LTC1199 LINER [Linear Technology], LTC1199 Datasheet
LTC1199
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LTC1199 Summary of contents
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... These 10-bit, switched-capacitor, successive approximation ADCs in- clude a sample-and-hold. The LTC1197/LTC1197L have a differential analog input with an adjustable reference pin. The LTC1199/LTC1199L offer a software-selectable 2-channel MUX. The 3-wire serial I/O, MSOP and SO-8 packages, 2.7V operation and extremely high sample rate-to-power ratio make these ADCs ideal choices for compact, low power high speed systems ...
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... Hold Time CS Low After Last CLK hCS (Notes 1, 2) Operating Temperature Range LTC1197C/LTC1197LC LTC1199C/LTC1199LC ........................... 0.3V CC LTC1197I/LTC1197LI LTC1199I/LTC1199LI ........................ – 0.3V CC Lead Temperature (Soldering, 10 sec)................. 300 ORDER PART NUMBER 1 LTC1197LCMS8 CS + – IN GND 4 MS8 PART MARKING ...
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... CONDITIONS MIN TYP 2.7 0. LTC1199L LTC1199L 40% CLK CLK(MAX 40% CLK CLK(MAX LTC1197 MIN TYP 10 6V 0.2 CC > 6V 0.2 CC LTC1197/LTC1197L LTC1199/LTC1199L LTC1199 MAX MIN TYP MAX UNITS 40% 1/f 40% 1 LTC1199L MAX MIN TYP MAX UNITS 4 2.7 4 3.5 0.01 3 40% 1/f 40% ...
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... 0.05V LTC1197 LTC1199 TYP MAX MIN TYP MAX 60 60 – 64 – 64 – 68 – 68 – 65 – 65 – 70 – 70 LTC1197L LTC1199L TYP MAX MIN TYP MAX 58 58 – 60 – 60 – 63 – 63 – 60 – 60 – 65 – 65 UNITS LSB LSB LSB Bits ...
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... LTC1197/LTC1197L LTC1199/LTC1199L LTC1197 LTC1199 TYP MAX MIN TYP MAX 2.4 0.8 0.8 2.5 2.5 – 2.5 – 2.5 4.74 4.5 4.74 4.72 2.4 4.72 0.4 0 – 25 – 0.001 3 0.5 1 0.001 3 0.001 3 4 8.5 22.5 25 LTC1197L LTC1199L TYP MAX MIN TYP MAX 1.9 0.45 0.45 2.5 2.5 – 2.5 – 2.5 2.60 2.3 2.60 2.45 2.1 2.45 0.3 0 – 6.5 – 6 0.001 3.0 0.250 0.5 0.001 3 0.001 3 0.8 2 0.8 2 2.2 2.2 UNITS ...
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... LTC1197L LTC1199L TYP MAX MIN TYP MAX 2.9 2.9 210 130 180 130 180 250 250 120 250 120 250 100 200 100 200 120 45 120 ...
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... C A – 10 – 20 – 30 – 2.7V CC – 250kHz SMPL – – 500kHz SMPL – 100 FREQUENCY (kHz) LTC1197/LTC1197L LTC1199/LTC1199L Supply Current vs Sampling Frequency 10000 80 70 1000 7.2MHz CLK 50 100 2. 3.5MHz 20 CLK ...
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... LTC1197/LTC1197L LTC1199/LTC1199L W U TYPICAL PERFOR A LTC1197L Change in Linearity vs Supply Voltage 1 2.5V REF 0 3.5MHz CLK 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 – 1 SUPPLY VOLTAGE (V) 1197/99 G10 LTC1197 Change in Linearity vs Supply Voltage 1 REF 0 7MHz CLK 0.6 0.4 0.2 0 – 0.2 – 0.4 – 0.6 – 0.8 – 1 ...
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... SUPPLY VOLTAGE (V) † 0.1LSB) Maximum CLK frequency represents the clock frequency at which a 0.1LSB shift in the error at any code transition from its 3.5MHz value is first detected. LTC1197/LTC1197L LTC1199/LTC1199L Gain Error vs Temperature – 0.2 REF f = 7.2MHz CLK – 0.4 – ...
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... GND. W BLOCK I D AGRA + IN (CH0) – IN (CH1 (Pin 5): LTC1199/LTC1199L Digital Data Input. The IN A/D configuration word is shifted into this input. D (Pin 6): Digital Data Output. The A/D conversion OUT result is shifted out of this output. CLK (Pin 7): Shift Clock. This clock synchronizes the serial data transfer ...
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... THAT THE OUTPUT IS LOW UNLESS DISABLED BY THE OUTPUT CONTROL CLK 1197/99 TC03 D OUT LTC1197/LTC1197L LTC1199/LTC1199L Rise and Fall Times, t OUT Voltage Waveforms for t dis V t dis LTC1199/LTC1199L t Voltage Waveforms en START 1197/99 TC04 IH 90% 10% 1197/99 TC05 ...
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... They are packaged in 8-pin MSOP and SO packages. The LTC1197L/LTC1199L operate on a single supply ranging from 2.7V to 4V. The LTC1197 operates on a single supply ranging from while the LTC1199 operates from 4V to 6V. These ADCs contain a 10-bit, switched-capacitor ADC, a sample-and-hold and a serial port (see Block Diagram). ...
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... CLK is continuously running. INPUT DATA WORD (LTC1199/LTC1199L ONLY) The LTC1199 4-bit data word is clocked into the D on the rising edge of the clock after CS goes low and the start bit has been recognized. Further inputs on the D are then ignored until the next CS cycle. The input word is ...
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... The LTC1199/ LTC1199L will take control of the data line and drive it low on the 4th falling CLK edge after the start bit is received (see Figure 3). Therefore the processor port line must be switched to an input before this happens to avoid a conflict ...
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... LTC1199L. These pin compatible devices offer specified performance to 2.7V supplies. OPERATING ON OTHER THAN 5V SUPPLIES The LTC1197 operates from supplies and the LTC1199 operates from supplies. The LTC1197L/ LTC1199L operate from 2. supplies. To use these parts at other than 5V supplies a few things must be kept when mind. ...
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... The the LTC1197/LTC1197L acquires input signals for the “+” input relative to the “–” input during the t time (see Figure 1). However the the LTC1199/ SMPL LTC1199L can sample input signals from the “+” input relative to ground and from the “–” input relative to ground in addition to acquiring signals from the “ ...
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... CLK edge (see Figure 1). However, the input capacitor of the LTC1199/ LTC1199L is switched onto “+” input after ODD/SGN is clocked into the ADC and remains there until the fourth falling CLK edge (see Figure 5). The sample time is 1.5 CLK cycles before conversion starts. The voltage on the “ ...
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... CLK cycle), a capacitive current spike will be generated on the reference pin by the ADC. These current spikes settle quickly and do not cause a problem. Reduced Reference Operation The minimum reference voltage of the LTC1199 is 4V and the minimum reference voltage of the LTC1199L is 2.7V because the V (e.g., 1 F), the F together ...
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... Bypassing Reference Input with Divider Bypassing the reference input with a divider is also pos- sible. However, care must be taken to make sure that the DC voltage on the reference input will not drop too much below the intended reference voltage. LTC1197/LTC1197L LTC1199/LTC1199L , will add CC REF ...
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... LTC1197/LTC1197L LTC1199/LTC1199L PPLICATI S I FOR ATIO Signal-to-Noise Ratio The signal-to-noise ratio (SNR) is the ratio between the RMS amplitude of the fundamental input frequency to the RMS amplitude of all other frequency components at the A/D output. This includes distortion as well as noise products and for this reason it is sometimes referred to as signal-to-noise + distortion [S/(N + D)] ...
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... TYPE OF INTERFACE SPI SPI SPI SPI SCI Synchronous SCI Synchronous SCI Synchronous SCI Synchronous SCI Synchronous CSI/O TM MICROWIRE MICROWIRE/PLUS MICROWIRE/PLUS MICROWIRE/PLUS Serial Port Serial Port SPI, SCI Synchronous SPI, SCI Synchronous LTC1197/LTC1197L LTC1199/LTC1199L word to the LTC1199 and clocks the ...
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... LTC1199 INPUTS OUT D from LTC1199 Stored in MC68HC05C4 OUT LOCATION LOCATION Data Exchange Between LTC1199 and MC68HC05C4 BYTE 1 ODD SIGN DUMMY DUMMY ODD/ DON‘T CARE SIGN ...
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... SERIAL INTERFACE section. This saves one wire. The 8051 first sends the start bit and MUX address to the LTC1199 over the data line connected to P1.2. Then P1.2 is reconfigured as an input (by writing one) and the 8051 reads back the 8-bit A/D result over the same data line ...
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... LTC1197/LTC1197L LTC1199/LTC1199L O U TYPICAL A PPLICATI A “Quick Look” Circuit for the LTC1197 Users can get a quick look at the function and timing of the LTC1197 by using the following simple circuit (Figure 11 tied applied to the +IN input and REF CC IN the – IN input is tied to the ground driven at 1/16 ...
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... CHIP SELECT SERIAL CLK DATA IN DATA OUT Figure 13. The LTC1199 Digitizes Resistive Touchscreen X and Y Axis Voltages. The ADC’s Auto Shutdown Feature Helps Maximize Battery Life in Portable Touchscreen Equipment S interface. RC combinations R1C1, R2C2 and R3C3 form lowpass filters that attenuate noise from possible sources such as the processor clock, switching power supplies and bus signals ...
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... A TYPICAL PPLICATI Battery Current Monitor The LTC1197L/LTC1199L are ideal for 3V systems. Fig- ure 14 shows a 2. battery current monitor that draws only from the battery it monitors, sampling at a 1Hz rate. To minimize supply current, the microprocessor uses the LTC1152 SHDN pin to turn on the op amp prior to making a measurement and then turn it off after the measurement has been made ...
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... S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.228 – 0.244 (5.791 – 6.197) 0.053 – 0.069 (1.346 – 1.752) 0 – 8 TYP 0.014 – 0.019 (0.355 – 0.483) LTC1197/LTC1197L LTC1199/LTC1199L 0.118 0.004** (3.00 0.10 0.006 0.004 (0.15 0.10) 0.025 (0 ...
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... LTC1197/LTC1197L LTC1199/LTC1199L RELATED PARTS PART NUMBER SAMPLE RATE 8-Bit, Pin Compatible Serial Output ADCs LTC1096/LTC1096L 33kHz/15kHz LTC1098/LTC1098L 33kHz/15kHz LTC1196 1MHz/383kHz LTC1198 750kHz/287kHz 10-Bit Serial I/O ADCs LTC1090 25kHz LTC1091 30kHz LTC1092 35kHz LTC1093 25kHz LTC1094 25kHz LTC1283 15kHz 12-Bit Serial I/O ADCs LTC1285/LTC1288 7 ...