ADS7869 Datasheet, PDF (9/69 Pages) Texas Instruments – Analog Motor Control Front-End with Simultaneous Sampling on Seven S/H Capacitors and Three 1MSPS, 12-Bit, 12-Channel

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Analog Motor Control FrontĆEnd with Simultaneous Sampling on
Seven S/H Capacitors and Three 1MSPS, 12ĆBit, 12ĆChannel ADCs
ADS7869
SBAS253E − MAY 2003 − REVISED JULY 2006
1.5
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range at –40_C to +85_C, AVDD = 5V, BVDD = 3.3V, VREF = internal +2.5V, fCLK = 16MHz,
fSAMPLE = 1 MSPS, unless otherwise noted.
PARAMETER
CONDITION
Resolution
Analog Input
Full-scale Voltage, Differential
Input Capacitance
Input Leakage Current
CMRR
See Gain Adjustment
At DC
DC Accuracy
No Missing Codes
INL Integral Linearity Error
DNL Differential Linearity Error
V_OS Bipolar Offset Error
V_OS Bipolar Offset Error
V_OS Bipolar Offset Match
V_OS Bipolar Offset Match
V_OS Bipolar Offset Match
TCV_OS Bipolar Offset Error Drift
Gain Error
Synchronous Channels
AX and BX Channels
IU, IV, and IW Channels
A1, B1, A2, and B2 Channels
AX and BX Channels
Max Input Range, Related to REFIN
Gain Error
Every Other Input Range
Gain Error Drift
Max Input Range, Related to REFIN
PSRR Power-Supply Rejection Ratio
Sampling Dynamics
4.5V < AV_DD < 5.5V
t_CONV Conversion Time per ADC
t_AQ Acquisition Time
Throughput Rate
16MHz ≤ f_CLK ≤ 1MHz
Aperture Delay
Aperture Delay Matching
Aperture Jitter
Clock Frequency
AC Accuracy
Total Harmonic Distortion
Signal-to-Noise Distortion
Signal-to-Noise + Distortion
Digital Inputs(2)
Logic Family
VIH High-Level Input Voltage
VIL Low-Level Input Voltage
IIN Input Current
CI Input Capacitance
Digital Outputs(2)
THD
SNR
SINAD
VIN = ±2.5V_PP at 10kHz
VIN = ±2.5V_PP at 10kHz
VIN = ±2.5V_PP at 10kHz
BV_DD to BGND
Logic Family
VOH High-Level Output Voltage
VOL Low-Level Output Voltage
IOZ High-Impedance-State Output Current
CO Output Capacitance
CL Load Capacitance
BV_DD = 4.5V, I_OH = −100µA
BV_DD = 4.5V, I_OL = +100µA
VI = BV_DD to BGND
(1) All values are at TA = +25_C.
(2) Applies for 5.0V nominal supply: 4.5V < BV_DD < 5.5V.
(3) Applies for 3.0V nominal supply: 2.7V < BV_DD < 3.6V.
MIN
12
−REF_ADC
11
0.75
250
1
0.7SV_DD
−0.3
4.44
ADS7869I
TYP(1)
MAX
+REF_ADC
10
±1
64
±1
±2.5
±0.65
±2
2
±6
5
±8
2.5
6
0.5
3
0.5
3
1
0.05
1
1.5
4
3
70
12
1000
20
1
50
16
−78
71
70
CMOS
5
BV_DD + 0.3
0.3SV_DD
±50
CMOS
0.5
±50
5
30
UNIT
Bit
V
pF
nA
dB
Bit
LSB
LSB
LSB
LSB
LSB
LSB
LSB
µV/°C
%
%
ppm/°C
dB
µS
ns
kSPS
ns
ns
ps
MHz
dB
dB
dB
V
V
nA
pF
V
V
nA
pF
pF
3