THS1408-EP_14 Datasheet, PDF (6/28 Pages) Texas Instruments – 14-BIT, 3/8 MSPS DSP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTER WITH INTERNAL REFERENCE AND PGA

THS1408-EP
14-BIT, 3/8 MSPS DSP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTER
WITH INTERNAL REFERENCE AND PGA
SGLS129B − JULY 2002 − REVISED FEBRUARY 2010
electrical characteristics over recommended operating free-air temperature range,
AV_DD = DV_DD = 3.3 V (unless otherwise noted) (continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Reference Voltage
VBG
Bandgap voltage, internal mode
Input impedance
1.425
1.5 1.575 V
40
kΩ
Positive reference voltage, REF+
2.5
V
Negative reference voltage, REF−
0.5
V
Reference difference, ΔREF, REF+ − REF−
2
V
Accuracy, internal reference
5%
Temperature coefficient
40
ppm/°C
Voltage coefficient
200
ppm/V
Analog Inputs
Positive analog input, IN+
Negative analog input, IN−
Analog input voltage difference
Input impedance
ΔAin = IN+ − IN−, V_ref = REF+ − REF−
0
0
−V_ref
AV_DD
V
AV_DD
V
V_ref
V
25
kΩ
PGA range
0
7 dB
PGA step size
1
dB
PGA gain error
±0.25 dB
Digital Inputs
V_IH
High-level digital input
V_IL
Low-level digital input
Input capacitance
2
V
0.8 V
5
pF
Input current
±1 μA
Digital Outputs
V_OH
High-level digital output
V_OL
Low-level digital output
I_OZ
Output current, high impedance
Clock Timing (CS low)
f_CLK
Clock frequency
t_d
Output delay time
Latency
† _{This parameter is not production tested.}
I_OH = 50 μA
I_OL = 50 μA
2.6
V
0.4 V
±10 μA
0.1^†
8
9.5
8 MHz
25 ns
Cycles
6
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