DDC316_17 Datasheet, PDF (3/28 Pages) Texas Instruments – 16-Channel, Current-Input Analog-to-Digital Converter

DDC316
www.ti.com......................................................................................................................................................... SBAS370A – MARCH 2008 – REVISED APRIL 2009
ELECTRICAL CHARACTERISTICS
At T_A = +25°C, AVDD = +5V, DVDD = +3.3V, VREF = +4.096V, t_INT = 20µs, Range = 12pC, Format = 16 bits, CLK = 40MHz,
and HI_SPEED Bit = 1, unless otherwise noted.
PARAMETER
ANALOG INPUT RANGE
Range 1
Range 2
Range 3
Negative Full-Scale Range
DYNAMIC CHARACTERISTICS
Data Rate
Integration Time, t_INT
System Clock Input
Data Clock (DCLK)
ACCURACY
Resolution
Noise, Low-Level Input⁽¹⁾
Integral Linearity Error⁽⁴⁾
Input Bias Current
Range Error Match⁽⁵⁾
Range Sensitivity to VREF
Offset Error
Offset Error Match⁽⁵⁾
DC Bias Voltage⁽⁷⁾
Power-Supply Rejection Ratio
PERFORMANCE OVER TEMPERATURE
Offset Drift
Offset Drift Stability
DC Bias Voltage Drift⁽⁷⁾
Input Bias Current Drift
Range Drift⁽⁸⁾
Range Drift Match⁽⁵⁾
REFERENCE
Voltage
DIGITAL INPUT/OUTPUT
Logic Levels
V_IH
V_IL
V_OH
V_OL
Input Current (I_IN)
Data Format⁽⁹⁾
TEST CONDITIONS
HI_SPEED Bit = 1
HI_SPEED Bit = 0
Daisy-Chain Readback
C_SENSOR ⁽²⁾ = 10pF
T_A = +25°C
VREF = 4.096 ± 0.1V
Low-Level Input (< 1% FSR)
at DC
Continuous Readings Over 1-Minute
Intervals After a 10-Minute Warm-Up
Doubles Every +10°C
DDC316
MIN
TYP
MAX
2.4
3
3.6
4.8
6
7.2
9.6
12
14.4
–1.786% of Positive Full-Scale Range
100
20
1,000
10
20
1
40
40
20
12
16
3.5
6.0
8
16
±2
±10
0.2
1
1:1
±50
±200
±75
±400
±2
±10
40
±1
<1
±10
25
±10
4.000
4.096
4.200
I_OH = –100µA
I_OL = 100µA
0 < V_IN < DVDD
0.8DVDD
–0.1
DVDD – 0.4
Straight Binary
DVDD + 0.1
0.2DVDD
0.4
±10
UNIT
pC
pC
pC
pC
kSPS
µs
µs
MHz
MHz
MHz
Bits
LSB ⁽³⁾
LSB ⁽³⁾
pA
% of FSR⁽⁶⁾
LSB ⁽³⁾
LSB ⁽³⁾
mV
LSB ⁽³⁾/V
LSB/°C
LSB
µV/°C
ppm/°C
ppm/°C
V
V
V
V
V
µA
(1) Input is less than 1% of full-scale.
(2) C_SENSOR is the capacitance seen at the DDC316 inputs from wiring, photodiode, etc.
(3) LSB refers to 16-bit resolution.
(4) A best-fit line is used in measuring nonlinearity.
(5) Matching between side A and side B of the same input.
(6) FSR is full-scale range.
(7) Voltage produced by the DDC316 at its input that is applied to the sensor.
(8) Range drift does not include external reference drift.
(9) Data format is Straight Binary with a small offset. The number of bits in the output word is controlled by the Format bit.
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Product Folder Link(s): DDC316
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