ADS-949
2
®®
+25°C 0 to +70°C –55 to +125°C
ANALOG INPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Bipolar Input Voltage Range
➁
±1 —±2.5 ±1 —±2.5 ±1 —±2.5 Volts
Unipolar Input Voltage Range
➁
0 to 2 —0 to 5 0 to 2 —0 to 5 0 to 2 —0 to 5 Volts
Input Resistance (Vin A) —400 ——400 ——400 —
Ω
Input Capacitance —615—615—615pF
DIGITAL INPUT
Logic Levels
Logic "1" +2.0 ——+2.0 ——+2.0 ——Volts
Logic "0" ——+0.8 ——+0.8 ——+0.8 Volts
Logic Loading "1" ——+20 ——+20 ——+20 µA
Logic Loading "0" ——–20 ——–20 ——–20 µA
Start Convert Positive Pulse Width
➂
—50 ——50 ——50 —ns
STATIC PERFORMANCE
Resolution —14 ——14 ——14 —Bits
Integral Nonlinearity —±0.75 ——±0.75 ——±1 —LSB
Differential Nonlinearity (fin = 10kHz) –0.95 ±0.5 +1.25 –0.95 ±0.5 +1.25 –0.95 ±0.5 +1.5 LSB
Full Scale Absolute Accuracy —±0.15 ±0.4 —±0.15 ±0.4 —±0.4 ±0.8 %FSR
Bipolar Zero Erro r (Tech Note 2) —±0.1 ±0.3 —±0.1 ±0.3 —±0.3 ±0.6 %FSR
Gain Error (Tech Note 2) —±0.2 ±0.4 —±0.2 ±0.4 —±0.4 ±1.5 %
No Missing Codes (fin = 10kHz) 14 ——14 ——14 ——Bits
DYNAMIC PERFORMANCE
Peak Harmonics (–0.5dB)
dc to 1MHz —–83 –76 —–83 –75 —–79 –71 dB
1MHz to 2.5MHz —–78 –72 —–78 –72 —–73 –68 dB
2.5MHz to 5MHz —–76 –71 —–76 –71 —–71 –65 dB
Total Harmonic Distortion (–0.5dB)
dc to 1MHz —–81 –74 —–81 –74 —–77 –70 dB
1MHz to 2.5MHz —–76 –71 —–76 –71 —–72 –66 dB
2.5MHz to 5MHz —–74 –69 —–74 –69 —–69 –63 dB
Signal-to-Noise Ratio
(w/o distortion, –0.5dB)
dc to 1MHz 72 78 —72 78 —70 78 —dB
1MHz to 2.5MHz 72 77 —72 77 —70 77 —dB
2.5MHz to 5MHz 72 76 —72 76 —70 76 —dB
Signal-to-Noise Ratio
➃
(& distortion, –0.5dB)
dc to 1MHz 70 77 —70 74 —68 73 —dB
1MHz to 2.5MHz 70 74 —70 74 —66 71 —dB
2.5MHz to 5MHz 69 73 —69 73 —65 70 —dB
Noise —150 ——150 ——150 —µVrms
Two-tone Intermodulation
Distortion (fin = 2.45MHz,
1.975MHz, fs = 10MHz, –0.5dB) —–82 ——–82 ——–82 —dB
Input Bandwidth (–3dB)
Small Signal (–20dB input) —30 ——30 ——30 —MHz
Large Signal (–0.5dB input) —20 ——20 ——20 —MHz
Feedthrough Rejection (fin = 5MHz) —85 ——85 ——85 —dB
Slew Rate —±400 ——±400 ——±400 —V/µs
Aperture Delay Time —+5 ——+5 ——+5 —ns
Aperture Uncertainty —2—— 2——2—ps rms
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, +VDD = +5V, –VDD = –5V, +Vcc = +15V, 12.8MHz sampling rate , ±2.5V input range, and a minimum 3 minute warmup
➀
unless otherwise specified.)
PARAMETERS MIN. TYP. MAX. UNITS
Operating Temp. Rang e , Case
ADS-949MC, GC 0 —+70 °C
ADS-949MM, GM, –55 —+125 °C
Thermal Impedance
θ
jc —6—°C/Watt
θ
ca —23 —°C/Watt
Storage T emperature Range –65 —+150 °C
Package Type 32-pin, metal-sealed, ceramic DDIP or SMT
Weight 0.46 ounces (13 grams)
ABSOLUTE MAXIMUM RATINGS
PARAMETERS LIMITS UNITS
+5V Supply (Pins 27, 30) 0 to +6 Volts
+15V Supply (Pin 28) 0 to +16 Volts
–5V Supply (Pin 3) 0 to –5.5V Volts
Digital Input (Pin 7) –0.3 to +VDD +0.3 Volts
Analog Input (Pins 1, 2) ±5 Volts
Lead Temperature (10 seconds) +300 °C
PHYSICAL/ENVIRONMENTAL