Datasheet

ADS7800
2
SBAS001A
www.ti.com
SPECIFICATIONS
ELECTRICAL
At T
A
= T
MIN
to T
MAX
, Sampling Frequency, f
S
, = 333kHz, –V
S
= –15V, V
S
= +5V, unless otherwise specified.
ADS7800JP/JU/AH ADS7800KP/KU/BH
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 12 * Bits
ANALOG INPUT
Voltage Ranges ±10V/±5V * V
Impedance ±10V Range 4.4 6.3 8.1 * * * kΩ
±5V Range 2.9 4.2 5.4 * * * kΩ
THROUGHPUT SPEED
Conversion Time Conversion Alone 2.5 2.7 * * µs
Complete Cycle Acquisition + Conversion 2.6 3.0 * * µs
Throughput Rate 333 380 * * kHz
DC ACCURACY
Full Scale Error
(1)
±0.50 ±0.35 %
Full Scale Error Drift 6 * ppm/°C
Integral Linearity Error ±1 ±1/2 LSB
(2)
Differential Linearity Error ±1 ±3/4 LSB
No Missing Codes Ensured Ensured
Bipolar Zero
(1)
±4 ±2LSB
Bipolar Zero Drift 1 * ppm/°C
Power Supply Sensitivity
–16.5V < –V
S
< –13.5V ±1/2 * LSB
–12.6V < –V
S
< –11.4V ±1/2 * LSB
+4.75V < V
S
< +5.25V ±1 ±1/2 LSB
Transition Noise
(3)
0.1 * LSB
AC ACCURACY
Spurious-Free Dynamic Range f
IN
= 47kHz 74 77 77 80 dB
(4)
Total Harmonic Distortion f
IN
= 47kHz –77 –74 –80 –77 dB
Two-tone Intermodulation Distortion f
IN1
= 24.4kHz (–6dB) –77 –74 –80 –77 dB
f
IN2
= 28.5kHz (–6dB)
Signal-to-(Noise + Distortion) Ratio f
IN
= 47kHz 67 70 69 72 dB
Signal-to-Noise Ratio (SNR) f
IN
= 47kHz 68 71 70 73 dB
SAMPLING DYNAMICS
Aperture Delay 13 * ns
Aperture Jitter 150 * ps, rms
Transient Response
(5)
130 * ns
Overvoltage Recovery
(6)
150 * ns
INTERNAL REFERENCE VOLTAGE
Voltage 1.9 2.0 2.1 * * * V
Source Current Available 10 * µA
for External Loads
DIGITAL INPUTS
Logic Levels
V
IL
–0.3 +0.8 * * V
V
IH
+2.4 +5.3 * * V
I
IL
–5 * µA
I
IH
+5 * µA
DIGITAL OUTPUTS
Data Format Parallel, 12-bit or 8-bit/4-bit
Data Coding Binary Offset Binary
V
OL
I
SINK
= 1.6mA 0.0 +0.4 * * V
V
OH
I
SOURCE
= 500µA +2.4 +5.0 * * V
I
LEAKAGE
(High-Z State) ±0.1 ±5**µA
POWER SUPPLIES
Rated Voltage
–V
S
–11.4 –15 –16.5 * * * V
V
S
(V
SA
and V
SD
) +4.75 +5.0 +5.25 * * * V
Current
–I
S
3.5 6 * * mA
I
S
18 25 * * mA
Power Consumption 135 215 * * mW