f_MOD = 15.625kHz, PGA = 1, Buffer ON, f_DATA = 10Hz, Bipolar, and V_REF ≡ (REF IN+) – (REF IN–) = +1.25V,
unless otherwise noted. For V_DAC, V_REF = AV_DD, R_LOAD = 10kΩ, and C_LOAD = 200pF, unless otherwise noted.
MSC1212Yx
PARAMETER
CONDITION
MIN
TYP
MAX
UNITS
ANALOG INPUT (AIN0-AIN7, AINCOM)
Analog Input Range
Full-Scale Input Voltage Range
Differential Input Impedance
Input Current
Bandwidth
Fast Settling Filter
Sinc² Filter
Sinc³ Filter
Programmable Gain Amplifier
Input Capacitance
Input Leakage Current
Burnout Current Sources
Buffer OFF
Buffer ON
(In+) – (In–); See Figure 4
Buffer OFF
Buffer ON
AGND – 0.1
AV_DD + 0.1
V
AGND + 50mV
AV_DD – 1.5
V
±V_REF/PGA
V
7/PGA
MΩ
0.5
nA
–3dB
–3dB
–3dB
User-Selectable Gain Ranges
Buffer On
Multiplexer Channel Off, T = +25°C
Sensor Input Open Circuit
0.469 • f_DATA
0.318 • f_DATA
0.262 • f_DATA
1
128
9
pF
0.5
pA
±2
µA
ADC OFFSET DAC
Offset DAC Range
Offset DAC Monotonicity
Offset DAC Gain Error
Offset DAC Gain Error Drift
±V_REF/(2 • PGA)
8
±1.5
1
V
Bits
% of Range
ppm/°C
SYSTEM PERFORMANCE
Resolution
ENOB
Output Noise
No Missing Codes
Integral Nonlinearity
Offset Error
Offset Drift⁽¹⁾
Gain Error⁽²⁾
Gain Error Drift⁽¹⁾
System Gain Calibration Range
System Offset Calibration Range
Sinc³ Filter
End Point Fit, Differential Input
After Calibration
Before Calibration
After Calibration
Before Calibration
24
22
See Typical Characteristics
24
±0.0015
7.5
0.02
0.005
1.0
80
120
–50
50
Bits
Bits
Bits
%FSR
ppm of FS
ppm of FS/°C
%
ppm/°C
% of FS
% of FS
4
MSC1212
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