CS4122 ONSEMI | Alldatasheet
Document overview
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- PDF pages: 10
Technical content
Features
- Serial Input Bus
- 2.0 MHz Operating Frequency
- Independently Addressable Gauges
- Tangential Drive Algorithm
- 70 mA Drive Circuits
- 0.75° Major Accuracy
- Power−On−Reset
- Protection Features ♦ Short Circuit ♦ Overtemperature
- Internally Fused Leads in SO−24L Package SO−24L DWF SUFFIX CASE 751E A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week MARKING DIAGRAM CS4122 AWLYYWW PIN CONNECTIONS GNDGND GNDGND GNDGND GNDGND COS−SIN+ COS+SIN− SICS SOSCLK C2−VBB /2 C2+C1+ 12 4 FAULTVCC VBBC1− Device Package Shipping †
ORDERING INFORMATION
CS4122XDWF24 SO−24L 31 Units/Rail CS4122XDWFR24 SO−24L 1000 Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com
7 Bit
Figure 1. Block Diagram damage may occur and reliability may be affected.
- 60 second maximum above 183°C.
http://onsemi.com ELECTRICAL CHARACTERISTICS (−40°C ≤ TA ≤ 105°C, 7.5 V ≤ VBB ≤ 14 V, 4.5 V ≤ VCC ≤ 5.5 V; unless otherwise specified.) Characteristic Test Conditions Min Typ Max Unit Supply Voltages and Currents Analog Supply Current VBB = 14 V, no coil loads, R COS , RSIN = 150 Major @ 45° (code = 08016), Both Minors @ 0° (codes = 0016) Major @ 0° (code = 00016), Both Minors @ 56° (codes = 8016) 5.20 310 340 100 mA mA mA Logic Supply Current VCC = 5.5 V SCLK = 2.0 MHz SCLK = 0 MHz, VBB = 0 V 1.0 0.9 2.0 1.5 mA mA Protection and Power−on Reset Thermal Shutdown Drive Outputs Off − 160 − °C Power−on Reset VCC Rising VCC Falling 2.5 4.5 V V Digital Inputs and Outputs Output High Voltage SO = IOUT(HIGH) = 0.8 mA VCC − 0.8 − − V Output Low Voltage SO = IOUT(LOW) = 1.5 mA FAULT , IOUT(LOW) = 2.8 mA 0.4 0.8 V V FAULT Leakage Current VFAULT = 5.0 V − − 25 A Input High Voltage CS, SCLK, SI 0.7 × VCC − − V Input Low Voltage CS, SCLK, SI − − 0.3 × VCC V Input High Current CS, SCLK, SI, VIN = 0.7 × VCC − − 1.0 A Input Low Current CS, SCLK, SI, VIN = 0.3 × VCC − − 1.0 A SCLK Frequency − − − 2.0 MHz SCLK High Time − 175 − − ns SCLK Low Time − 175 − − ns SO Rise Time 0.75 V to VCC − 1.2 V; CL = 90 pF − − 100 ns SO Fall Time VCC − 1.2 V to 0.75 V; CL = 90 pF − − 100 ns SO Delay Time C L = 90 pF − − 150 ns SI Setup Time − 75 − − ns SI Hold Time − 75 − − ns CS Setup Time − 0 − − ns CS Hold Time − 75 − − ns Analog Outputs Output Function Accuracy Major Accuracy Minor Accuracy ±0.75 ±1.00 Output Shutdown Current, Source and Sink VBB = Max VBB = Min mA mA Major Coil Drive Output Voltage − − 0.748 × VBB − V Minor Coil Drive Output Voltage − − 0.744 × VBB − V VBB /2 IDR(V BB /2) = ±50 mA (0.5 × VBB ) − 0.1 − (0.5 × VBB ) + 0.1 V Minimum Load Resistance TA = 105°C TA = 25°C TA = −40°C 229 171 150
http://onsemi.com PIN FUNCTION DESCRIPTION PIN # PIN SYMBOL FUNCTION 1 SCLK Serial clock for shifting in/out of data. Rising edge shifts data on SI into the shift register and the falling edge changes the data on SO. 2 CS When High, allows data at SI to be shifted into the internal shift register with the rising edge of SCLK. The falling edge transfers the shift register contents into the DAC and multiplexer to update the output buffers. The falling edge also re−enables the output drivers if they have been disabled by a fault. 3 SIN− Negative output for SINE coil. 4 SIN+ Positive output for SINE coil. 5, 6, 7, 8, 17, 18, 19, 20 GND Ground for VBB and VCC supplies; device substrate. In the power SOIC package they aid in removing internally generated heat from the package and as such should be soldered to as large a PCB area as possible. 9 VBB /2 1/2 VBB output for biasing the minor coils. 10 C1+ Positive output for the #1 minor coil. 11 C1− Negative output for the #1 minor coil. 12 VCC 5.0 V logic supply. The internal registers and latches are reset by a POR generated by the rising edge of the voltage on this lead. 13 FAULT Open−drain fault flag. A logic low on this lead indicates that an output is shorted or the device is in thermal shutdown. 14 VBB Analog supply. Nominally 12 V. 15 C2+ Positive output for the #2 minor coil. 16 C2− Negative output for the #2 minor coil. 21 COS− Negative output for COSINE coil. 22 COS+ Positive output for COSINE coil. 23 SI Serial data input. Data present at the rising edge of the clock signal is shifted into the internal shift register. 24 SO Serial data output. Existing 12 bit data is shifted out when new data is shifted in. Allows cascading of multiple devices on common serial port.
information such as fuel quantity or battery voltage. (360°) gauge. Only one output varies in any 45° range. as straight lines for simplicity. Figure 2. Major Gauge Outputs
0.748 VBB
Figure 3. Major Gauge Response Figure 4. Minor Gauge Outputs Figure 5. Minor Gauge Outputs microcontroller sends a 12 bit digital word to the CS4122. data associated with the 45° divisions of the 360° driver. Figure 6. Definition of Serial Word
Table 1. Nominal Output for Major Gauge (VBB = 14 V) Table 2. Nominal Output for Minor Gauges (VBB = 14 V) updated and the outputs change accordingly. Figure 7. Serial Data Timing Diagram signals to send to the output amplifiers based upon D9 − D7. the minor gauge outputs are enabled. if the overcurrent situation has been eliminated.
http://onsemi.com PACKAGE DIMENSIONS SO−24L DWF SUFFIX CASE 751E−04 ISSUE E NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. −A− −B− P12X D24X 1324 M0.010 (0.25) B M SAM0.010 (0.25) B ST −T− G22X SEATING PLANE K C R X 45 M F J DIM MIN MAX MIN MAX INCHESMILLIMETERS A 15.25 15.54 0.601 0.612 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.41 0.90 0.016 0.035 G 1.27 BSC 0.050 BSC J 0.23 0.32 0.009 0.013 K 0.13 0.29 0.005 0.011 M 0 8 0 8 P 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 PACKAGE THERMAL DATA Parameter SO−24L Unit R JC Typical 9 °C/W R JA Typical 55 °C/W
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