AMC7836 Datasheet, PDF (10/88 Pages) Texas Instruments – AMC7836 High-Density, 12-Bit Analog Monitor and Control Solution With Multichannel ADC, Bipolar DACs, Temperature Sensor, and GPIO Ports

AMC7836
SLAS986C – NOVEMBER 2014 – REVISED APRIL 2016
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6.6 Electrical Characteristics: ADC and Temperature Sensor
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These
specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of
the product containing it. AV_DD = DV_DD = 4.5 to 5.5 V, AV_CC = 12 V, IOV_DD = 1.8 to 5.5 V, AGND = DGND = 0 V, AV_EE =
AV_SSB = AV_SSC = AV_SSD = –12 V (for DAC groups in negative range) or 0 V (for DAC groups in positive ranges), DAC output
range = 0 to 10 V for all groups, no load on the DACs, T_A = –40°C to 105°C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Resolution
12
Bits
Integral nonlinearity
Unipolar input channels
Bipolar input channels
±0.5
±1
LSB
±0.5
±1.5
Differential nonlinearity
Specified monotonic. All input channels
±0.5
±1
LSB
UNIPOLAR ANALOG INPUTS: LV_ADC16 to LV_ADC20
Absolute input voltage range
Full scale input range
Input capacitance
V_ref measured at REF_CMP pin
AGND – 0.2
0
AV_DD + 0.2
V
2 × V_ref
V
34
pF
DC input leakage current
Unselected ADC input
±10
µA
Offset error
±1
±5
LSB
Offset error match
±0.5
LSB
Gain error⁽¹⁾
±0.5
±5
LSB
Gain error match
±1
LSB
Update time
Single unipolar input, temperature sensor disabled
11.5
µs
BIPOLAR ANALOG INPUTS: ADC_0 to ADC_15
Absolute input voltage range
–13
13
V
Full scale input range
–12.5
12.5
V
Input resistance
175
kΩ
Offset error
Gain error⁽¹⁾
±0.25
±0.5
±5
LSB
±5
LSB
Update time
Single bipolar input, temperature sensor disabled
34.5
µs
TEMPERATURE SENSOR
Operating range
–40
125
°C
Accuracy
Resolution
T_A = –40°C to 125°C, AV_DD = 5 V
LSB size
±1.25
0.25
±2.5
°C
°C
Update time
All ADC input channels disabled
256
µs
ADC UPDATE TIME
Internal oscillator frequency
3.7
4
4.3
MHz
ADC update time
All 21 ADC inputs enabled, temperature sensor
disabled.
All 21 ADC inputs enabled, temperature sensor
enabled.
609.5
µs
865.5
µs
INTERNAL REFERENCE (INTERNAL REFERENCE NOT ACCESSIBLE)
Initial accuracy
Reference temperature coefficient
T_A = 25°C
2.4925
2.5
2.5075
V
12
35 ppm/°C
INTERNAL ADC REFERENCE BUFFER
Reference buffer offset
T_A = 25°C
±5
mV
(1) Internal reference contribution not included.
10
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